Q.Sonic User's Manual Rev F2
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Description
Ultrasonic Metering Division 12650 Directors Drive – Suite 100, Stafford, Texas 77477 Tel: (281) 491-5252 Fax: (281) 491-8440 Web Site: www.instrometinc.com
®
Instromet Q Q.Sonic User’s M Manual
Document Code: 10.00.01/E/F Date: 2003-02-12
INSTROMET Q.SONIC® USER’S MANUAL
Document
Instromet Q.Sonic® User’s Manual
Document Code
10.00.01/E/F
Date
February 12, 2003
Publisher
Instromet, Inc. 12650 Directors Drive, Suite 100 Houston, Texas 77477 Phone: Pho ne: (281) (281) 491-5 491-5252 252 or or (800) (800) 795-7 795-7512 512 Fax: (281) 491-8440 Web Site: www.instrometinc.com Other Office: Instromet Ultrasonics B.V.
Copyright
Pieter Zeemanweg 61 3316 GZ Do Dordrecht
PO Box 8090 3301 CB Do Dordrecht
The Netherlands
The Netherlands
Phone hone:: 31-78 1-78--651 651 0977 0977 Fax: 31-78-651 1017 © 2001, Instromet, Inc., Houston, Texas. © 2001, Instromet Ultrasonics B.V., Dordrecht, The Netherlands. Instromet Ultrasonics B.V. is a member of the Instromet group. All technical and technological information contained in this manual, including any drawings and technical specifications shall remain the property of Instromet, Inc. or Instromet Ultrasonics B.V. and may not be used (other than for the operation of this product), copied, multiplied, passed on or communicated to a third party without the prior written permission of Instromet, Inc.
Trademarks
Products listed are trademarks trademarks of their their respective manufacturers. Company names listed are trade names of their respective companies.
Revision History
Revision 10.00.01/E/A 10.00.01/E/B 10.00.01/E/C 10.00.01/E/D 10.00.01/E/E 10.00.01/E/F
Description Original Issue Minor Revisions Minor Revisions Revised for Series III TIP Minor Revisions Minor Revisions
Date November 9, 1998 April 6, 1999 May 9, 2000 October 10, 2001 November 5, 2001 February 12, 2003
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TABLE OF CONTENTS
Table of Contents 1
PREFA PREFACE CE ................. .......................... .................. ................. ................. .................. .................. .................. .................. .................. ................. ................. .................... .................... .................. ................. ........ 4 1.1 1.2 1.3 1.4 1.5 1.6 1.7
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I NTRODUCTION ............. ........................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ................ .. 4 WARRANTY ............. ........................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ..................... ....... 4 Q.SONIC DOCUMENTATION ............. ........................... ............................ ........................... ........................... ............................ ............................ ............................ ............................ .......................... ............ 5 ABBREVIATIONS AND ACRONYMS .............. ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ .............. 5 VARIABLE DEFINITIONS.............. ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ................ .. 6 REFERENCES .......................... ............ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ..................... ....... 6 ASSISTANCE............. ........................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ..................... ....... 6 ®
THE Q.SONIC ULTRASONIC FLOW METER...................... METER... ...................................... ...................................... ...................................... .......................... ....... 7 2.1 I NTRODUCTION ............. ........................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ................ .. 7 2.2 GENERAL CHARACTERISTICS............. ........................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ....................... ......... 7 2.2.1 Standa Standard rd 3 and 5 path design design (8 Chord and 12 Chord) Chord) ................. .................................. .................................. ................................. ........................... ................ ..... 7 2.2.2 2 path Design Design (6 Chord)......................... Chord)....................................... ............................. .............................. .............................. ............................. .......................... .......................... ..................... ....... 8 2.2.3 TwinS TwinSonic onic ............................ .......................................... ............................. ............................. ............................. ............................. ........................... ........................... ............................ .......................... ............ 8 2.3 Q.SONIC® METER BENEFITS .............. ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ....................... ......... 9 ® 2.4 Q.SONIC APPLICATIONS .............. ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ .............. 9 2.5 CALIBRATION ............. ........................... ............................ ........................... ........................... ............................ ............................ ............................ ............................ ............................ ............................ ................... ..... 9 2.6 I NPUT AND OUTPUT SIGNALS ............. ........................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ..................... ....... 10 2.7 APPROVALS AND CERTIFICATION ............. ........................... ............................ ............................ ............................ ............................ ............................ ............................ ........................... ............... 10
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THEO THEORY RY OF OPERA OPERATION TION .................. ........................... .................. .................. .................. .................. .................. ................... ................... .................. ................. ................. ........... .. 11 3.1 3.2 3.3
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I NTRODUCTION ............. ........................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ .............. 11 FLOW VELOCITY MEASUREMENT ............. ........................... ............................ ............................ ............................ ............................ ............................ ............................ ........................... ............... 12 VOLUME FLOW CALCULATION ............ .......................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ................... ..... 13
SYSTEM DESCRIPTI DESCRIPTION ON ................. .......................... .................. .................. ................. ................. .................. .................. .................. ................. ................. ................... .................. ........ 15 4.1 I NTRODUCTION ............. ........................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ .............. 15 4.2 PATH CONFIGURATION ............. ........................... ............................ ........................... ........................... ............................ ............................ ............................ ............................ ............................. ................. .. 16 4.3 SPOOLPIECE AND TRANSDUCER MOUNTS ............. ........................... ............................ ............................ ............................. ............................. ............................ ............................ ................ 17 4.4 TRANSDUCERS ............. ........................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ .............. 17 4.5 SIGNAL PROCESSING U NIT ............ .......................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ .......................... ............ 18 4.5.1 Explos Explosion ion proof enclo enclosure.................... sure.................................. ............................. .............................. ............................. ............................. ........................... .......................... ..................... ....... 19 4.5.2 Module Moduless ............... ............................. ............................. ............................. ............................. ............................. ............................ ............................ ............................ ............................ ......................... ........... 19 4.5.3 Frequ Frequency ency Contr Control ol Card .............. ............................ ............................ ............................ ............................ ............................ ............................ .............................. .............................. .............. 21 4.5.4 Termi Terminal nal Strip....... Strip..................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................. .......................... ........... 22 4.6 BASIC I NPUT AND OUTPUT FEATURES ............. ........................... ............................. ............................. ............................ ............................ ............................ ............................ .................... ...... 22 4.6.1 Freque Frequency ncy Outputs .............. ............................. ............................. ............................ ............................ ............................ ............................. ............................. ............................ ....................... ......... 22 4.6.2 Analog Inputs .............. ............................ ............................ ............................ ............................. ............................. ............................ .............................. .............................. ............................ ................ .. 23 4.6.3 Analog Outputs.......... Outputs........................ ............................ ............................ ............................. ............................. ............................ ............................. ............................. ............................. ................... .... 23 4.6.4 Serial Data Commun Communication......................... ication....................................... ............................ ............................ ............................. ............................. ........................... ........................... .............. 23 4.6.5 Data Valid Signa Signall ............... ............................. ............................. .............................. .............................. ............................. ............................. ............................ ........................... ....................... ......... 24 4.6.6 Partia Partiall Failure Failure Signal................ Signal............................... ............................. ............................. .............................. ............................. ............................ ............................ ............................ ................ .. 24 4.6.7 Flow Direct Direction ion Signals........................ Signals...................................... ............................. .............................. ............................. ............................. ............................ ............................ ..................... ...... 25 4.7 POWER R EQUIREMENT EQUIREMENT.............. ............................ ............................ ........................... ........................... ............................ ............................ ............................ ............................ ............................. ................. .. 25 4.8 COMMUNICATION – UNIFORM SOFTWARE............. ............................ ............................. ............................ ............................ ............................ ............................. ......................... .......... 25 4.8.1 Requir Requirements ements for running running UNIFORM.................................... UNIFORM................................................... .............................. ............................. ............................ ............................ .............. 26 4.9 PARAMETER SET-UP............. ........................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ..................... ....... 27 4.9.1 4.9.2
PROSON PROSON-II -II Configu Configuration ration ............................ .......................................... ............................ ............................ ............................. ............................. ............................ .......................... ............ 27 Module Informa Information.............. tion............................ ............................ ............................ ............................ ............................ ............................. ............................... .............................. ..................... ....... 27
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TABLE OF CONTENTS 4.9.3 4.9.4 4.9.5 4.9.6 4.9.7 4.9.8 4.9.9 4.9.10
Spool Piece Parameters............ Parameters....................... ..................... .................... ..................... ..................... ..................... ..................... .................... ..................... ...................... ..................... ............. ... 28 V-Module Parameters ..................... ........... ..................... ..................... .................... ..................... ..................... ..................... ..................... ................... .................... ..................... .................. ........ 28 Velocity Profile Correction ..................... .......... ...................... ...................... ...................... ...................... ...................... ..................... ..................... ..................... ..................... ................. ...... 29 Calibra Calibration tion Parame Parameters................ ters.............................. ............................ ............................ ............................ ............................ ........................... ............................ ............................. ................ .. 30 Adjus Adjustt Factor............................... Factor............................................. ............................. ............................. ............................. ............................. ........................... ........................... ............................. ................. 30 Low Pass Filter Set-up .................... .......... ..................... ...................... ...................... ...................... ...................... ..................... ..................... ..................... .................... .................... ............... ..... 31 Low Flow Cut-off Set-up ............................. ........................................... ............................. ............................. ............................ ........................... .......................... ........................... ................ .. 31 P&T Input Set-up.................. Set-up................................. ............................. ............................. ............................. ............................. ............................. ............................ ............................. ..................... ...... 31
4.9.11 PTZ Volume Correction........... Correction...................... ...................... ..................... ..................... ...................... ..................... ..................... ...................... .................... .................... ..................... ............. ... 33 32 4.9.12 Current/Frequency Output Set-up ........... ..................... ..................... ..................... ..................... ..................... ..................... ..................... .................... .................... .................... .......... 4.10 EQUIPMENT AND SOFTWARE OPTIONS ............. ........................... ............................ ............................ ............................. ............................. ............................ ............................ ................ 34
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INSTA INSTALLATIO LLATION/STA N/START-UP RT-UP ................ ......................... .................. ................. ................. .................. ................. ................. .................. ................. ................. ................... ............. ... 36 5.1 5.2 5.3 5.4 5.5
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OPER OPERATION ATION AND MAINTENANC MAINTENANCE................ E........................ ................ ................. ................. ................. ................. ................. ................. ................. ................. ........... ... 40 6.1 6.2
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I NTRODUCTION ............. ........................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ .............. 36 SHIPMENT I NSPECTION.............. ............................ ............................ ........................... ........................... ............................ ............................ ............................ ............................ ............................. ................. .. 36 Q.SONIC® METER I NSTALLATION .............. ............................ ............................ ............................ ............................ ............................ ............................ ............................ .......................... ............ 36 I NSTALLING THE PARAMETER SET-UP............. ........................... ............................. ............................. ............................ ............................ ............................ ............................ .................... ...... 36 PARAMETER SET-UP PROTECTION .............. ............................ ............................ ............................ ............................ ............................ ............................ ............................ .......................... ............ 38
I NTRODUCTION ............. ........................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ .............. 40 ROUTINE CHECKS .............. ............................ ............................ ........................... ........................... ............................ ............................ ............................ ............................ ............................. ........................ ......... 40
TROU TROUBLESHO BLESHOOTING........... OTING................... ................. .................. .................. ................. ................. .................. .................. ................. ................. .................. .................... .................... ......... 43 7.1 7.2 7.3
I NTRODUCTION ............. ........................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ .............. 43 QUICK CHECKS ............. ........................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ .............. 43 TROUBLESHOOTING ............. ........................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ..................... ....... 43
APPENDIX A FREQUENCY CONTROL CARD ............................................. ...................... ............................................. ........................................... ..................... 44 APPENDIX A-1 FCC INPUT/OUTPUT SIGNALS ......................................... .................... ........................................... ........................................... ....................... .. 45 APPENDIX B SERIES III, 2 BOARD ELECTRICAL.................... ELECTRICAL .......................................... ........................................... ....................................... .................. 48 APPENDIX B-1 SERIES III, 2 BOARD WIRING........................ WIRING.. ........................................... .......................................... ......................................... ...................... .. 49 APPENDIX B-2 SERIES III, 3 BOARD ELECTRICAL............................................ ELECTRICAL..................... .............................................. .................................. ........... 50 APPENDIX B-3 SERIES III, 3 BOARD WIRING......................... WIRING..... ......................................... .......................................... ........................................ ..................... .. 51 APPENDIX B-4 NOTES ON ELECTRICAL ....................................... .................. ........................................... ........................................... ................................... .............. 52 APPENDIX C CONVERTER CABLE PIN OUTS ........................................... ..................... ............................................. ............................................ ..................... 53 APPENDIX D PARAMETER SET-UP ........................................ ................... ......................................... ......................................... ....................................... ......................... ....... 54 APPENDIX E MODBUS REGISTER LISTING................................. LISTING............ ........................................... ........................................... .................................... ............... 56 APPENDIX F EXAMPLE INSPECTION FORM................................. FORM............ .......................................... ......................................... ................................... ............... 57 APPENDIX G BASIC PARAMETER CRITERIA ....................................... .................. .......................................... ......................................... ........................... ....... 58 GLOSSARY.............................. GLOSSARY............ .................................... .................................... .................................... ..................................... .................................... .................................. ................................. ................ 59
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PREFACE
1
Preface
1. 1.11 Intr Introd oduc ucti tion on
This manual provides information about the theory of operation, system description, installation/start-up, and maintenance of the Instromet Q.Sonic® gas flow meter. Although this manual manual focuses on the Series Series III electronics, electronics, many aspects of the older Series II electronics is also covered due to the extensive commonality of the two. As noted within this manual, the Series II electronics can be upgraded to Series III electronics. To ensure proper installation, and subsequent accurate and trouble free operation, this manual and the following associated manuals (supplied with the meter) should be thoroughly reviewed prior to beginning the installation ® and use of the Q.Sonic meter.
