MODEL 2234 DIGITAL FLOW COMPUTER - Emerson Electric

MODEL 2234DIGITALFLOW COMPUTER__________________________________________

DANIEL INDUSTRIES, INC.HOUSTON, TEXAS

Part Number: 3-9000-333Revision 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 OREDITORIAL ERRORS IN THIS MANUAL OR OMISSIONS FROM THIS MANUAL.DANIEL MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THEIMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR APARTICULAR PURPOSE WITH RESPECT TO THIS MANUAL AND, IN NO EVENT,SHALL DANIEL BE LIABLE FOR ANY SPECIAL OR CONSEQUENTIAL DAMAGESINCLUDING, BUT NOT LIMITED TO, LOSS OF PRODUCTION, LOSS OF PROFITS,ETC.

PRODUCT NAMES USED HEREIN ARE FOR MANUFACTURER OR SUPPLIERIDENTIFICATION ONLY AND MAY BE TRADEMARKS/REGISTERED TRADEMARKS OFTHESE COMPANIES.

COPYRIGHT © 1993BY DANIEL INDUSTRIES, INC.

HOUSTON, TEXAS, U.S.A.

All rights reserved. No part of this work may be reproduced orcopied in any form or by any means - graphic, electronic ormechanical - without first receiving the written permission ofDaniel 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 fromdefects in workmanship and material, provided that such equipment was properly selected for theservice 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 afterinspection by Daniel to be defective in workmanship or material, will be repaired or replaced atDaniel’s sole option, free of charge, and return-shipped at lowest cost transportation. Alltransportation charges and export fees will be billed to the customer. Warranties on devicespurchased from third party manufacturers not bearing a Daniel label shall have the warrantyprovided 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 columnsfor 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’sliability for any loss or damage arising out of, connected with, or resulting from any breachhereof shall in no case exceed the price allocable to the equipment or unit thereof which givesrise to the claim. Daniel’s liability shall terminate one year after the delivery of the equipmentexcept 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 beliable for special or consequential damages, including, but not limited to, loss of profits orrevenue; loss of equipment or any associated equipment; cost of capital; cost of substituteequipment, facilities or services; downtime costs; or claims of customers of the purchaser forsuch damages.

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PREFACEii

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

1.2 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

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 CIRCUITBOARDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.5.4 WIRING THE MODEL 2234. . . . . . . . . . . . . . . . . . . 21

2.5.5 CONTROLLING EXTERNAL INDUCTIVECIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.6 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 CONTENTSiv


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 SELECTING TEMPORARY OR PERMANENTDISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

3.4.2 VALIDITY CHECKS OF DATA ENTRIES . . . . . . . . 75

3.4.3 FUNCTIONS OF SPECIFIC KEYS. . . . . . . . . . . . . . 76

3.4.4 INDICATORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

3.5 DATA INPUT AND OVERRIDING CONTROLS . . . . . . . 79

3.5.1 ENTERING AN OPERATOR - SELECTED VALUE . . 80

3.5.2 SWITCHING MEASURED - VALUES ANDOPERATOR - ENTERED VALUES. . . . . . . . . . . . . . 80

3.6 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 v


3.6.4 COMPUTER CALCULATED VARIABLES . . . . . . . . 89

3.6.5 OUTPUT SCALING. . . . . . . . . . . . . . . . . . . . . . . . . 93

3.6.6 OVER-RIDES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

3.7 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

3.8 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 CONTENTSvi


3.8.10 PRINT FORMAT . . . . . . . . . . . . . . . . . . . . . . . . . 111

3.9 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

TABLE OF CONTENTS vii


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

4.3 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

TABLE OF CONTENTSviii


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 ix


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TABLE OF CONTENTSx


1.0 INTRODUCTION

1.1 GENERAL

The Model 2234 Flowmaster Digital Flow Computer is a microprocessor basedinstrument which is used with differential head meters to measure and display flowrate and compensated total flow.

This manual covers software revisions for Daniel Model 2234 flow computers. TheModel 2234 is a mass flow computer for use with orifice meters. Additionally, thedensity 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 the1991 revision of MPMS Chapter 14.3 (ANSI/API 2530, AGA-3). Thisincludes all read codes, command codes, and error codes.

· Add computation of viscosity for ethylene.

SECTION 1 1


1.1.1 CHANGES

It is intended that Model 2230 Series functionality be maintained. Intermediatecalculations will have read code assignments and default to the "VAR" mode. Ifoperators 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 compliancewith the new measurement standard. For example, there will no longer be aselection for "TAPTYPE". There will be entries for thermal expansion coefficientsfor both the orifice plate and meter tube.

The 800 and 900 series Read Codes will be unchanged in functionality regardingdisplay of Mass Rates and Mass Totals both for individual lines and Station Totals.

An operator selection for TAPLOC is included. If downstream taps are selectedthe 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 forentering data and functions and an eight character alpha-numeric display. Theoperator interface permits the operator to enter, inspect, and change measurementparameters; the operator may enter deviation/alarm limits related to criticaltransducer values, flow rates and totals. Optionally, totalized volume also may bedisplayed on a six-digit electro-mechanical counter on the instrument front panel.

SECTION 12


1.1.2 HARDWARE

The computer is contained in a standard Daniel Industries, Inc. industrial housingwhich is 4-inches wide by 8-1/16 inches high by 21-5/16 inches long. Thesedimensions include an externally mounted 24 VDC or 115/230 VAC power supplyat the rear of the unit.

It is intended and anticipated that the software described herein will be installed ina large number of existing computers in the field. To minimize field difficulty, nohardware changes are to be required for existing computers originally built asModel 2234-XX3. That is, there will be 4k of RAM on board #1 and the softwarewill reside in the 2716 EPROM. Existing computers originally built as Model2234-XX1 will require an upgrade of board #1 to include full RAM capability andboard #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 impacton instruments in service.

SECTION 1 3


1.2 SPECIFICATIONS

1.2.1 INPUTS

Pressure, Densitometer and Temperature

1. Number of Inputs -

· One - Static Pressure, scaled in PSIA· Five - Differential Pressure, scaled in inches of water.· One - Density, scaled in LBF3.· One - Temperature, scaled inoF.

2. Type Input - Differential for 4 - 20 mA signal from any rangetransducer within the range 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

3. Differential Input Range - 3 to 21 mA.4. Differential Input Resistance - 250 Ohms ±0.05%.5. Differential Input Filter - -52 db @ 60 Hz.6. Common Mode Input Range - 0 V to +15 V with respect to

"common".7. Common Mode Input Resistance - Greater than 10 meg Ohms.8. Common Mode Rejection Ratio - Greater than 2000: 1.

SECTION 14


Frequency Densitometer

1. Number of Inputs - One2. Type Input - DC coupled for nominal frequency signal as indicated.

· Solartron device - Square wave 0 to -6 V peak (Requiresexternal capacitive level shifting. Refer to field wiringdiagram.)

· Barton device - Square wave 0 to +15 V peak· Agar device - Square wave 0 to +10 V peak

3. Frequency Range - 1000 to 5000 Hz, minimum pulse width of0.1 ms.

· Solartron device - 1000 Hz to 1350 Hz.· Barton device - 1500 Hz to 2500 Hz· Agar device - 500 Hz to 2000 Hz

4. Input Resistance - 27 K Ohms.

1.2.2 OUTPUTS

A. 0 - 10 Volts Rate - Mass

1. Range - Zero to +10.00 V signal, scalable by keyboard entry torepresent from 0.00 to N pounds per hour. Absolute maximumrange is 0.00 to 10.62 volts.

2. Maximum Load - 5 mA (2 K Ohms, minimum).3. Response Time - Turbine input to Rate Output - 2 seconds,

typical.

SECTION 1 5


B. 4 - 20 mA Rate - Mass

1. Range - 4 to 20 mAsignal scalable by keyboard entry torepresent from 0.00 to N pounds per hour. Absolutemaximum range is 4 to 21 mA.

2. Maximum Load Resistance - 900 Ohms (18 V) to common.3. Response Time - Differential Pressure Input to Rate Output -

2 seconds typical.

C. Density, 0 - 10 V

1. Range - 0.00 to +10.00 V signal, scalable by keyboard entryto represent X to Y pounds per cubic foot. Absolutemaximum range is zero to 10.62 Volts.

2. Maximum Load - 5 mA (2 K Ohms minimum).3. Response Time, Densitometer input to Density Output -

2 seconds, typical (for densitometer mode).4. Response Time, Temperature and/or Static Pressure Input to

Density Output - 4 seconds, typical (for API-2565 mode).

D. Density, 4 - 20 mA2

1. Range - Four to 20 mA signal, scalable by keyboard entry torepresent X to Y pounds per cubic foot. Absolute maximumrange is 4 to 21 mA.

2. Maximum Load Resistance - 900 Ohms (18 V) to common.3. Response Time, Temperature and/or Static Pressure Input to

Density Output - 4 seconds, typical (for API-2565 mode).4. Response Time, Densitometer Input to Density Output -

2 seconds, typical (for densitometer mode).

SECTION 16


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.

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NOTE: For inductive loads, the user is responsible for providingresistive/capacitive suppression for the contact.

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2. Scaling - One closure per least significant digit advance of theStation Total Display.

3. Maximum Instantaneous Rate - 25 per second. (See item 5 todetermine maximum continuous rate)

4. Duration - 20 ms, nominal.5. Rate Contact Life -

· 200,000,000 counts at minimum load.· 10,000,000 counts at maximum load.

SECTION 1 7


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 VAresistive, 3.5 VA inductive.

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NOTE: For inductive loads, it is the responsibility of the user toprovide arc suppression for the contact.

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2. Forward contact closes in response to input differential pressureabove low flow cutoff on line 1. Reverse contact closes inresponse to input differential pressure above low flow cutoff forline 2. For proper operation of direction sense, the bi-directional line must be configured as two separate lines.

SECTION 18


G. Alarm Contact Closure

1. Rating - Form B contact, 30 VDC or AC, 0.75 Amp, 10 VAresistive, 3.5 VA inductive.

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NOTE: For inductive loads, the user is responsible for providingresistive/capacitive suppression for the contact.

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2. Function - Closes to indicate power failure, processor failure, orother alarm condition.

H. Serial Output

1. Baud Rate - Selected by operator. Standard rates from 150 to2400 baud.

2. Type - Ten bits in ASCII serial form.3. Voltage Levels - RS232C. +12 V to -12 V

· Logic 0 - +3 Volts minimum.· Logic 1 - -3 Volts minimum.

4. Character Frequency - Maximum 1 character per 20 msec.,regardless of baud rate.

I. Transducer Power - Regulated +24 VDC, 300 mA. Ripple, 100 mVmaximum for 300 mA resistive load.

SECTION 1 9


1.2.3 DISPLAYS (Refer to Figure 1-1)

A. Eight-digit Alpha/Numeric

1. Sixteen-segment LED.2. Full 64-character ASCII Code.

B. Six-digit mechanical counter without reset for Station Mass totals

C. Status indicators

1. Red LED - indicates a current error or alarm condition. ThisLED is ON if either the Watchdog Timer has timed out oranother condition exists.

2. Yellow LED - Indicates that an error condition has occurredsince all errors were last cleared via the keyboard even thoughthe error condition no longer exists.

3. Green LED - Indicates that the operator may enter or changedata in the computer via the keyboard. The enter/changecapability is enabled by placing the enable/disable switch on PCboard No.1 in the ENABLE position.

SECTION 110


Figure 1-1. Model 2234 Display

SECTION 1 11


1.2.4 CONTROLS

A. Enable/Disable Switch (S1) - Located on PC Board No.1

1. ENABLE position - Permits the operator to enter or changecritical constants or scaling. This does not stop computercalculation. Green LED indicator on front panel.

2. DISABLE position - Prevents using the keyboard to enter orchange critical constants or scaling.

B. Keyboard - 24 Keys

1. Enter (ENTR) - Inputs into memory any valid data shown onthe Alpha/Numeric display.

2. Display (DSPY) - Recalls blanked data to the display whenoperation is in "display timeout" (see paragraph 3.7.1).

3. Numerals, period (.), and minus sign (-) - For enteringnumerical data or function codes.

SECTION 112


4. Read (READ) - Entering a one- two- or three-digit functionnumerical code and pressing READ displays the data being usedor calculated by the computer (see Table 3-1).

5. Fixed (FXD) - Pressing FXD displays data stored in thecomputer by the operator (e.g., pressure, temperature, gravity,etc.). An asterisk displayed with the data identifier indicatesthat the computer isnot currently using the data value for itscomputations.

6. Variable (VAR) - Pressing VAR displays data from a transduceror a computer calculation. An asterisk displayed with the dataidentifier indicates that the computer isnot currently using thedata for its computations.

7. Clear (CLR) - Pressing CLR removes entered data values fromthe data code displayed and displays "0.0".

8. Command (CMD) - Entering a one- two- or three-digitnumerical code and pressing CMD causes the computer toexecute the specified command (see Table 3-2). Thesecommands include the display of errors and the resetting oftotals. (Totals can be reset only when the green LED islighted.)

SECTION 1 13


9. Up Arrow (↑) - Pressing↑ results in the following actions bythe computer:

a. Reading data -↑ causes the computer to step back to theprevious data code. For example, if the datacorresponding to Read Code 2 is being viewed, pressing↑ causes the computer to display the data correspondingto Read Code 1.

b. Entering data -↑ indicates to the computer that the datato follow is an exponent (e.g., 2↑ 5= 2 x 105=200,000).

