model 2234 digital flow computer
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transportation prepaid to Daniel within twelve (12) months of the date of shipment (eighteen (18 ......
Description
MODEL 2234 DIGITAL FLOW COMPUTER __________________________________________
DANIEL INDUSTRIES, INC. HOUSTON, TEXAS
Part Number: 3-9000-333 Revision A
APRIL 1993
MODEL 2234 DIGITAL FLOW COMPUTER _____________________________ THE DANIEL INDUSTRIES, INC. MODEL 2234 DIGITAL FLOW COMPUTER
NOTICE DANIEL INDUSTRIES, INC. ("DANIEL") SHALL NOT BE LIABLE FOR TECHNICAL OR EDITORIAL ERRORS IN THIS MANUAL OR OMISSIONS FROM THIS MANUAL. DANIEL MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WITH RESPECT TO THIS MANUAL AND, IN NO EVENT, SHALL DANIEL BE LIABLE FOR ANY SPECIAL OR CONSEQUENTIAL DAMAGES INCLUDING, BUT NOT LIMITED TO, LOSS OF PRODUCTION, LOSS OF PROFITS, ETC. PRODUCT NAMES USED HEREIN ARE FOR MANUFACTURER OR SUPPLIER IDENTIFICATION ONLY AND MAY BE TRADEMARKS/REGISTERED TRADEMARKS OF THESE COMPANIES.
COPYRIGHT © 1993 BY DANIEL INDUSTRIES, INC. HOUSTON, TEXAS, U.S.A. All rights reserved. No part of this work may be reproduced or copied in any form or by any means - graphic, electronic or mechanical - without first receiving the written permission of Daniel Industries, Inc., Houston, Texas, U.S.A.
____________________________________________________________________ PREFACE
i
_____________________________ MODEL 2234 DIGITAL FLOW COMPUTER WARRANTY Daniel Industries, Inc. ("Daniel") warrants all equipment manufactured by it to be free from defects in workmanship and material, provided that such equipment was properly selected for the service intended, properly installed, and not misused. Equipment which is returned, transportation prepaid to Daniel within twelve (12) months of the date of shipment (eighteen (18) months from date of shipment for destinations outside of the United States), which is found after inspection by Daniel to be defective in workmanship or material, will be repaired or replaced at Daniel’s sole option, free of charge, and return-shipped at lowest cost transportation. All transportation charges and export fees will be billed to the customer. Warranties on devices purchased from third party manufacturers not bearing a Daniel label shall have the warranty provided by the third party manufacturer. Extended warranty - Models 2470, 2480 and 2500 are warranted for a maximum of twenty-four (24) months. The Danalyzer valves are warranted for the life of the instrument and the columns for five years. The warranties specified herein are in lieu of any and all other warranties, express or implied, including any warranty of merchantability or fitness for a particular purpose. Daniel shall be liable only for loss or damage directly caused by its sole negligence. Daniel’s liability for any loss or damage arising out of, connected with, or resulting from any breach hereof shall in no case exceed the price allocable to the equipment or unit thereof which gives rise to the claim. Daniel’s liability shall terminate one year after the delivery of the equipment except for overseas deliveries and extended warranty products as noted above. In no event, whether as a result of breach of warranty or alleged negligence, shall Daniel be liable for special or consequential damages, including, but not limited to, loss of profits or revenue; loss of equipment or any associated equipment; cost of capital; cost of substitute equipment, facilities or services; downtime costs; or claims of customers of the purchaser for such damages.
____________________________________________________________________ ii
PREFACE
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ SECTION 1 1.0
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
1.1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
1.1.1 CHANGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
1.1.2 HARDWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
1.2.1 INPUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
1.2.2 OUTPUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
1.2.3 DISPLAYS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
1.2.4 CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12
1.2.5 ACCURACY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14
1.2.6 OTHER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15
1.2
TABLE OF CONTENTS
iii
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER SECTION 2 2.0
INSTALLATION AND INITIAL STARTUP . . . . . . . . . . . . . . .
17
2.1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17
2.2
UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17
2.3
DAMAGE IN SHIPMENT . . . . . . . . . . . . . . . . . . . . . . . .
17
2.4
SHIPPING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . .
18
2.5
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18
2.5.1 DETERMINING OPTIONS . . . . . . . . . . . . . . . . . . . .
18
2.5.2 CASE MOUNTING . . . . . . . . . . . . . . . . . . . . . . . . .
20
2.5.3
ACCESS TO PLUG-IN PRINTED CIRCUIT BOARDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20
2.5.4 WIRING THE MODEL 2234 . . . . . . . . . . . . . . . . . . .
21
2.5.5
2.6
iv
CONTROLLING EXTERNAL INDUCTIVE CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22
STARTUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24
2.6.1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24
2.6.2 STARTUP PROMPTING SEQUENCE . . . . . . . . . . . .
26
2.6.3 SUPPLEMENTARY STARTUP INSTRUCTIONS . . . .
43
2.6.4 EXAMPLE OF STARTUP SEQUENCE . . . . . . . . . . .
47
TABLE OF CONTENTS
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ SECTION 3 3.0
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
65
3.1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
65
3.2
BASIC CALCULATIONS . . . . . . . . . . . . . . . . . . . . . . . . .
65
3.3
OPERATIONAL OVERVIEW . . . . . . . . . . . . . . . . . . . . .
67
3.4
BASIC KEYBOARD/DISPLAY FUNCTIONS . . . . . . . . . .
75
3.4.1
3.5
SELECTING TEMPORARY OR PERMANENT DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
75
3.4.2 VALIDITY CHECKS OF DATA ENTRIES . . . . . . . .
75
3.4.3 FUNCTIONS OF SPECIFIC KEYS . . . . . . . . . . . . . .
76
3.4.4 INDICATORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
78
DATA INPUT AND OVERRIDING CONTROLS . . . . . . .
79
3.5.1 ENTERING AN OPERATOR - SELECTED VALUE . .
80
3.5.2
3.6
SWITCHING MEASURED - VALUES AND OPERATOR - ENTERED VALUES . . . . . . . . . . . . . .
80
DATA ACCESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
84
3.6.1 TRANSDUCER SCALING . . . . . . . . . . . . . . . . . . . .
85
3.6.2 MEASUREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . .
86
3.6.3 OPERATOR-ENTERED DATA CONSTANTS . . . . . .
88
TABLE OF CONTENTS
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__________________________ MODEL 2234 DIGITAL FLOW COMPUTER
3.7
3.8
vi
3.6.4 COMPUTER CALCULATED VARIABLES . . . . . . . .
89
3.6.5 OUTPUT SCALING . . . . . . . . . . . . . . . . . . . . . . . . .
93
3.6.6 OVER-RIDES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
94
COMPUTER ACTION REQUESTS . . . . . . . . . . . . . . . . .
95
3.7.1 OPERATIONAL ACTIONS . . . . . . . . . . . . . . . . . . . .
96
3.7.2 DIAGNOSTIC AID ACTIONS . . . . . . . . . . . . . . . . . .
98
3.7.3 PARAMETER DISPLAY ACTIONS . . . . . . . . . . . .
103
3.7.4 CLEARING ACTIONS . . . . . . . . . . . . . . . . . . . . . .
105
SERIAL OUTPUT FOR PRINTING . . . . . . . . . . . . . . . .
106
3.8.1 READ CODE USAGE . . . . . . . . . . . . . . . . . . . . . .
108
3.8.2 DELAY (DLY) - READ CODE 44 . . . . . . . . . . . . . .
108
3.8.3 DATE (DTE) - READ CODE 45 . . . . . . . . . . . . . . .
108
3.8.4 REAL TIME CLOCK (TIM) - READ CODE 46 . . . .
109
3.8.5 DAILY PRINT TIME (DPT) - READ CODE 47 . . . .
109
3.8.6 PRINT INTERVAL (INT) - READ CODE 48 . . . . . .
109
3.8.7 IDENTIFICATION (ID) - READ CODE 49 . . . . . . .
110
3.8.8 BAUD RATE (BUD) - READ CODE 50 . . . . . . . . .
110
3.8.9 PRINT TABLE (P01 - P32) - READ CODES 51 - 82 .
110
TABLE OF CONTENTS
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 3.8.10 PRINT FORMAT . . . . . . . . . . . . . . . . . . . . . . . . .
111
FREQUENCY DENSITOMETER OPTION . . . . . . . . . .
112
3.9.1 CALCULATIONS . . . . . . . . . . . . . . . . . . . . . . . . . .
112
3.9.2 PROMPTING SEQUENCE . . . . . . . . . . . . . . . . . . .
115
3.9.3 CONSTANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . .
116
3.9.4 EXAMPLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
117
3.9.5 COMMAND CODES . . . . . . . . . . . . . . . . . . . . . . .
125
3.9.6 ALARMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
125
3.10 CALCULATIONS - EACH METER . . . . . . . . . . . . . . . .
126
3.10.1 STARTUP PROMPTING . . . . . . . . . . . . . . . . . . . .
135
3.9
TABLE OF CONTENTS
vii
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER SECTION 4 4.0
CALIBRATION PROCEDURES . . . . . . . . . . . . . . . . . . . . . . .
137
4.1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
137
4.2
BENCH CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . .
137
4.2.1 DETERMINE THE INSTRUMENT OPTIONS . . . . .
137
4.2.2 REQUIRED TEST EQUIPMENT . . . . . . . . . . . . . . .
137
4.2.3 PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . .
138
4.2.4 POWER SUPPLY ADJUSTMENTS . . . . . . . . . . . . .
138
FIELD CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . .
141
4.3.1 RATE VOLTAGE CALIBRATION . . . . . . . . . . . . .
141
4.3.2 REFERENCE VOLTAGE CALIBRATION . . . . . . . . .
142
4.3.3 RATE CURRENT CALIBRATION . . . . . . . . . . . . . .
142
4.3.4 DENSITY CURRENT CALIBRATION . . . . . . . . . . .
146
4.3
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TABLE OF CONTENTS
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ SECTION 5 5.0
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
147
5.1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
147
5.2
PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . .
147
5.3
RECOMMENDED SPARE PARTS . . . . . . . . . . . . . . . . .
147
5.4
CUSTOMER SERVICE REPORT . . . . . . . . . . . . . . . . .
148
5.5
SHIPPING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . .
148
APPENDIX A: READ CODE LISTING . . . . . . . . . . . . . . . . . . . . . .
149
APPENDIX B: DRAWINGS AND PARTS LIST . . . . . . . . . . . . . . . .
159
TABLE OF CONTENTS
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__________________________ MODEL 2234 DIGITAL FLOW COMPUTER
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TABLE OF CONTENTS
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 1.0
INTRODUCTION
1.1
GENERAL
The Model 2234 Flowmaster Digital Flow Computer is a microprocessor based instrument which is used with differential head meters to measure and display flow rate and compensated total flow. This manual covers software revisions for Daniel Model 2234 flow computers. The Model 2234 is a mass flow computer for use with orifice meters. Additionally, the density of vapor phase ethylene is computed per API-2565. The Software revisions include: ·
Delete flow calculations and all operator access (read codes, command codes, error codes) associated with 1969 revision of standard AGA-3.
·
Add flow calculations for mass flow computations in accordance with the 1991 revision of MPMS Chapter 14.3 (ANSI/API 2530, AGA-3). This includes all read codes, command codes, and error codes.
·
Add computation of viscosity for ethylene.
SECTION 1
1
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 1.1.1 CHANGES It is intended that Model 2230 Series functionality be maintained. Intermediate calculations will have read code assignments and default to the "VAR" mode. If operators desire to override a particular calculation, the read code is put into the "FXD" mode. The startup prompting is modified to add entry information required for compliance with the new measurement standard. For example, there will no longer be a selection for "TAPTYPE". There will be entries for thermal expansion coefficients for both the orifice plate and meter tube. The 800 and 900 series Read Codes will be unchanged in functionality regarding display of Mass Rates and Mass Totals both for individual lines and Station Totals. An operator selection for TAPLOC is included. If downstream taps are selected the Model 2234 will compute upstream pressure based upon differential pressure. Only the upstream expansion factor will be computed. A keyboard entry for isentropic exponent is included. The Model 2234 operator interface consists of a 24-key control keyboard for entering data and functions and an eight character alpha-numeric display. The operator interface permits the operator to enter, inspect, and change measurement parameters; the operator may enter deviation/alarm limits related to critical transducer values, flow rates and totals. Optionally, totalized volume also may be displayed on a six-digit electro-mechanical counter on the instrument front panel.
2
SECTION 1
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 1.1.2 HARDWARE The computer is contained in a standard Daniel Industries, Inc. industrial housing which is 4-inches wide by 8-1/16 inches high by 21-5/16 inches long. These dimensions include an externally mounted 24 VDC or 115/230 VAC power supply at the rear of the unit. It is intended and anticipated that the software described herein will be installed in a large number of existing computers in the field. To minimize field difficulty, no hardware changes are to be required for existing computers originally built as Model 2234-XX3. That is, there will be 4k of RAM on board #1 and the software will reside in the 2716 EPROM. Existing computers originally built as Model 2234-XX1 will require an upgrade of board #1 to include full RAM capability and board #2 will of necessity be replaced. All hardware I/O assignments are to remain unchanged from the current program "FULLETH" P/N 8-2230-008, Rev.L. This requirement is also to minimize impact on instruments in service.
SECTION 1
3
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 1.2
SPECIFICATIONS
1.2.1 INPUTS Pressure, Densitometer and Temperature 1.
Number of Inputs · · · ·
2.
Type Input - Differential for 4 - 20 mA signal from any range transducer within the range of: · · · ·
3. 4. 5. 6. 7. 8.
4
One - Static Pressure, scaled in PSIA Five - Differential Pressure, scaled in inches of water. One - Density, scaled in LBF3. One - Temperature, scaled in oF.
0 - 5000 PSIA for Static Pressure 0 - 1000 inches of water for Differential Pressure 0 - No upper limit LBF3 for Density -50oF to +250oF for Temperature
Differential Input Range - 3 to 21 mA. Differential Input Resistance - 250 Ohms ±0.05%. Differential Input Filter - -52 db @ 60 Hz. Common Mode Input Range - 0 V to +15 V with respect to "common". Common Mode Input Resistance - Greater than 10 meg Ohms. Common Mode Rejection Ratio - Greater than 2000: 1.
SECTION 1
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Frequency Densitometer 1. 2.
Number of Inputs - One Type Input - DC coupled for nominal frequency signal as indicated. ·
· · 3.
Frequency Range - 1000 to 5000 Hz, minimum pulse width of 0.1 ms. · · ·
4.
Solartron device - Square wave 0 to -6 V peak (Requires external capacitive level shifting. Refer to field wiring diagram.) Barton device - Square wave 0 to +15 V peak Agar device - Square wave 0 to +10 V peak
Solartron device - 1000 Hz to 1350 Hz. Barton device - 1500 Hz to 2500 Hz Agar device - 500 Hz to 2000 Hz
Input Resistance - 27 K Ohms.
1.2.2 OUTPUTS A.
0 - 10 Volts Rate - Mass 1.
2. 3.
SECTION 1
Range - Zero to +10.00 V signal, scalable by keyboard entry to represent from 0.00 to N pounds per hour. Absolute maximum range is 0.00 to 10.62 volts. Maximum Load - 5 mA (2 K Ohms, minimum). Response Time - Turbine input to Rate Output - 2 seconds, typical.
5
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER B.
4 - 20 mA Rate - Mass 1.
2. 3.
C.
Density, 0 - 10 V 1.
2. 3. 4.
D.
Range - 0.00 to +10.00 V signal, scalable by keyboard entry to represent X to Y pounds per cubic foot. Absolute maximum range is zero to 10.62 Volts. Maximum Load - 5 mA (2 K Ohms minimum). Response Time, Densitometer input to Density Output 2 seconds, typical (for densitometer mode). Response Time, Temperature and/or Static Pressure Input to Density Output - 4 seconds, typical (for API-2565 mode).
Density, 4 - 20 mA2 1.
2. 3. 4.
6
Range - 4 to 20 mA signal scalable by keyboard entry to represent from 0.00 to N pounds per hour. Absolute maximum range is 4 to 21 mA. Maximum Load Resistance - 900 Ohms (18 V) to common. Response Time - Differential Pressure Input to Rate Output 2 seconds typical.
Range - Four to 20 mA signal, scalable by keyboard entry to represent X to Y pounds per cubic foot. Absolute maximum range is 4 to 21 mA. Maximum Load Resistance - 900 Ohms (18 V) to common. Response Time, Temperature and/or Static Pressure Input to Density Output - 4 seconds, typical (for API-2565 mode). Response Time, Densitometer Input to Density Output 2 seconds, typical (for densitometer mode).
SECTION 1
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ E.
Volume Totals, Contact Closure - Mass 1.
Rating - Form A contact, 30 V DC or AC. 0.75 Amp, 10 VA resistive, 3.5 VA inductive.
________________________________________________________ NOTE:
For inductive loads, the user is responsible for providing resistive/capacitive suppression for the contact. ________________________________________________________ 2. 3. 4. 5.
Scaling - One closure per least significant digit advance of the Station Total Display. Maximum Instantaneous Rate - 25 per second. (See item 5 to determine maximum continuous rate) Duration - 20 ms, nominal. Rate Contact Life · ·
SECTION 1
200,000,000 counts at minimum load. 10,000,000 counts at maximum load.
7
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER F.
Direction Sense Contacts (2) (See option diagram, Figure 2-1). 1.
Rating - Form A contacts, 30 V DC or AC, 0.75 Amp, 10 VA resistive, 3.5 VA inductive. ________________________________________________________ NOTE:
For inductive loads, it is the responsibility of the user to provide arc suppression for the contact. _______________________________________________________ 2.
8
Forward contact closes in response to input differential pressure above low flow cutoff on line 1. Reverse contact closes in response to input differential pressure above low flow cutoff for line 2. For proper operation of direction sense, the bidirectional line must be configured as two separate lines.
SECTION 1
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ G.
Alarm Contact Closure 1.
Rating - Form B contact, 30 VDC or AC, 0.75 Amp, 10 VA resistive, 3.5 VA inductive. _______________________________________________________ NOTE:
For inductive loads, the user is responsible for providing resistive/capacitive suppression for the contact. ________________________________________________________ 2.
H.