♦ Instromet Q.Sonic® & S.Sonic Installation Manual Ultrasonic Flow Meter Troubleshooting Troubleshooting Manual ♦ Instromet Ultrasonic ♦ UNIFORM User’s Guide Where the term Instromet is used in this document it refers to Instromet, Inc., Instromet Ultrasonics B.V., or authorized representatives of these companies . This manual is based on the latest information at the time of printing and is provided provi ded subject subject to revisions. revisions. Instromet Instromet reserves reserves the right to change change the construction and/or configuration of its products at any time without being obligated to update earlier supplies.
NOTE: The name Q.Sonic is registered to Instromet Ultrasonics B.V. However, for ease of reading, the ‘registered’ symbol will not be shown in the balance of of the document. document.
1. 1.22 Warr Warran anty ty
Instromet provides a warranty warranty on all parts and labor for a period of 24 months from date of purchase, however, shall have no obligation in the event that:
♦
Repair or replacement of equipment or parts has been required through normal wear and tear or necessitated in whole or part by catastrophe or the fault or negligence of the purchaser;
♦
The equipment or parts have been maintained or repaired in a manner other than that recommended by the manufacturer, or have been modified in any manner without prior express written permission of the manufacturer;
♦ Non-original parts are used; ♦ Equipment is used improperly,
incorrectly, carelessly or not in line with
its nature and/or purpose;
♦
Product is used with incompatible equipment or peripherals, including but not necessarily limited to cables, testing equipment, computers, voltage, etc.
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PREFACE Manufacturer is not responsible for the incidental or consequential damages resulting from the breach of any express or implied warranties, including damage to property, and to the extent permitted by law, damage for personal injury.
1.3 Q.Soni Q.Sonicc Docume Documenta ntatio tion n
The Q.Sonic documentation consists of several documents which are listed below: ®
♦ Instromet Q.Sonic User’s Manual (this document) ♦ Instromet Q.Sonic® & S.Sonic Installation Manual ♦ ♦
Instromet Ultrasonic Flow Meter Troubleshooting Manual UNIFORM User’s Guide
In addition, the following documents are available on request:
♦ ♦ ♦ ♦ ♦ 1.4 Abbrev Abbreviat iation ionss and and Acronyms
RTU Modbus Manual Material Certificates Mechanical Certificates of conformity (i.e. X-ray, hydrostatic tests) Factory Mutual (FM) Certifica Certificate te Instromet electronics digital communication protocol
ASCII AGC ANSI AWG DC FMRC (FM) NEMA NMi NPT PC PCB PTB PTZ RTD
American Standard Code for IInformation Interchange Automatic Gain Control American National Standards Institute American Wire Gauge Direct Current Factory Mutual Research Corporation National Electrical Manufacturers Association Nederlands Meetinstituut National Pipe Thread Personal Computer Printed Circuit Board Physikalisch-Technische Bundesanstalt Pressure, Temperature, Z(Compressibility) Resistance Temperature Detector
RTU SPU UL UNIFORM VOS
R emoteProcessing Terminal UUnit Signal nit Underwriters Laboratories UltrasoNIc Flow meter cOnfiguRation and Monitoring software Velocity of Sound (Speed of sound)
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PREFACE
1.5 Variab Variable le Definit Definition ionss
A c D f adjust adjust k c k z
Cross sectional area of pipe or meter Speed of sound Internal diameter of pipe or meter Adjust factor (usually based on flow calibration results) Correction factor ( related to Reynolds number Re) A constant compressibility factor
L P P 0 Q Line Q Base S T T D T 0 T UU V V L V m v(r )
Acoustic length between a transducer pair Absolute path pressure at line (flowing) conditions Absolute pressure at base (reference) conditions Volume at line conditions (actual volume) Volume corrected to base (reference) conditions Cross section of pipe Absolute temperature at line (flowing) conditions Time for sound to travel from upstream to downstream transducer Absolute temperature at base (reference) conditions Time for sound to travel from downstream to upstream transducer Velocity of gas stream Average velocity along an acoustic path Bulk mean velocity (average velocity of gas stream) Velo Veloccity at a point int alo long ng th thee pip ipees rad radiu iuss
z 0 z
Compressibility at base (reference) conditions Compressibility Compressibil ity at line (flowing) conditions Angle (phi) between pipe axis and acoustic path
ϕ 1. 1.66 Refer Referen ences ces
1. 2. 3. 4. 5.
1. 1.77 Assi Assist stan ance ce
Instromet, Digital Communication: UNIFORM Protocol (Measured Data) Instromet Ultrasonics B.V. Instromet, Digital Communication: Modbus Protocol Instromet Ultrasonics B.V. Instromet, UNIFORM User’s Guide, Instromet, Inc. Instromet Q.Sonic® & S.Sonic Installation Manual, Instromet, Inc. Instromet Ultrasonic Flow Meter Troubleshooting Manual , Instromet, Inc.
Although every effort has been made to address all areas of meter operation, issues may arise which are unique to a specific application. Any questions should be directed to Instromet, Inc., at (281) 491-5252 or (800) 795-7512. In addition to the telephone assistance, information with respect to product specifications, software, manuals and approvals can be obtained by going to the Instromet web site, www.instrometinc.com, and following the links. Alternately, those links can be accessed directly via the following URLs: Software: Manuals: Approvals:
http://www.instrometinc.com/software.htm http://www.instrometinc.com/manuals.htm http://www.instrometinc.com/Approvals/approvals.htm
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®
THE Q.SONIC® ULTRASONIC FLOW METER
®
2
The Q.Sonic Ultrasonic Flow Meter
2. 2.11 Intr Introd oduc ucti tion on
The Q.Sonic is a multipath ultrasonic meter designed by Instromet, Inc. and Instromet Ultrasonics B.V. specifically for custody transfer measurement applications where maximum maximum accuracy is required. The multipath design also has the inherent characteristic of enhanced reliability due to the redundancy in the acoustic measurement paths. The Q.Sonic multipath ultrasonic meter meets or exceeds all the requirements set out in AGA 9. To date the Q.Sonic has been legally approved for fiscal metering (custody transfer measurement) in several countries including:
• • • • •
The Netherlands Germany Czech Republic Indonesia Canada
• • • •
Malaysia Austria China Russia
This manual provides the theory upon which ultrasonic measurement is based, a detailed system description, and general information on the Installation/Start-up, Operation and Troubleshooting of the Q.Sonic meter. More detailed information on the Installation/Start-up and Troubleshooting ® are contained in Instromet Q.Sonic & S.Sonic Installation Manual and Instromet Ultrasonic Ultrasonic Flow Meter Troubleshooting Troubleshooting Manual .
2. 2.22 Gen Gener eral al Chara haract cter eris isttic icss
2. 2.2. 2.11
Sta tand ndar ard d 3 and and 5 pat path h des desiign (8 Cho Chord and and 1122 C Cho hord rd))
The Instromet Q.Sonic meter is a highly sophisticated multipath ultrasonic meter integrated integrated into a spoolpiece. It is available available in two designs; designs; a 3-path configuration, and a 5-path configuration. Two of the paths paths in each of the designs are swirl paths. paths. . The geometry is such that there there are a total of 8 chords along which the gas velocity is measured on the 3-path meter, and 12 chords on the 5-path meter. The unique combination combination of single reflective aand nd double reflective ultrasonic paths provides excellent flow profile prof ile representation, which, when integrated, integrated, results in very high high accuracy velocity measurement. measurement. This accuracy is maintained even when the flowing conditions are less than ideal. The Q.Sonic also has the capability of bi-directional measurement with equal accuracy in both directions. The transducers are positioned so that there is only a minimal protrusion into the gas stream. stream. This minor protrusion creates creates only negligible pressure loss, however, it ensures that the time measurement is truly representative of the flowing stream only, and not affected by stagnated gas in the transducer port.
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®
THE Q.SONIC® ULTRASONIC FLOW METER As part of the manufacturing process, after the meter has been fabricated and fully assembled, assembled, it is dry calibrated. The dry calibration calibration procedure, which which is performed perfor med under very controlled controlled conditions conditions,, provides provides an elec electroni tronicc means means of verifying or fine-tuning the meter geometry (i.e. path length) originally determined with mechanical mechanical measurement tools. The result of this dry calibration procedure is the ability for Instromet to manufacture the meter with a reproducibility of better than ±0.3% and a measurement error of less than 0.5%, (without installation of a flow conditioner) prior to any flow calibration at a test facility. facility . After calibration at a test facility, the meter meter error is usually in the range of ± 0.2% or better excluding the uncertainty of the test facility. Depending on the type of transducer chosen, the meter is designed to operate in the 0 to 290 psig (0 to 2 000 kPa) or 116 to 2,175 psig (800 to 15 000 kPa) pressure pressu re ranges ranges.. Although the meter body length has been standardized, the fabrication of the body allows for custo custom m lengths lengths to permit permit direct direct replacem replacement ent of some some turbine turbine meters. The meter is currently currently available in sizes sizes from 4 to 36 inches, or larger upon special request.
2.2.2 2.2.2
2 path Design (6 Chord)
The 2-path meter design, is actually a 3-path meter without the axial path installed, and and therefore only has has 2 swirl paths. The intent of this design design is to reduce the meter complexity but still offer a meter capable of providing a fairly high degree of accuracy. The as-built measurement error of this meter is within the range of ±1.0%. This error can be reduced significantly by calibrating the meter. This design is most suitable for providing a relatively high accuracy check meter where piping configuration may result in there being significant swirl in the flow profile. To date, the 2-path (6 chord) meter has not been accepted for use as a custody transfer meter meter in any country. One of the primary drawbacks to this mete meterr is that the loss of one of the paths will disqualify the data from the second path, resulting in total loss of measurement.
2.2.3 2.2.3
TwinSonic
The TwinSonic is a unique design which basically creates two independent meters out of one. It consists of a standard standard 3-path meter (8 chords) with the addition of a second SPU containing the electronics for a CheckSonic meter (single path meter). meter). The output from the axial axial path transducers transducers is fed to both sets of electronics via a switchbox to prevent signal conflicts. The independent CheckSonic electronics provide a completely redundant measurement system, which will provide measurement data if the 3-path electronicss were to fail for some reason other than a power failure. electronic
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®
THE Q.SONIC® ULTRASONIC FLOW METER 2. 2.33 Q.So Q.Soni nicc ® Meter Benefits
The Q.Sonic features numerous unique benefits when compared to other common measuring techniques (e.g. orifice plates, turbine meters, vortex meters, and venturi meters). The most significant of these are:
♦ ♦ ♦
Large dynamic range greater than 50:1 (dependent upon pipeline size) Highly insensitive to asymmetrical, pulsating and swirling flow Accuracy of better than 0.2 % when calibrated (relative to test facility uncertainty)
♦ Negligible gas flow resistance, thus negligible negligible pressure pressure drop ♦ Capable of bi-directional flow measurement with equal accuracy ♦ Highly insensitive to wet and/or untreated production gas ♦ Virtually no maintenance required ♦ Virtually insensitive to pulsating gas flow ♦ Sour gas capable (up to 10% sour gas components) ♦ Interfaces with major flow computer manufacturers ♦ Transducer exchange without need for recalibration 2. 2.44 Q. Q.S Son oniic ® Applications
The T he design of the Q.Sonic meter lends itself to two primary applications (although there are several applications like lost and unaccounted unaccounted for, pipeline operation, fuel gas measurement, etc. where “custody” quality measurement is desired):
♦ ♦ ♦
Custody transfer metering Underground gas storage sites (bi-directional) Off shore measurement
As a result of the inherent characteristics and high degree of accuracy of the multipath meter, significant savings can be realized from reductions in a) the capital cost of the measurement installation, and b) compression costs associated with metering metering pressure losses. These savings would not only be realized on new facilities but also on retrofits and upgrades of existing measurement facilities. In addition, the Q.Sonic is well suited for offshore and/or wet gas applications, where severe measuring conditions may adversely affect the quality of data from more conventional forms of measurement such as orifice and turbine meters.
2. 2.55 Cali Calibr brat atio ion n
To T o evaluate and minimize measurement error, it is recommended that the meter be flow calibrated at a certified calibration facility particularly if a flow conditioner is being being installed upstream upstream of the meter. meter. In some countries it is legally mandated that meters utilized for custody transfer measurement applications be flow proved and certified at an accredited flow calibration facility.
Each of the following f ollowing facilities facilities has the capability of testing meters and issuing a calibration certificate. It should be noted that in countries where meter calibrations are legally mandated, only certain of the aforementioned may be
Page Ultrasonic Metering Division
9
®
THE Q.SONIC® ULTRASONIC FLOW METER recognized. It is the responsibility responsibility of the user to ensure that the meter meter is tested tested at an app approp ropria riate te facili facility ty.. Bernoulli Lab Laboratorium;
Westerbork, Net Netherlands Accedited by: NMi
Pigsar GH45
Dorsten, Germany Accredited by: PTB
Southw S outhwes estt Resea Research rch Insti Institut tutee
Sa San n Anton Antonio, io, Texas, Texas, USA Traceable to NIST Standards
CEESI
Ventura, Iowa, USA Traceable to NIST Standards Certified by: Measurement Canada
T Tran ransC sCan anad adaa Cal Calib ibra rati tion onss
Wi Winn nnip ipeg eg,, Ma Mani nito toba ba,, Can Canad adaa Certified by: Measurement Canada Traceable to NMi Standards
The calibration certificate which the facility issues will state the relative error (as measured), the ‘adjust factor’, and the ‘as tested’ Parameter Set-up in the Q.Sonic meter. This certificate is stamped and signed by a facility representative or a representative authorized by the accrediting/certifying body.