10. Down Arrow (↓) - Causes the computer to step to the next datacode.

11. Print (PRNT) - Pressing PRNT sends operator selected dataoutput to an external printer.

1.2.5 ACCURACY

A. Low Flow Cutoff - 2% of Full Scale Differential Pressure of lowestrange transducers for each tube.

B. Density - determined from the Frequency Densitometer input; ±0.1%of densitometer span for a minimum span of 0.2 LBF3.

C. Rate Determination - is ±0.1% of full scale.D. Temperature Coefficient for Totals - is 0.005%/F.

SECTION 114


1.2.6 OTHER

A. Power

· Voltage options -

1. 115 Vac ±10%, 47 to 63 Hz.2. 230 Vac ±10%, 47 to 63 Hz.3. 21 Vdc to 29 Vdc.

· Power required - (without transducers, current rate outputs andmechanical counter) 10 VA typical, for basic instrument.

B. Operating Temperature

· 0oF to 140oF· 20oF to 140oF with mechanical counter

C. Storage Temperature-40oF to 140oF

D. Humidity0 - 95%. Non-condensing

E. Physical CharacteristicsDimensions - Industrial Housing,4" wide x 21 - 5/16" long x 8 - 1/16" high

F. WeightApproximately 17 pounds

SECTION 1 15



SECTION 116


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 tobe returned to the factory. In addition, this section contains installation instructionsand computer startup procedures.

2.2 UNPACKING

Carefully unpack the computer. Retain all packing materials. Thoroughly inspectthe Model 2234 for visual damage. Inspect the power supply at the rear of thechassis, the printed circuit boards and the front panel which contains the push-button controls and the LED display monitor. Keep the packing materials untilafter 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 forwardimmediately to the factory for further instructions. Include complete model numberinformation. Refer to the Customer Problem Report in the back of this manual.

SECTION 2 17


2.4 SHIPPING INSTRUCTIONS

The factory may request that the computer be returned for repair or partsreplacement. If so, the Model 2234 must be well packed for the return shipmentto prevent further damage to parts and assemblies. Surround the computer withtwo to three inches of shock absorbing material. Pack it in its original packingmaterials (if still available) or in a sturdy carton or box. Ship prepaid via the mostsuitable method.

2.5 INSTALLATION

2.5.1 DETERMINING OPTIONS

The model number and option code for the Model 2234 are located on the rear ofthe instrument when removed from the housing. To determine the options of theinstrument, compare the model number and option codes to those inFigure 2-1.

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NOTE: Make certain of the options contained in the instrument beforewiring the equipment. Otherwise, damage to the instrument orinaccurate data may result.

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SECTION 218


Figure 2-1. Model Number and Option Codes

SECTION 2 19


2.5.2 CASE MOUNTING

The Model 2234 Flow Computer is designed primarily to be mounted in anindustrial panel cutout. The case is held in place in the panel by jack barsprovided with the computer. The panel mounting bezel is provided to coverunfilled space around the computer’s front panel after installation and may or maynot 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 releaseon the front of the computer and sliding the computer out of the case to the detentposition. 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 benchcalibration as discussed in Section 4. Turn off power if the computer is to beremoved from the case. The power switch is located on the power supply at therear of the case. Remove the computer from the case by pressing the latch releaseon top of the computer, pulling it out of the case, and disconnecting the cable atthe rear of the computer.

SECTION 220


2.5.4 WIRING THE MODEL 2234

Refer to the Field Wiring Diagram DE-9144 in the rear of this manual for voltageinputs and outputs. Note that all input load resistors are located on the terminalboard at the rear of the computer. Ensure the power switch is OFF.

____________________________________________________________

NOTE: A chassis ground connection to computer common is providedon the rear terminal PC board. Refer to Note 5 on the fieldwiring diagram when grounding is to be made elsewhere in thesystem.

____________________________________________________________

Use good instrument wiring practices ensuring that the inputs and outputs areprotected against transients. The use of external transient protectors should beconsidered in areas of high lightning incidence. Transient protectors specificallyfor Daniel instruments are available from Daniel and, when properly installed,provide excellent protection of the computer from very large transients.

SECTION 2 21


2.5.5 CONTROLLING EXTERNAL INDUCTIVE CIRCUITS

Externally located inductive circuits may be controlled from the Model 2234 viacontact closure outputs. However, an external arc suppression network must beused to prevent radiation of high frequency energy into the circuitry, causing falseoperation of the computer.

_____________________________________________________________

NOTE: The unit will compute in error with an unsuppressed inductiveload connected to the contact closure output.

_____________________________________________________________

The contact closure rating is 30 VDC or VAC, 0.75 amperes, not to exceed 10 Wresistive, 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 inparallel with the coil to be energized. Ensure that the diode polarity is such thatwhen the coil is in the energized condition, the diode is non-conducting. Thediode should have a voltage rating equal to or greater than the external D-C supplyvoltage. Its current rating should be equal to or greater than the coil energizingcurrent.

SECTION 222


2.5.5.2 A-C POWERED CONTACT CLOSURE CIRCUITS

The diode type arc suppression cannot be used when the inductive circuits arepowered from an A-C source. Instead, use a series connected resistor and capacitorto suppress the arc. The values of the components of this series network must beselected per supply voltages used, contact ratings, and load characteristics. Connectthe series network across the coil. With a supply voltage of 24 VAC, a typicalnetwork consists of a 100 Ohm, one-half watt resistor and a 0.02 to 0.05microfarad capacitor. With a supply voltage of 12 VAC, a typical network consistsof a 30 Ohm, one-half watt resistor and a 0.1 microfarad capacitor.

_____________________________________________________________

CAUTION: Do not operate 115 VAC circuits via the contactclosure outputs of the Model 2234.

_____________________________________________________________

After the computer is installed and the wiring checked, proceed with the startupinstructions.

SECTION 2 23


2.6 STARTUP

2.6.1 GENERAL

Upon initial startup, the computer prompts the operator to define and enter thebasic operating parameter information necessary for a specific application. Theseparameters include the system configuration; scaling of pressure, temperature anddifferential pressure inputs, etc. The operator entry of the startup data isaccomplished by a "Startup Prompting Sequence" with the computer displayingeach parameter name or mnemonic in succession and the operator entering therequired 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 PromptingSequence. You will normally need to adjust the configuration placed in the unitby the factory to your particular usage. Table 2-1b includes the printer outputoptions and the Frequency Densitometer (if used) Options. No automaticprompting occurs for these options.

Note that an internal memory support battery maintains all "startup" parameters inthe computer memory for a minimum of 45 days without power input. Thisprevents repeating the Startup Prompting Sequence after a short-term shutdown ora power failure. Additionally this feature allows the computer to be set up at thefactory or elsewhere and then shipped to the field without loss of these keyparameters.

SECTION 224


Figure 2-2. Model 2234 Keyboard

SECTION 2 25


Apply power to the computer to confirm if the Startup Prompting Sequence hasbeen previously completed. READY indicates that the Startup Prompting Sequencehas 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 operatorentry "enable/disable" switch on PC Board No.1 to the "enable" position. Confirmthat the green "enable" lamp on the front panel is lighted. Refer to paragraph 2.6.2for 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 dataare shown in capital letters. The data required by the computer is entered simplyby keying in the required numbers via the front panel keyboard and then pressingthe 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. Forease of data entry, complete the form provided in Table 2-1a of this manual anduse it as a guide when performing the startup.

A "power-save" feature of the computer causes the display of data or a mnemonicto 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).

SECTION 226


A. CNFIG - Enter the code number for the appropriate systemconfiguration from the following table. RANGE ER (Range Error) isdisplayed for any other entry.

Configuration Number TransducerNumber Meter Tubes Type (S)*

1 1 S2 2 S,S3 3 S,S,S4 4 S,S,S,S5 5 S,S,S,S,S6 1 D7 2 D,S8 2 D,D9 3 D,S,S10 3 D,D,S11 4 D,S,S,S

*S = Single Differential Pressure TransmitterD = Dual Stacked Differential Pressure Transmitters

SECTION 2 27


B. DENTYP - Enter the appropriate code number for the desired densityto be used. RANGE ER is displayed for any other entry.

DENTYP DensityCode Number Used

1 Analog or no densitometer2 API 2565 calculated density3 Frequency densitometer, Solartron type.4 Frequency densitometer, Barton type5 Frequency densitometer, Agar type

C. IE - Enter the Isentropic Exponent (ratio of specific heat); Value mustbe more than 0.0.

D. TFS - DEGF - Enter the full scale value for measured temperature inoF.

E. TZ - DEGF - Enter the zero value for measured temperature inoF.

F. DFS - LBF3 - Enter the full scale value for measured density inpounds per cubic foot.

SECTION 228


G. DZ - LBF3 - Enter the zero value for measured density in pounds percubic foot.

H. PFS - PSIA - Enter the full scale value for measured static pressurein 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 perhour (LBHR).

K. DOF - LBF3 - Enter the full scale value for the density output inpounds per cubic foot.

L. DOZ - LBF3 - Enter the zero value for the density output in poundsper cubic foot.

M. TK - Enter the numerical value of the integer for the StationTotalizing Factor. Acceptable values are -9 to +9. Refer to paragraph2.6.3.1 for detailed instructions. Pressing only ENTR enters 0 for TK.

SECTION 2 29


N. LFn - Enter line (n) cutoff in inches of water (InH2O) for each lineused.

O. LKn - Enter the numerical value of the integer for the TotalizingFactor of the line (n) indicated by the display. Acceptable values are -9 to +9. Refer to paragraph 2.6.3.1 for detailed instructions. PressingENTR enters 0 for LKn.

P. HFn - H20 - Enter the full scale value, in inches of water, formeasured differential pressure in the indicated transducer (HF1, HF2,etc).

_______________________________________________________

NOTE: See Field Wiring Diagram for definition of transducersrelative to configuration selected.

_______________________________________________________

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.).

TL N Tap LocationCode Number (from the orifice)

1 Upstream2 Downstream

SECTION 230


T. PAn - Enter the Plate Expansion Coefficient for the respective plates(PA1, PA2, etc.).

U. PTn - Enter Plate Measurement Temperature (DEGF) for the respectiveplates (PT1, PT2, etc.).

V. LA n - Enter the Pipe Expansion Coefficient for the respective lines(LA1, LA2, etc.).

W. LTn - Enter the Pipe Measurement Temperature (DEGF) for therespective lines (LT1, LT2, etc.).

N through W are repeated in succession for each line. After the Startup PromptingSequence is completed (all of the data required is entered), the computer willdisplay READY to indicate that it can begin flow calculations. However, duringinitial startup, several alarm conditions will necessarily have occurred since thecomputer previously has not been programmed.

The red lamp indicator on the computer’s control panel indicates an existing alarmcondition. The amber light indicator signifies an alarm condition that occurred inthe past and has not been acknowledged and cleared by the operator.

SECTION 2 31


Key on "0" to note and to clear alarms and the alarm memory list. Press andrelease the CMD key. Note the alarm number on the computer display. Press theCLR key. The alarm is cleared by the computer and the next alarm number isdisplayed. Continue to clear each alarm until the computer displays READY.

If the alarm numbers begin to repeat, the condition(s) causing the alarm(s) stillexists and must be eliminated. Refer to Error Code Diagnostic Table 2-5 todetermine the possible cause of the alarm and suggested solutions.

After all alarm and alarm memory conditions are cleared, both the red and amberindicators will go out. The display will indicate READY.

Paragraph 3.5.1 of this manual describes the basic use of operator-enteredparameter values and how to enter the values into the computer. Paragraph 3.6describes the values individually and their acceptable entry limits.

SECTION 232


Table 2-1a. Data Entry Example/Guide

Display DisplayDefinition

ExampleMeasurementData fromTable 2-2

ActualData tobeEntered

Reference

A. CNFIG Enter systemconfigurationcode number

2 ENTR ________ para 2.6.2 (A)

B. DENTYP Enterdensitometer type(1,2,3,4 or 5)

2 ENTR ________ para 2.6.2 (B)

C. IE IsentropicExponent

1.3622 ENTR ________ para 2.6.2 (C)

D. ENTER TFS Enter full scalefor measuredtemperature inoF

150 ENTR ________ para 2.6.2 (D)

E. ENTERTZ

Enter zero scalefor measuredtemperature inoF

50 ENTR ________ para 2.6.2 (E)

F. ENTERDFS

Enter full scalefor measureddensity in poundsper cubic foot

20 ENTR ________ para 2.6.2 (F)

G. ENTER DZ Enter zero scalefor measureddensity in poundsper cubic foot

0 ENTR ________ para 2.6.2 (G)

SECTION 2 33


Table 2-1a. Data Entry Example/Guide(Continued)




Reference

H. ENTER PFS Enter full scalefor measuredstatic pressure inPSIA

1000 ENTR ________ para 2.6.2 (H)

I. ENTER PZ Enter zero scalefor measuredstatic pressure inPSIA

0 ENTR ________ para 2.6.2 (I)

J. ENTERMFS

Enter full scalemass for stationrate in LB/HR

2.1 ↑ 5 ENTR ________ para 2.6.2 (J)