Function - Closes to indicate power failure, processor failure, or other alarm condition.
Serial Output 1. 2. 3.
Baud Rate - Selected by operator. Standard rates from 150 to 2400 baud. Type - Ten bits in ASCII serial form. Voltage Levels - RS232C. +12 V to -12 V · ·
4.
I.
Logic 0 - +3 Volts minimum. Logic 1 - -3 Volts minimum.
Character Frequency - Maximum 1 character per 20 msec., regardless of baud rate.
Transducer Power - Regulated +24 VDC, 300 mA. Ripple, 100 mV maximum for 300 mA resistive load.
SECTION 1
9
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 1.2.3 DISPLAYS (Refer to Figure 1-1) A.
Eight-digit Alpha/Numeric 1. 2.
B.
Six-digit mechanical counter without reset for Station Mass totals
C.
Status indicators 1.
2.
3.
10
Sixteen-segment LED. Full 64-character ASCII Code.
Red LED - indicates a current error or alarm condition. This LED is ON if either the Watchdog Timer has timed out or another condition exists. Yellow LED - Indicates that an error condition has occurred since all errors were last cleared via the keyboard even though the error condition no longer exists. Green LED - Indicates that the operator may enter or change data in the computer via the keyboard. The enter/change capability is enabled by placing the enable/disable switch on PC board No.1 in the ENABLE position.
SECTION 1
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________
Figure 1-1. Model 2234 Display
SECTION 1
11
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 1.2.4 CONTROLS A.
Enable/Disable Switch (S1) - Located on PC Board No.1 1.
2.
B.
Keyboard - 24 Keys 1. 2. 3.
12
ENABLE position - Permits the operator to enter or change critical constants or scaling. This does not stop computer calculation. Green LED indicator on front panel. DISABLE position - Prevents using the keyboard to enter or change critical constants or scaling.
Enter (ENTR) - Inputs into memory any valid data shown on the Alpha/Numeric display. Display (DSPY) - Recalls blanked data to the display when operation is in "display timeout" (see paragraph 3.7.1). Numerals, period (.), and minus sign (-) - For entering numerical data or function codes.
SECTION 1
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 4.
5.
6.
7. 8.
SECTION 1
Read (READ) - Entering a one- two- or three-digit function numerical code and pressing READ displays the data being used or calculated by the computer (see Table 3-1). Fixed (FXD) - Pressing FXD displays data stored in the computer by the operator (e.g., pressure, temperature, gravity, etc.). An asterisk displayed with the data identifier indicates that the computer is not currently using the data value for its computations. Variable (VAR) - Pressing VAR displays data from a transducer or a computer calculation. An asterisk displayed with the data identifier indicates that the computer is not currently using the data for its computations. Clear (CLR) - Pressing CLR removes entered data values from the data code displayed and displays "0.0". Command (CMD) - Entering a one- two- or three-digit numerical code and pressing CMD causes the computer to execute the specified command (see Table 3-2). These commands include the display of errors and the resetting of totals. (Totals can be reset only when the green LED is lighted.)
13
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 9.
Up Arrow (↑) - Pressing ↑ results in the following actions by the computer: a.
b.
10. 11.
Reading data - ↑ causes the computer to step back to the previous data code. For example, if the data corresponding to Read Code 2 is being viewed, pressing ↑ causes the computer to display the data corresponding to Read Code 1. Entering data - ↑ indicates to the computer that the data to follow is an exponent (e.g., 2 ↑ 5= 2 x 105=200,000).
Down Arrow (↓) - Causes the computer to step to the next data code. Print (PRNT) - Pressing PRNT sends operator selected data output to an external printer.
1.2.5 ACCURACY A. B. C. D.
14
Low Flow Cutoff - 2% of Full Scale Differential Pressure of lowest range transducers for each tube. Density - determined from the Frequency Densitometer input; ±0.1% of densitometer span for a minimum span of 0.2 LBF3. Rate Determination - is ±0.1% of full scale. Temperature Coefficient for Totals - is 0.005%/F.
SECTION 1
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 1.2.6 OTHER A.
Power ·
Voltage options 1. 2. 3.
·
B.
115 Vac ±10%, 47 to 63 Hz. 230 Vac ±10%, 47 to 63 Hz. 21 Vdc to 29 Vdc.
Power required - (without transducers, current rate outputs and mechanical counter) 10 VA typical, for basic instrument.
Operating Temperature · ·
0oF to 140oF 20oF to 140oF with mechanical counter
C.
Storage Temperature -40oF to 140oF
D.
Humidity 0 - 95%. Non-condensing
E.
Physical Characteristics Dimensions - Industrial Housing, 4" wide x 21 - 5/16" long x 8 - 1/16" high
F.
Weight Approximately 17 pounds
SECTION 1
15
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SECTION 1
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 2.0
INSTALLATION AND INITIAL STARTUP
2.1
GENERAL
This section contains instructions for unpacking and inspecting the computer, handling damage claims, and shipping instructions in the event the computer is to be returned to the factory. In addition, this section contains installation instructions and computer startup procedures. 2.2
UNPACKING
Carefully unpack the computer. Retain all packing materials. Thoroughly inspect the Model 2234 for visual damage. Inspect the power supply at the rear of the chassis, the printed circuit boards and the front panel which contains the pushbutton controls and the LED display monitor. Keep the packing materials until after the computer is put on-line and its operation is checked. 2.3
DAMAGE IN SHIPMENT
If the Model 2234 has been damaged in shipment, first file a claim with the carrier. Next, complete a full report of the damage (its nature and extent) and forward immediately to the factory for further instructions. Include complete model number information. Refer to the Customer Problem Report in the back of this manual.
SECTION 2
17
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 2.4
SHIPPING INSTRUCTIONS
The factory may request that the computer be returned for repair or parts replacement. If so, the Model 2234 must be well packed for the return shipment to prevent further damage to parts and assemblies. Surround the computer with two to three inches of shock absorbing material. Pack it in its original packing materials (if still available) or in a sturdy carton or box. Ship prepaid via the most suitable method. 2.5
INSTALLATION
2.5.1 DETERMINING OPTIONS The model number and option code for the Model 2234 are located on the rear of the instrument when removed from the housing. To determine the options of the instrument, compare the model number and option codes to those in Figure 2-1. ____________________________________________________________ NOTE:
Make certain of the options contained in the instrument before wiring the equipment. Otherwise, damage to the instrument or inaccurate data may result. _____________________________________________________________
18
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________
Figure 2-1. Model Number and Option Codes
SECTION 2
19
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 2.5.2 CASE MOUNTING The Model 2234 Flow Computer is designed primarily to be mounted in an industrial panel cutout. The case is held in place in the panel by jack bars provided with the computer. The panel mounting bezel is provided to cover unfilled space around the computer’s front panel after installation and may or may not be used. See Drawing CE-9117 in the back of this manual. 2.5.3 ACCESS TO PLUG-IN PRINTED CIRCUIT BOARDS Access is gained to the plug-in printed circuit boards by pressing the latch release on the front of the computer and sliding the computer out of the case to the detent position. The "Enable/Disable" switch is located towards the left top-rear of P.C. Board No.1. This allows access to test points, etc. necessary to perform a bench calibration as discussed in Section 4. Turn off power if the computer is to be removed from the case. The power switch is located on the power supply at the rear of the case. Remove the computer from the case by pressing the latch release on top of the computer, pulling it out of the case, and disconnecting the cable at the rear of the computer.
20
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 2.5.4 WIRING THE MODEL 2234 Refer to the Field Wiring Diagram DE-9144 in the rear of this manual for voltage inputs and outputs. Note that all input load resistors are located on the terminal board at the rear of the computer. Ensure the power switch is OFF. ____________________________________________________________ NOTE:
A chassis ground connection to computer common is provided on the rear terminal PC board. Refer to Note 5 on the field wiring diagram when grounding is to be made elsewhere in the system. ____________________________________________________________
Use good instrument wiring practices ensuring that the inputs and outputs are protected against transients. The use of external transient protectors should be considered in areas of high lightning incidence. Transient protectors specifically for Daniel instruments are available from Daniel and, when properly installed, provide excellent protection of the computer from very large transients.
SECTION 2
21
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 2.5.5 CONTROLLING EXTERNAL INDUCTIVE CIRCUITS Externally located inductive circuits may be controlled from the Model 2234 via contact closure outputs. However, an external arc suppression network must be used to prevent radiation of high frequency energy into the circuitry, causing false operation of the computer. _____________________________________________________________ NOTE:
The unit will compute in error with an unsuppressed inductive load connected to the contact closure output. _____________________________________________________________
The contact closure rating is 30 VDC or VAC, 0.75 amperes, not to exceed 10 W resistive, 3.5 W inductive. 2.5.5.1 D-C POWERED CONTACT CLOSURE CIRCUITS Arcing is effectively suppressed in D-C powered circuits by connecting a diode in parallel with the coil to be energized. Ensure that the diode polarity is such that when the coil is in the energized condition, the diode is non-conducting. The diode should have a voltage rating equal to or greater than the external D-C supply voltage. Its current rating should be equal to or greater than the coil energizing current.
22
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 2.5.5.2 A-C POWERED CONTACT CLOSURE CIRCUITS The diode type arc suppression cannot be used when the inductive circuits are powered from an A-C source. Instead, use a series connected resistor and capacitor to suppress the arc. The values of the components of this series network must be selected per supply voltages used, contact ratings, and load characteristics. Connect the series network across the coil. With a supply voltage of 24 VAC, a typical network consists of a 100 Ohm, one-half watt resistor and a 0.02 to 0.05 microfarad capacitor. With a supply voltage of 12 VAC, a typical network consists of a 30 Ohm, one-half watt resistor and a 0.1 microfarad capacitor. _____________________________________________________________ CAUTION: Do not operate 115 VAC circuits via the contact closure outputs of the Model 2234. _____________________________________________________________
After the computer is installed and the wiring checked, proceed with the startup instructions.
SECTION 2
23
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 2.6
STARTUP
2.6.1 GENERAL Upon initial startup, the computer prompts the operator to define and enter the basic operating parameter information necessary for a specific application. These parameters include the system configuration; scaling of pressure, temperature and differential pressure inputs, etc. The operator entry of the startup data is accomplished by a "Startup Prompting Sequence" with the computer displaying each parameter name or mnemonic in succession and the operator entering the required value. A Data Entry Example/Guide, Table 2-1a, is provided as a data entry aid. Complete this form for your usage before beginning the Startup Prompting Sequence. You will normally need to adjust the configuration placed in the unit by the factory to your particular usage. Table 2-1b includes the printer output options and the Frequency Densitometer (if used) Options. No automatic prompting occurs for these options. Note that an internal memory support battery maintains all "startup" parameters in the computer memory for a minimum of 45 days without power input. This prevents repeating the Startup Prompting Sequence after a short-term shutdown or a power failure. Additionally this feature allows the computer to be set up at the factory or elsewhere and then shipped to the field without loss of these key parameters.
24
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________
Figure 2-2. Model 2234 Keyboard
SECTION 2
25
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Apply power to the computer to confirm if the Startup Prompting Sequence has been previously completed. READY indicates that the Startup Prompting Sequence has already been completed and the computer is ready for operation. CNFIG indicates that the Startup Prompting Sequence has not been performed. Slide the computer out of the case to the detent position. Set the internal operator entry "enable/disable" switch on PC Board No.1 to the "enable" position. Confirm that the green "enable" lamp on the front panel is lighted. Refer to paragraph 2.6.2 for assistance in performing the Startup Prompting Sequence. 2.6.2 STARTUP PROMPTING SEQUENCE In the sequence that follows, the mnemonics used by the computer to request data are shown in capital letters. The data required by the computer is entered simply by keying in the required numbers via the front panel keyboard and then pressing the ENTR key. The computer will display OK if the number entered is acceptable. The computer then steps to the mnemonic for the next parameter that is required. If the data entered is improper, the computer will request the parameter again. For ease of data entry, complete the form provided in Table 2-1a of this manual and use it as a guide when performing the startup. A "power-save" feature of the computer causes the display of data or a mnemonic to be replaced by a blinking asterisk (*) one minute after the last operator entry. The data or mnemonic is recalled to the display by pressing DSPY (display).
26
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ A.
CNFIG - Enter the code number for the appropriate system configuration from the following table. RANGE ER (Range Error) is displayed for any other entry.
Configuration Number
Number Meter Tubes
Transducer Type (S)*
1 2 3 4 5 6 7 8 9 10 11
1 2 3 4 5 1 2 2 3 3 4
S S,S S,S,S S,S,S,S S,S,S,S,S D D,S D,D D,S,S D,D,S D,S,S,S
*S = Single Differential Pressure Transmitter D = Dual Stacked Differential Pressure Transmitters
SECTION 2
27
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER B.
28
DENTYP - Enter the appropriate code number for the desired density to be used. RANGE ER is displayed for any other entry. DENTYP Code Number
Density Used
1 2 3 4 5
Analog or no densitometer API 2565 calculated density Frequency densitometer, Solartron type. Frequency densitometer, Barton type Frequency densitometer, Agar type
C.
IE - Enter the Isentropic Exponent (ratio of specific heat); Value must be more than 0.0.
D.
TFS - DEGF - Enter the full scale value for measured temperature in o F.
E.
TZ - DEGF - Enter the zero value for measured temperature in oF.
F.
DFS - LBF3 - Enter the full scale value for measured density in pounds per cubic foot.
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ G.
DZ - LBF3 - Enter the zero value for measured density in pounds per cubic foot.
H.
PFS - PSIA - Enter the full scale value for measured static pressure in PSIA.
I.
PZ - PSIA - Enter the zero value for measured static pressure in PSIA.
J.
MFS - LBHR - Enter the station full scale mass rate in pounds per hour (LBHR).
K.
DOF - LBF3 - Enter the full scale value for the density output in pounds per cubic foot.
L.
DOZ - LBF3 - Enter the zero value for the density output in pounds per cubic foot.
M.
TK - Enter the numerical value of the integer for the Station Totalizing Factor. Acceptable values are -9 to +9. Refer to paragraph 2.6.3.1 for detailed instructions. Pressing only ENTR enters 0 for TK.
SECTION 2
29
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER N.
LFn - Enter line (n) cutoff in inches of water (InH2O) for each line used.
O.
LKn - Enter the numerical value of the integer for the Totalizing Factor of the line (n) indicated by the display. Acceptable values are 9 to +9. Refer to paragraph 2.6.3.1 for detailed instructions. Pressing ENTR enters 0 for LKn.
P.
HFn - H20 - Enter the full scale value, in inches of water, for measured differential pressure in the indicated transducer (HF1, HF2, etc). _______________________________________________________ NOTE:
See Field Wiring Diagram for definition of transducers relative to configuration selected. _______________________________________________________
30
Q.
IDn - Inch - Enter the orifice diameter for the respective line (ID1, ID2, etc.).
R.
ODn - INCH - Enter the orifice diameter of the respective meter tube (OD1, OD2, etc.) in inches.
S.
TLN - Enter the pressure tap location for the respective line (TL1, TL2, etc.). TLN Code Number
Tap Location (from the orifice)
1 2
Upstream Downstream
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ T.
PAn - Enter the Plate Expansion Coefficient for the respective plates (PA1, PA2, etc.).
U.
PTn - Enter Plate Measurement Temperature (DEGF) for the respective plates (PT1, PT2, etc.).
V.
LAn - Enter the Pipe Expansion Coefficient for the respective lines (LA1, LA2, etc.).
W.
LTn - Enter the Pipe Measurement Temperature (DEGF) for the respective lines (LT1, LT2, etc.).
N through W are repeated in succession for each line. After the Startup Prompting Sequence is completed (all of the data required is entered), the computer will display READY to indicate that it can begin flow calculations. However, during initial startup, several alarm conditions will necessarily have occurred since the computer previously has not been programmed. The red lamp indicator on the computer’s control panel indicates an existing alarm condition. The amber light indicator signifies an alarm condition that occurred in the past and has not been acknowledged and cleared by the operator.
SECTION 2
31
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Key on "0" to note and to clear alarms and the alarm memory list. Press and release the CMD key. Note the alarm number on the computer display. Press the CLR key. The alarm is cleared by the computer and the next alarm number is displayed. Continue to clear each alarm until the computer displays READY. If the alarm numbers begin to repeat, the condition(s) causing the alarm(s) still exists and must be eliminated. Refer to Error Code Diagnostic Table 2-5 to determine the possible cause of the alarm and suggested solutions. After all alarm and alarm memory conditions are cleared, both the red and amber indicators will go out. The display will indicate READY. Paragraph 3.5.1 of this manual describes the basic use of operator-entered parameter values and how to enter the values into the computer. Paragraph 3.6 describes the values individually and their acceptable entry limits.