2.6 Input and Output Output S Signal ignalss
he Q.Sonic can provide output signals based upon volume (actual or corT The
rected), average pipeline gas velocity, or gas VOS. The electronics provide a frequency output with a maximum full scale of 10,000 Hz which can be configured configure d to meet any full-scale requirement up to that value. If an analog output (4 – 20 mA), or a signal representative representative of the corrected gas volume are required, the optional C-Module must be installed.
The measurement units for volume (actual or corrected), average gas velocity, or gas VOS can be in either US or SI.
NOTE: For the computation of corrected gas volumes, the customer must supply the temperature and pressure signals to the meter, and the electronics require the optional C-Module.
2. 2.77 Appr Approv oval alss and Certification
The T he Instromet Q.Sonic ultrasonic flow meter system is designed and approved for hazardous area operation. The electronics and transducers are certified by Factory Mutual Research Corporation (FMRC, also know as FM) for operation in Class 1, Division 1, Group B, C and D hazardous areas.
Check with Instromet on the latest FMRC approvals.
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THEORY OF OPERATION
3
Theory of Operation
3. 3.11 Intr Introd oduc ucti tion on
An ultrasonic flow meter is a measurement device, which utilizes acoustics to determine the velocity velocity of a fluid passing through through a conduit. In a gas measurement application theare prime element one The or more of ultrasonic transducers which which located alongconsists the pipeof wall. facespairs of each pair of tra transduc nsducers ers have have a de defined fined geometric geometric relationsh relationship ip to each othe other. r. Ultrasonic acoustic pulses transmitted by one transducer are received by the other one, and vice versa. The Instromet Q.Sonic meter utilizes a combination of single reflection reflection and double double reflection paths. The single reflection reflection paths bouncee the acoustic bounc acoustic signal signal from the the opposite opposite wall before before the second second transduce transducer r receives it. This increases the total path path length, thus improving resolution and extending the meter’s rangeability. A double reflection path path bounces the acoustic signal off the pipe wall twice (a triangular shaped path) before the second transducer in the pair receives receives it. Figure 4-2 shows the geometry geometry of the reflective paths. For purposesisofutilized. discussion in principal this section, a point-to-point (without still bouncing the signals) The of opera operation tion and equations apply regardless of whether or not the signal is reflected off the pipe wall.
D
L
ϕ
νν
Figure 3 – 1: Single point to point accoustic signal
Page 11 Ultrasonic Metering Division
THEORY OF OPERATION 3. 3.22 Flow Flow Velo Veloci city ty Measurement
The acoustic pulses cross the pipe from transducer to transducer, like a ferryman crossing a river. Without flow, they propagate with the sam samee speed c (speed of sound) in both directions. directions. If the gas in the pipe has a flow velocity ν , different from zero, pulses travelling downstream with the flow will move faster, while those travelling upstream against the flow will move slower. Thus the downstream travel times t D will be shorter, while the upstream ones t U will be longer as compared when the gas is not moving:
t D =
L c + v ⋅ cos ϕ
(3.1)
and
tU =
L
(3.2)
c − v ⋅ cos ϕ
where L denotes where L denotes the straight line length of the acoustic path between the two transducers, given by:
L =
D
(3.3)
sin ϕ
The travel times times are measured measured electronically. electronically. From the difference, the flow $
velocity v is calculated by:
v = $
L 2 cos ϕ
1 1 - t D t U
(3.4)
Generally speaking, the flow velocity is not constant over the pipe’s cross section. In steady swirl-free swirl-free flow through long straight cylindrical tubes, the flow velocity is a function of the radial position only. only. This function, usually called the fully developed velocity profile, can be approximated by a semiempirical power law: 1
r R
v( r ) = v max 1 -
n
(3.5)
where r is is the radial position, R position, R is is the radius of the pipe, and n is a function of the Reynolds number Re number Re,, and pipe roughness. For smooth pipes n is calculated as follows:
( ) − 0.8
Re n = 2 log 10 n
(3.6)
The flow velocity as calculated by (3.4) ( 3.4) is the line-integral along the path:
v L =
1
L
∫ v(r )dL L
(3.7)
In other words, the velocity perceived by the instrument equals the average, along the acoustic path, of the fluid velocity component in the direction of the path. Normally Normally a user user is intereste interested d in the bulk mean mean velocit velocity y vm of the medium, which means the velocity averaged over the cross section S of of the pipe.
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THEORY OF OPERATION
vm =
1 S
∫∫ v(r )dS
(3.8)
S
If v only has a component perpendicular to S , the bulk mean velocity vm is computed from:
vm = k c ⋅ v L
(3.9a)
where k c denotes the so-called correction factor defined by:
1
∫∫ v(r )dS v( r )dL L ∫
S kc = 1
S
(3.10)
L
The correction factor k c can be computed once v(r) v(r),, L L and S are known. Because v(r) v(r) is is a function of Re of Re,, the correction factor is also a function of Re of Re.. An ‘Adjust Factor’, f Factor’, f adjust adjust , allows adjustment of the meter after flow calibration. The adjust factor is applied applied to the bulk mean velocity. velocity. Series III type meters provide provi de the capabilit capability y of configu configuring ring the the meter meter for 2 adjust adjust factors, factors, one one for each each flow direction if the meter is calibrated for bi-directional flow.
vm = f adjust ⋅ k c ⋅ v L 3.3 Volume Volume Flow Calculatio Calculation n
(3.9b)
The volume flow at line conditions Q Line is the (adjusted) profile-corrected gas velocity vm multiplied by the internal cross sectional area A of the spool piece: A of
Q Line = v m ⋅ A = v m ⋅
π D
2
4
(3.11)
The volumetric flow at base conditions Q Base calculated as follows:
Q Base
=
z 0 P T 0
⋅
⋅
z P 0 T
⋅ Q Line
(3.12)
where:
♦ z , P , T are
compressibility factor, pressure and temperature at base (or reference) conditions, and ♦ z, P, T are compressibility factor, pressure and temperature at line (or metering) conditions. 0
0
0
The addition of the optional C-Module with it latest version of firmware gives the Q.Sonic the capability of calculating the corrected gas volume at base conditions, provided there are pressure and temperature inputs and the composition of the gas is known. This new firmware has also expanded the methodologies that may be utilized to correct for the supercompressiblity of the gas. While the older firmware (in Series II electronics) only provided an approximation methodology based on a single polynomial equation and 6 “approximation coefficients” the new firmware also allows for the selection of AGA NX-19, SGERG or Disabled (Off).
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THEORY OF OPERATION Approximation Methodology: compressibility factor is calculated using a polynomi poly nomial al equation. equation. Any compress compressibil ibility ity calcula calculation tion can be approxima approximated ted by virtue of the 6 “approximation coefficients’’ in the equation. Instromet can determine these coefficients based on the following information.
♦ ♦
Max and minimum flowing gas temperature
♦ ♦
Average Specific Gravity (Relative Density) Average mole percentage for CO2 and N2
Maximum and minimum flowing gas pressure
If all 6 “approximation coefficients” are set to “0” and z0 is set to some value, the compressibility factor becomes that value (ie compressibility factor is set to a constant). AGA NX-19: compressibility compressibilit y factor is calculated using modified version of the NX-19 met method hod whic which h utilizes utilizes the absolute absolute static static pressure pressure,, rather rather than gauge gauge pressure pres sure.. This methodo methodology logy requires requires the followin following g inputs inputs::
♦ ♦
Mole fraction CO2
♦
Mole fraction N2
Relative density
SGERG: compressibility factor is calculated based on the Standard (Simplified) GERG-88 Virial Equation. The requirements for this equation are:
♦ ♦ ♦
Relative density Mole fraction CO2
‘Hs’ the superior or gross heating value of the gas (MJ/m3 @ reference conditions of 0°C , 101.325 kPa and combustion temperature of 25°C) Disabled: no compressibility factor is calculated
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SYSTEM DESCRIPTION
4
System Description
4. 4.11 Intr Introd oduc ucti tion on
The Q.Sonic is a high accuracy, custody transfer quality meter consisting of the following components:
.
♦
A precision fabricated spoolpiece with integrated ports for mounting of the transducers.
♦
3 or 5 pairs of transducers (dependent on the design selected) which are connected via armoured coaxial cables to the SPU.
♦
The Signal Processing Unit (SPU): the electronics which control and process the signals signals to and from the transducers, transducers, and provide the capability capability of passing the results of the processed signals to peripheral equipment via serial, frequency and/or analog signals. The SPU is located w within ithin an FM certified explosion safe box housing mounted on the spoolpiece.
An overview of system is shown in Figure 4-1.
Positive flow
TR1A & 1B TR2A & 2B TR3A & 3B TR4A & 4B TR5A & 5B See Note 1
Spool piece
SPU (FM approved explosion proof encl.)
) A ) 2 m e 0 t 2 - o 4 ( N t e u e p S n ( i
) A ) m 2 0 t e 2 - o 4 ( N t e u e p S n ( i T
P
Hazardous area Safe Area SPU Power Supply (12-30Vdc) Control room
22 Flow Frequency Output (0-10 kHz) Direction 1 RS 485 Signal 1 RS 232 Signal 1 Partial Fail 1 Data Valid (See Note 3)
Notes: 1.
TR4A, 4B, 5A & 5B are only applicable to 5-path Q.Sonic Meter.
2.
The pressure and temperature inputs are only required if the C-Module is installed and corrected volume is to be calculated.
3.
The output signals indicated in the listing listing is the standard default set. See Appendices for additional information on optional outputs.
Figure 4 – 1: Q.Sonic® system overview
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SYSTEM DESCRIPTION 4.2 Path Path Config Configura uratio tion n
The Q.Sonic utilizes a unique combination of axial (single reflective) and swirl (double reflective) paths. The combination of paths provide the meter meter not only with a very representative sampling of the flow profile, but also provide information information on the magnitude magnitude of swirl in the gas stream. Utilizing the two types of path measurements allows for improved profile interpretation and correction. The 3-pathmeter meter has31axial axialand and22swirl swirlpaths fora atotal totalofof128 chords. chords, The while2 the 5-path mete r has papaths ths for swirl paths work in direct opposition to each other to determine the magnitude of the swirl. As a result of this dependency dependency between between the swirl paths, the loss of one swirl path will cause the electronics to ignore the output from the second swirl path, so as not to misinterpret the magnitude of swirl.
2 1A
1B
2A
2B
3
1
3A
3B END VIEW
TOP VIEW
Figure 4 – 2: Q.Sonic® 3-path configuration (8 chords) 3 2A
1A
1B
5
2B 1
3A
4
3B 2
4A
5A
5B TOP VIEW
4B END VIEW
®
Figure 4 – 2a: Q.Sonic 5-path configuration (12 chords)
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SYSTEM DESCRIPTION 4.3 Spoolp Spoolpiec iecee and Transducer Mounts
The spoolpiece assembly, consisting of the spool, the end flanges, and the transducer ports, is precision machined for internal diameter and port angle after fabrication. fabrication. The transducer mounting mounting hardware is attached attached to the ports on the spoolpiece. Two options are available for the transduce transducerr mounting: 1) Non-retractable: This type of transducer installation necessitates that the meter must be depressurized prior to retracting the transducer from the seal housing. 2) Retractable: With this op optional tional type of transducer transducer installation, installation, a full bore isolation valve valve is sandwiched between the seal housing and the port. Utilizing the Instromet hydraulic retraction tool, the transducer can be partially retracted to allow the isolation valve to be closed. After the isolation valve is closed and the seal housing is depressurized through the bleed valve, valve, the transducer can be safely safely removed removed and replaced. replaced.
4. 4.44 Tran Transd sduc ucer erss
The Q.Sonic uses state-of-the-art ultrasonic transducers which are designed, patented pate nted and manu manufact factured ured by Instro Instromet met Ultraso Ultrasonics nics B.V. A simple description for the operation of the transducer pair is to think of them as a speaker/microphone combination in which each transducer alternatess between the two functions. alternate functions. While one transducer transducer is acting as the speaker (sending out the acoustic signal), the other transducer is acting as the microphonee (receiving the acoustic signal). Their functions then reverse, the microphon microphone becomes the speaker and the speaker becomes the microphone. A more technical description is provided in the following paragraphs. Piezoelectric transducers employ crystals or ceramics which are set into vibration when an alternating voltage is applied to the piezoelectric element. The vibrating element generates sound waves in the fluid. Since the piezoelectric piezoelect ric effect is reversible, reversible, the element will become electrically electrically polarized and produce voltages related to the mechanical mechanical strain when the crystal is distorted by the action of incident sound waves. Because the acoustic impedance of the gas is much smaller than that of the piezoelectric piezoelec tric element, element, a matching matching layer layer between between the fluid fluid and the piezoelectric piezoelectric element is as employed to maximize the acoustic efficiency. referred to a wave guide.
This device is
Three models of transducers are available. All three aare re suitable for exchange under pressure if the meter is equipped with the optional transducer port isolation valves. The model installed in the meter will be dependent on the operating pressure pres sure and environm environment ent of the the gas gas stream: stream: Model L:
Transduce Transducerr for a pr pressu essure re range range of 116 116 to 2,175 2,175 psig psig (800 (800 to 15 000 kPa) and temperature range of -4 to 176ºF (–20 to 80ºC).
Model M: Transduce Transducerr for a pre pressure ssure rang rangee of 0 to 290 psig psig (0 to 2 000 kPa) kPa) and temperature temperature range of -4 to 140ºF (–20 to 60ºC).
Page 17 Ultrasonic Metering Division
SYSTEM DESCRIPTION
Model P:
Transduce Transducerr for a pressure pressure range range of 116 to to 2175 2175 psig psig (800 to 15 000 kPa) and temperature range of -4 to 176ºF (–20 to 80ºC). Transducer is designed for applications where high frequency noise may be present.