K. ENTERDOF

Enter full scaledensity output inLB/CF

20 ENTR ________ para 2.6.2 (K)

L. ENTERDOZ

Enter zero scaledensity output inLB/CF

0 ENTR ________ para 2.6.2 (L)

M. ENTER TK Enter stationtotalizing factor

1 ENTR ________ para 2.6.2 (M)

N. ENTER LF1 LineN cutoff inInH2O for line 1

1 ENTR ________ para 2.6.2 (N)

O. ENTER LK1 Enter totalizingfactor for line 1

1 ENTR ________ para 2.6.2 (O)

SECTION 234






Reference

P. ENTER HF1 Enter full scalemeasureddifferentialpressure for line1 in inches ofwater

100 ENTR ________ para 2.6.2 (P)

Q. ENTER ID1 Enter insidediameter of metertube for line 1 ininches

8.071 ENTR ________ para 2.6.2 (Q)

R. ENTEROD1

Enter orificediameter of metertube for line 1 ininches

4 ENTR ________ para 2.6.2 (R)

S. ENTERTL1

Enter pressuretap location forline 1(1=upstream,2=downstream)

1 ENTR ________ para 2.6.2 (S)

T. ENTER PA1 Enter plateexpansioncoefficient forline 1

9.25↑ -6 ENTER ________ para 2.6.2 (T)

U. ENTER PT1 Enter platemeasurementtemperature forline 1

60.0 ENTER ________ para. 2.6.2 (U)

SECTION 2 35






Reference

V. ENTER LA1 Enter pipeexpansioncoefficient forline 1

6.2↑ -6 ENTER ________ para 2.6.2 (V)

W. ENTER LT1 Pipemeasurementtemperature forline 1

60.0 ENTER ________ para. 2.6.2 (W)

N. ENTER LF2 Linen cutoff inInH20 for line 2

1 ENTR ________ para 2.6.2 (N)

O. ENTER LK2 Enter totalizingfactor for line 2

1 ENTR ________ para 2.6.2 (O)

P. ENTER HF2 Enter full scalemeasureddifferentialpressure for line2

100 ENTR ________ para 2.6.2 (P)

Q. ENTER ID2 Enter insidediameter of metertube for line 2 ininches

8.071 ENTR ________ para 2.6.2 (Q)

R. ENTEROD2

Enter orificediameter of metertube for line 2 ininches

4 ENTR ________ para 2.6.2 (R)

SECTION 236






Reference

S. ENTER TL2 Enter pressuretap location forline 2(1=upstream,2=downstream)

1 ENTR ________ para 2.6.2 (S)

T. ENTER PA2 Enter plateexpansioncoefficient forline 2

9.25↑ -6 ENTER ________ para 2.6.2 (T)

U. ENTER PT2 Enter platemeasurementtemperature forline 2

60.0 ENTER ________ para 2.6.2 (U)

V. ENTER LA2 Enter pipeexpansioncoefficient forline 2

6.2↑ -6 ENTER ________ para 2.6.2 (V)

SECTION 2 37






Reference

W. ENTER LT2 Pipemeasurementtemperature forline 2

60.0 ENTER _______ para 2.6.2 (W)

X. READY The computer isready for flowcomputations iffurther dataentries foroptions are notrequired. SeeTable 2-1b. 2-2,and 2-3 foroptional datarequirements.

SECTION 238


Table 2-1b. Data Entry Example/Guide

ReadCode

Mnemonic Definition Data to beEntered

ParagraphReference

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


Table 2-1b. Data Entry Example/Guide (Continued)

ReadCode


ParagraphReference

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 240


Table 2-2. Serial Output Option

ReadCode


ParagraphReference

44 DLY PRINT DELAYEnter 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 PRINTat 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 RATE150-2400

__________ 3.8.8

SECTION 2 41


Table 2-3. Frequency Densitometer Option

ReadCode


ParagraphReference

30 A0 Densitometer Scaling Constant __________ 3.9.3



33 DTC Densitometer TemperatureCorrection

__________ 3.9.3

34 CT Densitometer CalibrationTemperature

__________ 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 242


2.6.3 SUPPLEMENTARY STARTUP INSTRUCTIONS

This subsection is intended as a checklist of possible additional parameter entriesor modifications that may be required before placing the computer into service.Where appropriate, references are made to more detailed explanations andinformation contained in Section 3 of this manual.

Prior to placing the computer into service, confirm the values for eachmeasurement parameter (by using the Read Codes described in paragraph 3.6).Note especially that density, pressure, temperature and differential pressure willappear on the display as a varying value (VAR) unless the operator manually entersa 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 perparagraph 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 thefactory-programmed factors of 10o. If so, determine the factors to be used per thefollowing example. Then enter the factors as described in paragraph 3.6.5.

The maximum instantaneous pulse rate output allowed by the computer is 25pulses/second (25 unit volumes in pounds x 1/10, etc.). However, a 25pulse/second rate shortens the life of the Sodeco RG Series counter to 92.6 days

SECTION 2 43


and the relay contacts to between 4.6 and 46.3 days, based on their ratedspecifications. It is recommended that the maximum long term pulse rate belimited to one per second. This will yield a rated life upwards of 2315 days forthe electromechanical counter, and upwards of 115 to 1157 days for the relaycontacts. Calculate the required factors per the following example:

Assume the system contains two head meters, and that the average flow througheach meter is 300 LBH. Each meter flow is totalized in pounds (by using thefactory-programmed Line Volume Totalizing Factor of 10o). Each meter will yield7200 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 isentered (totalizing in tenths of pounds). This will yield 72,000 pulses (tenths ofpounds) per day (300 x 24 ÷ 10-1) for each meter, or ten times the number ofpulses 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 sothe station volume rate is of the greatest consequence. In the preceding examplewhere the flow rate through each of two meters is 300 LBH, a factory programmedStation 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 counter144,000 pulses (tenths of pounds) per day.

The Station Volume Factor of 10-1 would yield a life of 1,389 days for the counterand life of 69 to 694 days for the relay contacts.

SECTION 244


Note that the Line and Station Volume Totalizing Factors are the same (10-1 in theexamples above). This does not have to be the case. Different applications mayrequire a Station Totalizing Factor different from the Line Totalizing Factor inorder 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. TheseRead Codes are inoperable if the print option was not selected withthe purchase of the computer. Refer to paragraph 3.8 of the manualfor setup and printing instructions.

B. Frequency-type Densitometer Input Option:

The frequency densitometer input option provides for the computer todetermine line density from the output of a frequency-typedensitometer. Read Codes 30 through 37 allow the operator to enterand read the control parameters. Refer to paragraph 3.9 for set upinstructions if this option is being used. Note that the instructions inparagraph 3.9 must be followed to extinguish the red error lamp if theresponse to DENTYP in the Startup prompting Sequence was 1, 2, 3,4, or 5.

SECTION 2 45


C. Orifice Measurement of Liquids:

The Model 2234 Mass Flow Computer can be used withoutmodification to measure liquids. The changes and uses of operator-entered 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, thenpress CMD. The display can be returned to the "power-save" timeout mode bykeying 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 preventunauthorized or accidental data entry. Ensure that the green "enable" indicatorlamp on the front panel is OUT.

SECTION 246


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 theorifice.

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 inTable 2-4.

SECTION 2 47


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 isextinguished. The instrument is now fully operational and ready for service.

SECTION 248


Table 2-4. Typical Startup Sequence

Display Key Note

1. CNFIG2. DENTYP3. IE4. ENTER TFS5. ENTER TZ6. ENTER DFS7. ENTER DZ8. ENTER PFS9. ENTER PZ10. ENTER MFS11. ENTER DQF12. ENTER DQZ13. ENTER TK14. ENTER LF115. ENTER LK116. ENTER MF117. ENTER ID118. ENTER QDI19. ENTER TL120. ENTER PA121. ENTER PT122. ENTER LA123. ENTER LT124. ENTER LF225. ENTER LK226. ENTER MF227. ENTER ID228. ENTER QD229. ENTER TL230. ENTER PA231. ENTER PT232. ENTER LA233. ENTER LT2

2 ENTR2 ENTR2 ENTR150 ENTR50 ENTR20 ENTR0 ENTR1000 ENTR0 ENTR2.1 ↑5 ENTR20 ENTR0 ENTR1 ENTR1 ENTR1 ENTR100 ENTR8.071 ENTR4 ENTR1 ENTR9.25 ↑ -6 ENTR60.0 ENTR6.2 ↑ -6 ENTR60.0 ENTR1 ENTR1 ENTR100 ENTR8.071 ENTR4 ENTR1 ENTR9.25 ↑ -6 ENTR60.0 ENTR6.2 ↑ -6 ENTR60.0 ENTR

1

2

3

3

SECTION 2 49


1. Assuming maximum flow in each line, flowing temperature of 65oF, flowingpressure of 800 PSIA, and density of 8.26 LBF3, the maximum rate iscalculated.

2. A full scale rate of 205,000 pounds per hour is equivalent to 57 pounds persecond. The totals register cannot be incremented at a rate in excess of 25units per second. A Station Totalizing Factor of 101 is selected to yieldmaximum resolution while limiting the totals register increment rate to 5.7units per second.

3. The Line Totalizing Factor is selected for consistency with the stationtotalizing units (See note 2). This is not required for proper computeroperation. However, the line totals cannot be incremented at a rate greaterthan 1000 units per second.

SECTION 250


Table 2-5. Error Code Diagnostic Chart

Error Code Possible Cause Check Solution

00Analogdensitytransducerout of range

NOTE: ErrorCode isactive ifDENTYP is"1".

1. Densitometer notused.

2. Incorrect zero orfull scale entered fordensitometer.

3. Densitometer outputis greater than 102%.

4. Density out ofrange, densitometermalfunctioning or mis-calibrated, wiringerror.

1. Check VAR valueof read code 0(DEN-LBF3).

1. Check values ofread codes 12 (DFS)and 13 (DZ).

1. If read code 0 valueis greater than readcode 12;

1. If read code 0 valueis less than read code13;

1. Place read code 0in FXD mode. Enteraverage density(paragraph 3.6.2).

1. Enter correct fullscale and zero valuesper paragraph 3.6.5.

1. Check wiring.2. Verify density3. Checkdensitometer.

1. Check wiring.2. Verify density.3. Checkdensitometer.

SECTION 2 51


Table 2-5. Error Code Diagnostic Chart(Continued)


01Temperaturetransducerout of range

1. Temperaturetransducer not used.

2. Incorrect zero orfull scale entered.

3. Temperaturetransducer output isgreater than 102%.

4. Temperature out ofrange, transducermalfunctioning or mis-calibrated, wiringerror.

1. Check VAR valueof read code 1(flowing temperature).

1. Check values ofread code 5 (TFS) andread code 6 (TZ).



1. Place read code 1in FXD mode. Enteraverage operatingtemperature(paragraph 3.6.2).


1. Check wiring.2. Verify temperature.3. Check transducer.

1. Check wiring.2. Verify temperature.3. Check transducer.

SECTION 252




02Staticpressuretransducerout of range

1. Pressure transducernot used.

2. Incorrect zero orfull scale entered.

3. Pressure transduceroutput is greater than102%.

4. Pressure out ofrange, transducermalfunctioning or mis-calibrated, wiringerror.

1. Check VAR valueof read code 2.

1. Check values ofread code 9 (PFS) andread code 10 (PZ).



1. Place read code 2in FXD mode. Enteraverage operatingpressure (paragraph3.6.2).


1. Check wiring.2. Verify pressure.3. Check transducer.


SECTION 2 53




03Line 1differentialpressureunder range

1. Pressure transducernot used for line 1.


1. Check VAR valueof read code 261(H2O).

2. Check code numberentered for CONFIG(system configuration),command code 5.

1. Enter newCONFIG codenumber.









SECTION 254


















SECTION 2 55











08Temperatureout of rangefor densitycalculationNOTE: errorcode 8 isdisabled if 12CMD isenabled.

1. Incorrect ormalfunctioningtemperature probebeing used forcomputing densitycalculation.

1. Check that producttemperature is between65oF and 166.9oF, readcode 1

1. Check transducercalibration.

SECTION 256




09Pressure outof range fordensitycalculation

2. Incorrect ormalfunctioningpressure probe beingused for computingdensity calculation.

1. Check that pressureis between 200 and2099.9 PSIA, readcode 2.

1. Check transducercalibration.

10Stationvolume totalsstepping rateis greaterthan 25pulses persecond

1. Flow rate too high,totalizing factor settoo low.

1. Check read code 17(TK) for proper factorvalue (paragraph3.6.5).

1. Enter a correctedtotalizer factor perparagraph 2.6.3.1.

11Invalid ratioof pipe I.D.to orificediameter

1. Incorrect setting ofinside line diameterand/or line orificediameter.

1. Check value ofinside pipe diameterfor individual lines,read codes 241, 242,243, 244 and 245(paragraph 3.6.3).

2. Check value of lineorifice diameter forindividual lines, readcodes 251, 252, 253,254 and 255(paragraph 3.6.3).

1. Enter correctvalues(s) for pipe I.D.and/or pipe orificediameter.

SECTION 2 57




12Excessivemass rateoutput

1. The full scale massrate is too high.

1. Check full scalemass rate (read code11) LBHR.

1. Enter correct fullscale value perparagraph 3.6.4.

13Invalid ratioof linedifferentialpressure tostaticpressure

1. Setting of full scalevalue(s) too high fordifferential linepressure; low zeroscale for staticpressure

1. Check full scalevalue of differentialpressure for individuallines (read codes 231,232, 233, 234 and235) H2O.


14Abnormalvalue for lineextensionfactor

1. Setting of full scalevalue(s) too low fordifferential linepressure and/or lowzero scale for staticpressure.

1. Check full scalevalue of differentialpressure for individuallines (read codes 231,232, 233, 234 and235) H2O.

2. Check zero scalevalue of static pressure(read code 10) PSIA

1. Enter correct fullscale value(s) perparagraph 3.6.1.

1. Enter correct zeroscale value perparagraph 3.6.1.

15Power failureor watchdogtimeout

1. The computer hasexperienced a powerfailure (and possibly arestart) since errorswere last cleared.

1. Enter commandcode 0 and CLR theerror codes.

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16Calculatedfrequencydensitometeroutput out ofrange

1. Calculated densitygreater than densityfull scale.

2. Calculated densityis less than densityzero.

1. Check values forR.C.O. and read code12 (DFS).

2. Check values forR.C.O. and read code13 (DZ).



17-18UNUSED

19Analogdensitygreater thanfull scale


2. Incorrect full scaleentered fordensitometer.

3. Densitometer outputis greater than 102%.

1. Check value of readcode 12 (DOF-LBF3).

1. If read code 0value is less than 12;



20Analogdensity lessthan zeroscale


2. Incorrect zero scaleentered fordensitometer.

3. Densitometer out ofrange, malfunctioningor mis-calibrated,wiring error.

1. Check value of readcode 13 (DOZ-LBF3).

1. If read code 0 valueis less than 13;



SECTION 2 59




21Line 1differentialpressure overrange










1. Check VAR valueof read code 262(H20).

2. Check codenumber entered forCONFIG (systemconfiguration),command code 5.


1. Check wiring.2. Verify density.3. Check transducer.

SECTION 260














1. Check VAR valueof read code 264(H20).

2. Check codenumber entered forCONFIG (systemconfiguration),command code 5.


1. Check wiring.2. Verify pressure.3. Check transfer.

SECTION 2 61











26-28UNUSED

29Excessivetotalizeddisplay rate

1. Totalized rateexceeds capacity ofbuffer accumulator.Flow rate too high,totalizing factor toolow.

1. Check stationtotalizing factor value(TK) per read code 17.

1. Enter a correctedtotalizer factor perparagraph 3.6.5.

30One voltcalibrationerror

1. Possibly 24-voltcircuit is out oftolerance.

1. Check voltage onPC Board 1 with adigital voltmeter for1.000 volt.

Check command code98 for OE4.