32
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Table 2-1a. Data Entry Example/Guide
Display
Display Definition
Example Measurement Data from Table 2-2
Actual Data to be Entered
Reference
A. CNFIG
Enter system configuration code number
2 ENTR
________
para 2.6.2 (A)
B. DENTYP
Enter densitometer type (1,2,3,4 or 5)
2 ENTR
________
para 2.6.2 (B)
C. IE
Isentropic Exponent
1.3622 ENTR
________
para 2.6.2 (C)
D. ENTER TFS
Enter full scale for measured temperature in oF
150 ENTR
________
para 2.6.2 (D)
E. ENTER TZ
Enter zero scale for measured temperature in oF
50 ENTR
________
para 2.6.2 (E)
F. ENTER DFS
Enter full scale for measured density in pounds per cubic foot
20 ENTR
________
para 2.6.2 (F)
G. ENTER DZ
Enter zero scale for measured density in pounds per cubic foot
0 ENTR
________
para 2.6.2 (G)
SECTION 2
33
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Table 2-1a. Data Entry Example/Guide (Continued)
Display
Display Definition
Example Measurement Data from Table 2-2
Actual Data to be Entered
Reference
H. ENTER PFS
Enter full scale for measured static pressure in PSIA
1000 ENTR
________
para 2.6.2 (H)
I. ENTER PZ
Enter zero scale for measured static pressure in PSIA
0 ENTR
________
para 2.6.2 (I)
J. ENTER MFS
Enter full scale mass for station rate in LB/HR
2.1 ↑ 5 ENTR
________
para 2.6.2 (J)
K. ENTER DOF
Enter full scale density output in LB/CF
20 ENTR
________
para 2.6.2 (K)
L. ENTER DOZ
Enter zero scale density output in LB/CF
0 ENTR
________
para 2.6.2 (L)
M. ENTER TK
Enter station totalizing factor
1 ENTR
________
para 2.6.2 (M)
N. ENTER LF1
LineN cutoff in InH2O for line 1
1 ENTR
________
para 2.6.2 (N)
O. ENTER LK1
Enter totalizing factor for line 1
1 ENTR
________
para 2.6.2 (O)
34
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Table 2-1a. Data Entry Example/Guide (Continued)
Display
Display Definition
Example Measurement Data from Table 2-2
Actual Data to be Entered
Reference
P. ENTER HF1
Enter full scale measured differential pressure for line 1 in inches of water
100 ENTR
________
para 2.6.2 (P)
Q. ENTER ID1
Enter inside diameter of meter tube for line 1 in inches
8.071 ENTR
________
para 2.6.2 (Q)
R. ENTER OD1
Enter orifice diameter of meter tube for line 1 in inches
4 ENTR
________
para 2.6.2 (R)
S. ENTER TL1
Enter pressure tap location for line 1 (1=upstream, 2=downstream)
1 ENTR
________
para 2.6.2 (S)
T. ENTER PA1
Enter plate expansion coefficient for line 1
9.25↑ -6 ENTER
________
para 2.6.2 (T)
U. ENTER PT1
Enter plate measurement temperature for line 1
60.0 ENTER
________
para. 2.6.2 (U)
SECTION 2
35
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Table 2-1a. Data Entry Example/Guide (Continued)
Display
Display Definition
Example Measurement Data from Table 2-2
Actual Data to be Entered
Reference
V. ENTER LA1
Enter pipe expansion coefficient for line 1
6.2↑ -6 ENTER
________
para 2.6.2 (V)
W. ENTER LT1
Pipe measurement temperature for line 1
60.0 ENTER
________
para. 2.6.2 (W)
N. ENTER LF2
Linen cutoff in InH20 for line 2
1 ENTR
________
para 2.6.2 (N)
O. ENTER LK2
Enter totalizing factor for line 2
1 ENTR
________
para 2.6.2 (O)
P. ENTER HF2
Enter full scale measured differential pressure for line 2
100 ENTR
________
para 2.6.2 (P)
Q. ENTER ID2
Enter inside diameter of meter tube for line 2 in inches
8.071 ENTR
________
para 2.6.2 (Q)
R. ENTER OD2
Enter orifice diameter of meter tube for line 2 in inches
4 ENTR
________
para 2.6.2 (R)
36
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Table 2-1a. Data Entry Example/Guide (Continued)
Display
Display Definition
Example Measurement Data from Table 2-2
Actual Data to be Entered
Reference
S. ENTER TL2
Enter pressure tap location for line 2 (1=upstream, 2=downstream)
1 ENTR
________
para 2.6.2 (S)
T. ENTER PA2
Enter plate expansion coefficient for line 2
9.25↑ -6 ENTER
________
para 2.6.2 (T)
U. ENTER PT2
Enter plate measurement temperature for line 2
60.0 ENTER
________
para 2.6.2 (U)
V. ENTER LA2
Enter pipe expansion coefficient for line 2
6.2↑ -6 ENTER
________
para 2.6.2 (V)
SECTION 2
37
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Table 2-1a. Data Entry Example/Guide (Continued)
Display
Display Definition
Example Measurement Data from Table 2-2
Actual Data to be Entered
Reference
W. ENTER LT2
Pipe measurement temperature for line 2
60.0 ENTER
_______
para 2.6.2 (W)
X. READY
The computer is ready for flow computations if further data entries for options are not required. See Table 2-1b. 2-2, and 2-3 for optional data requirements.
38
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Table 2-1b. Data Entry Example/Guide Read Code
Mnemonic
Definition
Data to be Entered
Paragraph Reference
51
P01
PRINT LOCATION
__________
3.8.9
52
P02
PRINT LOCATION
__________
3.8.9
53
P03
PRINT LOCATION
__________
3.8.9
53
P04
PRINT LOCATION
_________
3.8.3
54
P05
PRINT LOCATION
__________
3.9.9
55
P06
PRINT LOCATION
__________
3.8.9
56
P07
PRINT LOCATION
__________
3.8.9
57
P07
PRINT LOCATION
_________
3.8.9
58
P08
PRINT LOCATION
_________
3.8.9
59
P09
PRINT LOCATION
_________
3.8.9
60
P10
PRINT LOCATION
_________
3.8.9
61
P11
PRINT LOCATION
_________
3.8.9
62
P12
PRINT LOCATION
_________
3.8.9
63
P13
PRINT LOCATION
_________
3.8.9
64
P14
PRINT LOCATION
_________
3.8.9
65
P15
PRINT LOCATION
_________
3.8.9
66
P16
PRINT LOCATION
_________
3.8.9
67
P17
PRINT LOCATION
_________
3.8.9
68
P18
PRINT LOCATION
_________
3.8.9
69
P19
PRINT LOCATION
_________
3.8.9
70
P20
PRINT LOCATION
_________
3.8.9
SECTION 2
39
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Table 2-1b. Data Entry Example/Guide (Continued) Read Code
40
Mnemonic
Definition
Data to be Entered
Paragraph Reference
71
P21
PRINT LOCATION
__________
3.8.9
72
P22
PRINT LOCATION
__________
3.8.9
73
P23
PRINT LOCATION
__________
3.8.9
74
P24
PRINT LOCATION
_________
3.8.3
75
P25
PRINT LOCATION
__________
3.9.9
76
P26
PRINT LOCATION
__________
3.8.9
77
P27
PRINT LOCATION
__________
3.8.9
78
P28
PRINT LOCATION
_________
3.8.9
79
P29
PRINT LOCATION
_________
3.8.9
80
P30
PRINT LOCATION
_________
3.8.9
81
P31
PRINT LOCATION
_________
3.8.9
82
P32
PRINT LOCATION
_________
3.8.9
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Table 2-2. Serial Output Option Read Code
Mnemonic
Definition
Data to be Entered
Paragraph Reference
44
DLY
PRINT DELAY Enter 02 to 99 (x100 ms)
__________
3.8.2
45
DTE
DATE (Day of Year) Enter 001-366
__________
3.8.3
46
TIM
CLOCK (in Hours-Minutes) Enter 00-00 thru 23-59
__________
3.8.4
47
DPT
START DAILY PRINT at 00-23 Hours
__________
3.8.5
48
INT
INTERVAL (between printings) 00-24 Hours
__________
3.8.6
49
ID
I.D. No. 000-999
__________
3.8.7
50
BUD
BAUD RATE 150-2400
__________
3.8.8
SECTION 2
41
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Table 2-3. Frequency Densitometer Option Read Code
42
Mnemonic
Definition
Data to be Entered
Paragraph Reference
30
A0
Densitometer Scaling Constant
__________
3.9.3
31
A1
Densitometer Scaling Constant
__________
3.9.3
32
A2
Densitometer Scaling Constant
__________
3.9.3
33
DTC
Densitometer Temperature Correction
__________
3.9.3
34
CT
Densitometer Calibration Temperature
__________
3.9.3
35
PO
Densitometer Pressure Coefficient
__________
3.9.3
36
K
Densitometer Pressure Coefficient
__________
3.9.3
37
DCF
Densitometer Correction Factor
__________
3.9.3
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 2.6.3 SUPPLEMENTARY STARTUP INSTRUCTIONS This subsection is intended as a checklist of possible additional parameter entries or modifications that may be required before placing the computer into service. Where appropriate, references are made to more detailed explanations and information contained in Section 3 of this manual. Prior to placing the computer into service, confirm the values for each measurement parameter (by using the Read Codes described in paragraph 3.6). Note especially that density, pressure, temperature and differential pressure will appear on the display as a varying value (VAR) unless the operator manually enters a fixed (FXD) value. Should a specific transducer be inoperative or be unavailable, a FXD value can be entered manually in lieu of the measured varying value per paragraph 3.5.1. 2.6.3.1 LINE AND STATION TOTALIZING FACTORS The Station or the Line Totalizing Factors may need to be different from the factory-programmed factors of 10o. If so, determine the factors to be used per the following example. Then enter the factors as described in paragraph 3.6.5. The maximum instantaneous pulse rate output allowed by the computer is 25 pulses/second (25 unit volumes in pounds x 1/10, etc.). However, a 25 pulse/second rate shortens the life of the Sodeco RG Series counter to 92.6 days
SECTION 2
43
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER and the relay contacts to between 4.6 and 46.3 days, based on their rated specifications. It is recommended that the maximum long term pulse rate be limited to one per second. This will yield a rated life upwards of 2315 days for the electromechanical counter, and upwards of 115 to 1157 days for the relay contacts. Calculate the required factors per the following example: Assume the system contains two head meters, and that the average flow through each meter is 300 LBH. Each meter flow is totalized in pounds (by using the factory-programmed Line Volume Totalizing Factor of 10o). Each meter will yield 7200 pulses (pounds) per day (300 LBH x 24 hours ÷ 10o). 300 LBH x 24 hour/10o = 7200 Pulses (lbs.) But more resolution is desired and a Line Volume Totalizing Factor of 10-1 is entered (totalizing in tenths of pounds). This will yield 72,000 pulses (tenths of pounds) per day (300 x 24 ÷ 10-1) for each meter, or ten times the number of pulses for a factor of 10. 300 (24)/10-1 = 72000 Pulses (lbs.) However, it is the station volume that drives the computer counter and relays so the station volume rate is of the greatest consequence. In the preceding example where the flow rate through each of two meters is 300 LBH, a factory programmed Station Volume Totalizing Factor of 10o increments the counter 14,400 pulses (pounds) per day (7,200 pulses x 2 meters); a factor of 10-1 increments the counter 144,000 pulses (tenths of pounds) per day. The Station Volume Factor of 10-1 would yield a life of 1,389 days for the counter and life of 69 to 694 days for the relay contacts.
44
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Note that the Line and Station Volume Totalizing Factors are the same (10-1 in the examples above). This does not have to be the case. Different applications may require a Station Totalizing Factor different from the Line Totalizing Factor in order to obtain the best resolution. 2.6.3.2 SETTING UP OPTIONAL FUNCTIONS A.
Serial (Printer) Option:
Read Codes 45 through 82 provide access to all print functions. These Read Codes are inoperable if the print option was not selected with the purchase of the computer. Refer to paragraph 3.8 of the manual for setup and printing instructions. B.
Frequency-type Densitometer Input Option:
The frequency densitometer input option provides for the computer to determine line density from the output of a frequency-type densitometer. Read Codes 30 through 37 allow the operator to enter and read the control parameters. Refer to paragraph 3.9 for set up instructions if this option is being used. Note that the instructions in paragraph 3.9 must be followed to extinguish the red error lamp if the response to DENTYP in the Startup prompting Sequence was 1, 2, 3, 4, or 5.
SECTION 2
45
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER C.
Orifice Measurement of Liquids:
The Model 2234 Mass Flow Computer can be used without modification to measure liquids. The changes and uses of operatorentered parameters are described in paragraph 3.5. 2.6.3.3 ENABLING THE "DISPLAY ALWAYS ON" FUNCTION The operator can cause the computer display to remain ON if desired. Key 1, then press CMD. The display can be returned to the "power-save" timeout mode by keying 2, then pressing CMD. When the instrument startup procedures are complete, set the internal "enable/disable" switch on PC Board No.1 to the "disable" position to prevent unauthorized or accidental data entry. Ensure that the green "enable" indicator lamp on the front panel is OUT.
46
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 2.6.4 EXAMPLE OF STARTUP SEQUENCE Assume that the user’s application is as follows: A.
Number of parallel meter tubes: two, each with single dp transducer.
B.
Flange taps are used, and static pressure is monitored upstream from the orifice.
C.
The product is Ethylene and API-2565 will be used.
D.
Temperature range: 50 to 150oF.
E.
Static pressure range: 0 to 1000 PSIA.
F.
Density output range: 0 to 20 LBF3.
G.
Differential pressure range: 0 to 100 inches of water (each tube).
H.
Line size: D = 8.071 inches actual inside diameter (each tube).
I.
Orifice size: d = 4,000 inches (each orifice).
The subsequent display/keying sequence for the above application is shown in Table 2-4.
SECTION 2
47
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER The related startup sequence is as follows: A.
Apply power to the instrument.
B.
Set the "enable/disable" switch to "enable", and confirm that the green "enabled" lamp is illuminated.
C.
Simultaneously press CMD and CLR to initialize the instrument.
D.
Review the Supplemental Startup instructions of paragraph 2.6.2.
E.
Refer to paragraph 3.7.2 and clear all existing error conditions.
F.
After keying in your sequence, return the "enable/disable" switch to the "disable" position, and confirm that the green "enabled" indicator is extinguished. The instrument is now fully operational and ready for service.
48
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Table 2-4. Typical Startup Sequence
SECTION 2
Display
Key
1. CNFIG 2. DENTYP 3. IE 4. ENTER TFS 5. ENTER TZ 6. ENTER DFS 7. ENTER DZ 8. ENTER PFS 9. ENTER PZ 10. ENTER MFS 11. ENTER DQF 12. ENTER DQZ 13. ENTER TK 14. ENTER LF1 15. ENTER LK1 16. ENTER MF1 17. ENTER ID1 18. ENTER QDI 19. ENTER TL1 20. ENTER PA1 21. ENTER PT1 22. ENTER LA1 23. ENTER LT1 24. ENTER LF2 25. ENTER LK2 26. ENTER MF2 27. ENTER ID2 28. ENTER QD2 29. ENTER TL2 30. ENTER PA2 31. ENTER PT2 32. ENTER LA2 33. ENTER LT2
2 ENTR 2 ENTR 2 ENTR 150 ENTR 50 ENTR 20 ENTR 0 ENTR 1000 ENTR 0 ENTR 2.1 ↑5 ENTR 20 ENTR 0 ENTR 1 ENTR 1 ENTR 1 ENTR 100 ENTR 8.071 ENTR 4 ENTR 1 ENTR 9.25 ↑ -6 ENTR 60.0 ENTR 6.2 ↑ -6 ENTR 60.0 ENTR 1 ENTR 1 ENTR 100 ENTR 8.071 ENTR 4 ENTR 1 ENTR 9.25 ↑ -6 ENTR 60.0 ENTR 6.2 ↑ -6 ENTR 60.0 ENTR
Note
1
2 3
3
49
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 1.
Assuming maximum flow in each line, flowing temperature of 65oF, flowing pressure of 800 PSIA, and density of 8.26 LBF3, the maximum rate is calculated.
2.
A full scale rate of 205,000 pounds per hour is equivalent to 57 pounds per second. The totals register cannot be incremented at a rate in excess of 25 units per second. A Station Totalizing Factor of 101 is selected to yield maximum resolution while limiting the totals register increment rate to 5.7 units per second.
3.
The Line Totalizing Factor is selected for consistency with the station totalizing units (See note 2). This is not required for proper computer operation. However, the line totals cannot be incremented at a rate greater than 1000 units per second.
50
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Table 2-5. Error Code Diagnostic Chart Error Code
Possible Cause
Check
Solution
00 Analog density transducer out of range
1. Densitometer not used.
1. Check VAR value of read code 0 (DEN-LBF3).
1. Place read code 0 in FXD mode. Enter average density (paragraph 3.6.2).
2. Incorrect zero or full scale entered for densitometer.
1. Check values of read codes 12 (DFS) and 13 (DZ).
1. Enter correct full scale and zero values per paragraph 3.6.5.
3. Densitometer output is greater than 102%.
1. If read code 0 value is greater than read code 12;
1. Check wiring. 2. Verify density 3. Check densitometer.
1. If read code 0 value is less than read code 13;
1. Check wiring. 2. Verify density. 3. Check densitometer.
NOTE: Error Code is active if DENTYP is "1".
4. Density out of range, densitometer malfunctioning or miscalibrated, wiring error.
SECTION 2
51
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Table 2-5. Error Code Diagnostic Chart (Continued) Error Code
Possible Cause
Check
Solution
01 Temperature transducer out of range
1. Temperature transducer not used.
1. Check VAR value of read code 1 (flowing temperature).
1. Place read code 1 in FXD mode. Enter average operating temperature (paragraph 3.6.2).
2. Incorrect zero or full scale entered.
1. Check values of read code 5 (TFS) and read code 6 (TZ).
1. Enter correct full scale and zero values per paragraph 3.6.1.
3. Temperature transducer output is greater than 102%.
1. If read code 0 value is greater than read code 5;
1. Check wiring. 2. Verify temperature. 3. Check transducer.
4. Temperature out of range, transducer malfunctioning or miscalibrated, wiring error.
1. If read code 0 value is less than read code 6;
52
1. Check wiring. 2. Verify temperature. 3. Check transducer.
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Table 2-5. Error Code Diagnostic Chart (Continued) Error Code
Possible Cause
Check
Solution
02 Static pressure transducer out of range
1. Pressure transducer not used.
1. Check VAR value of read code 2.
1. Place read code 2 in FXD mode. Enter average operating pressure (paragraph 3.6.2).
2. Incorrect zero or full scale entered.
1. Check values of read code 9 (PFS) and read code 10 (PZ).
1. Enter correct full scale and zero values per paragraph 3.6.1.
3. Pressure transducer output is greater than 102%.
1. If read code 2 value is greater than read code 9;
1. Check wiring. 2. Verify pressure. 3. Check transducer.
4. Pressure out of range, transducer malfunctioning or miscalibrated, wiring error.
1. If read code 2 value is less than read code 10;
1. Check wiring. 2. Verify pressure. 3. Check transducer.
SECTION 2
53
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Table 2-5. Error Code Diagnostic Chart (Continued) Error Code
Possible Cause
Check
Solution
03 Line 1 differential pressure under range
1. Pressure transducer not used for line 1.
1. Check VAR value of read code 261 (H2O).
1. Enter new CONFIG code number.
2. Check code number entered for CONFIG (system configuration), command code 5. 2. Pressure out of range, transducer malfunctioning or miscalibrated, wiring error.