An illustrative drawing of the transducer transducer design is shown in Figure 4 – 3. transducer and cable cable together together form part of tuned circuit. Due CAUTION: The transducer
to the quality control utilized in the manufacturing process, transducers can be replaced with minimal impact on the meter’s accuracy (will remain within the specified uncertainty limits). The cable length, however, must not be changed under any circumstances. Changing the length may affect the properties of the tuned circuit and and therefore therefore affect meter accuracy accuracy.. Transducers are are generally installed as matched pairs. CONAX high pressure cable gland Gland connector (moulded) Cable gland
Ultrasonic Transducer
Transducer wires (moulded) Twisted pair cable (shielded, armored)
Figure 4 – 3: Model L, M and P Transducers
4.5 Signal Signal Proce Processi ssing ng Unit Unit
The Signal Processing Unit, the heart of the Q.Sonic meter, consists of the printed printe d circuit circuit boards (P (PCB) CB) mounted mounted within an explosion explosion-pro -proof/wea of/weatherther-proof proof enclosure. Its functions are:
♦ ♦ ♦ ♦
Interface with the transducers Control the timing, generation and digital detection of ultrasonic pulses
♦
Serial interface for digital data communication (RS-485 and/or RS-232)
Control the measuring process, calculate VOS, flow velocity, volume, etc. Generate output signals to peripheral device(s) (RTU or flow computer) Programmable frequency outputs Programmable current output (optional) Digital outputs for ‘flow direction direction’’ Digital output for ‘data valid’ and/or ‘partial failure’
NOTE: The RS-485 and RS-232 are not independent of each other. As a result, communication collisions may occur if each of the signals is connected to a different device and each device is performing a different function (i.e. one device is receiving and the other is transmitting information to the SPU or both devices devices are transmitting transmitting to the SPU.
Page 18 Ultrasonic Metering Division
SYSTEM DESCRIPTION
The SPU for the older Series I and Series II electronics types consists of 3 modules, a V-module, a C-module and a fuse module. With revisions to the firmware on both the V-module and the C-module, the SPU for Series III type instruments only require the V-module and the fuse module. The C-module becomes an an optional add-on in ca case se the user user requires the added functionality functionality it provides. It should be noted that all meters built in North America have two additional components within the SPU enclosure; a Frequency Control Card, and a terminal strip which provides for easier wire terminations.
4. 4.5. 5.11
Ex Expl plos osio ion n pr proo ooff enc encllosur osuree
The The SPU electronics are contained within an FM certified explosion-proof enclosure. The enclosure is 10" by 10" by 6" for the 3-path meter and 14" by 10" by 6" for the 5-path meter. The enclosure is equipped with three or five (dependent on enclosure size) ½ inch NPT connections on each side for ease in routing transducer wiring. The enclosure is also equipped with two 1-inch NPT openings on the bottom for power and signal wiring (to RTU or flow computer). The specifications on the enclosure are: Manufacturer Enclosure Series Catalog number NEMA Enclosure Type Standards Compliance Hazardous Location Rating
CENELEC
*
Enclosure Specifications
FM Approval *
Adalet XCE or XCEX Explosionproof 101006-N4 or 101406-N4 NEMA 4, NEMA 7, NEMA 9 - CSA and/or cUL Standard 22.2 No. 30 - UL Standard 1203 Explosionproof for use in: Class I, Groups C, D Class II, Groups E, F, G Class III EExd IIB (XCEX Series enclosure only)
Adalet XCE or XCEX Explosionproof 101006 or 101406
NRTL listed and explosion proof for use in: Class I, Div 1 Groups B, C, D
Factor Factory y Mutual Mutual “Cer “Certificate tificate of Comp Compliance” liance” can be o obtaine btained d fro from m the Appr Approvals ovals page on the the Instromet website: www.instrometinc.com
4.5.2
Modules
The electronics of the SPU is comprised of three modules: ♦ V-Module: The V-Module consists of 2 printed circuit boards, the PROTRAN and the PROSON-II . The PROTRAN board contains the analog circuits for transmitting and receiving the ultrasonic sound pulses. Automati maticc Gain This card also contains the components of the receiver’s Auto Control (AGC). The second printed circuit board (PCB), the PROSON-II, is a micro controller system which interfaces with the PROTRAN and the optional C-Module. The PROSON controls the transmit/receive transmit/recei ve timing of the ultrasonic sound pulses and the PROTRAN’s AGC circuits. The PROSON’s main tasks are recognition and quality analysis of the received sound pulses, travel time measurement and calculation of sound and gas velocity and actual gas volume. The Proson-II board processes the measured data from each of the individual paths from which it can then calculate the volume flow based on the known meter parameters. This information is made available to
Page 19 Ultrasonic Metering Division
SYSTEM DESCRIPTION the user via the frequency, digital, and serial outputs (RS-485 & RS-232) from the board. If the optional C-module is installed, these outputs will not be available directly from the Proson-II board, but will be passed through to the C-module. The Proson-II board also contains a DC/DC converter, which converts the externally supplied DC voltage to those required by the SPU internally plus providing providing isolation for the SPUs SPUs circuitry. circuitry.
♦
C-Module (optional): The C-Module, is a micro controller system which primarily prim arily controls controls the analog outputs outputs and analog analog pressure pressure and tempe temperatu rature re inputs. The firmware also allows it to perform compressibility calculations and thereby correct the “actual” volumes (as received from the V-module) to the volume at a specified set of base conditions. The C-Module also also passes the processed results on to the outside world, using the serial interface (RS485), the frequency output, the current output ‘Data Valid’ and ‘Flow Direction’. It also contains the necessary A/D and D D/A /A converters for the analog inputs and output.
♦
Fuse Module: The fuse module is a printed circuit board that provides transient protection and a filter for high frequency noise on the power supply.
NOTE:
Series II electronics can be upgraded to Series III electronics. Instromet should be contacted about this ‘upgrade kit’ and the benefits of such an upgrade. The following figures show schematic diagrams of the SPU.
Q.Sonic Meter
TR1A & 1B TR2A & 2B TR3A & 3B TR4A & 4B TR5A & 5B
(See Note 1)
m o o R l o r t n o C
PROTRAN
SPU Power Supply ( 12 – 30 Vdc) 2 Frequency Outputs (0 – 10 kHz, opto coupler) 2 Flow Direction (opto coupler) 2 Serial Communications (RS 232 and RS 485) 1 Partial Fail (opto coupler) 1 Data Valid (opto coupler) (See Note 2)
T B 1 & T B 2
FUSE MODULE
PROSON II
V-MODULE FREQUENCY CONTROL CARD
Standard SPU with 2-board electronics (no analog I/O)
Page 20 Ultrasonic Metering Division
SYSTEM DESCRIPTION
Q.Sonic Meter
TR1A & 1B TR2A & 2B TR3A & 3B TR4A & 4B TR5A & 5B
l a n o i t l p a O n o i t ) p A O m - 0 ) 2 A 4 m ( t 0 u 2 - p n 4 ( I t e u r u p t n a I r e r e p u s m s e e r T P
m
o o R l o r t n o C
SPU Power Supply ( 12 – 30 Vdc) 2 Frequency Outputs (0 – 10 kHz, opto coupler) 2 Flow Direction (opto coupler) 1 Serial Communications (RS 485) 1 Data Valid (opto coupler) 1 Current Output (4 – 20 mA) (See Note 2)
(See Note 1)
PROTRAN
T B 1 & T B 2
FUSE MODULE
PROSON II
V-MODULE FREQUENCY CONTROL CARD
C-MODULE
SPU with 2-board electronics and C-module (analog I/O) Notes: 1.
TR4A, 4B, 5A & 5B are only applicable to 5-path Q.Sonic Meter.
2.
The output signals indicated in the listing is the standard default set. The frequency, digital (flow direction), and analog outputs may be customized to meet the users requirements.
Figure 4 – 4: Signal Processing Processing Unit (SPU)
4.5.3 Frequency Control Card 4.5.3 The Frequency Control Card (enhanced version of the older frequency splitter board) provides the user with additional flexibility in the frequency and flow direction signals signals from the SPU. The 4 outputs from this board are configured via a rotary switch. The following table lists the outputs from the Frequency Control Card, based based on the setting setting of the rotary switch. As can be seen, the available selection of outputs will meet all the signal requirements for most standard measurement installations.
Page 21
Ultrasonic Metering Division
SYSTEM DESCRIPTION
SW1 Settings Settings TB2 OUTPUTS SWITCH SETTING
1
2
3
4
TB2 (1+ 2-)
TB2 (3+ 4-)
TB2 (5+ 6-)
TB2 ( 7+ 8-)
0 1 2 3 4 5
FF F FF F FF/100 F/100
RF F FF F RF/100 F/100
FD FD RF F FD FD
RD RD RF F RD RD
6 7 8 9
FF/1000 F/1000 F/1000 100 Hz 5 kHz
RF/1000 F/1000 100 Hz 5 kHz
FD FD Open (off) Open (off)
RD RD Open (off) Open (off)
Abbreviations: F – – F Frequency requency (Both Fwd and Rev) RF RF – – Reverse Flow Frequency
MODE OF OPERATION
Bi-directional mode Uni-directional mode Bi-directional custody (no FD out) Quad output (no FD out) Bi-directional (divide by 100) Uni-directional (divide by 100) Bi-directional (divide by 1000) Uni-directional (divide by 1000) Test Mode (100 Hz) Test Mode (5 kHz)
FF – FF – Forward Flow Frequency RD RD-- Reverse Flow Direction
FD – FD – Forward Flow Direction
For additional details on the capabilities and specifications of this board, please refer refer to Appendix Appendix A.
4.5.4 Terminal Strip 4.5.4 To assist in the installation and speed up the wiring installation, all meters built in North American American have all the input and output wiring terminations terminations located on a terminal strip attached to the inside wall of the SPU enclosure. A factory installed wiring harness takes care of the connections between the SPU, Frequency Control Card, and the terminal strip eliminating the need for the user to install any Phoenix connectors. All terminations on the terminal strip are of the standard screw-clamp type.
4.6 Basic Basic Input Input and and Outpu Outputt Features
The The Q.Sonic with the Series III electronics (2-board) can provide frequency output signals based upon the calculated values for actual volume, average pipeline gas velocity, velocity, or gas VOS. If the optional C-module C-module is added, each of the aforementioned signals is also available in an analog format (4-20 mA). In addition, if the customer supplies temperature and pressure input signals to the C-module, the corrected volume can also be provided as one of the output values. These outputs can be configured to the analog output (4-20 mA), the frequency, or both in any any combinati combination. on. The frequency upper upper limit should not be set higher than 10,000 Hz. Although the frequency ca can n be programmed to a maximum value of 12,000 Hz, a maximum of 10,000 is recommended, to allow for over-rangin over-ranging g and error frequency configuration. See Section 4.9.12 for information regarding the error frequency.
The measurement units for volume (actual or corrected), average pipeline gas velocity, or gas VOS can be in either US or SI.
4.6.1 Frequency Outputs The T he frequency output is a programmable opto-coupler output. Utilizing UNIFORM, the following properties can be configured for this output:
♦ ♦
Range of the measure value
♦
Output frequency range
Measured value represented (ie gas volume, gas velocity, gas VOS)
Page 22
Ultrasonic Metering Division
SYSTEM DESCRIPTION
A Although lthough the frequency output(s) originate from the Proson-II board, meters
built in North America, have the frequency outputs redirected throught the Frequency Control Card. This provides the user with additional choices with respect to the frequency outputs. A Although lthough the Frequency Control Card provides the user with the option of
two or more frequency type output signals, only one measured value is being represented. In the meters set up same for bi-directional flow, the measured value represented bycase the of frequency is the in either direction. S See ee Appendix A for detailed specifications on this card.
4.6.2 Analog Inputs The T he optional C-module provides two programmable 12-bit 4-20 mA analog inputs. These can only be used for pressure and temperature transmitter inputs, if corrected corrected volume volume output is required. A separate power power supply is required for the transmitters (the SPU will not power the transmitters). Please see the wiring diagrams in the Appendix B for more details.
NOTE: The corrected volume accuracy is not ‘custody transfer’ quality. If the ‘Approximation Methodology’ Methodology’ is used, the compressibility compressibility computation is generally accurate to within 0.2% over most operating conditions. If the AGA NX-19 or SGERG methodologies are used, the compressibility is accurate to approximately 0.1%. This assumes that the gas composition utilized in the calculation is reasonably representative of the actual gas flowing through the meter.
4.6.3 Analog Outputs The T he optional C-module has one programmable 12-bit 4-20 mA analog output With UNIFORM, the following properties can be configured for this output:
♦ ♦ ♦
Measured value represented (ie gas volume, gas velocity, gas VOS) Range of the measure value Output frequency range
A separate power supply is is not required for this output. Please see the wiring diagram in Appendix B for details.
4.6.4 Serial Data Communication T The he Series III electronics (2-board) Proson-II board has both RS-485 and an
RS-232 serial communication outputs. If the optional C-module (Series III, 3 board electronics) electronics) is installed, only the RS-485 serial data link will be available. With the proprietary software, UNIFORM, (utilizes the UNIFORM Protocol) all measurement, diagnostic and configuration data can be obtained via the RS-485 serial communication link and a serial interface converter, or directly via the RS-232 serial communication link. This serial link is also used to configure the meter. meter. Data is updated once per second, and is transmitted automatically. That is, the SPU does not need to be ‘polled’ to send information. The end device must must be capable of receiving data once per second if direct communication with the SPU is desired.
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SYSTEM DESCRIPTION
Alternately, Alternately, all the measurement, diagnostic and configuration data can be obtained via the Modbus RTU protocol. The Series III electronics allow direct communication with the meter via Modbus protocol using the RS-485 serial link (protocol converter not required). Dependent on the end device to which the meter is supplying information an RS-485 to RS-232 interface converter (supplied with the meter) may be required. Some RTUs are capable of communication via RS-485. Computers (laptops), however, communicate via RS-232 and must therefore be connected directly to an RS-232 signal or if connected to the RS-485 signal, the interface converter is required. Older meters equipped with the 3 board Series II electronics require a protocol converter for applications applications for serial communication communication between the ultrasonic meter and RTU (or flow computer) or direct communication with the meter utilizing the modbus protocol. P Please lease see Section 4.10 for details on an optional protocol converter, which is
addressable, and does require polling.