1. Adjust 24-voltsupply output for1.000 volt perparagraph 4.2.4.

2. Perform referenceand rate voltagecalibrations perparagraphs 4.3.1 and4.3.2.

SECTION 262




31five voltcalibrationerror

1. Possibly 24 voltcircuit is out oftolerance.

1. Check voltage onPC Board 1 with adigital voltmeter for5.000 volt.

Check command code99 for FIC.

1. Adjust 24-voltsupply output for5.000 volts perparagraph 4.2.4.

2. Perform referenceand rate voltagecalibrations perparagraphs 4.3.1 and4.3.2.

SECTION 2 63



SECTION 264


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 useto control operating capabilities of the computer, instructions for switching fromoperator-entered values to computer-calculated values and vice versa; and operatinginstructions for options available for the Model 2234 computer.

3.2 BASIC CALCULATIONS

Where: WHn = Line hourly mass rate in pounds per hour (LBHR)FBn = Instrument calculated or operator entered line basic

orifice factorFRn = Instrument calculated line Reynolds factorYn = Instrument calculated expansion factorK = Constant 10LKn, and LKn operator entered line totalizing

factorHWn = Measured line differential pressure in inches of waterDEN = Measured or calculated density in pounds per cubic foot

SECTION 3 65


All instrument calculated factors are computed in accordance the 1991 version ofMPMS, Chapter 14.3 (ANSI/API 2530, AGA-3).

_______________________________________________________

NOTE: WHn error is less than 0.01% when process inputs arefixed (operator entered) values.

________________________________________________________

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3.3 OPERATIONAL OVERVIEW

The computer uses a prompting sequence during initial startup. The promptingsequence assists the operator with the entering of essential measurement parameterswhich the computer requires in determining flow rates and flow totals. Details ofthe startup procedures are located in paragraph 2.6 of this manual.

Once the initial startup is complete, the operator may access data, enter additionalparameters, revise previously entered parameters, and request specific computeractions. The two categories of operator control are described as follows. Refer toTables 3-1 and 3-2, Read Codes and Command Codes.

A. The operator may access or enter specific parameters relating to the datameasurement, 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 computedvalue.

Instructions for accessing data are described in detail in paragraph 3.6.

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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 inparagraph 3.7.

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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 forthe new version of software.

Code Literal Mode Units Description Fixed limits

0 DEN F/V LBF3 Density >0.11 TF F/V DEGF Measured Temperature -50 to 250 F2 PF F/V PSIA Measured Pressure 0.0 to 50003 MU F/V CP Fluid Viscosity >0.04 IE FXD -- Isentropic Exponent >0.05 TFS FXD DEGF Full Scale Temperature None6 TZ FXD DEGF Zero Scale Temperature None7 DFS FXD LBF3 Density Full Scale None8 DZ FXD LBF3 Density Zero None9 PFS FXD PSIA Pressure Full Scale None

10 PZ FXD PSIA Pressure Zero None11 MFS FXD LBHR Mass Rate Full Scale >0.012 DOF FXD LBF3 Density Output Full Scale >0.013 DZ FXD LBF3 Density Output Zero >0.017 TK FXD -- Station Totalizing Factor -9 to +918 WHT F/V LBHR Station Total Mass Rate >0.029 TC FXD -- Temperature Coefficient None30 A0 FXD -- Densitometer Scaling Constant None31 A1 FXD -- Densitometer Scaling Constant None32 A2 FXD -- Densitometer Scaling Constant None33 DTC FXD -- Densitometer Temp. Correction None34 CT FXD DEGF Densitometer Cal. Temperature None35 P0 FXD -- Pressure Coefficient None36 K FXD -- Pressure Coefficient None37 DCF FXD -- Densitometer Corr. Factor >0.042 A4 FXD -- Pressure Coefficient None43 A5 FXD -- Pressure Coefficient None44 DLY FXD MSEC Printer Line Delay >0

SECTION 3 69


Table 3-1. Read Codes (Continued)

Code Literal Mode Units Description Fixed Limits

45 DTE FXD -- Day of the Year 1 to 36646 TIM FXD -- Time Of Day 0 to 23:5947 DPT FXD HOUR Daily Print Time 00 to 2348 INT FXD HOUR Print Interval 00 to 2349 ID FXD -- 3-Digit Computer ID 00 to 99950 BUD FXD -- Serial Baud Rate 150 to 240051 P01 FXD -- Printed Data Line 1 Valid CodeThrough82 P32 FXD -- Printed Data Line 32 Valid Code

20n WHn F/V LBHR Line n Hourly Rate >0.021n LFn FXD InH2O Line n Cutoff >0.022n LKn FXD -- Line n Totalize Factor -9 to +923n HFn FXD InH2O Line n DP Full Scale >0.024n IDn FXD INCH Line n Inside Diameter >0.025n ODn FXD INCH Line n Orifice Diameter >0.026n HWn F/V InH2O Line n Differential >0.027n EXn F/V -- Line n Extension >0.028n CDn F/V -- Line n Discharge Coefficient >0.029n Yn F/V -- Line n Expansion Factor >0.030n TLn FXD -- Line n Tap Location 1, 231n FMn F/V -- Line n Mass Flow Factor >0.032n PAn FXD -- Line n Plate Alpha None33n PTn FXD DEGF Line n Plate Measure Temp. >0.034n LAn FXD -- Line n Pipe Alpha None35n LTn FXD DEGF Line n Pipe Measure Temp. >0.036n Bn F/V -- Line n Beta >0.037n Pn F/V PSIA Line n Upstream Pressure >0.0800 RATE LT VAR LBHR Station Total Mass Rate80n RATE Ln VAR LBHR Line n Mass Rate900 TOTL LT VAR LBS Station Total Mass90n TOTL Ln VAR LBS Line n Total Mass

SECTION 370


Table 3-2. Command Code Listing

CommandCode

Title Action ReferenceParagraph

0 DisplayErrors

Causes the consecutive display of errorsby Error Code Number

3.7.2

1 DisplayAlways ON

Causes the display to be ONcontinuously

3.7.1

2 DisplayTimeout

Causes the display to be ON temporarily,(for one minute) and then be replacedwith a blinking asterisk

3.7.1

5 DisplayConfiguration

Causes the display of the configurationtype entered during startup

3.7.3

06m UseDensitometerInput

Selects type of density input for rate andtotals calculations

3.7.1

7 Use API-2565 Instructs the computer to use API-2562density calculation as density input

3.7.1

8 DisplayCalculation time

Causes the display in seconds of thelength of calculations being performedby the computer

3.7.3

12 Disable ErrorCode 8

Turns OFF low temperature alarm 3.7.1

13 Enable ErrorCode 8

Turns ON low temperature alarm 3.7.1

14 Display ErrorCode 8

Causes the display of alarm status forlow temperature

3.7.1

15 Clear PrintTable

Clears all 32 data locations of the PrintTable and replaces with NOT USED

3.8

80n GrossTotal Reset

Resets the flow totals for the station orline (n) selected

3.7.4

SECTION 3 71


Table 3-2. Command Code Listing (Continued)

CommandCode

Title Action ReferenceParagraph

90 Display A/DChannel 0 inHexadecimal

Causes the display of analog inputvoltages in hexadecimal form for benchcalibration

3.7.2

through

97 Display A/DChannel 7 inHexadecimal

Causes the display of analog inputvoltages in hexadecimal form for benchcalibration

3.7.2

98 AutomaticCalibration ofZero Value toOE4 Hexadecimal

Causes the display of the Zero Value ofreference analog circuits

3.7.2

99 AutomaticCalibration of FullScale Value toFIC Hexadecimal

Causes the display of the Full ScaleValue of reference analog circuits

3.7.2

SECTION 372


Table 3-3. Error Codes

Code No. Description

0 Analog density transducer out of range1 Temperature transducer out of range2 Static pressure transducer out of range3 Line 1 differential pressure transducer under range4 Line 2 differential pressure transducer under range5 Line 3 differential pressure transducer under range6 Line 4 differential pressure transducer under range7 Line 5 differential pressure transducer under range8 Indicates product temperature is beyond range of API-2565

(i.e., less than 65oF or greater than 166.9oF)9 Indicates line pressure is beyond range of API-2565 (i.e., less

than 200 psia or greater than 2099.9 psia)10 Total volume incremented faster than 25 HZ11 Invalid ratio of pipe I.D. to orifice diameter12 Rate output overscale13 Ratio of line differential to static pressure greater than 414 Extension less than 515 Power failure of watchdog timeout16 Frequency density transducer out of range19 Measured or calculated density is greater than the full scale

value entered by the operator20 Measured or calculated density is less than the zero value

entered by the operator21 Line 1 differential pressure over range

SECTION 3 73


Table 3-3. Error Codes (Continued)

Code No. Description

22 Line 2 differential pressure over range23 Line 3 differential pressure over range24 Line 4 differential pressure over range25 Line 5 differential pressure over range29 Overflow counts exceed 65,00030 One volt calibration error31 Five volt calibration error

SECTION 374


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 aretemporary during startup. A "power-save" feature is used by the computer to causethe display to remain on for a minute and then be replaced by a blinkingasterisk(*). 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 toreturn 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 formatrequirements. An unacceptable entry causes the computer to display one of severalterms: INVALID, RANGE ER, (Range Error), TOO HIGH, TOO LOW or else torepeat the mnemonic term for the parameter. Enter a new, valid parameter (orRead Code number). The range requirements are described in paragraph 3.6 as partof the instructions for accessing data.

SECTION 3 75


3.4.3 FUNCTIONS OF SPECIFIC KEYS

The front panel keyboard is arranged in two groups of 12 keys each. Thenumerical keys, the period (.) and the dash or minus (-) on the left are used to enterdata values or issue instructions to the computer through the Read/CommandCodes. The group of keys on the right enters functions, changes the display, orinitiates a computer action. A summary of the key functions are described asfollows. A more detailed description of the functions are described in subsequentparagraphs of this manual.

A. Enter (ENTR) - Inputs into memory any valid data shown on theAlpha/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 orfunction codes.

D. Read (READ) - Entering a one- two- or three-digit function numerical codeand pressing READ causes the computer to display the data being used orcalculated by the computer (see Table 3-1).

E. Fixed (FXD) - Pressing FXD displays data stored in the computer by theoperator (e.g., pressure, temperature, density, etc.). An asterisk displayedwith the data identifier indicates that the computer is not currently using thedata value for its computations.

SECTION 376


F. Variable (VAR) - Pressing VAR displays data from a transducer or acomputer calculation. An asterisk displayed with the data identifier indicatesthat the computer is not currently using the data for its computations.

G. Clear (CLR) - Pressing CLR removes entered data values from the datacode display and displays "0.0".

H. Command (CMD) - Entering a one-, two- or three-digit numerical code andpressing CMD causes the computer to execute the specified command (seeTable 3-2). These commands include the display of errors and the resettingof 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 datacode. For example, if the data corresponding to the Read Code 2 isbeing viewed, pressing↑ causes the computer to display the datacorresponding to Read Code 1.

2. Entering data -↑ indicates to the computer that the data to follow isan exponent (e.g., 2↑ 5 = 2 x 105 = 200,000).

J. Down Arrow (↓) - Pressing↓ causes the computer to step forward to thenext data code; reverses the action in↑.

K. Print (PRNT) - Pressing PRNT initiates operator selected data output to anexternal printer.

SECTION 3 77


3.4.4 INDICATORS

Indicators other than the keyboard and LED display consist of three statusindicators 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., atransmitter over-ranges) and is OFF when the condition ceases to exist.