04 Line 2 differential pressure under range
1. Pressure transducer not used for line 2.
1. Check VAR value of read code 262 (H2O).
1. Enter new CONFIG code number.
2. Check code number entered for CONFIG (system configuration), command code 5.
2. Pressure out of range, transducer malfunctioning or miscalibrated, wiring error.
54
1. Check wiring. 2. Verify pressure. 3. Check transducer.
1. Check wiring. 2. Verify pressure. 3. Check transducer.
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Table 2-5. Error Code Diagnostic Chart (Continued) Error Code
Possible Cause
Check
Solution
05 Line 3 differential pressure under range
1. Pressure transducer not used for line 3.
1. Check VAR value of read code 263 (H2O).
1. Enter new CONFIG code number.
2. Check code number entered for CONFIG (system configuration), command code 5.
2. Pressure out of range, transducer malfunctioning or miscalibrated, wiring error. 06 Line 4 differential pressure under range
1. Pressure transducer not used for line 4.
1. Check VAR value of read code 264 (H2O).
1. Enter new CONFIG code number.
2. Check code number entered for CONFIG (system configuration), command code 5.
2. Pressure out of range, transducer malfunctioning or miscalibrated, wiring error.
SECTION 2
1. Check wiring. 2. Verify pressure. 3. Check transducer.
1. Check wiring. 2. Verify pressure. 3. Check transducer.
55
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Table 2-5. Error Code Diagnostic Chart (Continued) Error Code
Possible Cause
Check
Solution
07 Line 5 differential pressure under range
1. Pressure transducer not used for line 5.
1. Check VAR value of read code 265 (H2O).
1. Enter new CONFIG code number.
2. Check code number entered for CONFIG (system configuration), command code 5.
2. Pressure out of range, transducer malfunctioning or miscalibrated, wiring error. 08 Temperature out of range for density calculation NOTE: error code 8 is disabled if 12 CMD is enabled.
56
1. Incorrect or malfunctioning temperature probe being used for computing density calculation.
1. Check wiring. 2. Verify pressure. 3. Check transducer.
1. Check that product temperature is between 65oF and 166.9oF, read code 1
1. Check transducer calibration.
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Table 2-5. Error Code Diagnostic Chart (Continued) Error Code
Possible Cause
Check
Solution
09 Pressure out of range for density calculation
2. Incorrect or malfunctioning pressure probe being used for computing density calculation.
1. Check that pressure is between 200 and 2099.9 PSIA, read code 2.
1. Check transducer calibration.
10 Station volume totals stepping rate is greater than 25 pulses per second
1. Flow rate too high, totalizing factor set too low.
1. Check read code 17 (TK) for proper factor value (paragraph 3.6.5).
1. Enter a corrected totalizer factor per paragraph 2.6.3.1.
11 Invalid ratio of pipe I.D. to orifice diameter
1. Incorrect setting of inside line diameter and/or line orifice diameter.
1. Check value of inside pipe diameter for individual lines, read codes 241, 242, 243, 244 and 245 (paragraph 3.6.3).
1. Enter correct values(s) for pipe I.D. and/or pipe orifice diameter.
2. Check value of line orifice diameter for individual lines, read codes 251, 252, 253, 254 and 255 (paragraph 3.6.3).
SECTION 2
57
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Table 2-5. Error Code Diagnostic Chart (Continued) Error Code
Possible Cause
Check
Solution
12 Excessive mass rate output
1. The full scale mass rate is too high.
1. Check full scale mass rate (read code 11) LBHR.
1. Enter correct full scale value per paragraph 3.6.4.
13 Invalid ratio of line differential pressure to static pressure
1. Setting of full scale value(s) too high for differential line pressure; low zero scale for static pressure
1. Check full scale value of differential pressure for individual lines (read codes 231, 232, 233, 234 and 235) H2O.
1. Enter correct full scale value per paragraph 3.6.1.
14 Abnormal value for line extension factor
1. Setting of full scale value(s) too low for differential line pressure and/or low zero scale for static pressure.
1. Check full scale value of differential pressure for individual lines (read codes 231, 232, 233, 234 and 235) H2O.
1. Enter correct full scale value(s) per paragraph 3.6.1.
2. Check zero scale value of static pressure (read code 10) PSIA
1. Enter correct zero scale value per paragraph 3.6.1.
15 Power failure or watchdog timeout
58
1. The computer has experienced a power failure (and possibly a restart) since errors were last cleared.
1. Enter command code 0 and CLR the error codes.
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Table 2-5. Error Code Diagnostic Chart (Continued) Error Code
Possible Cause
Check
Solution
16 Calculated frequency densitometer output out of range
1. Calculated density greater than density full scale.
1. Check values for R.C.O. and read code 12 (DFS).
1. Enter correct full scale value per paragraph 3.6.5.
2. Calculated density is less than density zero.
2. Check values for R.C.O. and read code 13 (DZ).
2. Enter correct zero scale value per paragraph 3.6.5.
1. Densitometer not used.
1. Check value of read code 12 (DOF-LBF3).
1. Enter correct full scale value per paragraph 3.6.5.
2. Incorrect full scale entered for densitometer.
1. If read code 0 value is less than 12;
17-18 UNUSED 19 Analog density greater than full scale
3. Densitometer output is greater than 102%. 20 Analog density less than zero scale
1. Densitometer not used.
1. Check value of read code 13 (DOZ-LBF3).
2. Incorrect zero scale entered for densitometer.
1. If read code 0 value is less than 13;
3. Densitometer out of range, malfunctioning or mis-calibrated, wiring error.
SECTION 2
1. Check wiring. 2. Verify density. 3. Check densitometer. 1. Enter correct zero scale value per paragraph 2.6.5. 1. Check wiring. 2. Verify density. 3. Check densitometer.
59
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Table 2-5. Error Code Diagnostic Chart (Continued) Error Code
Possible Cause
Check
Solution
21 Line 1 differential pressure over range
1. Pressure transducer not used for line 1.
1. Check VAR value of read code 261 (H2O).
1. Enter new CONFIG code number.
2. Check code number entered for CONFIG (system configuration), command code 5. 2. Pressure out of range, transducer malfunctioning or miscalibrated, wiring error.
22 Line 2 differential pressure over range
1. Pressure transducer not used for line 2.
1. Check VAR value of read code 262 (H20).
1. Enter new CONFIG code number.
2. Check code number entered for CONFIG (system configuration), command code 5. 2. Pressure out of range, transducer malfunctioning or miscalibrated, wiring error.
60
1. Check wiring. 2. Verify pressure. 3. Check transducer.
1. Check wiring. 2. Verify density. 3. Check transducer.
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Table 2-5. Error Code Diagnostic Chart (Continued) Error Code
Possible Cause
Check
Solution
23 Line 3 differential pressure over range
1. Pressure transducer not used for line 3.
1. Check VAR value of read code 263 (H2O).
1. Enter new CONFIG code number.
2. Check code number entered for CONFIG (system configuration), command code 5. 2. Pressure out of range, transducer malfunctioning or miscalibrated, wiring error.
24 Line 4 differential pressure over range
1. Pressure transducer not used for line 4.
1. Check VAR value of read code 264 (H20).
1. Enter new CONFIG code number.
2. Check code number entered for CONFIG (system configuration), command code 5. 2. Pressure out of range, transducer malfunctioning or miscalibrated, wiring error.
SECTION 2
1. Check wiring. 2. Verify pressure. 3. Check transducer.
1. Check wiring. 2. Verify pressure. 3. Check transfer.
61
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Table 2-5. Error Code Diagnostic Chart (Continued) Error Code
Possible Cause
Check
Solution
25 Line 5 differential pressure over range
1. Pressure transducer not used for line 5.
1. Check VAR value of read code 265 (H2O).
1. Enter new CONFIG code number.
2. Check code number entered for CONFIG (system configuration), command code 5. 2. Pressure out of range, transducer malfunctioning or miscalibrated, wiring error.
1. Check wiring. 2. Verify pressure. 3. Check transducer.
26-28 UNUSED 29 Excessive totalized display rate
1. Totalized rate exceeds capacity of buffer accumulator. Flow rate too high, totalizing factor too low.
1. Check station totalizing factor value (TK) per read code 17.
1. Enter a corrected totalizer factor per paragraph 3.6.5.
30 One volt calibration error
1. Possibly 24-volt circuit is out of tolerance.
1. Check voltage on PC Board 1 with a digital voltmeter for 1.000 volt.
1. Adjust 24-volt supply output for 1.000 volt per paragraph 4.2.4.
Check command code 98 for OE4.
2. Perform reference and rate voltage calibrations per paragraphs 4.3.1 and 4.3.2.
62
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Table 2-5. Error Code Diagnostic Chart (Continued) Error Code
Possible Cause
Check
Solution
31 five volt calibration error
1. Possibly 24 volt circuit is out of tolerance.
1. Check voltage on PC Board 1 with a digital voltmeter for 5.000 volt.
1. Adjust 24-volt supply output for 5.000 volts per paragraph 4.2.4.
Check command code 99 for FIC.
2. Perform reference and rate voltage calibrations per paragraphs 4.3.1 and 4.3.2.
SECTION 2
63
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER
This page intentionally left blank.
64
SECTION 2
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 3.0
OPERATION
3.1
GENERAL
This section contains basic calculations performed by the Model 2234 computer, an operational overview, a definition of the types of methods the operator may use to control operating capabilities of the computer, instructions for switching from operator-entered values to computer-calculated values and vice versa; and operating instructions for options available for the Model 2234 computer. 3.2
BASIC CALCULATIONS
Where:
WHn = FBn = FRn Yn K
= = =
HWn = DEN =
SECTION 3
Line hourly mass rate in pounds per hour (LBHR) Instrument calculated or operator entered line basic orifice factor Instrument calculated line Reynolds factor Instrument calculated expansion factor Constant 10LKn, and LKn operator entered line totalizing factor Measured line differential pressure in inches of water Measured or calculated density in pounds per cubic foot
65
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER All instrument calculated factors are computed in accordance the 1991 version of MPMS, Chapter 14.3 (ANSI/API 2530, AGA-3). _______________________________________________________ WHn error is less than 0.01% when process inputs are fixed (operator entered) values. ________________________________________________________ NOTE:
66
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 3.3
OPERATIONAL OVERVIEW
The computer uses a prompting sequence during initial startup. The prompting sequence assists the operator with the entering of essential measurement parameters which the computer requires in determining flow rates and flow totals. Details of the startup procedures are located in paragraph 2.6 of this manual. Once the initial startup is complete, the operator may access data, enter additional parameters, revise previously entered parameters, and request specific computer actions. The two categories of operator control are described as follows. Refer to Tables 3-1 and 3-2, Read Codes and Command Codes. A.
The operator may access or enter specific parameters relating to the data measurement, such as: 1.
Cause the computer to display a specific measurement parameter; (i.e., temperature, flow rate, flow total, etc.).
2.
Substitute a selected value for a measured (varying) or a computed value.
Instructions for accessing data are described in detail in paragraph 3.6.
SECTION 3
67
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER B.
The operator may request the computer to perform three types of action. (NOTE: The "enable/disable" switch must be "enabled" and the green "enable" lamp on the front panel must be ON. 1.
Control the display (ON all the time/ON for one minute);
2.
Display any out-of-tolerance (error) conditions; (See Table 3-3).
3.
Reset flow totals for mass;
Instructions for requesting these actions from the computer are described in paragraph 3.7.
68
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Table 3-1. Read Codes The following table lists all read codes, the display literal, mode capability (fixed/variable), units display, a description and fixed entry limits as applicable for the new version of software. Code Literal 0 1 2 3 4 5 6 7 8 9 10 11 12 13 17 18 29 30 31 32 33 34 35 36 37 42 43 44
DEN TF PF MU IE TFS TZ DFS DZ PFS PZ MFS DOF DZ TK WHT TC A0 A1 A2 DTC CT P0 K DCF A4 A5 DLY
SECTION 3
Mode Units F/V F/V F/V F/V FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD F/V FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD
Description
Fixed limits
LBF3 Density DEGF Measured Temperature PSIA Measured Pressure CP Fluid Viscosity -Isentropic Exponent DEGF Full Scale Temperature DEGF Zero Scale Temperature None LBF3 Density Full Scale LBF3 Density Zero PSIA Pressure Full Scale PSIA Pressure Zero None LBHR Mass Rate Full Scale LBF3 Density Output Full Scale LBF3 Density Output Zero -Station Totalizing Factor LBHR Station Total Mass Rate -Temperature Coefficient -Densitometer Scaling Constant -Densitometer Scaling Constant -Densitometer Scaling Constant -Densitometer Temp. Correction DEGF Densitometer Cal. Temperature None -Pressure Coefficient None -Pressure Coefficient -Densitometer Corr. Factor -Pressure Coefficient -Pressure Coefficient MSEC Printer Line Delay
>0.1 -50 to 250 F 0.0 to 5000 >0.0 >0.0 None None None None >0.0 >0.0 >0.0 -9 to +9 >0.0 None None None None None
None >0.0 None None >0
69
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Table 3-1. Read Codes (Continued) Code Literal
Mode Units
Description
45 DTE 46 TIM 47 DPT 48 INT 49 ID 50 BUD 51 P01 Through 82 P32
FXD -FXD -FXD HOUR FXD HOUR FXD -FXD -FXD --
Day of the Year Time Of Day Daily Print Time Print Interval 3-Digit Computer ID Serial Baud Rate Printed Data Line 1
1 to 366 0 to 23:59 00 to 23 00 to 23 00 to 999 150 to 2400 Valid Code
FXD
--
Printed Data Line 32
Valid Code
F/V FXD FXD FXD FXD FXD F/V F/V F/V F/V FXD F/V FXD FXD FXD FXD F/V F/V VAR VAR VAR VAR
LBHR Line n Hourly Rate InH2O Line n Cutoff -Line n Totalize Factor InH2O Line n DP Full Scale INCH Line n Inside Diameter INCH Line n Orifice Diameter InH2O Line n Differential -Line n Extension -Line n Discharge Coefficient -Line n Expansion Factor -Line n Tap Location -Line n Mass Flow Factor -Line n Plate Alpha DEGF Line n Plate Measure Temp. >0.0 -Line n Pipe Alpha DEGF Line n Pipe Measure Temp. >0.0 -Line n Beta PSIA Line n Upstream Pressure LBHR Station Total Mass Rate LBHR Line n Mass Rate LBS Station Total Mass LBS Line n Total Mass
20n 21n 22n 23n 24n 25n 26n 27n 28n 29n 30n 31n 32n 33n 34n 35n 36n 37n 800 80n 900 90n
70
WHn LFn LKn HFn IDn ODn HWn EXn CDn Yn TLn FMn PAn PTn LAn LTn Bn Pn RATE LT RATE Ln TOTL LT TOTL Ln
Fixed Limits
>0.0 >0.0 -9 to +9 >0.0 >0.0 >0.0 >0.0 >0.0 >0.0 >0.0 1, 2 >0.0 None None >0.0 >0.0
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Table 3-2. Command Code Listing Command Code
Title
Action
Reference Paragraph
0
Display Errors
Causes the consecutive display of errors by Error Code Number
3.7.2
1
Display Always ON
Causes the display to be ON continuously
3.7.1
2
Display Timeout
Causes the display to be ON temporarily, (for one minute) and then be replaced with a blinking asterisk
3.7.1
5
Display Configuration
Causes the display of the configuration type entered during startup
3.7.3
06m
Use Densitometer Input
Selects type of density input for rate and totals calculations
3.7.1
7
Use API-2565
Instructs the computer to use API-2562 density calculation as density input
3.7.1
8
Display Calculation time
Causes the display in seconds of the length of calculations being performed by the computer
3.7.3
12
Disable Error Code 8
Turns OFF low temperature alarm
3.7.1
13
Enable Error Code 8
Turns ON low temperature alarm
3.7.1
14
Display Error Code 8
Causes the display of alarm status for low temperature
3.7.1
15
Clear Print Table
Clears all 32 data locations of the Print Table and replaces with NOT USED
3.8
80n
Gross Total Reset
Resets the flow totals for the station or line (n) selected
3.7.4
SECTION 3
71
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Table 3-2. Command Code Listing (Continued) Command Code
Title
Action
Reference Paragraph
90
Display A/D Channel 0 in Hexadecimal
Causes the display of analog input voltages in hexadecimal form for bench calibration
3.7.2
through 97
Display A/D Channel 7 in Hexadecimal
Causes the display of analog input voltages in hexadecimal form for bench calibration
3.7.2
98
Automatic Calibration of Zero Value to OE4 Hexadecimal
Causes the display of the Zero Value of reference analog circuits
3.7.2
99
Automatic Calibration of Full Scale Value to FIC Hexadecimal
Causes the display of the Full Scale Value of reference analog circuits
3.7.2
72
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Table 3-3. Error Codes Code No. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 19 20 21
SECTION 3
Description Analog density transducer out of range Temperature transducer out of range Static pressure transducer out of range Line 1 differential pressure transducer under range Line 2 differential pressure transducer under range Line 3 differential pressure transducer under range Line 4 differential pressure transducer under range Line 5 differential pressure transducer under range Indicates product temperature is beyond range of API-2565 (i.e., less than 65oF or greater than 166.9oF) Indicates line pressure is beyond range of API-2565 (i.e., less than 200 psia or greater than 2099.9 psia) Total volume incremented faster than 25 HZ Invalid ratio of pipe I.D. to orifice diameter Rate output overscale Ratio of line differential to static pressure greater than 4 Extension less than 5 Power failure of watchdog timeout Frequency density transducer out of range Measured or calculated density is greater than the full scale value entered by the operator Measured or calculated density is less than the zero value entered by the operator Line 1 differential pressure over range
73
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Table 3-3. Error Codes (Continued)
74
Code No.
Description
22 23 24 25 29 30 31
Line 2 differential pressure over Line 3 differential pressure over Line 4 differential pressure over Line 5 differential pressure over Overflow counts exceed 65,000 One volt calibration error Five volt calibration error
range range range range
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 3.4
BASIC KEYBOARD/DISPLAY FUNCTIONS
3.4.1 SELECTING TEMPORARY OR PERMANENT DISPLAY The display of the computer mnemonics and the operator-entered values are temporary during startup. A "power-save" feature is used by the computer to cause the display to remain on for a minute and then be replaced by a blinking asterisk(*). The asterisk indicates that a term or value is in the display memory. Recall the term to the display by pressing the DSPY (Display) key. The temporary display of terms and values can be changed to a permanent display (display always ON) after startup. Press 1, then CMD to cause the display to remain ON. Press 2, then CMD to return the display to the "timeout" mode if desired. 3.4.2 VALIDITY CHECKS OF DATA ENTRIES The computer compares each operator entry with preprogrammed range and format requirements. An unacceptable entry causes the computer to display one of several terms: INVALID, RANGE ER, (Range Error), TOO HIGH, TOO LOW or else to repeat the mnemonic term for the parameter. Enter a new, valid parameter (or Read Code number). The range requirements are described in paragraph 3.6 as part of the instructions for accessing data.