4.6.5 Data Valid Signal The The SPU provides a digital status signal for indication of measurement problems via via a separate separate opto-isolated opto-isolated out output. put. This includes includes problems problems with gas VOS out of range, gas velocity out of range, poor performance, and several other diagnostic parameters. For more detailed information on this signal, Ultrasonic Flow Meter Troubleshooting Troubleshooting Manual. please see see the Instromet Ultrasonic It is an opto coupler output with the following characteristics:
♦
Active (conductive) when values related to measurement are within accepted ranges (as specified in set-up parameters)
♦ Non-conductiv Non-conductivee
when values are out of range, meter is in Programming Programming Mode or power is lost
The criteria with respect to the Data Valid signal is somewhat dependent on the source of of the signal. If the signal is output from the Proson-II Proson-II board, (Series III 2-board electronics) electronics) then it will be dependent dependent on the validity of the measured data/processed data from the meter itself (i.e. performance, VOS, gas velocity, etc.). If the optional C-module is installed and is the source for the Data Valid signal, then it will be dependent on the validity of the Data Valid signal from the Proson-II board plus the validity of the pressure and temperature inputs with respect to the ranges specified.
NOTE: The opto-coupler outputs are non-active outputs and therefore need to be externally externally powered.
4.6.6 Partial Failure Signal 4.6.6 The Partial Fail is a new digital signal only available with the Series III electronicss with the 2-board configuration (no C-Module). electronic
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SYSTEM DESCRIPTION It is an opto coupler output with the following characteristics:
♦ Active (conductive) (conductive) when all the meter paths are functioning properly Non-conductivee when there is a fa failure ilure on one or more paths paths ♦ Non-conductiv If the optional C-module is added, the digital output related to the Partial Failure is not available.
NOTE: The opto-coupler outputs are non-active outputs and therefore need to be externally externally powered.
4.6.7 Flow Direction Signals The T he Frequency Control Card in the SPU enclosure can provide two optoisolated outputs for indication of flow direction (i.e. one output for each flow direction). When the card has been been configured configured to provide provide redundant redundant (duplicate) frequency outputs, this signal is the only indicator as to the direction of flow. If the Frequency Control Card Card has been configured configured to provide a separate separate frequency frequency output for flow in each each direction (SW1 (SW1 = 0 - ‘As Shipped’ configuration, or SW1 = 4 or 6), then the flow direction signal can be utilized utilized as a sstatus tatus indicator. indicator. The Flow Direction signal is an open collector output with the following characteristics:
♦ Active (conductive) when flow is in the “Forward” direction ♦ Non-conductiv Non-conductivee when flow is is in the “Reverse” “Reverse” direction
NOTE: See Appendix A for specifications on the Frequency Control Card and flow direction signals.
4.7 Power Requirement
ll Q.Sonic meters shipped after January 1, 1998 can be operated on voltages A All
from 12 to 30 VDC with no electronic electronic wiring wiring changes. changes. The SPU draws approximately 6 watts during normal operation (about 250 mA at 24 VDC, and increases with reduced input voltage). However, the recommended supply voltage is 24 VDC as this reduces input current, which will minimize wiring size. A 24 VDC supply will also permit operation of pressure and temperature transmitters from the same external power source (i.e. SPU can not power the pressure or temperature transmitters), transmitters), if the meter is set-up and configured configure d to calculate corrected volumes. For voltage requirements on units shipped prior to this date, please consult Instromet.
4.8 Communication – UNIFORM Software
NIFORM is a software tool that allows configuration and monitoring of any U UNIFORM
Instromet ultrasonic gas flow meter, via a personal computer utilizing the serial data communication. It utilizes the ‘virtual instrument’ concept to transform the PC into a measurement instrument with a user-friendly graphical interface. UNIFORM also allows for uploading/downloading uploading/downloading of set-up parameters, diagnostics, as well as ‘logging’ data in a standard ASCII or text file format.
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SYSTEM DESCRIPTION UNIFORM V Ve ersion
UNIFORM 1.41 & earlier UNIFORM 2000
Operating Sy System Co Compatibility
Operates on DOS (Version 3.0 and higher) Windows 3.1, 95, 98, NT4, Me & XP compatible NOT Windows 2000 compatible (must be opened in DOS on computers running this OS) Windows 2000, Me, XP and 9x compatible
T The he UNIFORM software and UNIFORM User’s Guide are provided with the meter. If additional copies are are required, please contact Instromet.
UNIFORM offers a variety of functional capabilities. capabilities. These are:
♦
Configuration: UNIFORM permits the user to read the flow meter’s operational parameters from the device, to change them, and to write the new settings back to the device. A complete set of operational parameters is called a Parameter Set-up. Parameter Set-ups can be saved to and loaded from the PC’s hard disk.
♦
Monitoring: UNIFORM has on-line displays for real time monitoring of the operational status and measurement data of an individual meter.
♦
Data Logging: UNIFORM features a versatile data logger which allows the capture of measurement results for off-line data processing.
For a more detailed explanation on the use of this software please refer to the UNIFORM User’s Guide.
4.8.1 Requirements for running UNIFORM UNIFORM was developed for an IBM (or fully compatible) personal computer. The minimum system requirements to run UNIFORM are:
♦
IBM PC AT, PS/2, or fully compatible personal computer with the Intel 80486 processor (or higher), and at least 8 MB RAM (32 MB required for UNIFORM 2000)
♦ ♦ ♦ ♦ ♦ ♦
Hard disk with 5 MB of free disk space, and a 3.5 inch floppy disk drive
♦
IBM VGA, or compatible graphics adapter VGA monitor Two serial ports, or one serial port and a dedicated mouse port Microsoft, IBM PS/2, or fully software-compatible mouse MS-DOS 3.0 or later or Windows 3.1, 9x, NT4, Me or XP (Windows 9x, 2000, Me or XP for UNIFORM 2000) If the RS-485 serial output from either the Proson-II or the C-module is used, an RS-485/RS-232 converter capable of:
Bi-directional data transmission
4800 baud data rate rate (Note: (Note: 4800 is the default default rate. rate. The converter converter must be capable of 9600 / 19200 / 38400 baud to utilize the higher baud rates allowed allowed by the meter) meter)
Half-duplex operation with user transparent (automatic) bus direction control. UNIFORM does NOT use the serial port’s modem control
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SYSTEM DESCRIPTION signals, so the converter must deduce its bus direction control signals from the data stream itself.
NOTE: Instromet supplies the converter with all meters. 4.9 Parameter Set-up
The Q.Sonic’s operation and signal output are controlled by a programmable set of parameters, (including elements such as path length, path angle, etc.) which are stored in the SPU’s non-volatile memory. memory. The so called ‘parameter ‘par ameter set-up’, is divided into several categories in UNIFORM. Each parameter set-up is accessed through an individual panel. The following is a summary of the panels ( the names shown in parentheses parentheses are the names of the tabs in UNIFORM 2000):
♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦
PROSON-II Configuration (PROSON II Configuration) Module Information (Module Info) Spool Piece Parameters (Spool Piece) V-Module Parameters (V-Module) Profile Correction Parameters (Profile Correction) Calibration Parameters (Calibration) Adjust Factor (Adjust Factor) Low Pass Filter Set-up (Low Pass Filter) Low Flow Cut-off Set-up (Low Flow Cut-off) P&T Input Parameters (Inputs) PTZ Volume Correction (PTZ Volume Correction) Current Output Set-up (Current Output) Frequency Output Set-up (Frequency Output)
4.9.1 PROSON-II Configuration 4.9.1 This panel requires the input of 5 low level parameter settings which specify various aspects aspects of functionality functionality for the electronics. electronics. These are set set at the factory and should not be altered unless these properties within the meter need to be changed. Please contact Instromet before altering any of these values. NOTE: This panel and the parameter settings required herein are only applicable to Series III electronics or Series II electronics which have been upgraded to Series III electronics.
4.9.2 Module Information 4.9.2 The parameters related to Module Information are the firmware version, meter serial number, and the Id string which provides additional information about the meter/electronics. This information is “Read Only”, and therefore noneditable. NOTE: This panel and its functionality are only applicable to Series III electronics or Series II electronics which have been upgraded to Series III
electronics.
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SYSTEM DESCRIPTION 4.9.3 Spool Piece Parameters The spool piece parameters describe the flow meter's geometry:
♦
Diameter ( D): D): This is the spool piece’s (pipe section’s) true inner diameter. It is used in the Reynolds Reynolds number based velocity profile correction,, and for conversion of flow velocity to volume flow. correction
♦
Path Length ( L): L): This is the straight line length of the acoustic path
between the two transducers. It is used in the calculation calculation of the uncorrected flow velocity. velocity. Series II electronics only allowed for the input of one (average) path length for the axial paths and one for the swirl paths. The length of each individual path can be input on Series III type meters.
♦
Beam Angle (ϕ ): ): This is the angle between the acoustic path and the axis of the spool piece. It is also used in the calculation calculation of the uncorrected flow velocity. As with path length, Series II electronics electroni cs only allowed for the input of one (average) path angle for the swirl paths and one (average) path angle for the axial paths. The angle of each individual path can be input on Series III type meters.
4.9.4 V-Module Parameters The V-Module parameters basically control the Q.Sonic’s measurement process. These parameters process. parameters are considered considered to be either either applicat application-s ion-speci pecific, fic, or device-specific. Default values values have been entered at the factory factory for all VModule parameters. parameters. They should not require adjustment. adjustment. If in doubt about any of these default settings, as they may apply to a specific application, please contact Instromet. Application-specific Application-sp ecific parameters parameters::
♦
V.o.S. Range: The velocity of sound (VOS) depends on gas composition, temperature and pressure, and is therefore specific to the metering application. Based on normal pipeline gas composition, composition , pressure and temperature, a default range of 1,000 to 1,600 ft/sec (305 to 488 m/sec) has been entered at the factory. This range will permit satisfactory
operation from 250 to 1480 psig (1 725 to 10 200 kPa) and 0 to 120 ºF (18 to 49ºC).
♦
Gas Velocity Range: This is the expected range of flow velocities in the metering application. The gas velocity range at which the meter will operate properly is dependent on the metering application and is included in the default set-up supplied with the meter. If no gas velocity range is specified, a default range of –130 to 130 ft/sec (-40 to +40 m/sec) should be used.
The combination of VOS and gas velocity ranges are used by the control and signal processing circuits to calculate the time-window in which received pulses are expected to be valid, and to validate received pulses during lowlevel processing.
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SYSTEM DESCRIPTION Device-specific Device-spe cific parameters: parameters:
♦
Sample Rate: This parameter controls the frequency at which the travel time between the transducers is measured (as described in Section 3, Theory of Operation). A sample rate of 15 is good in most applications.
♦
Timing Constant (1/2/3): These low-level control parameters which depend on the hardware hardware (electronics and transducers) transducers) of the mete meter. r. They
will affect the meter’s to determine actual VOS and consequently volume. The ability timing constants shouldthe not be altered.
♦
Pulse Length: This is a low-level control parameter which depends on the hardware (electronics and transducers) of the meter. meter. It will change the voltage to the transducers thereby impacting the pulse signal. It should not be altered. altered.
CAUTION: All three device specific parameters are normally included in the default configuration. Altering any one of these parameters may have a significant impact on meter accuracy.
4.9.5 Velocity Profile Correction These parameters control the conversion from path averaged flow velocity (as calculated time-of-flight measurements along the acoustic tonthe bulk mean from mean velocity velocthe ity of the fluid fluid (the velocity velocity averag averaged ed over the cross crosspath) section sectio of the pipe). The profile correction parameters parameters are grouped into two categories. Reynolds Number Number Computation Computation:: Since the calculation of the bulk mean velocity, vm, is dependent on the Reynolds number, information with respect to the density and dynamic viscosity of the gas is required.
♦ ♦
Density: Density of the gas at average line (metering) conditions. Dynamic Viscosity: Dynamic viscosity of the gas at average line (metering) conditions.
The conversion from the path averaged flow velocity to the bulk mean velocity is relatively insensitive to the density and viscosity. A deviation by a factor of two for either parameter parameter results in an insig insignificant nificant erro error. r. As a result of this insensitivity, a single value for each will be representative over a large range of compositions, temperatures and pressures in a specific metering application. The factory default settings for the density and viscosity may need to be adjusted for specific natural gas metering applications. These values can be determined by using the logarithmic average of the minimum and maximum values expected calculated as follows: ρ
=
ρmin ρ max
⋅
(4.1)
η
=
ηmin ηmax
⋅
(4.2)
and
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SYSTEM DESCRIPTION The density and dynamic viscosity may be calculated using SonicWare™ or any other software employing the equations of state contained in AGA Report No 8. Profile Correction Correction Coefficien Coefficients ts: The flow profile, even in a straight pipe, is always curved; i.e. the velocity at the wall equals zero while the velocity in the middle is at its maximum. The Reynolds correction provides a means for compensating for this deviation. t Based on the Reynolds number, an n order equation is used for the correction. The coefficients for for this equation are set out in the matrix for the ‘Profile Correction Correction Coefficients’ Coefficients’ in the Parameter Parameter Set-up. For a meter such as the Q.Sonic, with the combination of axial and swirl paths, a 6 by 2 matrix of coefficientss is used. These coefficients, coefficient coefficients, labelled labelled ‘p1’ through ‘p6’ for ea each ch of the path designs are used by the flow meter to calculate the Reynoldsdependent profile correction factor. These coefficients are set based on the size and design of the meter.
CAUTION: The ‘Profile Correction Coefficients’ are programmed into the Parameter Set-up at the factory, and should never be altered without consultation consultatio n with Instromet. Changing them will impact the meter meter accuracy significantly.