The amber indicator is ON when the out-of-tolerance condition, which causes thered indicator to light, is entered by the computer into the error memory list. Theamber indicator remains lighted until all error conditions have ceased and theoperator 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 PCBoard No.1 is in the "enable" position. The green indicator being ON indicatesthat the operator can enter or alter any of the respective measurement parameterswhen the operator entry "enable/disable" switch, in the "disable" position, causesthe computer to display ENABLE at any attempt by the operator to enter or alterthe measurement parameters.

The operational six-digit electromechanical counter on the front panel displays thegross, net, or mass flow total that is selected during the Startup PromptingSequence.

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3.5 DATA INPUT AND OVERRIDING CONTROLS

The values of the parameters used by the Model 2234 are derived from twosources.

A. Line parameter measurements being monitored by the computer, orcalculations performed by the computer, are called variable or VAR valuessince they change as line or calculation conditions change.

B. Operator-entered parameter values are called fixed or FXD values since theydo not change.

Some parameters can be only a measured or a calculated value, some can beonly an operator-entered value, and some parameters can be either ameasured or an operator-entered value. Only one value can be actively usedin the computer computations. The operator can select and switch to which-ever type of value (measured/calculated or operator-entered) that is to beactive. Generally, an operator-entered parameter value is used in lieu of ameasured value when a problem occurs, such as when a line transmitter ismalfunctioning and is being removed for repair or replacement.

When the operator enters an access data code (Read Code) into thecomputer, 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 valueof the inactive parameter. Note that the inactive value is indicated by anasterisk (*) located between the parameter mnemonic and the term, FXD orVAR, e.g., "TF * FXD".

SECTION 3 79


3.5.1 ENTERING AN OPERATOR - SELECTED VALUE

Set the "enable/disable" switch on PC Board No.1 to the "enable" position in orderto enter parameter values. Return the switch to the "disable" position after makingentries to prevent unauthorized or accidental data entries.

Verify the value entered into the computer during startup. Press the data codeaccess number(s) (Read Code) and then READ. If the measured value is beingused by the computer, press FXD to display the operator-entered value being heldinactive.

Enter the desired value. Press ENTR. The display will show OK to indicate thatthe 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 - ENTEREDVALUES

A. Assume that the temperature transducer in the line is suspected ofmalfunctioning. Assume also that the transducer will need to be removed forrepair while the system is flowing.

First examine the transducer output. The Read Code for monitoring atemperature transducer is 1 in this example.

Key Display

1 (Basic Read Code) 1READ (Pressed) TF VAR (Variable)READ (Released) DEGF (Units of Measure)

then

56.3 (Temperature)

SECTION 380


B. Next, assume that the temperature for the line is known to be approximately78 degrees (the VAR 56.3 degree temperature reading verifies that thetransducer output is inaccurate) so a 78 degree temperature will need to beentered into the computer as a FXD value for the computer to use in itscalculations until the defective transducer can be returned to service.

Examine the current inactive FXD value:

Key Display

FXD (Pressed) TF * FXD (Fixed)FXD (Released) DEGF (Units of Measure)

then0.00

C. The asterisk (*) between TF and FXD indicates that this value is not active(not being used by the computer for flow computations). Instead, thecomputer is using the 56.3 VAR output from the defective transducer. Thecurrent FXD value is "0.00".

Enter a new FXD value of 78 degrees

Key Display

7 78 78ENTR TF * FXD (Fixed)

DEGF (Units of Measure)then

78.0

SECTION 3 81


D. Switch the value of the temperature from VAR to FXD. Press ENTR again.

Key Display

ENTR (Pressed) TF FXDENTR (Released) OK (Valid Entry)

thenDEGF (Units of Measure)

then78.0

The value being displayed (VAR or FXD) is entered into the computercalculations by pressing ENTR. (In the example above, FXD was the lastvalue type displayed before pressing ENTR to enter the 78 degrees, soENTR was pressed twice; once to enter the temperature as the inactive FXDvalue and a second time to enter the inactive FXD value into the computeras the active value).

Note that the display of TF FXD contains no asterisk, signifying that theFXD value is now the active value being used for flow computations.

SECTION 382


E. Next, assume that the transducer is repaired or replaced and is ready to bereturned to use. Switch the temperature from the active FXD value to theinactive 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 degreeFXD value entered previously.

Next, view the current VAR value:

Key Display

VAR (Pressed) TF VAR (Variable)VAR (Released) DEGF (Units of Measure)

then76.4

Note that for the example, the VAR value is now 76.4 degrees and theasterisk signifies that the value is not active (not being used for flowcomputation).

Press ENTR to make VAR the active value:

Key Display

ENTR TF VAR (Variable)thenOK

thenDEGF (Units of Measure)then76.4

OK signifies that the entry of the VAR value was accepted and theabsence of the asterisk indicated that the VAR value is now beingused for flow computations.

SECTION 3 83


3.6 DATA ACCESS

As stated in the Operational Overview part of this section of the manual, theoperator 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) valueas 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 todifferent operational functions. A numerical listing of the related accesscodes (Read Codes) appears in Table 3-1. A code-by-code description of theRead Codes appears in Appendix A at the back of this manual.

Data request group descriptions appear in the following order, starting inparagraph 3.6.1:

A. Transducer Scaling.B. Measurements.C. Operator Entered Data ConstantsD. Computer Calculated Variables.E. Output Scaling.F. Overrides.

Other operational functions are described elsewhere in this manual. Referto the Table of Contents to determine their location.

SECTION 384


3.6.1 TRANSDUCER SCALING

Read Codes for transducer scaling will display the full scale and zero values thatare used by the computer to scale measured input signals from the respectivetransducers. Transducer scaling is displayed only as FXD values. The values maybe changed by the operator by keying in the new values and pressing ENTR.

A. Temperature Transducer Full Scale (TFS) - Read Code 5Temperature Transducer Zero (TZ) - Read Code 6

Full scale and zero temperature values, used by the computer to scaleinput signals from the temperature transducer, are displayed by usingRead Codes 5 and 6. Temperature is displayed in degrees Fahrenheit.

B. Densitometer Full Scale (GFS) - Read Code 7Densitometer Zero (GZ) - Read Code 8

Full scale and zero density values, used by the computer to scale inputsignals from the analog densitometer, are displayed by using ReadCodes 7 and 8. Density values are displayed in LBF3 (pounds percubic foot).

SECTION 3 85


C. Static Pressure Transducer Full Scale (PFS) - Read Code 9Static Pressure Transducer Zero (PZ) - Read Code 10

Full scale and zero pressure values, used by the computer to scaleinput signals from the pressure transducer, are displayed by usingRead 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 scalepressure differential in line number (n), is displayed by using ReadCode 23n. Pressure is displayed in inches of water. FXD valuesgreater than zero are acceptable.

Refer to Field Wiring Diagram, DE-9144, for the definition of thetransducer per configuration selected.

3.6.2 MEASUREMENTS

Read Codes for measurements display measured input values used by the computerin calculation of the flow rates and flow totals. Measurements are displayed asVAR values. The values may be changed to a FXD value by the operator. Referto paragraph 3.5.2.

A. Measured Density (DEN) - Read Code 0

The measured specific density value, used by the computer to calculate flow ratesand 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 than0.1 are acceptable.

SECTION 386


B. Temperature (TF) - Read Code 1

The measured temperature value, used by the computer to calculate flow rates andflow totals, is displayed by using Read Code 1. The display is in degreesFahrenheit. 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 ratesand flow totals, is displayed by using Read Code 2. The pressure is displayed inPSIA. 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 masstotals, is displayed by Read Code 26n for the line selected (n). Pressure isdisplayed in inches of water. FXD values between 0 and 1000 inches of water areacceptable for testing purposes only.

SECTION 3 87


3.6.3 OPERATOR-ENTERED DATA CONSTANTS

Read Codes for operator-entered data constants display the values of those datawhich generally remain constant. Data such as orifice diameter, line ID, and linetap location are displayed as FXD values. The values may be changed by theoperator 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 linemass flow, is displayed for line number (n) by using Read Code 24n.The value is displayed in inches. FXD values between 1.0 and 50.0inches are acceptable.

B. Line Orifice Diameter (ODn) - Read Code 25n

The line orifice diameter value, used by the computer for calculatingmass flow, is displayed for line number (n) by using Read Code 25n.The value is displayed in inches. FXD values between 0.2 and 40inches are acceptable.

C. Line Tap Location (TLn) - Read Code 30n

The location of the line tap for the selected line number (n) isdisplayed by using Read Code 30n. The display will show 1(upstream) or 2 (downstream).

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3.6.4 COMPUTER CALCULATED VARIABLES

Read Codes for the computer calculated variables cause the display of the valuescomputed from various other calculations. All computer calculated variables aredisplayed 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 bedisplayed by using Read Code 11. The rate is displayed in LBHR. OnlyFXD 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 beentered for testing purposes only. FXD value entries will affect flow totalsif 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 byusing Read Code 20n. The rate is displayed in LBHR. FXD values from0.0 and above may be entered for testing only. FXD value entries will effectflow 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 flowcomputer will assume a flow rate of zero.

SECTION 3 89


E. Line Extension (EXn) - Read Code 27n

The extension factor for a selected line number (n), used by the computer tocalculate the Reynolds factor for the line, may be displayed by using ReadCode 27n. The line extension display is the square root of(HWn x PF). FXD values of any positive real number can be entered fortest purposes only. FXD value entries will affect flow totals if the computeris on-line.

F. Line Discharge Coefficient (CDn) - Read Code 28n

The discharge coefficient is calculated by the flow computer in accordancewith procedure 3.2.9 of Chapter 14.3.4 of the Manual of PetroleumMeasurement Standards, May 6, 1991. FXD values from 0.0 and above maybe 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 byusing Read Code 29n. FXD values from 0.0 and above may be entered fortesting purposes only. Typical values may be between 0.87 and 1.04.

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H. Mass Rate (RATE Ln) - Read Code 80n

Read Code 80n is used to display the mass flow rate as measured through the lineselected where n = 1, 2, 3, 4, or, 5 through the station (n = 0). Flow rate isdisplayed as a VAR value.

A typical mass flow rate Read Code entry and display is shown as follows:

Key Display

8 80 (Base Read Code) 801 (Line No.) 801 Line 1READ (Pressed) TOTAL L1 (Base unit of measure)READ (Released) LBHR E0

then [A power of ten (totalizing00000000 factor) that is multiplied by

the base unit of measure, i.e.,LBHR times 10 to the zeropower (E0) = LBHRtimes 1.]

Line and StationIdentification

LT = StationL1 = Line 1L2 = Line 2L3 = Line 3L4 = Line 4L5 = Line 5

SECTION 3 91


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 aredisplayed as a VAR value.

A typical flow total Read Code entry and display is shown as follows:

Key Display

9 90 (Read Code) 901 (Line No.) 901 Line 1READ (Pressed) TOTAL L1 (Base unit of measure)READ (Released) LBS E0

then [A power of ten (totalizing00000000 factor) that is multiplied by

the base unit of measure, i.e.,LBS times 10 to the zeropower (E0) = LBS times 1.]



SECTION 392


3.6.5 OUTPUT SCALING

Read Codes are used to display the analog output scaling for full scale and zerodensity; 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 thescaling rates and totalizing factors by keying in the values and pressing ENTR.

A. Density Output Full Scale (DOF) - Read Code 12Density Output Zero (DOZ) - Read Code 13

The full scale and zero values for the density analog output may bedisplayed 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 thestation totalization is displayed with the use of Read Code 17. FXD entryof integer exponent values between -9 and +9 are acceptable (refer toparagraph 2.6.3.1 for details pertaining to totalizer scaling). The value maybe changed by the operator keying in the values and pressing ENTR.

If no exponent is entered to factor the totals, the computer uses a totalizingfactor of 10o.

SECTION 3 93


C. Line Totalizing Factor (LKn) - Read Code 22n

A power of ten multiplier (the totalizing factor) that is being applied to thetotal 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 toparagraph 2.6.3.1 for details pertaining to totalizer scaling). Key in thevalues and press ENTR.

If no exponent is entered to factor the totals, the computer uses a totalizingfactor of 10o.

3.6.6 OVER-RIDES

Calculation required for product other than mass flow will need to be entered intothe computer as FXD values by the operator. (Refer to paragraph 3.10).

SECTION 394


3.7 COMPUTER ACTION REQUESTS

As stated in the Operational Overview portion of Section 3 of this manual, theoperator 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 applyto different operational functions. A numerical listing of the Command Codesappear in Table 3-2. Set the "enable/disable" switch to the "enable" position toperform all actions, except as noted for each specific Command Code.

The group descriptions appear in the following order, starting inparagraph 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. Referto the Table of Contents to determine their location.

SECTION 3 95


3.7.1 OPERATIONAL ACTIONS

Command Codes pertaining to the computer operation are used to change or controlthe computer operation after initial startup.

A. Display Always ON - Command Code 1Display Timeout - Command Code 2

Command Code 1 causes the display to be ON continuously. CommandCode 2 causes the display to be ON for one minute and then to go off withthe displayed terms replaced by a blinking asterisk(*).

B. Use Densitometer Input - Command Code 06Use Densitometer Input - Command Code 06m

The computer contains only one of the 06 Command Codes for densitometerinput. Refer to the program option.