SECTION 3
75
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 3.4.3 FUNCTIONS OF SPECIFIC KEYS The front panel keyboard is arranged in two groups of 12 keys each. The numerical keys, the period (.) and the dash or minus (-) on the left are used to enter data values or issue instructions to the computer through the Read/Command Codes. The group of keys on the right enters functions, changes the display, or initiates a computer action. A summary of the key functions are described as follows. A more detailed description of the functions are described in subsequent paragraphs of this manual. A.
Enter (ENTR) - Inputs into memory any valid data shown on the Alpha/Numeric display.
B.
Display (DSPY) - Recalls blanked data to the display when operation is in "display timeout" (see paragraph 3.7.1).
C.
Numerals, periods (.), and minus sign (-) - For entering numerical data or function codes.
D.
Read (READ) - Entering a one- two- or three-digit function numerical code and pressing READ causes the computer to display the data being used or calculated by the computer (see Table 3-1).
E.
Fixed (FXD) - Pressing FXD displays data stored in the computer by the operator (e.g., pressure, temperature, density, etc.). An asterisk displayed with the data identifier indicates that the computer is not currently using the data value for its computations.
76
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ F.
Variable (VAR) - Pressing VAR displays data from a transducer or a computer calculation. An asterisk displayed with the data identifier indicates that the computer is not currently using the data for its computations.
G.
Clear (CLR) - Pressing CLR removes entered data values from the data code display and displays "0.0".
H.
Command (CMD) - Entering a one-, two- or three-digit numerical code and pressing CMD causes the computer to execute the specified command (see Table 3-2). These commands include the display of errors and the resetting of totals. (Totals can be reset only when the green LED is lighted).
I.
Up Arrow (↑) - Pressing ↑ results in the following actions by the computer: 1.
Reading data - ↑ causes the computer to step back to the previous data code. For example, if the data corresponding to the Read Code 2 is being viewed, pressing ↑ causes the computer to display the data corresponding to Read Code 1.
2.
Entering data - ↑ indicates to the computer that the data to follow is an exponent (e.g., 2 ↑ 5 = 2 x 105 = 200,000).
J.
Down Arrow (↓) - Pressing ↓ causes the computer to step forward to the next data code; reverses the action in ↑.
K.
Print (PRNT) - Pressing PRNT initiates operator selected data output to an external printer.
SECTION 3
77
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 3.4.4 INDICATORS Indicators other than the keyboard and LED display consist of three status indicators and an optional six-digit electromechanical counter on the front panel. The three colored status indicators show the status condition of the total system. The red indicator is ON when an out-of-tolerance (error) condition exists (e.g., a transmitter over-ranges) and is OFF when the condition ceases to exist. The amber indicator is ON when the out-of-tolerance condition, which causes the red indicator to light, is entered by the computer into the error memory list. The amber indicator remains lighted until all error conditions have ceased and the operator has cleared the error memory list as described in paragraph 3.7.2. The green indicator is ON when the operator entry "enable/disable" switch on PC Board No.1 is in the "enable" position. The green indicator being ON indicates that the operator can enter or alter any of the respective measurement parameters when the operator entry "enable/disable" switch, in the "disable" position, causes the computer to display ENABLE at any attempt by the operator to enter or alter the measurement parameters. The operational six-digit electromechanical counter on the front panel displays the gross, net, or mass flow total that is selected during the Startup Prompting Sequence.
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MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 3.5
DATA INPUT AND OVERRIDING CONTROLS
The values of the parameters used by the Model 2234 are derived from two sources. A.
Line parameter measurements being monitored by the computer, or calculations performed by the computer, are called variable or VAR values since they change as line or calculation conditions change.
B.
Operator-entered parameter values are called fixed or FXD values since they do not change. Some parameters can be only a measured or a calculated value, some can be only an operator-entered value, and some parameters can be either a measured or an operator-entered value. Only one value can be actively used in the computer computations. The operator can select and switch to whichever type of value (measured/calculated or operator-entered) that is to be active. Generally, an operator-entered parameter value is used in lieu of a measured value when a problem occurs, such as when a line transmitter is malfunctioning and is being removed for repair or replacement. When the operator enters an access data code (Read Code) into the computer, the display shows the type parameter value that is currently active. Press the FXD or VAR key for the alternate value type to display the value of the inactive parameter. Note that the inactive value is indicated by an asterisk (*) located between the parameter mnemonic and the term, FXD or VAR, e.g., "TF * FXD".
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79
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 3.5.1 ENTERING AN OPERATOR - SELECTED VALUE Set the "enable/disable" switch on PC Board No.1 to the "enable" position in order to enter parameter values. Return the switch to the "disable" position after making entries to prevent unauthorized or accidental data entries. Verify the value entered into the computer during startup. Press the data code access number(s) (Read Code) and then READ. If the measured value is being used by the computer, press FXD to display the operator-entered value being held inactive. Enter the desired value. Press ENTR. The display will show OK to indicate that the value is within the acceptable range, then will show the parameter mnemonic, the units of measurement, and finally the value that was entered. 3.5.2 SWITCHING MEASURED - VALUES AND OPERATOR - ENTERED VALUES A.
Assume that the temperature transducer in the line is suspected of malfunctioning. Assume also that the transducer will need to be removed for repair while the system is flowing. First examine the transducer output. The Read Code for monitoring a temperature transducer is 1 in this example. Key
Display
1 (Basic Read Code) 1 READ (Pressed) TF VAR (Variable) READ (Released) DEGF (Units of Measure) then 56.3 (Temperature)
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SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ B.
Next, assume that the temperature for the line is known to be approximately 78 degrees (the VAR 56.3 degree temperature reading verifies that the transducer output is inaccurate) so a 78 degree temperature will need to be entered into the computer as a FXD value for the computer to use in its calculations until the defective transducer can be returned to service. Examine the current inactive FXD value:
C.
Key
Display
FXD (Pressed) FXD (Released)
TF * FXD (Fixed) DEGF (Units of Measure) then 0.00
The asterisk (*) between TF and FXD indicates that this value is not active (not being used by the computer for flow computations). Instead, the computer is using the 56.3 VAR output from the defective transducer. The current FXD value is "0.00". Enter a new FXD value of 78 degrees Key
Display
7 8 ENTR
7 78 TF * FXD (Fixed) DEGF (Units of Measure) then 78.0
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81
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER D.
Switch the value of the temperature from VAR to FXD. Press ENTR again. Key
Display
ENTR (Pressed) TF FXD ENTR (Released) OK (Valid Entry) then DEGF (Units of Measure) then 78.0 The value being displayed (VAR or FXD) is entered into the computer calculations by pressing ENTR. (In the example above, FXD was the last value type displayed before pressing ENTR to enter the 78 degrees, so ENTR was pressed twice; once to enter the temperature as the inactive FXD value and a second time to enter the inactive FXD value into the computer as the active value). Note that the display of TF FXD contains no asterisk, signifying that the FXD value is now the active value being used for flow computations.
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MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ E.
Next, assume that the transducer is repaired or replaced and is ready to be returned to use. Switch the temperature from the active FXD value to the inactive VAR value. Enter the appropriate Read Code (1 in this example) to view the value being used. The display will show that it is the 78 degree FXD value entered previously. Next, view the current VAR value: Key
Display
VAR (Pressed) TF VAR (Variable) VAR (Released) DEGF (Units of Measure) then 76.4 Note that for the example, the VAR value is now 76.4 degrees and the asterisk signifies that the value is not active (not being used for flow computation). Press ENTR to make VAR the active value: Key
Display
ENTR
TF VAR (Variable) then OK then DEGF (Units of Measure) then 76.4
OK signifies that the entry of the VAR value was accepted and the absence of the asterisk indicated that the VAR value is now being used for flow computations.
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83
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 3.6
DATA ACCESS
As stated in the Operational Overview part of this section of the manual, the operator may access data in the computer for one of two type actions: A.
To display a specific measurement parameter, flow rate or flow totals;
B.
To substitute an operator-entered (FXD) value for a measured (VAR) value as described in paragraph 3.5 (set the "enable/disable" switch to the "enable" position). Operator accessible data are described below by groups as they apply to different operational functions. A numerical listing of the related access codes (Read Codes) appears in Table 3-1. A code-by-code description of the Read Codes appears in Appendix A at the back of this manual. Data request group descriptions appear in the following order, starting in paragraph 3.6.1: A. B. C. D. E. F.
Transducer Scaling. Measurements. Operator Entered Data Constants Computer Calculated Variables. Output Scaling. Overrides.
Other operational functions are described elsewhere in this manual. Refer to the Table of Contents to determine their location.
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MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 3.6.1 TRANSDUCER SCALING Read Codes for transducer scaling will display the full scale and zero values that are used by the computer to scale measured input signals from the respective transducers. Transducer scaling is displayed only as FXD values. The values may be changed by the operator by keying in the new values and pressing ENTR. A.
Temperature Transducer Full Scale (TFS) - Read Code 5 Temperature Transducer Zero (TZ) - Read Code 6 Full scale and zero temperature values, used by the computer to scale input signals from the temperature transducer, are displayed by using Read Codes 5 and 6. Temperature is displayed in degrees Fahrenheit.
B.
Densitometer Full Scale (GFS) - Read Code 7 Densitometer Zero (GZ) - Read Code 8 Full scale and zero density values, used by the computer to scale input signals from the analog densitometer, are displayed by using Read Codes 7 and 8. Density values are displayed in LBF3 (pounds per cubic foot).
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85
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER C.
Static Pressure Transducer Full Scale (PFS) - Read Code 9 Static Pressure Transducer Zero (PZ) - Read Code 10 Full scale and zero pressure values, used by the computer to scale input signals from the pressure transducer, are displayed by using Read Codes 9 and 10. Pressure is displayed in PSIA.
D.
Line Differential Pressure Full Scale (HFn) - Read Code 23n
The full scale line differential pressure, used by the computer to scale pressure differential in line number (n), is displayed by using Read Code 23n. Pressure is displayed in inches of water. FXD values greater than zero are acceptable. Refer to Field Wiring Diagram, DE-9144, for the definition of the transducer per configuration selected. 3.6.2 MEASUREMENTS Read Codes for measurements display measured input values used by the computer in calculation of the flow rates and flow totals. Measurements are displayed as VAR values. The values may be changed to a FXD value by the operator. Refer to paragraph 3.5.2. A.
Measured Density (DEN) - Read Code 0
The measured specific density value, used by the computer to calculate flow rates and flow totals in accordance with API-2565, is displayed by using Read Code 0. The density is displayed in pounds per cubic foot (LBF3). FXD values greater than 0.1 are acceptable.
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MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ B.
Temperature (TF) - Read Code 1
The measured temperature value, used by the computer to calculate flow rates and flow totals, is displayed by using Read Code 1. The display is in degrees Fahrenheit. FXD values between -50 and 250 degrees Fahrenheit are acceptable. C.
Static Pressure (PF) - Read Code 2
The measured static pressure value, used by the computer to calculate flow rates and flow totals, is displayed by using Read Code 2. The pressure is displayed in PSIA. FXD values between 0.0 and 5000 PSIA are acceptable. D.
Line Differential Pressure (HWn) - Read Code 26n
The pressure differential, used by the computer to calculate mass rates and mass totals, is displayed by Read Code 26n for the line selected (n). Pressure is displayed in inches of water. FXD values between 0 and 1000 inches of water are acceptable for testing purposes only.
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87
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 3.6.3 OPERATOR-ENTERED DATA CONSTANTS Read Codes for operator-entered data constants display the values of those data which generally remain constant. Data such as orifice diameter, line ID, and line tap location are displayed as FXD values. The values may be changed by the operator by keying in new values and pressing ENTR. A.
Line Inside Diameter (IDn) - Read Code 24n The line inside diameter, used by the computer for calculating line mass flow, is displayed for line number (n) by using Read Code 24n. The value is displayed in inches. FXD values between 1.0 and 50.0 inches are acceptable.
B.
Line Orifice Diameter (ODn) - Read Code 25n The line orifice diameter value, used by the computer for calculating mass flow, is displayed for line number (n) by using Read Code 25n. The value is displayed in inches. FXD values between 0.2 and 40 inches are acceptable.
C.
Line Tap Location (TLn) - Read Code 30n The location of the line tap for the selected line number (n) is displayed by using Read Code 30n. The display will show 1 (upstream) or 2 (downstream).
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MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 3.6.4 COMPUTER CALCULATED VARIABLES Read Codes for the computer calculated variables cause the display of the values computed from various other calculations. All computer calculated variables are displayed as VAR values. A.
Mass Rate Full Scale (MFS) - Read Code 11 The full scale mass rate, related to the analog mass rate output, may be displayed by using Read Code 11. The rate is displayed in LBHR. Only FXD values are accepted by the computer.
B.
Total Hourly Mass Rate (WHT) - Read Code 18 The total current hourly mass rate may be displayed by using Read Code 18. The rate is displayed in LBHR FXD values from 0.0 and above may be entered for testing purposes only. FXD value entries will affect flow totals if the computer is on-line.
C.
Line Hourly Flow Rate (WHn) - Read Code 20n The hourly flow rate of a selected line number (n) may be displayed by using Read Code 20n. The rate is displayed in LBHR. FXD values from 0.0 and above may be entered for testing only. FXD value entries will effect flow totals if the computer is on-line.
D.
Line Cutoff Factor (LFn) - Read Code 21n This is the operator entered differential value (InH20) below which the flow computer will assume a flow rate of zero.
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89
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER E.
Line Extension (EXn) - Read Code 27n The extension factor for a selected line number (n), used by the computer to calculate the Reynolds factor for the line, may be displayed by using Read Code 27n. The line extension display is the square root of (HWn x PF). FXD values of any positive real number can be entered for test purposes only. FXD value entries will affect flow totals if the computer is on-line.
F.
Line Discharge Coefficient (CDn) - Read Code 28n The discharge coefficient is calculated by the flow computer in accordance with procedure 3.2.9 of Chapter 14.3.4 of the Manual of Petroleum Measurement Standards, May 6, 1991. FXD values from 0.0 and above may be entered for testing purposes only.
G.
Line Expansion Factor (Yn) - Read Code 29n The expansion factor for a selected line number (n) may be displayed by using Read Code 29n. FXD values from 0.0 and above may be entered for testing purposes only. Typical values may be between 0.87 and 1.04.
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MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ H.
Mass Rate (RATE Ln) - Read Code 80n
Read Code 80n is used to display the mass flow rate as measured through the line selected where n = 1, 2, 3, 4, or, 5 through the station (n = 0). Flow rate is displayed as a VAR value. A typical mass flow rate Read Code entry and display is shown as follows: Key
Display
8 0 (Base Read Code) 1 (Line No.) READ (Pressed) READ (Released)
8 80 801 TOTAL L1 LBHR E0 then 00000000
Line 1 (Base unit of measure) [A power of ten (totalizing factor) that is multiplied by the base unit of measure, i.e., LBHR times 10 to the zero power (E0) = LBHR times 1.]
Line and Station Identification LT L1 L2 L3 L4 L5
SECTION 3
= = = = = =
Station Line 1 Line 2 Line 3 Line 4 Line 5
91
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER I.
Mass Total (TOTAL Ln) - Read Code 90n
Read Code 90n displays mass flow totals through the selected line number (n), where n = line 1, 2, 3, 4, or 5 through the station (n = 0). Flow totals are displayed as a VAR value. A typical flow total Read Code entry and display is shown as follows:
Key
Display
9 0 (Read Code) 1 (Line No.) READ (Pressed) READ (Released)
9 90 901 TOTAL L1 LBS E0 then 00000000
Line 1 (Base unit of measure) [A power of ten (totalizing factor) that is multiplied by the base unit of measure, i.e., LBS times 10 to the zero power (E0) = LBS times 1.]
Line and Station Identification LT L1 L2 L3 L4 L5
92
= = = = = =
Station Line 1 Line 2 Line 3 Line 4 Line 5
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MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 3.6.5 OUTPUT SCALING Read Codes are used to display the analog output scaling for full scale and zero density; the totalizing factor for mass; and the totalizing factor for line mass. All output scaling is displayed only as FXD values. The operator may change the scaling rates and totalizing factors by keying in the values and pressing ENTR. A.
Density Output Full Scale (DOF) - Read Code 12 Density Output Zero (DOZ) - Read Code 13 The full scale and zero values for the density analog output may be displayed by using Read Codes 12 and 13. Display is in LBF3.
B.
Station Totalizing Factor (TK) - Read Code 17 A power of ten multiplier (the totalizing factor) that is being applied to the station totalization is displayed with the use of Read Code 17. FXD entry of integer exponent values between -9 and +9 are acceptable (refer to paragraph 2.6.3.1 for details pertaining to totalizer scaling). The value may be changed by the operator keying in the values and pressing ENTR. If no exponent is entered to factor the totals, the computer uses a totalizing factor of 10o.
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93
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER C.
Line Totalizing Factor (LKn) - Read Code 22n A power of ten multiplier (the totalizing factor) that is being applied to the total of the selected line (n), is displayed with the use of Read Code 22n. The operator may enter exponent values between -9 and +9 (refer to paragraph 2.6.3.1 for details pertaining to totalizer scaling). Key in the values and press ENTR. If no exponent is entered to factor the totals, the computer uses a totalizing factor of 10o.
3.6.6 OVER-RIDES Calculation required for product other than mass flow will need to be entered into the computer as FXD values by the operator. (Refer to paragraph 3.10).
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MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 3.7
COMPUTER ACTION REQUESTS
As stated in the Operational Overview portion of Section 3 of this manual, the operator may cause the computer to perform one of four types of action: A.
Controlling the display (ON all the time/ON for one minute);
B.