4.9.6 Calibration Parameters This is a 6 by 4 matrix of coefficients whose purpose is to correct for distorted flow (velocity) (velocity) profile effects. effects. These distortions distortions are also referred referred to as nonsymmetricall and/or swirling symmetrica swirling flow profiles. This matrix of of coefficients coefficients is based on the database of test results from testing done at the various calibration facilities. Based on the accumulation of additional data, the values for the matrix may be updated from time to time. These coefficients are set based on the the size of the meter. meter.
CAUTION: The ‘Calibration Parameters’ are programmed into the Parameter Set-up at the factory, and should not be altered without consultation with Instromet. Changing them may impact the m meter eter accuracy significantl significantly. y.
4.9.7 Adjust Factor The ‘adjust factor’ is used to correct for any bias in the ultrasonic flow meter. The bias is determined determined based on a flow proof at a test facility. The majority of Q.Sonic meters are sent to an accredited calibration facility to determine what bias exists in the meter, relative relative to known known standards. standards. Once the bias has been determined, a factor is entered into the parameter set-up to off-set the meter bias (i.e., if during the flow proof of the meter it is found to register 0.2% higher than the know standards, then an ‘adjust factor’ of 0.9980 would be entered to adjust for the meter bias). Series III meter types have provisions for an adjust factor for each direction of flow, if the meter is to be used in a bi-directional applicatio application. n.
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SYSTEM DESCRIPTION 4.9.8 Low Pass Filter Set-up Q.Sonic meters feature a low pass filter which is used to average some of the Q.Sonic’s measured data (i.e. VOS, flow velocity and volume flow). This feature is useful when the output fluctuates significantly over a short period of time and a smoothed output is desirable.
CAUTION: Using this feature may impact measurement accuracy.
♦
Mode: The mode has three settings: ‘Off’: No low pass filtering. ‘On (Fast Alarm)’: Measured data are low pass filtered with ‘Fast Alarm’ output. With ‘Fast Alarm’ Alarm’ output, the most most recent measured measured value determines the state of the Data Valid contact. ‘On (Slow Alarm)’: Measured data are low pass filtered with ‘Slow Alarm’ output. With ‘Slow Alarm’ output, the Data Valid contact signals invalid data when the meter has been unable to obtain a valid measurement for a period of time greater than the ‘Filter Time Constant’.
♦
Filter Time Constant: The number of seconds over which the measured value will be averaged.
4.9.9 Low Flow Cut-off Set-up 4.9.9 ♦ Mode: Due to the sensitivity of the meter, transients and/or meter uncertainty may cause the meter to indicate gas flow at the lower extreme of the meter meter range when in fact there is no flow. As an example, there may be no physical flow through the pipe, however, due to temperature gradients or pressure fluctuations, the gas in the pipe may be moving. The meter may detect this gas movement as flow, and subsequently indicate that there is physical flow through the pipe when in fact there is none. This is particularly applicable applicable if the lower limit of the gas veloci velocity ty has been set to zero. To eliminate these potentially erroneous readings, the Low Flow Cut-off can be activated by setting the “Mode” to “On” and entering a Low Cut Threshold velocity. This will result in the meter equating the flowing volume to “zero” whenever the v velocity elocity is below the threshold. threshold . See Figure 4 – 5 for an illustration of the affect of activating the Low Flow Cut-off.
♦
Low Cut Threshold: the m minimum inimum velocity for which the meter will indicate a volume greater than zero. When the measured velocity is below this value, the meter will will indicate indicate the volume volume flow as as zero.
4.9.10
P&T Input Set-up
If required, the actual volume as determined by the meter can be corrected to a volume at a set of base base or reference reference conditions. conditions. To obtain the corrected corrected volume output from the meter, the optional C-module, which accepts the analog (4 –20 mA) signals from the pressure and temperature transmitters (customer supplied), supplied) , must be installed. The set-up allows for the configuration of the upper and lower range of the inputs from the transmitters.
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SYSTEM DESCRIPTION The reference or base conditions, plus a compressibility calculation methodology are also required.
NOTE: The system requires that the pressure input is representative of the absolute values values (psia in US units or kPa(abs.) kPa(abs.) in SI units). This means that the pressure signal signal must include include the the local atmospheric atmospheric pressure.
♦
Pressure Input: Provides for selection of the Mode (Live, Disabled or Fixed) for the pressure input. input. If Live is selected selected the range limits for the 4 – 20 mA signal needs to be set. If Fixed is selected the pressure setpoint must be specified.
♦
Temperature Input: Provides for selection of the Mode (Live, Disabled or Fixed) for the temperature temperature input. If Live is selected the range limits for the 4 – 20 mA signal needs to be set. If Fixed is selected the temperature setpoint must be specified.
4.9.11
PTZ Volume Correction
This set-up panel is used in conjunction with the P&T Parameters when correcting the actual actual volume to a set set of base or reference conditions. The user can select one of the three volume correction methodologies:
♦
Approximation Method: a polynomial equation which can approximate the compressibility of the gas. (Instromet must determine the applicable coefficients) This methodology is available on both Series II and Series III electronics with a C-Module
♦
SGERG: compressibility is calculated based on the Standard (Simplified) GERG-88 Virial equation. This methodology methodology is only available available on the Series III electronics with a C-Module.
♦
AGA NX-19: compressibility is calculated using a modified version of NX-19.. The modificat NX-19 modification ion allows allows for the use of absolute absolute pressure. pressure. This methodology is only available on the Series III electronics with a CModule.
Base Conditions: Conditions:
♦ ♦ ♦
P0: Base (or reference) reference) pressure T0: Base (or reference) temperature z0: Compressibility at base (or reference) conditions (applies to Approximation Method only)
Compressibility Set-up:
♦
Approximation Coefficients: A set of 6 coefficients labelled 'a1' through 'a6’ are used by the flow meter to calculate the compressibility of the gas at line conditions. These coefficients are only required for the Approximation Method. ♦ Gas Composition Data: For the AGA NX-19 calculation the Relative Density, and mole fraction CO2 & N2 are required. For the SGERG
calculation, the Relative Density, mole fraction CO2 and the superior (gross) heating value of the gas are required.
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SYSTEM DESCRIPTION
♦
Valid Pressure Range: The pressure range for which the approximation coefficients are valid. If the NX-19 and SGERG methods are selected, the valid pressure range is predefined and can not be altered.
♦
Valid Temperature Range: The temperature range for which the approximation coefficients are valid. If the NX-19 and SGERG methods are selected, the valid temperature range is predefined and can not be altered.
The Approximation Coefficients are dependent on the composition of the gas and the temperature and pressure range at which the gas is being measured. Instromet should be contacted to determine a set of coefficients that are applicable to the specific metering application. In order to determine these coefficients, the minimum, maximum and average values for SG, N 2, CO2, pressure and temperature temperature are required. required.
NOTE: The calculation of the volume at base conditions is intended for operational purposes only. The methodology utilized to approximate the compressibility does not meet most custody transfer quality requirements as it has a typical accuracy of ±0.1%.
4.9.12 Current/Frequency Output Set-up Although UNIFORM has separate panels for the current and frequency outputs, the explanation for the two has been combined due to the commonality commonali ty of the two. It must be noted, noted, however, that that the optional Cmodule must be installed to have the analog output. The T he Q.Sonic can provide output signals based upon the calculated values for volume (actual or corrected), average pipeline gas velocity, or gas VOS. They can be configured on the analog output (4-20 mA), the frequency output, or both in any combination. combination. The frequency frequency output has a maximum maximum full scale of 10,000 Hz, and can be configured to meet any full-scale requirement. Although the SPU is capable of producing up to 12,000 Hz at full scale, a full-scale value exceeding 10,000 should not be used in the parameterr set-up. paramete The 10,000 Hz will allow for over-ranging over-ranging and configuration of an ‘error ‘error frequency’. frequency’. Since m most ost customers customers prefer using 5,000 Hz for full scale, the meter is shipped with this configuration. configuration.
The measurement units for volume (actual or corrected), average pipeline gas velocity, or gas VOS can be in either US or SI.
NOTE: For the computation of corrected gas volumes, the customer must supply the temperature and pressure signals to the meter.
♦
Output Value: Allows the selection of the calculated value for which an output signal is being configured. VOS Corrected gas velocity Volume flow at line conditions (actual)
Volume flow at base conditions (standard)
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SYSTEM DESCRIPTION The correlation between the calculated value selected and the analog (current) or frequency output are set-up by matching the range limits.
♦
Output Value Range: The lower and upper limits of the calculated value which are to be represented by the current or frequency output.
♦
Current/Frequency Range: The lower and upper limits of the current or frequency which represent the calculated value.
♦
Error: The output current or frequency desired if the measured value is invalid.
♦
Low Cut Option: Measured values between the lower range limit and the ‘Low Cut Value’ value will result in an output signal equal to the lower limit set set for the signal output. Enabling this option will will allow for the entry of a ‘Low Cut Va Value’. lue’. See Figure Figure 4 – 5 for an illus illustration tration of the affect of activating the Low Cut Option.
♦
Low Cut Value: the value for which the output remains at the lower current or frequency limit for calculated values between the output value range’s lower limit and the Low Cut Value.
t u p t u O t n e r r u C r o y c n e u q e r F
Error Value Upper Limit
Lower Limit Lower Low cut Limit Value
Upper Limit
Output Value (velocity, ACFH, etc.)
Figure 4 – 5: Affect of Low Cut Option
NOTE: The current or frequency outputs represent the absolute value (i.e. no sign to indicate whether the value is positive or negative) of the calculated value that was selected! When using the current or frequenc frequency y output to represent, for example, gas velocity (or volume flow), the flow direction can NOT be represented by output signal. signal. The flow direction is only available available at the digital Flow Direction Output.
4.10 Equipment Equipment and Software Software Options
With W ith exception of the power supply and wiring from SPU to RTU or flow computer, the Q.Sonic meter is shipped with everything required for installation and operation. Instromet does, however, provide some additional hardware for specialized specialized installations or applications. applications.
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SYSTEM DESCRIPTION
The following is a list of options curren currently tly available available.. This list is constantly constantly being updated as customer customer require requirements ments change. change. Please contact contact Instromet for any specific needs which the following do not address.
♦
RTU Modbus protocol converter for applications where RS232/485 serial data communication is desired utilizing this protocol. (The Modbus converter is only required for Series II SPU. It is not required for communication on the Series III SPU as this functionality has been incorporated into the electronics).
♦
Software for computing the pipeline gas VOS, density and dynamic viscosity. This software employs equations of state set forth in AGA Transmission Measurement Committee Report No. 8. (can be used for set-up diagnostics and routine maintenance).
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INSTALLATION/START-UP
5
Installation/Start-up
5. 5.11 Intr Introd oduc ucti tion on
This chapter provides a brief summary of instructions for the configuration of the SPU once the Q.Sonic has been installed. A more detailed discussion is provided in the Instromet Q.Sonic® and S.Sonic Installation Manual . Configur ation of meter electronics Configuration electronics requires the use of UNIFORM. For a complete description on how to use this software, please refer to the UNIFORM User’s Guide. A thorough understanding understanding of this package package is required for proper configuration. The meter’s electronics are shipped with a set of default settings for each of the parameters. The meter’s diameter is based on physical measurements of the meter after after it has been fabricated. fabricated. The path length and path angle angle are based on physical physical measurements measurements which have been been optimized optimized based on the dry calibration of the meter, prior to shipment. An example meter configuration for a 12 inch meter is shown in Appendix D.
5.2 Shipme Shipment nt Inspect Inspection ion
It is very important to check the ultrasonic flow meter equipment after shipment. As a minimum, a visual inspection of surfaces, flanges, tubing and transducer cables should be performed along with a check of the packing list to ensure all the equipment is included. In case of damaged or missing equipment, contact Instromet immediately.
5. 5.33 Q.So Q.Soni nicc ® Meter Installation
Detailed instructions for the proper mechanical and electrical installation for the Q.Sonic are provided in the Instromet Q.Sonic® and S.Sonic Installation Manual . These installation procedures must must be followed very carefully as they will have a significant impact on measurement quality. Although the Q.Sonic is a high accuracy, custody transfer quality meter, the key to ensuring this high level of accuracy is the proper installation of the meter. This entails having adequate up and downstream piping. Flow conditioning conditioni ng is generally not required. If in doubt, please contact Instromet.
CAUTION: Care must be taken when installing the Q.Sonic to ensure that gaskets installed between the flanges do not protrude into the pipe. Any protrusion into the flowing gas stream may disrupt the flow profile and increase the measurement uncertainty of the meter.
5.4 5.4 Installing The Parameter Set-Up
The SPU is shipped with a configuration which is consistent with the information informatio n provided for the particular metering installation. To ensure that the meter accuracy remains within the specified range for the meter, the parameters paramete rs with respect to the Spoolpiece, Spoolpiece, V Module, Profile Correction, Calibration, or Adjust Factor must not be altered. This is particularly important if the meter has been calibrated at an accredited test facility. The certified accuracy of the meter is based on the parameter set-
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INSTALLATION/START-UP up in the meter. This parameter set-up is part of the accuracy certificate. The output signals may require requir e configuration. configuratio n. Details on the configuration configuratio n of these signals are found in the UNIFORM User’s Guide and Section 4.9.12 of this manual. Most customers prefer to receive a pulse output based upon volume, not gas velocity. Therefore, the appropriate appropriat e maximum ACFH must be configured. This value is available under the ‘Frequency Output Set-up’ panel of UNIFORM. The following Table lists recommended volumes for each meter size (and is the default default shipped from the factory). This table is based based upon a full scale velocity of approximately 120 feet per second, depending upon meter size (nominal ID is used), and a maximum at 5,000 Hz.