Command Code 06 instructs the computer to use the analog densitometerinput, or the operator-entered FXD value if no densitometer is used, for rateand totalization calculations. The computer will acknowledge this CommandCode only if the "enable/disable" switch is in the "enable" position (greenLED illuminated).

m = 1 Analog or no densitometerm = 2 API-2565m = 3 Frequency, Solartron typem = 4 Frequency, Barton typem = 5 Frequency, Agar type

SECTION 396


C. Use API-2565 - Command Code 7

Command Code 7 instructs the computer to use density as calculated fromtemperature and pressure in the rate and totalization calculation. Thecomputer will acknowledge this command code if the "enable/disable" switchis 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 LowTemperature Alarm (Error Code 8). The computer will acknowledge thiscommand 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 (ErrorCode 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 LowTemperature Alarm (Error Code 8). The display is shown as ER8 ENA ifthe alarm is enabled; as ER8 DIS if the alarm is disabled. The computerwill acknowledge this command even if the "Enable/Disable" switch is in the"Disable" position.

SECTION 3 97


3.7.2 DIAGNOSTIC AID ACTIONS

Diagnostic Aid Actions enable the operator to visually monitor or verify suspectedproblem areas. All of the Diagnostic Aids, except Command Code 0, are used onlyin 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. Referto 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 errorcondition has been entered into the computer error memory, even if the errorno longer exists. The amber indicator remains ON until the operator clearsthe 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 numericalsequence. Press CLR to acknowledge and clear an error from the memorylist. The computer automatically advances the display to the next errornumber.

When the error conditions no longer exist, and when all of the error codesin the memory list have been acknowledged, the amber status light turnsOFF.

SECTION 398


B. Display A/D Channel 0 in Hexadecimal - Command Code 90Display A/D Channel 1 in Hexadecimal - Command Code 91Display A/D Channel 2 in Hexadecimal - Command Code 92Display A/D Channel 3 in Hexadecimal - Command Code 93Display A/D Channel 4 in Hexadecimal - Command Code 94Display A/D Channel 5 in Hexadecimal - Command Code 95Display A/D Channel 6 in Hexadecimal - Command Code 96Display A/D Channel 7 in Hexadecimal - Command Code 97

Command Codes 90 through 97 display analog input voltages in hexadecimalform for bench calibrations and software diagnostic testing. They are notapplicable for field use.

C. Automatic Calibration of Zero Value to 0E4 Hexadecimal - Command Code98

Automatic Calibration of Full Scale Value to F1C Hexadecimal - CommandCode 99

Command Codes 98 and 99 display the zero and full scale values ofreference 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 (RandomAccess Memory) integrated circuit (IC) chips are used to store the calculatedrates and totals, as well as other data which changes value. PROM(Programmable Read Only Memory) IC’s are used to permanently hold theunchanging program instructions that calculate the data values stored inRAM.

SECTION 3 99


The Model 2234 performs diagnostic checks on both the RAM and thePROM memories to insure the reliability of the calculations performed andthe safe storage of the resulting data. If a memory failure occurs, the systemhalts all flow calculations because their reliability would be uncertain. Adiagnostic message is displayed on the front panel in the form MEM XX00where 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 keysto clear all memory and start a configuration (CNFIG) prompting sequence.

The PROM memory diagnostic check is run every ten seconds during normaluse of the computer.

The diagnostic test runs successfully even if all RAM memory fails andnearly all PROM memory fails. All that is required is that the small sectionof PROM memory containing the diagnostic routines be operable. If thisportion of memory fails, the system "watchdogs" (causing the indicator lightson the front panel to blink) halts further processing.

Even though the system ceases to calculate rates and totals upon detectinga memory failure, the diagnostic test continues to run. If the memory checksout good on the next pass, the system is allowed to resume processing as ifa temporary power failure has occurred.

In the event of PROM memory failure, all measurement data is maintainedin RAM memory. To access this information, correct the PROM memoryproblem by replacing the defective chip.

SECTION 3100


Table 3-4. Address vs. IC Chip (DE-8992 series)

AddressedDisplayed

Type ofMemory

On PCBoardNumber

I C Number

none

08001000180020002800

7000740078007C00

8000880090009800A000A800B000B800

PROM

PROMPROMPROMPROMPROM

RAMRAMRAMRAM

PROMPROMPROMPROMPROMPROMPROMPROM

1

11111

1111

22222222

U12 (Failurecauseswatchdog)U3U13U4U14U5

U19 AND U20U24 AND U25U31 AND U32U37 AND U38

U11U12U15U16U17U19U20U21

SECTION 3 101


Table 3-4A. Address vs. IC Chip (DE-10421 series)

AddressedDisplayed

Type ofMemory

On PCBoardNumber

I C Number

none

0800100018002000

7000740078007C00

8000880090009800A000A800B000B800

PROM

PROMPROMPROMPROM

RAMRAMRAMRAM

PROMPROMPROMPROMPROMPROMPROMPROM

1

1111

1111

22222222

U12A (Failurecauseswatchdog)U3AU13AU4AU14A

U19 AND U20U24 AND U25U31 AND U32U37 AND U38

U11U12U15U16U17U19U20U21

SECTION 3102


3.7.3 PARAMETER DISPLAY ACTIONS

The parameter display Command Codes used to display the values of parametersset into the computer during initial startup.

A. Display Configuration - Command Code 5

The type configuration entered by the operator during initial startup may bedisplayed with the use of Command Code 5. The display of the configurationappears as shown below when Command Code 5 is entered into the computer.

CONFIGthenCFG y z

where:

x = Density type (DENTYP) selectedDENST A for analog densitometerAPI 2565 for API calculatedDENST Fw for frequency densitometer input(w = Level 1, 2, or 3)

y = Number of meter tubes and their stackconfiguration

z = Tap Type being usedFT for Flange Tap

SECTION 3 103


The configuration type can be changed only by erasing all startup parameters frommemory and repeating the Startup Prompting Sequence as described inparagraph 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 isdisplayed by using Command Code 8. The display is in seconds.

SECTION 3104


3.7.4 CLEARING ACTIONS

A. Mass Total Reset - Command Code 80n

The mass flow totals related to the selected line number (n) wheren = 1, 2, 3, 4, or 5, or to the station (n=0), are reset by the use ofCommand Code 80n. A typical line total reset is entered anddisplayed as in the following example:

Key Display

8 80 (Basic Command 80

Code)1 (Line No.) 801CMD Clear L1 (Gross Total Reset -

Line 1)ENTR OK

thenREADY



SECTION 3 105


3.8 SERIAL OUTPUT FOR PRINTING

The Serial Output Option allows the operator to output the process informationstored 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 fullyautomatic printout in addition to either local keyboard or remote contact closurecommands.

Temporary memory storage locations are used when storing data to be printed,thereby eliminating any significant time skew of data due to speed limitations ofthe printer.

SECTION 3106


Table 3-5. Serial Output Read

Read CodeandMnemonicIdentifier

Read CodeDescription

ReferenceParagraph

44-DLY45-DTE46-TIM

47-DPT48-INT49-ID50-BUD51-P01 *52-P02 *53-P03 *

Print delayDate - day of yearReal time clock-hours/minutesData print time-hour of dayPrint interval-hourPrinted identification numberPrinted baud rate-bit ratePrint location 01-data *Print location 02-data *Print location 03-data *

through

Print location 32-data *

3.8.23.8.3

3.8.43.8.53.8.63.8.73.8.83.8.93.8.93.8.9

3.8.9

* Data may be:

A. Any valid Read Code.B. Blank line by entering "-" which is the keyboard negative symbol, will

provide single line spacing between data groups.C. "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" byusing Command Code 15. Read Codes 45 through 50 are unaffected by thisfunction.

SECTION 3 107


3.8.1 READ CODE USAGE

Read Codes (Tables 3-1 and 3-5) allow the operator to display or entermeasurement parameters to be printed.

The internal "enable/disable" switch must be set to the "enable" position beforeentering 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. Thedelaying time is used by the computer to allow the printer to return carriage for thenext line of data to be printed. FXD values between 2 and 99 (X100) areacceptable. The delay time defaults to 2 if no value is entered.

Such a delay is required for proper interface with printers which do not incorporatememory. Consult the printer operation manual to determine if a delay is requiredand if so, how much.

Example:

A delay time of "5" is entered by the operator. The carriage return time, then, isapproximately 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 ReadCode 45. Acceptable operator entry values are 001 through 365, (preceding zerovalues are not mandatory). If the day entered is 366, the unit will roll over to 0.

SECTION 3108


3.8.4 REAL TIME CLOCK (TIM) - READ CODE 46

The hour and minute entries are displayed by using Read Code 46. Hour entriesalways precede minute entries and must be separated by a "-" operator key entry.Hours are displayed according to the National Bureau of Time Standard, where 5p.m. is represented as the 17th hour and so would be entered at 17. Seconds arenot displayed. However, the internal seconds register is reset to zero with eachnew time entry. Acceptable operator entry values for hours and minutes are 00 -00through 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 ReadCode 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 3.8.4and 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 timebetween successive printouts (Read Code 48) is set for 05 hours.

Print times are:

06, 11, 16, 21, 0206, 11, 16, 21, 02etc, hours

If both the print time and the interval time are set to 00, no automatic printoutoccurs. Acceptable operator entries are 00 through 24.

SECTION 3 109


3.8.7 IDENTIFICATION (ID) - READ CODE 49

Read Code 49 displays the computer numerical identification. Acceptable operatorentries 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 oftransmission of either a "1" or "0" bit. Acceptable operator entries for the baudrate are 150 through 2400. The computer automatically selects a baud rate of 300if no operator entry is made.

The Model 2234 hardware and software is two-wire, RS-232C compatible and isspecifically designed to interface with an Anadex DP1010 series, 40 columnprinter. Due to printer speed limitations, the Model 2234 computer will output onecharacter every 20 msec regardless of the baud rate selected.

The baud rate selected for the Model 2234 must match the designed baud rate ofthe 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 printoutis identical to the order of operator entry. Acceptable operator entries are detailedin the notes of Table 3-5.

SECTION 3110


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 entriesare "NOT USED", only Line No.1 (ID, date and time) is printed.

Sample Printout

Read Code FunctionDescription

EngineeringUnits andMultipliers

NumericData

Print table(26 linesare notused)

ID 789 DATE800 RATE801 RATE802 RATE900 TOTAL901 TOTAL902 TOTAL

045LTL1L2LTL1L2

TIME 14-00LBHR E0LBHR E0LBHR E3LBS E0LBS E0LBS E3

000000416740041028500008972

SECTION 3 111


3.9 FREQUENCY DENSITOMETER OPTION

The frequency densitometer option enables the computer to determine line densityfrom a frequency output type of densitometer.

The densitometer signal frequency is determined by the computer periodicallyreading the densitometer input counter and storing the total of accumulated pulses.The pulses are accumulated for 18 seconds to attain satisfactory resolution. Arunning average technique in the computer registers allows the calculated densityto be updated at three second intervals.

The computer calculates the corrected density in LBF3. The corrected density isdisplayed using Read 0. Entering a FXD (operator entered) value provides an over-ride of the calculated value.

3.9.1 CALCULATIONS

The computer calculates the corrected density in accordance with the followingequations. The Read Codes for entering the required terms (constants) to completethe 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 zeroupon computer cold start unless otherwise noted.

SECTION 3112


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 and32 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


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 = Factor for converting from gm/cc to LBS/cf.

SECTION 3114


3.9.2 PROMPTING SEQUENCE

The Startup Prompting Sequence contains only one prompting entry (DENTYP) forthe Frequency Densitometer option. DENTYP appears immediately followingCNFIG, the first entry in the sequence. Acceptable entries for DENTYP are:

Code Description

1 Analog, or no densitometer input2 Use API-2565 for density calculation3 Frequency densitometer, Solartron type or UGC type4 Frequency densitometer, Barton type5 Frequency densitometer, Agar type

SECTION 3 115


3.9.3 CONSTANTS

The operator must enter 11 constants from the front panel keyboard. These entriesare not prompted by the computer display. (See Table 3-6.)

* Ten constants are defined as fixed-only system constants and will default to zeroupon computer cold start unless otherwise noted. Such items as Read Codes 44through 82 (date, time, print codes, etc. will need to be entered; however, theprograms will be run without these items.

** This constant is defined as fixed-only constant and will default to one (1) uponcomputer cold start unless otherwise noted.

Read Codes, display mnemonic terms and engineering unit display terms aredefined as follows:

Table 3-6. Fixed Only Constants

Read Eng.Code Literal Units Description

*29 TC None Densitometer Temperature Coefficient*30 A0 None Densitometer Scaling Constant*31 A1 None Densitometer Scaling Constant*32 A2 None Densitometer Scaling Constant*33 DTC None Densitometer Temperature Coefficient*34 CT DEGF Densitometer Calibration Temperature*35 PO None Densitometer Pressure Coefficient*36 K None Densitometer Pressure Coefficient**37 DCF None Densitometer Correction Factor*42 A4 None Densitometer Pressure Coefficient*43 A5 None Densitometer Pressure Coefficient

Valid entries for constants are any real number. Value display is left unjustified.

SECTION 3116


3.9.4 EXAMPLES

3.9.4.1 SOLARTRON DENSITOMETERS

From the densitometer calibration certificate the following is determined:

1. Units of calibration are: KG/M3

2. Calibration temperature is: 20oC3. Calibration pressure is: 1 BAR4. Coefficient data is:

K0 = -1112.63K1 = -0.729462K2 = -4.08188 E-03K18 = -4.9619 E-05K19 = -0.021627K20A = -3.857 E-05K20B = -4.47 E-08K21A = -0.04663K21B = -1.2074 E-03

SECTION 3 117


Step 1

Compute, using a hand calculator, the equivalent coefficients for density units ofgm/cc, temperature units ofoF and pressure units of PSI from the followingrelationships:

Ao = K0 ÷ 1000A1 = K1 ÷ 1000A2 = K2 ÷ 1000

CT = Cal Temp x 9/5 + 32TC = K18 x 5/9

SECTION 3118


* If no values are given on the calibration certificate for K20B or K21B, A4 andA5 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 samplecoefficients given above, the proper entries would be as follows:

A0 = -1.11263 Read Code 30A1 = -7.29462↑ -4 Read Code 31A2 = 4.08188↑ -6 Read Code 32DTC = -1.2015↑ -5 Read Code 33CT = 68 Read Code 34TC = -2.7566↑ -5 Read Code 29P0 = -1.20897 Read Code 35K = -2.65931 Read Code 36A4 = 2.12494↑ -4 Read Code 42A5 = -5.7397↑ -3 Read Code 43

Exercise care to insure applicable units consistency when using the above or similarrelationships. The constants A0, A1, A2 must be entered so as to yield density ingm/cc.