Calling for the computer to display any out-of-tolerance (error) conditions; and
C.
Resetting flow totals.
For user convenience, the computer actions are described by groups as they apply to different operational functions. A numerical listing of the Command Codes appear in Table 3-2. Set the "enable/disable" switch to the "enable" position to perform all actions, except as noted for each specific Command Code. The group descriptions appear in the following order, starting in paragraph 3.7.1: A.
Operational Actions
B.
Diagnostic Aid Actions
C.
Parameter Display Actions
D.
Clearing Actions Other operational functions are described elsewhere in this manual. Refer to the Table of Contents to determine their location.
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95
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 3.7.1 OPERATIONAL ACTIONS Command Codes pertaining to the computer operation are used to change or control the computer operation after initial startup. A.
Display Always ON - Command Code 1 Display Timeout - Command Code 2 Command Code 1 causes the display to be ON continuously. Command Code 2 causes the display to be ON for one minute and then to go off with the displayed terms replaced by a blinking asterisk(*).
B.
Use Densitometer Input - Command Code 06 Use Densitometer Input - Command Code 06m The computer contains only one of the 06 Command Codes for densitometer input. Refer to the program option. Command Code 06 instructs the computer to use the analog densitometer input, or the operator-entered FXD value if no densitometer is used, for rate and totalization calculations. The computer will acknowledge this Command Code only if the "enable/disable" switch is in the "enable" position (green LED illuminated). m m m m m
96
= = = = =
1 2 3 4 5
Analog or no densitometer API-2565 Frequency, Solartron type Frequency, Barton type Frequency, Agar type
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ C.
Use API-2565 - Command Code 7 Command Code 7 instructs the computer to use density as calculated from temperature and pressure in the rate and totalization calculation. The computer will acknowledge this command code if the "enable/disable" switch is in the "enable" position (green LED illuminated).
D.
Disable Error Code 8 - Command Code 12 Command Code 12 deactivates sensing for and turns OFF the Low Temperature Alarm (Error Code 8). The computer will acknowledge this command code even if the "Enable Disable" switch is in the "Disable" position.
E.
Enable Error Code 8 - Command Code 13 Command Code 13 initiates sensing the Low Temperature Alarm (Error Code 8). The computer will acknowledge this command even if the "Enable/Disable" switch is in the "Disable" position.
F.
Display Error Code 8 - Command Code 14 Command Code 14 causes the computer to display the status of the Low Temperature Alarm (Error Code 8). The display is shown as ER8 ENA if the alarm is enabled; as ER8 DIS if the alarm is disabled. The computer will acknowledge this command even if the "Enable/Disable" switch is in the "Disable" position.
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97
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 3.7.2 DIAGNOSTIC AID ACTIONS Diagnostic Aid Actions enable the operator to visually monitor or verify suspected problem areas. All of the Diagnostic Aids, except Command Code 0, are used only in bench calibrations and tests. A.
Display Errors - Command Code 0 The red status indicator on the front panel is ON when an out-of-tolerance (error) condition occurs, and turns OFF when the error condition ends. Refer to Error Code Table 3-3 for possible error causes and solutions. The amber status indicator on the front panel is ON to indicate that the error condition has been entered into the computer error memory, even if the error no longer exists. The amber indicator remains ON until the operator clears the memory list. The computer will acknowledge this command even if the "Enable/Disable" switch is in the "Disable" position. Command Code 0 displays the list of errors in memory in numerical sequence. Press CLR to acknowledge and clear an error from the memory list. The computer automatically advances the display to the next error number. When the error conditions no longer exist, and when all of the error codes in the memory list have been acknowledged, the amber status light turns OFF.
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MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ B.
Display Display Display Display Display Display Display Display
A/D A/D A/D A/D A/D A/D A/D A/D
Channel Channel Channel Channel Channel Channel Channel Channel
0 1 2 3 4 5 6 7
in in in in in in in in
Hexadecimal Hexadecimal Hexadecimal Hexadecimal Hexadecimal Hexadecimal Hexadecimal Hexadecimal
-
Command Command Command Command Command Command Command Command
Code Code Code Code Code Code Code Code
90 91 92 93 94 95 96 97
Command Codes 90 through 97 display analog input voltages in hexadecimal form for bench calibrations and software diagnostic testing. They are not applicable for field use. C.
Automatic Calibration of Zero Value to 0E4 Hexadecimal - Command Code 98 Automatic Calibration of Full Scale Value to F1C Hexadecimal - Command Code 99 Command Codes 98 and 99 display the zero and full scale values of reference analog circuits in the computer, as described in paragraph 4.3, Field Calibration.
D.
Memory Diagnostics for the Model 2234 Computer The Model 2234 contains two types of memory circuits. RAM (Random Access Memory) integrated circuit (IC) chips are used to store the calculated rates and totals, as well as other data which changes value. PROM (Programmable Read Only Memory) IC’s are used to permanently hold the unchanging program instructions that calculate the data values stored in RAM.
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99
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER The Model 2234 performs diagnostic checks on both the RAM and the PROM memories to insure the reliability of the calculations performed and the safe storage of the resulting data. If a memory failure occurs, the system halts all flow calculations because their reliability would be uncertain. A diagnostic message is displayed on the front panel in the form MEM XX00 where XX is the starting address of the memory IC chip which has failed. Table 3-4 shows the relation of the address displayed to actual IC chips. The RAM memory diagnostic check is run during the initialize sequence, after the operator has simultaneously pressed both the CMD and CLR keys to clear all memory and start a configuration (CNFIG) prompting sequence. The PROM memory diagnostic check is run every ten seconds during normal use of the computer. The diagnostic test runs successfully even if all RAM memory fails and nearly all PROM memory fails. All that is required is that the small section of PROM memory containing the diagnostic routines be operable. If this portion of memory fails, the system "watchdogs" (causing the indicator lights on the front panel to blink) halts further processing. Even though the system ceases to calculate rates and totals upon detecting a memory failure, the diagnostic test continues to run. If the memory checks out good on the next pass, the system is allowed to resume processing as if a temporary power failure has occurred. In the event of PROM memory failure, all measurement data is maintained in RAM memory. To access this information, correct the PROM memory problem by replacing the defective chip.
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MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Table 3-4. Address vs. IC Chip (DE-8992 series) Addressed Displayed
Type of Memory
On PC Board Number
I C Number
none
PROM
1
0800 1000 1800 2000 2800
PROM PROM PROM PROM PROM
1 1 1 1 1
U12 (Failure causes watchdog) U3 U13 U4 U14 U5
7000 7400 7800 7C00
RAM RAM RAM RAM
1 1 1 1
U19 U24 U31 U37
8000 8800 9000 9800 A000 A800 B000 B800
PROM PROM PROM PROM PROM PROM PROM PROM
2 2 2 2 2 2 2 2
U11 U12 U15 U16 U17 U19 U20 U21
SECTION 3
AND AND AND AND
U20 U25 U32 U38
101
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Table 3-4A. Address vs. IC Chip (DE-10421 series)
102
Addressed Displayed
Type of Memory
On PC Board Number
I C Number
none
PROM
1
0800 1000 1800 2000
PROM PROM PROM PROM
1 1 1 1
U12A (Failure causes watchdog) U3A U13A U4A U14A
7000 7400 7800 7C00
RAM RAM RAM RAM
1 1 1 1
U19 U24 U31 U37
8000 8800 9000 9800 A000 A800 B000 B800
PROM PROM PROM PROM PROM PROM PROM PROM
2 2 2 2 2 2 2 2
U11 U12 U15 U16 U17 U19 U20 U21
AND AND AND AND
U20 U25 U32 U38
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MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 3.7.3 PARAMETER DISPLAY ACTIONS The parameter display Command Codes used to display the values of parameters set into the computer during initial startup. A.
Display Configuration - Command Code 5
The type configuration entered by the operator during initial startup may be displayed with the use of Command Code 5. The display of the configuration appears as shown below when Command Code 5 is entered into the computer. CONFIG then CFG y z where: x
=
y
=
z
=
SECTION 3
Density type (DENTYP) selected DENST A for analog densitometer API 2565 for API calculated DENST Fw for frequency densitometer input (w = Level 1, 2, or 3) Number of meter tubes and their stack configuration Tap Type being used FT for Flange Tap
103
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER The configuration type can be changed only by erasing all startup parameters from memory and repeating the Startup Prompting Sequence as described in paragraph 2.6. Erase the startup parameters by simultaneously pressing CMD and CLR. B.
Display Calculation Time - Command Code 8
The length of the calculation currently being performed by the computer is displayed by using Command Code 8. The display is in seconds.
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MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 3.7.4 CLEARING ACTIONS A.
Mass Total Reset - Command Code 80n The mass flow totals related to the selected line number (n) where n = 1, 2, 3, 4, or 5, or to the station (n=0), are reset by the use of Command Code 80n. A typical line total reset is entered and displayed as in the following example: Key
Display
8 0 (Basic Command Code) 1 (Line No.) CMD
8 80
ENTR
OK then READY
801 Clear L1
(Gross Total Reset Line 1)
Line and Station Identification LT L1 L2 L3 L4 L5
SECTION 3
= = = = = =
Station Line 1 Line 2 Line 3 Line 4 Line 5
105
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 3.8
SERIAL OUTPUT FOR PRINTING
The Serial Output Option allows the operator to output the process information stored in computer memory to an off-line printer in serial form. Access to all print functions is provided by Read Codes 44 through 82. A calendar/clock keeps track of days, hours, and minutes, permitting fully automatic printout in addition to either local keyboard or remote contact closure commands. Temporary memory storage locations are used when storing data to be printed, thereby eliminating any significant time skew of data due to speed limitations of the printer.
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MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Table 3-5. Serial Output Read Read Code and Mnemonic Identifier
Read Code Description
Reference Paragraph
44-DLY 45-DTE 46-TIM
Print delay Date - day of year Real time clockhours/minutes Data print time-hour of day Print interval-hour Printed identification number Printed baud rate-bit rate Print location 01-data * Print location 02-data * Print location 03-data *
3.8.2 3.8.3
47-DPT 48-INT 49-ID 50-BUD 51-P01 * 52-P02 * 53-P03 *
3.8.4 3.8.5 3.8.6 3.8.7 3.8.8 3.8.9 3.8.9 3.8.9
through Print location 32-data *
3.8.9
* Data may be: A. B. C.
Any valid Read Code. Blank line by entering "-" which is the keyboard negative symbol, will provide single line spacing between data groups. "NOT USED". If no entry is made, that line is omitted during printout.
A double negative "-" entry may be used to delete single entries and replace with "NOT USED". All 32 locations of the Print Table are cleared and loaded with "NOT USED" by using Command Code 15. Read Codes 45 through 50 are unaffected by this function.
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107
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 3.8.1 READ CODE USAGE Read Codes (Tables 3-1 and 3-5) allow the operator to display or enter measurement parameters to be printed. The internal "enable/disable" switch must be set to the "enable" position before entering new values. Subsequently, the switch should be returned to the "disable" position after entering values to prevent unauthorized or accidental data entry. 3.8.2 DELAY (DLY) - READ CODE 44 The print delay is displayed in milliseconds (X100) by using Read Code 44. The delaying time is used by the computer to allow the printer to return carriage for the next line of data to be printed. FXD values between 2 and 99 (X100) are acceptable. The delay time defaults to 2 if no value is entered. Such a delay is required for proper interface with printers which do not incorporate memory. Consult the printer operation manual to determine if a delay is required and if so, how much. Example: A delay time of "5" is entered by the operator. The carriage return time, then, is approximately 500 milliseconds of "5" X 100. 3.8.3 DATE (DTE) - READ CODE 45 The day of the year is displayed according to the Julian Calendar by using Read Code 45. Acceptable operator entry values are 001 through 365, (preceding zero values are not mandatory). If the day entered is 366, the unit will roll over to 0.
108
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MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 3.8.4 REAL TIME CLOCK (TIM) - READ CODE 46 The hour and minute entries are displayed by using Read Code 46. Hour entries always precede minute entries and must be separated by a "-" operator key entry. Hours are displayed according to the National Bureau of Time Standard, where 5 p.m. is represented as the 17th hour and so would be entered at 17. Seconds are not displayed. However, the internal seconds register is reset to zero with each new time entry. Acceptable operator entry values for hours and minutes are 00 -00 through 23 - 59. 3.8.5 DAILY PRINT TIME (DPT) - READ CODE 47 The time of the first daily printout is displayed in hours by using Read Code 47. Acceptable operator entry values are 00 through 23. 3.8.6 PRINT INTERVAL (INT) - READ CODE 48 The time increment between successive printout initiations from paragraph 3.8.4 and extending over a 24 hour period is displayed by using Read Code 48. Example: Time of the first printout (Read Code 47) is set for 06 hours. The interval time between successive printouts (Read Code 48) is set for 05 hours. Print times are: 06, 11, 16, 21, 02 06, 11, 16, 21, 02 etc, hours If both the print time and the interval time are set to 00, no automatic printout occurs. Acceptable operator entries are 00 through 24.
SECTION 3
109
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 3.8.7 IDENTIFICATION (ID) - READ CODE 49 Read Code 49 displays the computer numerical identification. Acceptable operator entries are 000 through 999. 3.8.8 BAUD RATE (BUD) - READ CODE 50 Read Code 50 displays the selected baud rate. Baud refers to the time period of transmission of either a "1" or "0" bit. Acceptable operator entries for the baud rate are 150 through 2400. The computer automatically selects a baud rate of 300 if no operator entry is made. The Model 2234 hardware and software is two-wire, RS-232C compatible and is specifically designed to interface with an Anadex DP1010 series, 40 column printer. Due to printer speed limitations, the Model 2234 computer will output one character every 20 msec regardless of the baud rate selected. The baud rate selected for the Model 2234 must match the designed baud rate of the printer. This information is located on the serial number tag of the printer. 3.8.9 PRINT TABLE (P01 - P32) - READ CODES 51 - 82 Read Codes 51 through 82 display data selected for printout. The order of printout is identical to the order of operator entry. Acceptable operator entries are detailed in the notes of Table 3-5.
110
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 3.8.10 PRINT FORMAT Forty columns of printed data are segmented into four fields separated by blanks. The four fields correspond to the computer display of data. If all 32 table entries are "NOT USED", only Line No.1 (ID, date and time) is printed.
Sample Printout Read Code
Print table (26 lines are not used)
SECTION 3
ID 789 DATE 800 RATE 801 RATE 802 RATE 900 TOTAL 901 TOTAL 902 TOTAL
Function Description 045 LT L1 L2 LT L1 L2
Engineering Units and Multipliers TIME LBHR LBHR LBHR LBS LBS LBS
14-00 E0 E0 E3 E0 E0 E3
Numeric Data
0 0 0 00041674 00410285 00008972
111
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 3.9
FREQUENCY DENSITOMETER OPTION
The frequency densitometer option enables the computer to determine line density from a frequency output type of densitometer. The densitometer signal frequency is determined by the computer periodically reading the densitometer input counter and storing the total of accumulated pulses. The pulses are accumulated for 18 seconds to attain satisfactory resolution. A running average technique in the computer registers allows the calculated density to be updated at three second intervals. The computer calculates the corrected density in LBF3. The corrected density is displayed using Read 0. Entering a FXD (operator entered) value provides an override of the calculated value. 3.9.1 CALCULATIONS The computer calculates the corrected density in accordance with the following equations. The Read Codes for entering the required terms (constants) to complete the equation are shown at the end of the term definition. Set the "enable/disable" switch to the "enable" position. All constants are defined as fixed-only system constants and will default to zero upon computer cold start unless otherwise noted.
112
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________
Where: DL
=
the indicated (uncorrected) density at line conditions in gm/cc.
f
=
the densitometer output frequency in cycles/second x 10-6
A0, A1, A2 are operator-entered densitometer scaling constants (Read Codes 30, 31 and 32 respectively)
Where: DT
=
the density corrected for temperature effects on the densitometer in gm/cc.
DL
=
as previously defined
TC
=
temperature coefficient (Read Code 29)
TF
=
flowing temperature in DEGF (Read Code 1)
CT
=
a densitometer calibration temperature in DEGF (Read Code 34)
DTC
=
temperature coefficient in gm/cc/oF (Read Code 33)
SECTION 3
113
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER
Where: DLC
=
density corrected for pressure and temperature effects (Read Code 0)
DCF
=
densitometer correction factor (Defaults to 1.0 upon computer cold start)
DT
=
as previously defined
PRS
=
measured pressure (Read Code 2)
K
=
pressure coefficient (read Code 36)
PO
=
pressure coefficient (Read Code 35)
A4
=
pressure coefficient (Read Code 42)
A5
=
pressure coefficient (Read Code 43)
(4) DEN = DLC 62.4278 62.4278
114
=
Factor for converting from gm/cc to LBS/cf.
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 3.9.2 PROMPTING SEQUENCE The Startup Prompting Sequence contains only one prompting entry (DENTYP) for the Frequency Densitometer option. DENTYP appears immediately following CNFIG, the first entry in the sequence. Acceptable entries for DENTYP are: Code
Description
1 2 3 4 5
Analog, or no densitometer input Use API-2565 for density calculation Frequency densitometer, Solartron type or UGC type Frequency densitometer, Barton type Frequency densitometer, Agar type
SECTION 3
115
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 3.9.3 CONSTANTS The operator must enter 11 constants from the front panel keyboard. These entries are not prompted by the computer display. (See Table 3-6.) * Ten constants are defined as fixed-only system constants and will default to zero upon computer cold start unless otherwise noted. Such items as Read Codes 44 through 82 (date, time, print codes, etc. will need to be entered; however, the programs will be run without these items. ** This constant is defined as fixed-only constant and will default to one (1) upon computer cold start unless otherwise noted. Read Codes, display mnemonic terms and engineering unit display terms are defined as follows: Table 3-6. Fixed Only Constants Read Code Literal
Eng. Units
*29 *30 *31 *32 *33 *34 *35 *36 **37 *42 *43
None Densitometer Temperature Coefficient None Densitometer Scaling Constant None Densitometer Scaling Constant None Densitometer Scaling Constant None Densitometer Temperature Coefficient DEGF Densitometer Calibration Temperature None Densitometer Pressure Coefficient None Densitometer Pressure Coefficient None Densitometer Correction Factor None Densitometer Pressure Coefficient None Densitometer Pressure Coefficient
TC A0 A1 A2 DTC CT PO K DCF A4 A5
Description
Valid entries for constants are any real number. Value display is left unjustified.