Nominal Meter Size
3 4 6 8 10 12 16 18 20 24 30 36 42 48
Full Scale (ACFH) 24,000 40,000 90,000 150,000 240,000 360,000 562,500 720,000 900,000 1,200,000 2,000,000 2,812,500 3,600,000 4,000,000
Pulse Factor
Pulse Factor 3 (Pulses/Ft )
(Ft /Pulse)
750 450 200 120 75 50 32 25 20 15 9.0 6.4 5.0 4.5
0.001333 0.002222 0.005000 0.008333 0.013333 0.020000 0.031250 0.040000 0.050000 0.066667 0.111111 0.156250 0.200000 0.222222
3
Table 5 – 1: Q.Sonic full scale ACFH table
Even though the meter may never be operated above 75 ft/sec, the maximum ACFH value chosen for each meter size provides measurement in the event of a line break, or other unexpected high flow rate. If these maximum maximum values values are not suitable for a specific application, or the pipeline size is not listed (pulse factor is also effected), please contact Instromet or see the following equation (on the next page) for determining determining appropriate appropriate values. For configuring the analog output, the same maximum capacity (or different, as needed) can be used. For the configuration of any other parameters please see Section 4.9 of this manual and the UNIFORM User’s Guide.
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Ultrasonic Metering Division
INSTALLATION/START-UP
If the full scale frequency differs from 5000 Hz or a full scale meter capacity other than the one listed in the above table is utilized, the following equation can be used to determine determine the pulse factor (pulses per cubic foot):
Full Scale Frequency • 3600
Pulse Factor ( Pulses / Ft 3 ) =
Meter Capacity ( ACFH )
For applications which require the reciprocal of the pulse factor (cubic foot per pulse), invert the above formula. formula.
5.5 Parame Parameter ter Set-Up Set-Up Protection
A combination of hardware and software is used to ensure the integrity of the flow meter’s programmable parameters. The Series III electronics (2-board) (2-board ) has a rotary switch switch on the PROSON-II board. If the switch is set to position 7, it is possible to re-configure the meter (download a new parameter set-up). In any other position, the electronics will not accept any parameter changes. Normally the the switch should should be left left in position position 0 as the the default default position. If the optional C-module is installed, a hardware jumper (protection jumper) may be installed to prevent re-configur re-configuration ation of the meter. . It should be noted that when the C-module is installed, the rotary switch on the PROSON-II board should be set to position 7. Failure to have this this switch in position position 7 will prevent any configuration downloads even if the protection protection jumper is removed. Unless the rotary switch is in position 7 and the protection jumper is removed (if C-module is installed) the meter’s software will restrict access to the Q.Sonic to ‘read-only ‘read-only operation’. operation’. That is, the set-up set-up may be read from the flow meter, but can not be modified. The dedicated modes of operation that are reserved for factory use and/or maintenance (‘Programming Mode” and ‘High/Low Level Service Mode’) are also disabled. To provide added security once the meter has been properly configured, the protection jumper (if C-module is installed) installed) or the rotary switch may be locked in place with an adhesive seal. Top views of the PROSON-II and CModule PCB, and some details are shown in Figure 5-1. When the rotary switch is in a position other than 7, or the protection jumper is in place, UNIFORM will display a ‘Command Execution Error’ message if a restricted operation is requested, indicating that the software could not perform the operation. The error message will indicate the requested command, and the problem; ‘*******: Access Restricted’. To gain access to the protection jumper, the SPU cover must be removed. Prior to removing the cover, the unit should be powered down. Care must be taken when removing the screws and also when re-installing them to ensure they are not over tightened. Over tightening may cause stripping of the threads.
Page 38
Ultrasonic Metering Division
INSTALLATION/START-UP
Anti-tamper seal (optional)
Rotary switch setting = 0
NOTE: A hole in the top cover plate permits accessibility to rotary switch setting. NOTE: The meter’s parameter set-up can only be changed if rotary switch is set to position 7 The set-up can not be altered in any other switch setting. For consistency switch should be set to “0” to prevent changes to the set-up.
PROSON II PCB and Rotary Switch
J P 2
LCD
REMOTE
J P 4
J P V-MODULE 3
Protection jumper
reserved
J REMOTE P 4 Optional Jumper (See Note) Anti-tamper seal (Optional)
NOTE: This optional jumper may be installed at the factory NOTE: factory.. Its purpose is related to the meter set-up and not protection. CAUTION CAUTION:: If this optional jumper has been installed on the CNOT remove it. Module, DO NOT remove If the protection jumper needs to be removed so that the parameter set-up in the meter can be modified, needle nose pliers may be required to remove/install the jumper.
C-Module PCB and Protection Jumper
Figure 5 – 1: Parameter set-up protection
Page 39
Ultrasonic Metering Division
OPERATION AND MAINTENANCE
6
Operation And Maintenance
6. 6.11 Intr Introd oduc ucti tion on
The SPU contains no control panels to access the Q.Sonic operating system directly. The Q.Sonic operating system can only be accessed by using a PC with the UNIFORM software. Due to the fact that the ultrasonic meter is totally electronic, and does not require routine calibration, or visual/mechanical inspections, the operation of the meter consists primarily of routine monitoring and logging of the operational status readings available through UNIFORM. The Q.Sonic ultrasonic gas flow meter contains no moving parts. The transducers are the only components which are in contact with the gas medium. The materials used for the transducers are resistant to the conditions present when the meter meter is used in applica applications tions for which it is speci specified. fied. Thus, transducers and electronics are virtually maintenance free. This section only provides a cursory overview of the meter data that is to be checked during a routine inspection of the meter. For a more detailed description of the parameters, and potential sources for error, see the Instromet Ultrasonic Ultrasonic Flow Meter Troubleshooting Troubleshooting Manual.
6.2 6.2 Routine Checks
The frequency for collecting the operational Q.Sonic’s status readings will normally be dictated by company policy and the comfort level with respect to the reliability of the meter. Regardless of the frequency (monthly, quarterly, semi-annually) a log file should be collected, and each of the parameters reviewed. In order to get a representative sample of the meter’s operation, the log file should capture at least 1 minute minute of data. The built-in data logger of the UNIFORM software softwar e will perform this task. Refer to UNIFORM User’s Guide for instructions on the use of the data logger.
NOTE: Make sure that the metering conditions are always comparable. It would be misleading if the operating conditions (gas composition, pressure and/or temperature) were significantly different from those during the prior test. Gas composition and gas temperature have the most significant impact on influencing comparison. To consolidate the data collected during one of these routine inspections, it is often helpful to summarize the results. Appendix F has a sample ‘Ultrasonic ‘Ultrason ic Gas Flow Meter Inspection Form which could be utilized or modified to suit the particular application. The following (general) rules apply to the measured data:
♦
Velocity of Sound: The measured VOS should normally be stable within a certain range. Sudden jumps (typically greater than 0.5 ft/sec every second) may indicate a malfunction.
♦
Gas velocity (zero flow measurement): If the measured measured gas velocity does not show a stable low value, this could indicate a certain measuring error.
Page 40
Ultrasonic Metering Division
OPERATION AND MAINTENANCE This inspection can only be made when the pipeline flow is shut off by isolation valves which provide a positive seal (to make sure there is no gas flow). Leakage through through the isolation valve(s) valve(s) will result in erroneous erroneous zero flow readings.
♦
Performance: The performance should normally be close to 100%. A slowly (over a longer period of time) decreasing performance indicates that the transducers may be getting contaminated. The performance will also decrease at high gas flow rates. Depending on the exact version of meter and its dimensions, the performance will generally be above 90%. It will, however, decrease to 50% at very high flow rates. The decrease in performance will not affect measurement measurement accuracy. accuracy. Accuracy will only degrade when the performance approaches zero.
♦
AGC Levels: The AGC Levels should be stable over a long period of time. These readings are are influenced mainly by the pressure. Normally there is no significant difference between transducers A and B, but at higher velocities any difference may may increase. The different path curvature of the upstream and downstream ultrasonic pulses, resulting from higher velocities, causes the AGC to increase (decrease) the amplification amplifica tion for the upstream upstream (downstream) (downstream) transducer. transducer. With forward flow, transducer A is located upstream, and transducer B is located downstream. The AGC levels may also increase as a result of contaminant buildup on the transducer face. If contaminants such as compressor oils mixed mixed with mill scale or other sludge in the pipeline are present, the downstream transducers may be subject to a slight buildup of these contaminants. This will result in a higher AGC level on that transducer, relative to the upstream transducer which is angled with the gas flow. If contaminants are affecting the AGC levels, normally all the downstream transducers will display the increase. Unless the AGC levels are in excess of about 35% of the AGC Limit, the meter’s performance should not be affected.
♦
AGC Limits: The AGC Limits reflect the amount of background ultrasonic and/or electrical noise. These limits should be stable over a long period of time. If there is a decrease in the limit it may be the result of electrical interference induced by an external source. All wiring should be checked and special attention should be paid to the shielding of equipment and cables. Also the grounding schedule is very important. Another cause can can be the units’ power supply. Acoustical noise from control or regulator regulator valves may may also lower the AGC limits. The AGC Limits should exceed the AGC Levels by a factor of 3, or more.
Appendix G provides a ‘rule-of-thumb’ guide which can be used to evaluate some of the results obtained from the meter log and VOS comparison. For a more detailed discussion on possible problems related to the log or VOS comparison, please see the Instromet Ultrasonic Flow Meter Troubleshooting Manual .
Page 41
Page 41 Ultrasonic Metering Division
OPERATION AND MAINTENANCE In addition to capturing a log file, a verification of the VOS can be performed. This verification necessitates a gas analysis, flowing pressure and temperature, all of which are representative of the gas stream flowing at the time the log file is taken. Based on the gas composition, pressure and temperature, software can be used to calculate the theoretical VOS. To obtain software capable of performing speed of sound calculations, please contact Instromet.
Page 42 Ultrasonic Metering Division
TROUBLESHOOTING
7
Troubleshooting
7. 7.11 Intr Introd oduc ucti tion on
This section provides a cursory overview of common problems, which may be encountered, and some quick checks to identify the most common problem source. For a detailed description of the parameters, and potential sources for error, please refer to the Instromet Ultrasonic Flow Meter Troubleshooting Manual.
7. 7.22 Quic Quickk Chec Checks ks
Depending on the problem occurring, a quick check should be performed:
♦ No frequency output, no status status outpu outputs, ts, no current current output: output:
If there is serial data, the output may be damaged. If there is no serial data, data, check the in indicator dicator lights lights in the SPU. If green LED is on and red LED is not flashing, once per second, the communication port may be damaged. If the red LED is not flashing, switch meter off and back on. If the red LED remains off, the SPU electronics mayInstromet be damaged. Ifitional this procedure the problem, please contact contact Instro met for add additional technical technical rectifies aassistance. ssistance. If green LED is not on, check for loss of DC power.
♦ ♦ ♦ ♦
Check cables and connections Check interfaces and barriers at user side Check power supply Check board fuses
If the above checks do not isolate the problem, a more detailed investigation is required.
7.3 Troubl Troublesh eshoot ooting ing
An investigation should be completed if a failure occurs or an error is suspected. The problem may be an occasional error or a total failure of the instrument.. In case of an occasional error, a log file of several minutes’ instrument duration should be made while the error occurs. An analysis can be made on the basis of these data. The Instromet Ultrasonic Flow Meter Troubleshooting Manual provides a detailed discussion on the identification of problems and their potential source. The troubleshooting procedures are continually being updated and are therefore provided as a separate manual. Instromet should be contacted if assistance is required in troubleshooting the meter.
Page 43 Ultrasonic Metering Division
APPENDIX A – FREQUENCY CONTROL CARD
Appendix A Frequency Control Card TECHNICAL I NFORMAT NFORMATION ION – FREQUENCY CONTROL CARD FCC-02, R EV EV.A
SW1 Settings Settings TB2 OUTPUTS SWITCH SETTING
0 1 2 3 4 5 6 7 8 9
1
2
3
4
TB2 (1+ 2-)
TB2 (3+ 4-)
TB2 (5+ 6-)
TB2 ( 7+ 8-)
FF F FF F FF/100 F/100 FF/1000 F/1000 100 Hz 5 kHz
RF F FF F RF/100 F/100 RF/1000 F/1000 100 Hz 5 kHz
FD FD RF F FD FD FD FD Open (off) Open (off)
RD RD RF F RD RD RD RD Open (off) Open (off)
Abbreviations: F – Frequency Frequency (Both Fwd and Rev)
MODE OF OPERATION
Bi-directional mode Uni-directional mode Bi-directional custody (no FD out) Quad output (no FD out) Bi-directional (divide by 100) Uni-directional (divide by 100) Bi-directional (divide by 1000) Uni-directional (divide by 1000) Test Mode (100 Hz) Test Mode (5 kHz)
FF - Forward Flow Frequency RD RD – –R Reverse Flow Direction
RF – RF – Reverse Flow Frequency
FD FD – –F Forward Flow Direction
FCC – 02 COMPONENT INFORMATION INFORMATION INSTROMET, INC. C 2
T B 1
C 1
C 3
+ POWER IN -
C 4
C R 1
I C 1
R N
+ FREQ IN -
R N
6
4
R N
N O
-
T B 2
S W 1
>
2
R N
3
7
S W
+ OUTPUT 2 -
I C
2
+ OUTPUT 3 + OUTPUT 4 -
D2
SW2 Off – Open collector outputs; RN1 not used On – Grounds emitters of all outputs; used in conjunction with RN1 resistor pack to “pull-up” outputs
IN
+ OUTPUT 1 -
R N 1
D1
Fuse 5 x 20 mm T500mA (½ amp slow-blow)
DIR
2
R N
RED = power on AMBE MBER= zer zero o fflo low w GREEN= GREEN= for forwa ward rd flow flow RED = reverse flow
+
C 5
P I 9 C 5 3 1 6 T H C O 7 1 M 1 2 8 / F
LEDs D1 (Power) D2 (N (No o Flo Flow) w) D3 (Dire (Directi ction on))
F 1
D3 GRN-FOR RED-REV
POWER NO FLO DIRECTION FREQUENCY CONTROL CARD
FCC-02, REV. A, 6/99
R e s i s t o r I d e n t i f i c a t i o n N u m b e r
RN1 (Only installed for “pulse” outputs) Recommended resistor values: 860 Ω - 1.0 kΩ @ 5vdc 1.5 kΩ - 2.2 kΩ @ 12vdc 3.3 kΩ - 4.7 kΩ @ 24vdc * The value of the required resistor may vary depending on the size of the flow computer’s internal resistor.