SECTION 3 119


3.9.4.2 BARTON DENSITOMETERS

From the densitometer calibration certificate the following is determined:

1. Units of calibration are: gm/cc2. Calibration temperature is: 70oF3. Calibration pressure is: 14.7 PSI4. Coefficient data is:

A = 7.4145B = 0.6917

5. Equation from data sheet is:

Pressure coefficient = +0.0014 GM/cc/1000 PSITemperature coefficient = -0.0054 GM/cc/100oF

SECTION 3120


Step 1

Compute the equivalent coefficients using the following relationships:

A0 = -BA1 = 0.0A2 = ADTC = Temperature coefficient ÷ 100CT = 70TC = 0.0P0 = 0.0

A4 = 0.0A5 = 0.0

Step 2

Enter the results obtained using the appropriate Read Codes. For the samplecoefficients given, and assuming 0.5 gm/cc density, the proper entries would be asfollows:

A0 = -0.6917 Read Code 30A1 = 0.0 Read Code 31A2 = 7.4145 Read Code 32DTC = -5.4↑ -5 Read Code 33CT = 70 Read Code 34TC = 0.0 Read Code 29P0 = 0.0 Read Code 35K = 2.8 Read Code 36A4 = 0.0 Read Code 42A5 = 0.0 Read Code 43

SECTION 3 121


Exercise care to insure applicable units consistency when using the above or similarrelationships. The constants A0, A1, A2 must be entered so as to yield density ingm/cc.

3.9.4.3 AGAR DENSITOMETERS

From the densitometer calibration certificate, the following is determined.

1. Units of calibration are: LB/ft3

2. Calibration temperature is: 20.8oC3. Temperature coefficient: -0.000298 µsec/oC4. Calibrated span in LB/ft3 is: 205. Calibrated span in µsec is: 116.0506. Coefficient data is:

T0 = 195.048 µsecD0 = 10.2701 LB/ft3

K = 1.2425

SECTION 3122


Step 1

Compute, using a hand calculator, the equivalent coefficients for density units ofgm/cc and temperature units ofoF from the following relationships:

A0 = D0(K-2)/62.42778

TC = 0.0K = 0.0P0 = 0.0A4 = 0.0A5 = 0.0

SECTION 3 123


Step 2

Enter the results obtained using the appropriate Read Codes. For the data given,the proper entries would be as follows:

A0 = -1.24618↑-1 Read Code 30A1 = -4.09069↑-4 Read Code 31A2 = 5.37292↑-6 Read Code 32DTC = -4.5704↑ -7 Read Code 33CT = 69.44 Read Code 34TC = 0.0 Read Code 29P0 = 0.0 Read Code 35K = 0.0 Read Code 36A4 = 0.0 Read Code 42A5 = 0.0 Read Code 43

SECTION 3124


3.9.5 COMMAND CODES

Command Code 5 (Display Configuration) displays the type of densitometer andthe type of densitometer input being used, as selected by the operator during theStart-up Prompting Sequence. The display is formatted as follows:

A. If using analog or Frequency Densitometer

(1) CNFIG(2) DENST yz(3) CFG x w

Where:

x = Configuration Code (1, 2, 3, 4, or 5)y = type of densitometer input

(A = analog, F= frequency)z = type of densitometer used

(1, 3, 4, or 5) paragraph 3.9.2w = FT = flange tap

B. If using API-2565, (2) DENST yz is replaced by API-2565. The type ofdensitometer in use may be changed by using Command Code 06m. Referto 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 thefrequency densitometer calculation. Error Code 16 signals the calculated density(in LBF3) is outside the range identified by DFS and DZ.

SECTION 3 125


3.10 CALCULATIONS - EACH METER

Equations/calculation methods contained herein are based upon API Manual ofPetroleum Measurement Standards, Chapter 14, Section 3, Part 4. In the event ofdiscrepancies the API document shall have precedence.

A. Orifice Diameter

d = OD [1 + PA (TF - PT)]

where,d = Corrected orifice diameter, inches at TF

OD = Measured orifice diameter, inches at PTPA = Plate coefficient of thermal expansionTF = Measured fluid temperature, degrees FPT = Plate measurement temperature, degrees F

SECTION 3126


B. Pipe Diameter

D = ID [1 + LA (TF - LT)]

where,D = Corrected pipe diameter, inches at TFID = Measured pipe diameter, inches at LTLA = Pipe coefficient of thermal expansionTF = Fluid temperature, degrees FLT = Pipe measurement temperature, degrees F

C. Beta

B = d/D

where,B = the computed Beta ratio at TFd = Corrected orifice diameter, inches at TFD = Corrected pipe diameter, inches at TF

SECTION 3 127


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 = Upstream Static Pressure, PSIATLn = Tap location; 1 = upstream,

2 = downstreamn = meter tube number

PF = Measured pressure, PSIAHW = Measured differential pressure, InH2O

E. Expansion Factor for Compressible Fluids

Y = 1 - {(0.41 + 0.35 B4)/IE} [HW/(27.707 P)]

where,Y = Expansion factor per E. aboveB = Beta as computed in C. aboveIE = Isentropic exponent, operator enteredHW = Measured differential pressure, InH2OP = Upstream static pressure per D. above

SECTION 3128


F. Velocity of Approach Factor

EV = 1/(1-B4)1/2

where,EV = Velocity of Approach FactorB = Beta as computed in C. above

G. Mass Flow Factor

FM = NC (Pi/4) EV d 2

where,FM = the Mass Flow FactorNC = 323.279 [Reference Table 4-5, MPMS 14.3.4]Pi = the Number PiEV = the Velocity of approach factor per F. aboved = corrected orifice diameter per A. above

SECTION 3 129


H. Orifice Flow Coefficients

A0 = 0.5961 S1 = 0.0049A1 = 0.0291 S2 = 0.0433A2 = -0.229 S3 = 0.0712A3 = 0.003 S4 = -0.1145A4 = 2.8 S5 = -0.2300A5 = 0.000511 S6 = -0.0116A6 = 0.021 S7 = -0.5200

S8 = -0.1400

L1 = L2 = 1.0/D, where D is from step B. above

M2 = 2 L2 / (1 - B), where B is from step C. above

Tu = [S2 + S3 e -8.5L1 + S4 e -6.0L1] [B4/(1 - B4)]

TD = S6 (M2 + S7 M21.3) B1.1

Ts = 0.0, if D > A4

Ts = 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

SECTION 3130


I. Viscosity of Ethylene

MU = 0.01+ 0.000068* (DEN)2

where:MU is the viscosity in centipoise at TFDEN is the flowing density in pounds-mass/cubic foot

J. Iteration Flow Factor

where:

d = orifice diameterD = pipe diameterY = expansion factorE = velocity of approach factorHW = pressure drop across orificeDEN = flowing fluid densityMU = flowing fluid viscosityNIC = 6.23582 X 10-4 [Reference Table 4-5, MPMS 14.3.4]

SECTION 3 131


K. Orifice Coefficient

Given from H. and J. above.

Cd0 = first orifice coefficient constantCd1 = second orifice coefficient constantCd2 = third orifice coefficient constantCd3 = fourth orifice coefficient constantCd4 = fifth orifice coefficient constantF1 = 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 factorA = 4.343 524 261 523 267B = 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 Reynoldsnumber, according to the formula:

X = F1 / Cd

SECTION 3132


3. Calculate the correlation value of Cd, Fc, at the assumed flow,X, and the derivative of the correlation with respect to theassumed value of Cd, Dc, using the following formulae:

If (X < X c) 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 0.8) B/X +

0.8 Cd3 (A - B/X) X 0.8 + 0.8Cd4 X 0.8

SECTION 3 133


4. Calculate the amount to change the guess for Cd, δCd, using thefollowing formula:

Update the guess for Cd according to:

Cd = Cd - δCd

5. Repeat Steps 2, 3 and 4 until the absolute value ofδCd is lessthan 0.000005.

6. If the value of X is greater than 1.0then set Cd_felse clear Cd_f

SECTION 3134


L. Calculation of Mass Flow Rate

where:

WHT = mass flow rate in LBm /HRFM = mass flow factor from G. aboveY = expansion factor from E. aboveCd = orifice coefficient from K. aboveDEN = density from API-2565, densitometer or operator

entry, Lbm /FT3

HW = 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. Thesubsequent display/keying sequence is as follows:

SECTION 3 135


Display Display Definition

1. CNFIG Enter System Configuration Code Number (1-11)2. DENTYP Enter Densitometer Type (1,2,3,4 or 5)3. ENTER IE Enter Isentropic Exponent4. ENTER TFS Enter Full scale for Measured Temperature in degrees F5. ENTER TZ Enter Zero Scale for Measured Temperature in degrees F6. ENTER DFS Enter Full Scale for Measured Density in Pounds per Cubic Foot7. ENTER DZ Enter Zero Scale for Measured Density in Pounds per Cubic Foot8. ENTER PFS Enter Full Scale for Measured Static Pressure in PSIA9. ENTER PZ Enter Zero Scale for Measured Static Pressure in PSIA

10. ENTER MFS Enter Full Scale Mass for Station Rate in LB/HR11. ENTER DOF Enter Full Scale Density Output in LB/CF12. ENTER DOZ Enter Zero Scale Density Output in LB/CF13. ENTER TK Enter Station Totalizing Factor14. ENTER LF1 Enter Low Flow Cutoff for Line 1 (InH20)15. ENTER LK1 Enter Totalizing Factor for Line 116. ENTER HF1 Enter Full Scale Measured Differential Pressure for Line 1 in Inches of

Water17. ENTER ID1 Enter Inside Diameter of Meter Tube for Line 1 in Inches18. ENTER OD1 Enter Orifice Diameter of Meter Tube for Line 1 in Inches19. ENTER TL1 Enter Pressure Tap Location for Line 1 (1=Upstream, 2=Downstream)20. ENTER PA1 Enter Line 1 Plate Expansion Coefficient21. ENTER PT1 Enter Line 1 Plate Measurement Temperature (DEGF)22. ENTER LA1 Enter Line 1 Pipe Expansion Coefficient23. ENTER LT1 Enter Line 1 Pipe Measurement Temperature (DEGF)

Repeat steps 14-23 as required to comply with the number of runs identified by the configurationused in Step 1.

26. READY

The computer is ready for flow computations if further data entries for options arenot required.

SECTION 3136


4.0 CALIBRATION PROCEDURES

4.1 GENERAL

This section contains only bench calibration instructions. The Model 2234 DigitalFlow 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 oninitial startup of the Model 2234 Flow Computer. This calibration is requiredrarely although it should be checked yearly or whenever there is reason to suspectpower supply problems. It should be checked/adjusted after replacing a new orrepaired PCB in your equipment.

4.2.1 DETERMINE THE INSTRUMENT OPTIONS

Compare the dash number located on the computer with the option diagram inFigure 2-1 to determine the option for which this Model 2234 Computer has beenconfigured.

4.2.2 REQUIRED TEST EQUIPMENT

Bench calibration of the Model 2234 Computer is conducted with a minimumamount of test equipment; however efficient calibration of the instrument requiresa digital voltmeter (Fluke Model 8800A or equivalent). Miniature clips will beneeded for convenient attachment to test points, etc., to avoid shorting or otherwisedamaging the circuit boards.

SECTION 4 137


4.2.3 PROCEDURE

The Model 2234 Computer is manufactured with two versions of printed circuitboard (PCB) No.1. Each version has different designations and/or locations for thetest points and trimpot(s). Figure 4-1 shows the original version (DE-8992) andFigure 4-2 shows the more recent design (DE-10421).

_____________________________________________________________

NOTE: In the following calibration procedure, the trimpot(s) foradjustment 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 supplycase, at the rear of the instrument. Verify that the proper potential isapplied.

B. Check all supply outputs for proper voltages. Only the +24 volts and +5volts are adjustable. The power supply is a design which uses sense linesfor varying loads. Therefore, to insure optimum performance, the +24 V and+5 V supplies must be adjusted accurately to ensure optimum performance.

SECTION 4138


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


C. As a general procedure, turn off the power, pull out the board enough toattach digital voltmeter leads with the miniature clips, replace the boardcarefully and then re-apply power. Make sure nothing is shorted beforeapplying power.

D. Adjust the +24 V supply to obtain a +1.000 V reading between TP1(+) andTP3(-) on PC Board No.1 (DE-8992). On PC Board No.1 (DE-10421), obtaina +1.000 V reading between TP3(+) and TP1(-). See Figure 4-3 for powersupply voltage adjustment locations. For test point locations, refer to Figure4-1 or Figure 4-2.

E. Adjust the potentiometer on the +5 V power supply to obtain a +5.14 V to5.15 V reading between TP3(-) and Pin 24 of Eprom U5 (+) on older PCBoard No.1 (DE-8992 series). On PC Board No.1 (DE-10421 series), adjustthe +5 V power supply to obtain a +5.14 V to 5.15 V reading betweenTP1(-) (or right grounded leg of capacitor C61) and pin 24 of EpromU14A(+).