116
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 3.9.4 EXAMPLES 3.9.4.1 SOLARTRON DENSITOMETERS From the densitometer calibration certificate the following is determined: 1. 2. 3. 4.
Units of calibration are: KG/M3 Calibration temperature is: 20oC Calibration pressure is: 1 BAR Coefficient data is: K0 K1 K2 K18 K19 K20A K20B K21A K21B
SECTION 3
= = = = = = = = =
-1112.63 -0.729462 -4.08188 E-03 -4.9619 E-05 -0.021627 -3.857 E-05 -4.47 E-08 -0.04663 -1.2074 E-03
117
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Step 1 Compute, using a hand calculator, the equivalent coefficients for density units of gm/cc, temperature units of oF and pressure units of PSI from the following relationships: Ao = K0 ÷ 1000 A1 = K1 ÷ 1000 A2 = K2 ÷ 1000
CT = Cal Temp x 9/5 + 32 TC = K18 x 5/9
118
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________
* If no values are given on the calibration certificate for K20B or K21B, A4 and A5 are set equal to zero. In this case K20 = K20A and K21 = K21A.
Step 2 Enter the results obtained using the appropriate Read Codes. For the sample coefficients given above, the proper entries would be as follows: A0 A1 A2 DTC CT TC P0 K A4 A5
= = = = = = = = = =
-1.11263 -7.29462↑ -4 4.08188↑ -6 -1.2015↑ -5 68 -2.7566↑ -5 -1.20897 -2.65931 2.12494↑ -4 -5.7397↑ -3
Read Read Read Read Read Read Read Read Read Read
Code Code Code Code Code Code Code Code Code Code
30 31 32 33 34 29 35 36 42 43
Exercise care to insure applicable units consistency when using the above or similar relationships. The constants A0, A1, A2 must be entered so as to yield density in gm/cc.
SECTION 3
119
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 3.9.4.2 BARTON DENSITOMETERS From the densitometer calibration certificate the following is determined: 1. 2. 3. 4.
Units of calibration are: gm/cc Calibration temperature is: 70oF Calibration pressure is: 14.7 PSI Coefficient data is: A = 7.4145 B = 0.6917
5.
Equation from data sheet is:
Pressure coefficient = +0.0014 GM/cc/1000 PSI Temperature coefficient = -0.0054 GM/cc/100oF
120
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Step 1 Compute the equivalent coefficients using the following relationships: A0 A1 A2 DTC CT TC P0
= = = = = = =
-B 0.0 A Temperature coefficient ÷ 100 70 0.0 0.0
A4 A5
= =
0.0 0.0
Step 2 Enter the results obtained using the appropriate Read Codes. For the sample coefficients given, and assuming 0.5 gm/cc density, the proper entries would be as follows: A0 A1 A2 DTC CT TC P0 K A4 A5
SECTION 3
= = = = = = = = = =
-0.6917 0.0 7.4145 -5.4↑ -5 70 0.0 0.0 2.8 0.0 0.0
Read Read Read Read Read Read Read Read Read Read
Code Code Code Code Code Code Code Code Code Code
30 31 32 33 34 29 35 36 42 43
121
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Exercise care to insure applicable units consistency when using the above or similar relationships. The constants A0, A1, A2 must be entered so as to yield density in gm/cc. 3.9.4.3 AGAR DENSITOMETERS From the densitometer calibration certificate, the following is determined. 1. 2. 3. 4. 5. 6.
Units of calibration are: LB/ft 3 Calibration temperature is: 20.8oC Temperature coefficient: -0.000298 µsec/oC Calibrated span in LB/ft 3 is: 20 Calibrated span in µsec is: 116.050 Coefficient data is: T0 D0 K
122
= = =
195.048 µsec 10.2701 LB/ft 1.2425
3
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ Step 1 Compute, using a hand calculator, the equivalent coefficients for density units of gm/cc and temperature units of oF from the following relationships:
SECTION 3
A0
=
D0(K-2)/62.42778
TC K P0 A4 A5
= = = = =
0.0 0.0 0.0 0.0 0.0
123
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Step 2 Enter the results obtained using the appropriate Read Codes. For the data given, the proper entries would be as follows:
A0 A1 A2 DTC CT TC P0 K A4 A5
124
= = = = = = = = = =
-1.24618↑-1 -4.09069↑-4 5.37292↑-6 Read -4.5704↑ -7 69.44 0.0 0.0 0.0 0.0 0.0
Read Code Read Code Code 32 Read Code Read Code Read Code Read Code Read Code Read Code Read Code
30 31 33 34 29 35 36 42 43
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 3.9.5 COMMAND CODES Command Code 5 (Display Configuration) displays the type of densitometer and the type of densitometer input being used, as selected by the operator during the Start-up Prompting Sequence. The display is formatted as follows: A.
If using analog or Frequency Densitometer (1) (2) (3)
CNFIG DENST yz CFG x w
Where:
B.
x y
= =
z
=
w
=
Configuration Code (1, 2, 3, 4, or 5) type of densitometer input (A = analog, F= frequency) type of densitometer used (1, 3, 4, or 5) paragraph 3.9.2 FT = flange tap
If using API-2565, (2) DENST yz is replaced by API-2565. The type of densitometer in use may be changed by using Command Code 06m. Refer to paragraph 3.7.1.
3.9.6 ALARMS The computer uses the operator entries for DFS (Density Full Scale, Read Code 7) and DZ (Density Zero, Read Code 8) to check both the transducer input and the frequency densitometer calculation. Error Code 16 signals the calculated density (in LBF3) is outside the range identified by DFS and DZ.
SECTION 3
125
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 3.10 CALCULATIONS - EACH METER Equations/calculation methods contained herein are based upon API Manual of Petroleum Measurement Standards, Chapter 14, Section 3, Part 4. In the event of discrepancies the API document shall have precedence.
A.
Orifice Diameter d = OD [1 + PA (TF - PT)] where, d OD PA TF PT
126
= = = = =
Corrected orifice diameter, inches at TF Measured orifice diameter, inches at PT Plate coefficient of thermal expansion Measured fluid temperature, degrees F Plate measurement temperature, degrees F
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ B.
Pipe Diameter D = ID [1 + LA (TF - LT)] where, D ID LA TF LT
C.
= = = = =
Corrected pipe diameter, inches at TF Measured pipe diameter, inches at LT Pipe coefficient of thermal expansion Fluid temperature, degrees F Pipe measurement temperature, degrees F
= = =
the computed Beta ratio at TF Corrected orifice diameter, inches at TF Corrected pipe diameter, inches at TF
Beta B = d/D where, B d D
SECTION 3
127
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER D.
Upstream Static Pressure P = PF, if TLn is equal to 1 P = (HW/27.707) + PF, if TLn is equal to 2 where, P = TLn =
PF = HW = E.
Upstream Static Pressure, PSIA Tap location; 1 = upstream, 2 = downstream n = meter tube number Measured pressure, PSIA Measured differential pressure, InH2O
Expansion Factor for Compressible Fluids Y = 1 - {(0.41 + 0.35 B4)/IE} [HW/(27.707 P)] where, Y B IE HW P
128
= = = = =
Expansion factor per E. above Beta as computed in C. above Isentropic exponent, operator entered Measured differential pressure, InH2O Upstream static pressure per D. above
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ F.
Velocity of Approach Factor EV = 1/(1-B4)1/2 where, EV B
G.
= =
Velocity of Approach Factor Beta as computed in C. above
Mass Flow Factor FM = NC (Pi/4) EV d where, FM NC Pi EV d
SECTION 3
= = = = =
2
the Mass Flow Factor 323.279 [Reference Table 4-5, MPMS 14.3.4] the Number Pi the Velocity of approach factor per F. above corrected orifice diameter per A. above
129
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER H.
130
Orifice Flow Coefficients A0 A1 A2 A3 A4 A5 A6
= = = = = = =
0.5961 0.0291 -0.229 0.003 2.8 0.000511 0.021
L1
=
L2
M2
=
2 L2 / (1 - B), where B is from step C. above
Tu
=
[S2 + S3 e
TD
=
S6 (M2 + S7 M21.3) B1.1
Ts Ts
= =
0.0, if D > A4 A3 (1 - B) (A4 - D), if D < A4
Cd0
=
A0 + A1 B2 + A2 B8 + Tu + TD + Ts
Cd1
=
A5 B0.7 (250)0.7
Cd2
=
A6 B4 (250)0.35
Cd3
=
S1 B4 B0.8 (4.75)0.8 (250)0.35
Cd4
=
(S5 Tu + S8 TD) B0.8 (4.75)0.8
=
S1 S2 S3 S4 S5 S6 S7 S8
= = = = = = = =
0.0049 0.0433 0.0712 -0.1145 -0.2300 -0.0116 -0.5200 -0.1400
1.0/D, where D is from step B. above
-8.5L1
+ S4 e
-6.0L1
] [B4/(1 - B4)]
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ I.
Viscosity of Ethylene MU = 0.01+ 0.000068* (DEN)2 where: MU is the viscosity in centipoise at TF DEN is the flowing density in pounds-mass/cubic foot
J.
Iteration Flow Factor
where: d D Y E HW DEN MU NIC
SECTION 3
= = = = = = = =
orifice diameter pipe diameter expansion factor velocity of approach factor pressure drop across orifice flowing fluid density flowing fluid viscosity 6.23582 X 10-4 [Reference Table 4-5, MPMS 14.3.4]
131
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER K.
Orifice Coefficient Given from H. and J. above. Cd0 Cd1 Cd2 Cd3 Cd4 F1
= = = = = =
first orifice coefficient constant second orifice coefficient constant third orifice coefficient constant fourth orifice coefficient constant fifth orifice coefficient constant iteration flow factor
Constants: Xc = value of X where low Reynolds number switch occurs, 1.142 139 337 256 165 (Reynolds number of 3502.2) A,B correlation constants for low Reynolds number factor A = 4.343 524 261 523 267 B = 3.764 387 693 320 165 1.
Initialize Cd to value at infinite Reynolds number. Cd = Cd0
2.
Calculate X, the ratio of 4,000 to the assumed Reynolds number, according to the formula: X = F1 / Cd
132
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 3.
Calculate the correlation value of Cd, Fc, at the assumed flow, X, and the derivative of the correlation with respect to the assumed value of Cd, Dc, using the following formulae: If (X < Xc) then
Fc = Cd0 + (Cd1 X
0.35
+ Cd2 + Cd3 X 0.8) X 0.35 + Cd4 X 0.8
Dc = (0.7 Cd1 X 0.35 + 0.35 Cd2 + 1.15 Cd3 X 0.8) X0.35+ 0.8 Cd4 X
0.8
Else Fc = Cd0 + Cd1 X 0.7 + (Cd2 +Cd3 X
0.8
)( A - B / X) + Cd4 X 0.8
Dc = 0.7 Cd1 X 0.7 + (Cd2 + Cd3 X
) B/X +
0.8
0.8 Cd3 (A - B/X) X 0.8 + 0.8Cd4 X
SECTION 3
0.8
133
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 4.
Calculate the amount to change the guess for Cd, δCd, using the following formula:
Update the guess for Cd according to: Cd = Cd - δCd
134
5.
Repeat Steps 2, 3 and 4 until the absolute value of δCd is less than 0.000005.
6.
If the value of X is greater than 1.0 then set Cd_f else clear Cd_f
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ L.
Calculation of Mass Flow Rate
where: WHT FM Y Cd DEN
= = = = =
HW
=
mass flow rate in LBm /HR mass flow factor from G. above expansion factor from E. above orifice coefficient from K. above density from API-2565, densitometer or operator entry, Lbm /FT3 measured differential pressure, InH2O
3.10.1 STARTUP PROMPTING A.
Apply power to the instrument
B.
Set the "Enable/Disable" switch to "Enable" and confirm that the green "Enabled" lamp is illuminated.
C.
Simultaneously press CMD and CLR to initialize the instrument. subsequent display/keying sequence is as follows:
SECTION 3
The
135
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER Display
Display Definition
1. CNFIG 2. DENTYP 3. ENTER IE 4. ENTER TFS 5. ENTER TZ 6. ENTER DFS 7. ENTER DZ 8. ENTER PFS 9. ENTER PZ 10. ENTER MFS 11. ENTER DOF 12. ENTER DOZ 13. ENTER TK 14. ENTER LF1 15. ENTER LK1 16. ENTER HF1
Enter System Configuration Code Number (1-11) Enter Densitometer Type (1,2,3,4 or 5) Enter Isentropic Exponent Enter Full scale for Measured Temperature in degrees F Enter Zero Scale for Measured Temperature in degrees F Enter Full Scale for Measured Density in Pounds per Cubic Foot Enter Zero Scale for Measured Density in Pounds per Cubic Foot Enter Full Scale for Measured Static Pressure in PSIA Enter Zero Scale for Measured Static Pressure in PSIA Enter Full Scale Mass for Station Rate in LB/HR Enter Full Scale Density Output in LB/CF Enter Zero Scale Density Output in LB/CF Enter Station Totalizing Factor Enter Low Flow Cutoff for Line 1 (InH20) Enter Totalizing Factor for Line 1 Enter Full Scale Measured Differential Pressure for Line 1 in Inches of Water Enter Inside Diameter of Meter Tube for Line 1 in Inches Enter Orifice Diameter of Meter Tube for Line 1 in Inches Enter Pressure Tap Location for Line 1 (1=Upstream, 2=Downstream) Enter Line 1 Plate Expansion Coefficient Enter Line 1 Plate Measurement Temperature (DEGF) Enter Line 1 Pipe Expansion Coefficient Enter Line 1 Pipe Measurement Temperature (DEGF)
17. 18. 19. 20. 21. 22. 23.
ENTER ENTER ENTER ENTER ENTER ENTER ENTER
ID1 OD1 TL1 PA1 PT1 LA1 LT1
Repeat steps 14-23 as required to comply with the number of runs identified by the configuration used in Step 1. 26. READY
The computer is ready for flow computations if further data entries for options are not required.
136
SECTION 3
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 4.0
CALIBRATION PROCEDURES
4.1
GENERAL
This section contains only bench calibration instructions. The Model 2234 Digital Flow Computer will perform accurately for long periods with very little attention. There is very little routine maintenance required for this equipment. 4.2
BENCH CALIBRATION
Bench calibration procedures are performed at the factory and are not required on initial startup of the Model 2234 Flow Computer. This calibration is required rarely although it should be checked yearly or whenever there is reason to suspect power supply problems. It should be checked/adjusted after replacing a new or repaired PCB in your equipment. 4.2.1
DETERMINE THE INSTRUMENT OPTIONS
Compare the dash number located on the computer with the option diagram in Figure 2-1 to determine the option for which this Model 2234 Computer has been configured. 4.2.2 REQUIRED TEST EQUIPMENT Bench calibration of the Model 2234 Computer is conducted with a minimum amount of test equipment; however efficient calibration of the instrument requires a digital voltmeter (Fluke Model 8800A or equivalent). Miniature clips will be needed for convenient attachment to test points, etc., to avoid shorting or otherwise damaging the circuit boards.
SECTION 4
137
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 4.2.3
PROCEDURE
The Model 2234 Computer is manufactured with two versions of printed circuit board (PCB) No.1. Each version has different designations and/or locations for the test points and trimpot(s). Figure 4-1 shows the original version (DE-8992) and Figure 4-2 shows the more recent design (DE-10421). _____________________________________________________________ NOTE:
In the following calibration procedure, the trimpot(s) for adjustment on the more recent version of the PC board (Figure 4-2) are shown in parentheses. _____________________________________________________________
4.2.4
POWER SUPPLY ADJUSTMENTS
A.
The input power requirement decal is located on the top of the power supply case, at the rear of the instrument. Verify that the proper potential is applied.
B.
Check all supply outputs for proper voltages. Only the +24 volts and +5 volts are adjustable. The power supply is a design which uses sense lines for varying loads. Therefore, to insure optimum performance, the +24 V and +5 V supplies must be adjusted accurately to ensure optimum performance.
138
SECTION 4
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________
Figure 4-1. Original Version of PC Board No.1 (DE-8992 series)
Figure 4-2. More Recent Version of PC Board No.1 (DE-10421 series) SECTION 4
139
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER C.
As a general procedure, turn off the power, pull out the board enough to attach digital voltmeter leads with the miniature clips, replace the board carefully and then re-apply power. Make sure nothing is shorted before applying power.
D.
Adjust the +24 V supply to obtain a +1.000 V reading between TP1(+) and TP3(-) on PC Board No.1 (DE-8992). On PC Board No.1 (DE-10421), obtain a +1.000 V reading between TP3(+) and TP1(-). See Figure 4-3 for power supply voltage adjustment locations. For test point locations, refer to Figure 4-1 or Figure 4-2.
E.
Adjust the potentiometer on the +5 V power supply to obtain a +5.14 V to 5.15 V reading between TP3(-) and Pin 24 of Eprom U5 (+) on older PC Board No.1 (DE-8992 series). On PC Board No.1 (DE-10421 series), adjust the +5 V power supply to obtain a +5.14 V to 5.15 V reading between TP1(-) (or right grounded leg of capacitor C61) and pin 24 of Eprom U14A(+).
140
SECTION 4
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 4.3
FIELD CALIBRATION
4.3.1 RATE VOLTAGE CALIBRATION (See Figures 4-1 or 4-2.) The trimpot in parenthesis refers to the later PC Board No.1 (DE-10421 series). _____________________________________________________________ NOTE:
Trimpot R18 on PC Board No.1 (DE-8992 series) and R1 on PC Board No.1 (DE-10421 series) are factory adjustments only. Do not adjust. _____________________________________________________________
A.
Enter Read Code 11 to display the Mass Rate Full Scale in LBHR. Make a note of this total. "Enable" the computer and enter the total into Read Code 18 (full scale volume rate in LBHR).
B.