SECTION 4140


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 onPC 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. Makea note of this total. "Enable" the computer and enter the total into ReadCode 18 (full scale volume rate in LBHR).

B. Attach a digital voltmeter to terminals 46 (+) and 49 (-) on the rear of theModel 2234. Adjust span trimpot R23 (R4) on P.C. Board No.1 to a readingof +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 makingfurther adjustments. "Disable" the computer.

_____________________________________________________________

NOTE: Only one rate voltage output requires calibration. Theremaining rate voltage outputs are calibrated automatically.

_____________________________________________________________

SECTION 4 141


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 thevoltage 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 inhex, 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 spanvalue in hex, which should read FIC to represent +5.000 volts. If it is notFIC, 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 withoutfurther 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 ofthe unit; move the power supply to one side temporarily.) Connect yourprobes between terminal 37 and the wire you disconnected with the digitalvoltmeter set to the ammeter function. You will check the current betweenterminal 37 and the wire you disconnected. If no visible wire is connectedto terminal 37, measure between terminal 37 and common (terminal 57).

C. Move switch to "ENABLE" position. Enter Read Code 11 to display theMass Rate Full Scale in LBHR. Make a note of this total. "Enable" thecomputer and enter the total into Read Code 18 (full scale volume rate inLBHR).

SECTION 4142


Figure 4-3. Power Supply Voltage Adjustment Locations

SECTION 4 143


Figure 4-4. PC Board No.2, Adjustment Locations

SECTION 4144


D. Adjust gross span trimpot R47 on PC Board No.2 until the meter reads20.000 mA. See Figure 4-4.

E. Enter 0.0 into Read Code 18 (zero scale volume in LBHR). Adjust zerotrimpot 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 makingfurther adjustments.

F. "Disable" the computer and re-connect the wire on terminal 37 if necessary.

SECTION 4 145


4.3.4 DENSITY CURRENT CALIBRATION

A. Temporarily disconnect the wire at terminal 38. Connect your probesbetween terminal 38 and the wire you disconnected with the digital voltmeterset to the ammeter function. You will check the current between terminal38 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 anddensity zero output of Read Code 13.

C. Set the measured density value of Read Code 0 to FXD and enter the fullscale density value.

D. Adjust span trimpot R33 on PC Board No.2 until the meter reads20.0 mA. See Figure 4-4.

E. Enter the zero value of the density output into Read Code 0. Adjust zerotrimpot 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.

SECTION 4146


5.0 MAINTENANCE

5.1 GENERAL

This section contains information on maintenance, spare parts and procedures forreceiving factory assistance on making repairs.

5.2 PREVENTIVE MAINTENANCE

Preventive Maintenance procedures are not recommended because printed circuitboards can be adversely affected by handling. Therefore, while the Model 2230Series 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 inthe Spare Parts list in Appendix B. To insure receiving the correct option of eachspare part, order the part by its part number.

SECTION 5 147


5.4 CUSTOMER SERVICE REPORT

A Customer Service Report is located in the back of this manual. It is to be usedwhen 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 dashnumber, found on the rear of the unit, and on the back of the title page, describesthe 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 stillavailable) or in a carton or box with two or three inches of shock absorbingmaterial surrounding it. Ship prepaid via the most suitable method.

SECTION 5148


APPENDIX A: READ CODE LISTING

ReadCode

MnemonicTerm

Title Feature FXDLimits

RefPar.

0 DEN MeasuredDensity

Displays Measured Densityvalues in LBF3 (VAR orFXD)

over 0.1 3.6.2

1 TF Temperature Displays MeasuredTemperature in degreesFahrenheit (VAR or FXD)

-50 to250oF

3.6.2

2 PF StaticPressure

Displays Measured StaticPressure in PSIA (VAR orFXD)

0.0 to5000PSIA

3.6.2

3 MU FluidViscosity

Displays Fixed or VariableViscosity Number

>0.0 3.10

4 IE IsentropicExponent

Displays Isentropic ExponentNumber (FXD)

>0.0 3.10

5 TFS TemperatureTransducerFull Scale

Displays TemperatureTransducer Full Scale valuein degrees Fahrenheit (FXDonly)

- 3.6.1

6 TZ TemperatureTransducerZero Scale

Displays TemperatureTransducer Zero Scale valuein degrees Fahrenheit (FXDonly)

- 3.6.1

7 DFS DensitometerFull Scale

Displays AnalogDensitometer at Full Scale inLBF3 (FXD only)

- 3.6.1

8 DZ DensitometerZero Scale

Displays AnalogDensitometer at Zero Scale inLBF3 (FXD only)

- 3.6.1

APPENDIX A 149


READ CODE LISTING(Continued)

ReadCode

MnemonicTerm


RefPar.

9 PFS StaticPressureTransducerFull Scale

Displays Static PressureTransducer at Full Scale inPSIA (FXD only)

- 3.6.1

10 PZ StaticPressureTransducerZero Scale

Displays Static PressureTransducer at Zero Scale inPSIA (FXD only)

- 3.6.1

11 MFS Mass RateFull Scale

Displays Mass Rate at FullScale in LBHR (FXD only)

Anypositiverealnumber

3.6.3

12 DOF AnalogDensityOutput FullScale

Displays Analog DensityOutput Full Scale in LBF3(FXD only)


3.6.5

13 DZ AnalogDensityOutput ZeroScale

Displays Analog DensityOutput at Zero Scale in LBF3(FXD only)


3.6.5

14thru16

Not Used

APPENDIX A150


READ CODE LISTING (Continued)

ReadCode

MnemonicTerm


RefPar.

17 TK StationTotalizingFactor

Displays Station TotalizingFactor (FXD only)

-9 to +9 3.6.5

18 WHT Total HourlyMass Rate

Displays current Total HourlyMass Rate in LBHR (VAR orFXD)

Realnumbergreaterthan 0.0

3.6.4

19 Not Used

29thru37,42& 43

FrequencyDensitometerOption

29 TC DensitometerTemperatureCoefficient

Displays DensitometerTemperature Coefficient(FXD only)

Any realnumber

3.9.3

30 A0 DensitometerScalingConstant

Displays Scaling Constant(FXD only)

Any realnumber

3.9.3



Any realnumber

3.9.3



Any realnumber

3.9.3

33 DTC DensitometerTemperatureCoefficient

Displays DensitometerTemperature Correction ingm/cc/oF (FXD only)

Any realnumber

3.9.3

APPENDIX A 151



ReadCode

MnemonicTerm


RefPar.

34 CT DensitometerCalibrationTemperature

Displays DensitometerCalibration Temperature inDEGF (FXD only)

Any realnumberof oF

3.9.3

35 P0 *Densito-meter PressureCoefficient

Displays DensitometerPressure Coefficient (FXDonly)

Any realnumber

3.9.3

36 K *Densito-meter PressureCoefficient(FXD only)


Any realnumber

3.9.3

37 DCF DensitometerCorrectionFactor

Displays DensitometerCorrection Factor (FXDonly)


3.9.3

38-41 Not Used

42 A4 DensitometerPressureCoefficient


Any realnumber

3.9.3

43 A5 DensitometerPressureCoefficient


Any realnumber

3.9.3

(*) The Densitometer Pressure Coefficient is a combination of the constants entered at ReadCodes 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 A152



44 thru 82 Serial Output for Printing Option

ReadCode

MnemonicTerm


RefPar.

44 DLY Print Delay Print Output delays for theprinter carriage return in 100ms. increments (FXD only)

02 to 99 3.8.2

45 DTE Day of Year Displays Day of the Year(FXD only)

001 to366

3.8.3

46 TIM Hours/Minutes

Displays Time in Hours andMinutes (FXD only)

00-00 to23-59

3.8.4

47 DPT Daily PrintTime

Displays Time Daily Printoutto start (FXD only)

00 to 23 3.8.5

48 INT Print Interval Displays Time Intervalbetween printings (FXD only)

00 to 24 3.8.6

49 ID Identification Displays IdentificationNumber (FXD only)

000 TO999

3.8.7

50 BUD Baud Displays Baud Rate (FXDonly)

150 to2400

3.8.8

APPENDIX A 153


READ CODE LISTING(Continued)

ReadCode

MnemonicTerm


RefPar.

51 P01 PrintLocation 01

Displays data stored in PrintLocation 01 (FXD only)

ReadCode,BlankLine (-),NotUsed

3.8.9




3.8.9




3.8.9

thru

82 P32 PrintLocation32


ReadCode,Blankline (-),NotUsed

3.8.9

APPENDIX A154



ReadCode

MnemonicTerm


RefPar.

20n WHn Line HourlyFlow Rate

Displays Hourly Flow Ratefor a selected line (n) inLBHR (VAR or FXD)

Realnumbergreaterthan 0.0for testonly

3.6.4

21n LFn Fixed H20 Line n Cutoff DifferentialPressure

>0.0 3.6.4

22n LKn LineTotalizingFactor

Displays Totalizing Factorfor a selected line (n) (FXDonly)

-9 to +9 3.6.5

23n HFn LineDifferentialPressure FullScale

Displays Full ScaleDifferential Pressure ininches of water for aselected line (n) (FXD only)

Realnumbergreaterthan 0.0

3.6.1

24n IDn Line InsideDiameter

Displays Inside Diameterfor a selected line (n) ininches (FXD only)

Typically1.0 to50.0inches

3.6.3

25n ODn Line OrificeDiameter

Displays Orifice Diameterfor a selected line (n) ininches (FXD only)

Typically0.2 to40.0inches

3.6.3

26n HWn LineDifferentialPressure

Displays DifferentialPressure for a selected line(n) in inches of water (VARor FXD)

0 to 1000inches ofwater fortest only

3.6.2

APPENDIX A 155



ReadCode

MnemonicTerm


RefPar.

27n EXn LineExtensionFactor

Displays Extension Factor fora selected line (n) as HWnx PF (VAR or FXD)

3.6.4

28 CDn Line nDischargeCoefficient

Displays DischargeCoefficient for a selected line(n) (VAR or FXD)

Typically>0.0

29n Yn LineExpansionFactor

Displays Expansion Factorfor a selected line (n) (VARor FXD)

Typically0.87 to1.04typical>0.0

3.6.4

30n TLn Line TapLocation

Displays Tap Location for aselected line (n) (FXD only)

1 =upstream2=downstream

3.6.3

31n FMn Line nMass FlowFactor

Line n Mass Flow Factor(VAR or FXD)

Typically>0.0

3.10

32n PAn Live n PlateAlpha

Displays Line n Plate Alpha None 3.10

33n PTn PlateMeasuredTemperature

Displays Line n PlateMeasure Temperature

Typically>0.0

3.10

34n LAn Line n PipeAlpha

Displays Line n Pipe Alpha none 3.10

APPENDIX A156



ReadCode

MnemonicTerm


RefPar.

35n LTn Line n PipeMeasureTempera-ture

Displays Line n Pipe MeasureTemperature (FXD)

Typically>0.0

3.10

36n Bn Line n Beta Displays Line n Beta Factor >0.0 3.10

37n Pn Line nUpstreamPressure

Displays Line n UpstreamPressure

>0.0 3.10

800 RATE LT StationTotal MassRate

Displays Station Total MassRate (VAR only)

3.6.4

80n RATE Ln Mass FlowRate

Displays Mass Flow Ratethrough the station or selectedline (n) (VAR only)

- 3.6.4

81nthru89nnotused

900 TOTAL LT StationTotal Mass

Displays Station Total Mass(VAR only)

3.6.4

90n TOTAL Ln Mass Totals Displays Mass Totals throughthe station or a selected line(n) (VAR only)

- 3.6.4

APPENDIX A 157



APPENDIX A158


DRAWINGS AND PARTS LIST

Spare Parts List SP-8969-4

Field Wiring Diagram DE-9144

Lightning Protection DE-8940

Dimensions CE-9117

APPENDIX B 159



APPENDIX B160

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 ofthe product in question.

2. Return the product to Daniel within twelve (12) months of the date of original shipmentof the product, or within eighteen (18) months of the date of original shipment of theproduct to destinations outside of the United States. The Purchaser must prepay anyshipping charges. In addition, the Purchaser is responsible for insuring any productshipped 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 centercall (713) 467-6000, Fax (281) 897-2901, or contact:

Daniel Industries, Inc.ElectronicsP. O. Box 55435Houston, Texas 77255

When contacting Daniel for product service, the purchaser is asked to provideinformation as indicated on the following "Customer Problem Report".

Daniel Industries, Inc. offers both on call and contract maintenance service designed toafford single source responsibility for all its products.

Daniel Industries, Inc. reserves the right to make changes at any time to any product toimprove 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 AFFECTEDEQUIPMENT 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 SERVICEDEPARTMENT AT:

DANIEL INDUSTRIES, INC. PHONE: (281) 897-2900ATTN: CUSTOMER SERVICE FAX: (281) 897-290119203 HEMPSTEAD HIGHWAYHOUSTON, TEXAS 77065

The sales and service offices of Daniel Industries, Inc. are locatedthroughout the United States and in major countries overseas.

Please contact the Daniel Industries, Inc., Electronics Division atP. 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-sourceresponsibility for all Electronics Products.

Daniel Industries, Inc. reserves the right to make changes to any of its products or servicesat any time without prior notification in order to improve that product or service and to supply

the best product or service possible.

Documents

MODEL 2234 DIGITAL FLOW COMPUTER - Emerson Electric