Attach a digital voltmeter to terminals 46 (+) and 49 (-) on the rear of the Model 2234. Adjust span trimpot R23 (R4) on P.C. Board No.1 to a reading of +10.000 volts. Enter 0.0 into Read Code 18. Adjust zero trimpot R24 (R5) on PC Board No.1 to a reading of 0.00 volts. Repeat steps A and B until the zero and span are correct without making further adjustments. "Disable" the computer. _____________________________________________________________ NOTE:
Only one rate voltage output requires calibration. The remaining rate voltage outputs are calibrated automatically. _____________________________________________________________
SECTION 4
141
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 4.3.2 REFERENCE VOLTAGE CALIBRATION A.
Attach the positive lead to TP2 (TP2) and the negative lead to TP3 (TP1). The voltmeter should read +5.000 volts ±0.04%. This is a check; if the voltage is not within tolerance, repeat the power supply adjustments.
B.
Use Command Codes 98 and 99 to adjust the analog zero and span. Press "98 CMD". The alpha-numeric display will display the analog zero value in hex, which should read OE4 to represent +1.000 volts. If it is not OE4, adjust R28 (R2) or input zero on PC Board No.1 until OE4 is indicated. Press "99 CMD". The alpha-numeric display will display the analog span value in hex, which should read FIC to represent +5.000 volts. If it is not FIC, adjust R34 (R3) or input span on PC Board No.1 until FIC is indicated. The input zero and input scan adjustments interact with each other. Therefore, repeat procedures above until both readings are correct without further adjustments.
4.3.3 RATE CURRENT CALIBRATION A.
Complete the Rate Voltage calibration outlined in paragraph 4.3.1.
B.
Temporarily disconnect the wire going to terminal 37 (located at the rear of the unit; move the power supply to one side temporarily.) Connect your probes between terminal 37 and the wire you disconnected with the digital voltmeter set to the ammeter function. You will check the current between terminal 37 and the wire you disconnected. If no visible wire is connected to terminal 37, measure between terminal 37 and common (terminal 57).
C.
Move switch to "ENABLE" position. Enter Read Code 11 to display the Mass Rate Full Scale in LBHR. Make a note of this total. "Enable" the computer and enter the total into Read Code 18 (full scale volume rate in LBHR).
142
SECTION 4
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________
Figure 4-3. Power Supply Voltage Adjustment Locations
SECTION 4
143
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER
Figure 4-4. PC Board No.2, Adjustment Locations
144
SECTION 4
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ D.
Adjust gross span trimpot R47 on PC Board No.2 until the meter reads 20.000 mA. See Figure 4-4.
E.
Enter 0.0 into Read Code 18 (zero scale volume in LBHR). Adjust zero trimpot R54 on PC Board No.2 until the meter reads 4.000 mA.
F.
Repeat steps C, D, and E until the zero and span are correct without making further adjustments.
F.
"Disable" the computer and re-connect the wire on terminal 37 if necessary.
SECTION 4
145
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 4.3.4 DENSITY CURRENT CALIBRATION A.
Temporarily disconnect the wire at terminal 38. Connect your probes between terminal 38 and the wire you disconnected with the digital voltmeter set to the ammeter function. You will check the current between terminal 38 and the wire you disconnected. If no wire is connected to terminal 38, measure between terminal 38 and common (terminal 57).
B.
Determine and note the density full scale output of Read Code 12 and density zero output of Read Code 13.
C.
Set the measured density value of Read Code 0 to FXD and enter the full scale density value.
D.
Adjust span trimpot R33 on PC Board No.2 until the meter reads 20.0 mA. See Figure 4-4.
E.
Enter the zero value of the density output into Read Code 0. Adjust zero trimpot R40 until the meter reads 4.00 mA.
F.
Repeat steps C, D, and E until no further adjustments are required.
G.
Replace wire disconnected in step A and return unit to service.
146
SECTION 4
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ 5.0
MAINTENANCE
5.1
GENERAL
This section contains information on maintenance, spare parts and procedures for receiving factory assistance on making repairs. 5.2
PREVENTIVE MAINTENANCE
Preventive Maintenance procedures are not recommended because printed circuit boards can be adversely affected by handling. Therefore, while the Model 2230 Series computer performs to specifications, maintenance is not required. 5.3
RECOMMENDED SPARE PARTS
Daniel recommends only modular spare parts (e,g, plug-in boards, sub-assemblies, etc.). Recommended spare parts for the Model 2230 Series computer are listed in the Spare Parts list in Appendix B. To insure receiving the correct option of each spare part, order the part by its part number.
SECTION 5
147
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER 5.4
CUSTOMER SERVICE REPORT
A Customer Service Report is located in the back of this manual. It is to be used when returning the Model 2230 Series computer to the factory for repairs. Completely fill out this report and include it with the unit in the shipping container. Be sure to include the dash number portion of the Model number. This dash number, found on the rear of the unit, and on the back of the title page, describes the exact power requirements and operating characteristics of the instrument. 5.5
SHIPPING INSTRUCTIONS
Pack the Model 2230 Series computer in its original packing materials (if still available) or in a carton or box with two or three inches of shock absorbing material surrounding it. Ship prepaid via the most suitable method.
148
SECTION 5
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ APPENDIX A: READ CODE LISTING Read Code
Mnemonic Term
Title
Feature
FXD Limits
Ref Par.
0
DEN
Measured Density
Displays Measured Density values in LBF3 (VAR or FXD)
over 0.1
3.6.2
1
TF
Temperature
Displays Measured Temperature in degrees Fahrenheit (VAR or FXD)
-50 to 250oF
3.6.2
2
PF
Static Pressure
Displays Measured Static Pressure in PSIA (VAR or FXD)
0.0 to 5000 PSIA
3.6.2
3
MU
Fluid Viscosity
Displays Fixed or Variable Viscosity Number
>0.0
3.10
4
IE
Isentropic Exponent
Displays Isentropic Exponent Number (FXD)
>0.0
3.10
5
TFS
Temperature Transducer Full Scale
Displays Temperature Transducer Full Scale value in degrees Fahrenheit (FXD only)
-
3.6.1
6
TZ
Temperature Transducer Zero Scale
Displays Temperature Transducer Zero Scale value in degrees Fahrenheit (FXD only)
-
3.6.1
7
DFS
Densitometer Full Scale
Displays Analog Densitometer at Full Scale in LBF3 (FXD only)
-
3.6.1
8
DZ
Densitometer Zero Scale
Displays Analog Densitometer at Zero Scale in LBF3 (FXD only)
-
3.6.1
APPENDIX A
149
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER READ CODE LISTING (Continued) Read Code
Mnemonic Term
Title
Feature
FXD Limits
Ref Par.
9
PFS
Static Pressure Transducer Full Scale
Displays Static Pressure Transducer at Full Scale in PSIA (FXD only)
-
3.6.1
10
PZ
Static Pressure Transducer Zero Scale
Displays Static Pressure Transducer at Zero Scale in PSIA (FXD only)
-
3.6.1
11
MFS
Mass Rate Full Scale
Displays Mass Rate at Full Scale in LBHR (FXD only)
Any positive real number
3.6.3
12
DOF
Analog Density Output Full Scale
Displays Analog Density Output Full Scale in LBF3 (FXD only)
Any positive real number
3.6.5
13
DZ
Analog Density Output Zero Scale
Displays Analog Density Output at Zero Scale in LBF3 (FXD only)
Any positive real number
3.6.5
14 thru 16
Not Used
150
APPENDIX A
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ READ CODE LISTING (Continued) Read Code
Mnemonic Term
Title
Feature
FXD Limits
Ref Par.
17
TK
Station Totalizing Factor
Displays Station Totalizing Factor (FXD only)
-9 to +9
3.6.5
18
WHT
Total Hourly Mass Rate
Displays current Total Hourly Mass Rate in LBHR (VAR or FXD)
Real number greater than 0.0
3.6.4
19
Not Used
29 thru 37,42 & 43
Frequency Densitometer Option
29
TC
Densitometer Temperature Coefficient
Displays Densitometer Temperature Coefficient (FXD only)
Any real number
3.9.3
30
A0
Densitometer Scaling Constant
Displays Scaling Constant (FXD only)
Any real number
3.9.3
31
A1
Densitometer Scaling Constant
Displays Scaling Constant (FXD only)
Any real number
3.9.3
32
A2
Densitometer Scaling Constant
Displays Scaling Constant (FXD only)
Any real number
3.9.3
33
DTC
Densitometer Temperature Coefficient
Displays Densitometer Temperature Correction in gm/cc/oF (FXD only)
Any real number
3.9.3
APPENDIX A
151
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER READ CODE LISTING (Continued) Read Code
Mnemonic Term
Title
Feature
FXD Limits
Ref Par.
34
CT
Densitometer Calibration Temperature
Displays Densitometer Calibration Temperature in DEGF (FXD only)
Any real number of oF
3.9.3
35
P0
*Densitometer Pressure Coefficient
Displays Densitometer Pressure Coefficient (FXD only)
Any real number
3.9.3
36
K
*Densitometer Pressure Coefficient (FXD only)
Displays Densitometer Pressure Coefficient (FXD only)
Any real number
3.9.3
37
DCF
Densitometer Correction Factor
Displays Densitometer Correction Factor (FXD only)
Any positive real number
3.9.3
38-41
Not Used
42
A4
Densitometer Pressure Coefficient
Displays Densitometer Pressure Coefficient (FXD only)
Any real number
3.9.3
43
A5
Densitometer Pressure Coefficient
Displays Densitometer Pressure Coefficient (FXD only)
Any real number
3.9.3
(*)
152
The Densitometer Pressure Coefficient is a combination of the constants entered at Read Codes 35 and 36 and is of the form: Pressure Coefficient = P0 + K DEN in gm/cc/PSI. Refer to equation in paragraph 3.10.
APPENDIX A
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ READ CODE LISTING (Continued) 44 thru 82
Serial Output for Printing Option
Read Code
Mnemonic Term
Title
Feature
FXD Limits
Ref Par.
44
DLY
Print Delay
Print Output delays for the printer carriage return in 100 ms. increments (FXD only)
02 to 99
3.8.2
45
DTE
Day of Year
Displays Day of the Year (FXD only)
001 to 366
3.8.3
46
TIM
Hours/ Minutes
Displays Time in Hours and Minutes (FXD only)
00-00 to 23-59
3.8.4
47
DPT
Daily Print Time
Displays Time Daily Printout to start (FXD only)
00 to 23
3.8.5
48
INT
Print Interval
Displays Time Interval between printings (FXD only)
00 to 24
3.8.6
49
ID
Identification
Displays Identification Number (FXD only)
000 TO 999
3.8.7
50
BUD
Baud
Displays Baud Rate (FXD only)
150 to 2400
3.8.8
APPENDIX A
153
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER READ CODE LISTING (Continued) Read Code
Mnemonic Term
Title
Feature
FXD Limits
Ref Par.
51
P01
Print Location 01
Displays data stored in Print Location 01 (FXD only)
Read Code, Blank Line (-), Not Used
3.8.9
52
P02
Print Location 02
Displays data stored in Print Location 02 (FXD only)
Read Code, Blank Line (-), Not Used
3.8.9
53
P03
Print Location 03
Displays data stored in Print Location 03 (FXD only)
Read Code, Blank Line (-), Not Used
3.8.9
P32
Print Location 32
Displays data stored in Print Location 32 (FXD only)
Read Code, Blank line (-), Not Used
3.8.9
thru 82
154
APPENDIX A
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ READ CODE LISTING (Continued) Read Code
Mnemonic Term
Title
Feature
FXD Limits
Ref Par.
20n
WHn
Line Hourly Flow Rate
Displays Hourly Flow Rate for a selected line (n) in LBHR (VAR or FXD)
Real number greater than 0.0 for test only
3.6.4
21n
LFn
Fixed H20
Line n Cutoff Differential Pressure
>0.0
3.6.4
22n
LKn
Line Totalizing Factor
Displays Totalizing Factor for a selected line (n) (FXD only)
-9 to +9
3.6.5
23n
HFn
Line Differential Pressure Full Scale
Displays Full Scale Differential Pressure in inches of water for a selected line (n) (FXD only)
Real number greater than 0.0
3.6.1
24n
IDn
Line Inside Diameter
Displays Inside Diameter for a selected line (n) in inches (FXD only)
Typically 1.0 to 50.0 inches
3.6.3
25n
ODn
Line Orifice Diameter
Displays Orifice Diameter for a selected line (n) in inches (FXD only)
Typically 0.2 to 40.0 inches
3.6.3
26n
HWn
Line Differential Pressure
Displays Differential Pressure for a selected line (n) in inches of water (VAR or FXD)
0 to 1000 inches of water for test only
3.6.2
APPENDIX A
155
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER READ CODE LISTING (Continued) Read Code
Mnemonic Term
Title
Feature
27n
EXn
Line Extension Factor
Displays Extension Factor for a selected line (n) as HWn x PF (VAR or FXD)
28
CDn
Line n Discharge Coefficient
Displays Discharge Coefficient for a selected line (n) (VAR or FXD)
Typically >0.0
29n
Yn
Line Expansion Factor
Displays Expansion Factor for a selected line (n) (VAR or FXD)
Typically 0.87 to 1.04 typical >0.0
3.6.4
30n
TLn
Line Tap Location
Displays Tap Location for a selected line (n) (FXD only)
1= upstream 2=down stream
3.6.3
31n
FMn
Line n Mass Flow Factor
Line n Mass Flow Factor (VAR or FXD)
Typically >0.0
3.10
32n
PAn
Live n Plate Alpha
Displays Line n Plate Alpha
None
3.10
33n
PTn
Plate Measured Temperatur e
Displays Line n Plate Measure Temperature
Typically> 0.0
3.10
34n
LAn
Line n Pipe Alpha
Displays Line n Pipe Alpha
none
3.10
156
FXD Limits
Ref Par. 3.6.4
APPENDIX A
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ READ CODE LISTING (Continued) Read Code
Mnemonic Term
Title
Feature
FXD Limits
Ref Par.
35n
LTn
Line n Pipe Measure Temperature
Displays Line n Pipe Measure Temperature (FXD)
Typically >0.0
3.10
36n
Bn
Line n Beta
Displays Line n Beta Factor
>0.0
3.10
37n
Pn
Line n Upstream Pressure
Displays Line n Upstream Pressure
>0.0
3.10
800
RATE LT
Station Total Mass Rate
Displays Station Total Mass Rate (VAR only)
80n
RATE Ln
Mass Flow Rate
Displays Mass Flow Rate through the station or selected line (n) (VAR only)
900
TOTAL LT
Station Total Mass
Displays Station Total Mass (VAR only)
90n
TOTAL Ln
Mass Totals
Displays Mass Totals through the station or a selected line (n) (VAR only)
3.6.4
-
3.6.4
81n thru 89n not used
APPENDIX A
3.6.4 -
3.6.4
157
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER
This page intentionally left blank.
158
APPENDIX A
MODEL 2234 DIGITAL FLOW COMPUTER ___________________________ DRAWINGS AND PARTS LIST
APPENDIX B
Spare Parts List
SP-8969-4
Field Wiring Diagram
DE-9144
Lightning Protection
DE-8940
Dimensions
CE-9117
159
__________________________ MODEL 2234 DIGITAL FLOW COMPUTER
This page intentionally left blank.
160
APPENDIX B
WARRANTY CLAIM REQUIREMENTS To make a warranty claim, you, the Purchaser, must: 1.
Provide Daniel with proof of the Date of Purchase and proof of the Date of Shipment of the product in question.
2.
Return the product to Daniel within twelve (12) months of the date of original shipment of the product, or within eighteen (18) months of the date of original shipment of the product to destinations outside of the United States. The Purchaser must prepay any shipping charges. In addition, the Purchaser is responsible for insuring any product shipped for return, and assumes the risk of loss of the product during shipment.
3.
To obtain Warranty service or to locate the nearest Daniel office, sales, or service center call (713) 467-6000, Fax (281) 897-2901, or contact: Daniel Industries, Inc. Electronics P. O. Box 55435 Houston, Texas 77255 When contacting Daniel for product service, the purchaser is asked to provide information as indicated on the following "Customer Problem Report". Daniel Industries, Inc. offers both on call and contract maintenance service designed to afford single source responsibility for all its products. Daniel Industries, Inc. reserves the right to make changes at any time to any product to improve its design and to insure the best available product.
DANIEL INDUSTRIES, INC. CUSTOMER PROBLEM REPORT FOR FASTEST SERVICE, COMPLETE THIS FORM, AND RETURN IT ALONG WITH THE AFFECTED EQUIPMENT TO CUSTOMER SERVICE AT THE ADDRESS INDICATED BELOW. COMPANY NAME:____________________________________________________________________________ TECHNICAL CONTACT:_________________________________ PHONE:______________________________ REPAIR P. O. #:_____________________________ IF WARRANTY, UNIT S/N:_________________________ INVOICE ADDRESS:____________________________________________________________________ _________________________________________________________________ _________________________________________________________________ SHIPPING ADDRESS:___________________________________________________________________ _________________________________________________________________ _________________________________________________________________ RETURN SHIPPING METHOD:__________________________________________________________________ EQUIPMENT MODEL #:____________________ S/N:__________________FAILURE DATE:_____________ DESCRIPTION OF PROBLEM:__________________________________________________________________ ______________________________________________________________________________________________ ______________________________________________________________________________________________ WHAT WAS HAPPENING AT TIME OF FAILURE?________________________________________________ ______________________________________________________________________________________________ ADDITIONAL COMMENTS:____________________________________________________________________ ______________________________________________________________________________________________ ______________________________________________________________________________________________ REPORT PREPARED BY:________________________________ TITLE:________________________________ IF YOU REQUIRE TECHNICAL ASSISTANCE, PLEASE FAX OR WRITE THE MAIN CUSTOMER SERVICE DEPARTMENT AT: DANIEL INDUSTRIES, INC. ATTN: CUSTOMER SERVICE 19203 HEMPSTEAD HIGHWAY HOUSTON, TEXAS 77065
PHONE: (281) 897-2900 FAX: (281) 897-2901
The sales and service offices of Daniel Industries, Inc. are located throughout the United States and in major countries overseas. Please contact the Daniel Industries, Inc., Electronics Division at P. O. Box 55435, Houston, Texas 77255, or phone (713) 467-6000 for the location of the sales or service office nearest you. Electronics offers both on-call and contract maintenance service designed to provide single-source responsibility for all Electronics Products. Daniel Industries, Inc. reserves the right to make changes to any of its products or services at any time without prior notification in order to improve that product or service and to supply the best product or service possible.
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