Page 44 Ultrasonic Metering Division
APPENDIX A1 – FCC INPUT/OUTPUT SIGNALS
Appendix A-1 FCC Input/Output Signals CORRELATION GRAPHS – I NPUT SIGNAL SIGNAL VS OUTPUT SIGNAL FOR EACH SW1 MODE SETTING SW1 = 0 (Mode 0) – Bi-Directional
SW1 = 1 (Mode 1) – Uni-Directional
SW1 = 2 (Mode 2) – Custody Transfer
SW1 = 3 (Mode 3) – Quad Output
Page 45 Ultrasonic Metering Division
APPENDIX A1 – FCC INPUT/OUTPUT SIGNALS
Appendix A-1 CORRELATION GRAPHS – CONTINUED SW1 = 4 (Mode 4) – Bi-directional; Bi-directional; Divide by 100; 1.6384 mS Pulse
SW1 = 5 (Mode 5) – Uni-directional; Uni-directional; Divide by 100; 1.6384 mS Pulse
SW1 = 6 (Mode 6) – Bi-directional; Bi-directional; Divide Divide by 1000; 29.4912 mS Pulse
SW1 = 7 (Mode 7) – Uni-directional; Uni-directional; Divide by 1000; 29.4912 mS Pulse
Page 46 Ultrasonic Metering Division
APPENDIX A1 – FCC INPUT/OUTPUT SIGNALS
Appendix A-1 CORRELATION GRAPHS – CONTINUED SW1 = 8 (Mode 8) – 100 Hz Output; OUTPUT 1 and OUTPUT 2 Only (Accuracy ~ ±0.25%)
SW1 = 9 (Mode 9) – 5 kHz Output; OUTPUT 1 and OUTPUT 2 Only (Accuracy ~ ±0.25%)
Page 47 Ultrasonic Metering Division
APPENDIX B – SERIES III, 2 BOARD ELECTRICAL
Appendix B Series III, 2 Board Electrical POWER , SERIAL, DIGITAL A ND A NALOG WIRING SPU E NCLOSURE DOOR – TB1 & TB2 TERMINATION LABEL Ultrasonic Metering Division Instromet, Inc. 12650 Directors Dr., Suite 100, Stafford, TX 77477 Phone: (800) 795-7512 or (281) 491-5252
Fax (281) 491-8440
Instromet Ultrasonic Meter Terminations CAUTION! Live Electrical Circuits! POWER TERMINALS (BLUE) TB1 1. 12~30 VDC (+) Power 2. 12~30 VDC (-) Power 3. 12~30 VDC (+) Power (S (Spare) 4. 12~30 VDC (-) Po Power (Spare) GROUND TERMINALS (YEL/GN) TB1
9. 10. 11. 12. 13. 14.
5. Ground (Meter body) 6. Ground (Meter body) OUTPUT TERMINALS (GRAY) TB2 1. Freq. Freq. Contro Controll Card Card Output Output #1 (+) * 2. Fr Freq eq.. Co Cont ntro roll Card Card Out Outpu putt #1 (-) (-) * 3. Freq. Freq. Contro Controll Card Card Output Output #2 (+) * 4. Fr Freq eq.. Co Cont ntro roll Card Card Out Outpu putt #2 (-) (-) * 5. Freq. Freq. Contro Controll Card Card Output Output #3 (+) * 6. Fr Freq eq.. Co Cont ntro roll Card Card Out Outpu putt #3 (-) (-) * 7. Freq. Freq. Contro Controll Card Card Output Output #4 (+) * 8. Freq. Control Card Output #4 (-) *
15. Opto output #2 (-) Partial Fail ** 16. Opto output #3 (+) Data Valid ** 17. Opto Opto outp output ut #3 (-) (-) Data Data Valid Valid **
Use caution when working on meter to avoid damaging electronics. electronics. Equipment is rated safe only while door is closed.
RS 48 4855 Ser eria iall CO COM Ms (+ (+)) RS 485 Serial COMs (-) RS-232 TX RS-232 GND RS-232 RX Opto Opto outpu outputt #2 (+) Partia Partiall Fail Fail **
OPTO OUTPUTS 2 & 3 (TB2-14 THROUGH 17) **These ** These outputs are programmable. Outputs shown are factory defaults. F.C.C. OUTPUTS 1-4 (TB2-1 THROUGH 8) * Depend on F.C.C. switch setting; refer to F.C.C. documentation for details Contact Instromet for further information on opto outputs and FCC outputs
Dear Customer: This meter was final inspected to insure the highest possible standards for quality prior to shipment. It is our goal to provide you with with the best pos possible sible product, not only in operational performance, but one that arrives at your site with zero defects. If you have any questions, comments or suggestions about the quality of assembly, fit, finish, packaging, or any other issue regarding this product, please contact us at the (800) 795-7512. Thank you for ordering from Instromet, Inc. ASSEMBLED BY:
INSPECTED BY:
Page 48 Ultrasonic Metering Division
APPENDIX B1 – SERIES III, 2 BOARD WIRING DIAGRAM
Appendix B-1 Series III, 2 Board Wiring POWER , SERIAL, DIGITAL AND A NALOG WIRING TB1 & TB2 WIRING SCHEMATICS TB 1 12 – 30 VDC (+) POWER 12 – 30 VDC (- ) POWER
BLUE TERMINALS
1 2
12 – 30 VDC (+) POWER (SPARE)
3
12 – 30 VDC (- ) POWER (SPARE)
4
YELLOW/GREEN TERMINALS
GROUND (METER BODY)
5
GROUND (METER BODY)
6
See Appendix B-4 for explana explanation tion of NOTES
CUSTOMER SUPPLIED 12 – 30 VDC MAX. 7 WATTS (INPUT IS ISOLATED)
NOTE #1 R1 V SUPPLY (+)
) ELECTRONICS ENCLOSURE
FREQUENCY OUTPUT
V SUPPLY (COM)
NOTE #1 R1 V SUPPLY (+)
)
FREQUENCY OUTPUT
V SUPPLY (COM)
NOTE #1 R1 V SUPPLY (+)
TB 2 FREQ. CONTROL CARD OUTPUT #1 (+) FREQ. CONTROL CARD OUTPUT #1 (- )
7 # E T O N
FREQ. CONTROL CARD OUTPUT #2 (+)
3
FREQ. CONTROL CARD OUTPUT #2 (- )
4
FREQ. CONTROL CARD OUTPUT #3 (+)
5
FREQ. CONTROL CARD OUTPUT #3 (- )
6 7
FREQ. CONTROL CARD OUTPUT #4 (+) FREQ. CONTROL CARD OUTPUT #4 (- )
8
RS 485 SERIAL COMS (+)
9
8 # E T O N
RS 485 SERIAL COMS (- )
10
RS-232 TX
11
RS-232 GND
12
RS-232 RX
13 14
OPTO OUTPUT #2 (+) PARTIAL FAIL
)
1 2
FLOW SIGNAL
V SUPPLY (COM)
NOTE #1 R1 V SUPPLY (+)
)
FLOW SIGNAL
V SUPPLY (COM)
SHIELDING
RS485/RS232 CONVERTOR
T(+)
NOTE #4 T(-)
DB25F
NOTE #3 RS232 CABLE MODEM
MODEM
(OPTIONAL)
(OPTIONAL)
NOTE #3
OPTO OUTPUT #2 (- ) PARTIAL FAIL OPTO OUTPUT #3 (+) DATA VALID
15 16
OPTO OUTPUT #3 (- ) DATA VALID
17
POWER PHONE LINE
POWER PHONE LINE
DB9F - SERIAL PORT CONNECTION UNIFORM PROGRAM
SEE APPENDIX C FOR CONVERTER DETAILS AND CABLE CABLE CONNECTOR CONNECTOR PIN OUT DIAGRAMS
UNIFORM PROGRAM
LAPTOP/DESKTOP WORKSTATION
LAPTOP/DESKTOP WORKSTATION
NOTE #1 R1 V SUPPLY (+)
)
ELECTRONICS ENCLOSURE
PARTIAL FAIL TRANSISTOR TRANSISTO R “ON” WITH PARTIAL FAIL
V SUPPLY (COM) NOTE #1 R1
V SUPPLY (+)
)
DATA VALID “ON” WITH TRANSISTOR VALID DATA
V SUPPLY (COM)
Page 49 Ultrasonic Metering Division
APPENDIX B2 – SERIES III, 3 BOARD ELECTRICAL
Appendix B-2 Series III, 3 Board Electrical POWER , SERIAL, DIGITAL A ND A NALOG WIRING SPU E NCLOSURE DOOR – TB1 & TB2 TERMINATION LABEL Ultrasonic Metering Division 12650 Directors Dr., Suite 100, St Stafford, afford, TX 77477 Phone: (800) 795-7512 or (281) 491-5252 Fax (281) 491-8440
Instromet, Inc. -
Instromet Ultrasonic Meter Terminations CAUTION! Live Electrical Circuits! POWER TERMINALS (BLUE) TB1 1. 12~30 VDC (+) Power Input 2. 12~30 VDC (-) Po P ower Input 3. 12~30 VDC (+) Power (Spare) 4. 12~30 VDC (-) Power (Spare) GROUND TERMINALS (YEL/GN) TB1 Ground (Meter body) Ground (Meter body) ANALOG TERMINALS (BLUE) TB1 5. Analog (4-20 mA) Output (+) 6. Analog (4-20 mA) Output (-) * 7. Pressure (4-20 mA) Input (+) 8. Pressure (4-20 mA) Input (-) * 9. Temperature (4-20 mA) Input (+) 10. Temperature (4-20 mA) mA) Input (-) * * NOTE NOTE:: TB1-6, 8, & 10 are internally connected (non-isolated).
TB 2 TERMINALS 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 10. 11. 12. 12.
Freq. Control Card Output #1 (+) * Freq. Control Card Output #1 (-) * Freq. Control Card Output #2 (+) * Freq. Control Card Output #2 (-) * Freq Freq.. Co Cont ntro roll Ca Card rd Out Outpu putt #3 (+ (+)) * Freq. Control Card Output #3 (-) * Freq. Control Card Output #4 (+) * Freq. Control Card Output #4 (-) * RS 485 Serial COMs (+) RS 485 485 Ser Seria iall C COM OMss (-) (-) Data Valid Output (+) Data Data Vali Valid d Out Outpu putt (-) (-)
F.C.C. OUTPUTS 1-4 (TB2-1 THROUGH 8) * Depend on F.C.C. switch setting; refer to F.C.C. documentation for details
Use caution when working on meter to avoid
Contact Instromet for further
damaging electronic Equipment is rated safe electronics. only whiles.door is closed.
information on outputs opto outputs and FCC
Dear Customer: This meter was final inspected to insure the highest possible standards for quality prior to shipment. It is our goal to provide you with with the best possible possible product, not only in operational performance, but one that that arrives at your site with with zero defects. If you have any questions, comments or suggestions about the quality of assembly, fit, finish, packaging, or any other issue regarding this product, please contact us at the (800) 795-7512. Thank you for ordering from Instromet, Inc. ASSEMBLED BY:
INSPECTED BY:
Page 50 Ultrasonic Metering Division
APPENDIX B3 – SERIES III, 3 BOARD WIRING DIAGRAM
Appendix B-3 Series III, 3 Board Wiring POWER , SERIAL, DIGITAL AND A NALOG WIRING TB1 & TB2 WIRING SCHEMATICS See Appendix B-4 for explanation of NOTES
TB1
1 2
12 – 30 VDC (+) POWER INPUT 12 – 30 VDC (- ) POWER INPUT
BLUE TERMINALS
12 – 30 VDC (+) POWER (SPARE)
3
12 – 30 VDC (- ) POWER (SPARE)
4
YELLOW/GREEN TERMINALS
BLUE TERMINALS
CUSTOMER SUPPLIED 12 – 30 VDC MAX. 7 WATTS (INPUT IS ISOLATED)
GROUND (METER BODY)
ANALOG OUTPUT
GROUND (METER BODY)
ANALOG (4-20 mA) OUTPUT (+)
5
ANALOG (4-20 mA) OUTPUT (- )
6
PRESSURE (4-20 mA) INPUT (+)
7
PRESSURE (4-20 mA) INPUT (- )
8
TEMPERATURE (4-20 mA) INPUT (+)
9
TEMPERATURE (4-20 mA) INPUT (- )
10
-
R LOAD + MAX. 400 OHM
P -
LOAD ≤ 250 OHM
+ V 4 2
LOAD ≤ 250 OHM
+
TRANSDUCER SUPPLY
T -
+
NOTES #2, #5 & #6
NOTE #1 R1 V SUPPLY (+)
ELECTRONICS ENCLOSURE
)
FREQUENCY OUTPUT
V SUPPLY (COM)
NOTE #1 R1 V SUPPLY (+)
)
FREQUENCY OUTPUT
V SUPPLY (COM)
NOTE #1 R1 V SUPPLY (+)
TB 2 FREQ. CONTROL CARD OUTPUT #1 (+)
NOTE #1
FREQ. CONTROL CARD OUTPUT #2 (+)
3
R1
FREQ. CONTROL CARD OUTPUT #2 (- )
4
FREQ. CONTROL CARD OUTPUT #3 (+)
5
FREQ. CONTROL CARD OUTPUT #1 (- )
7 # E T O N
)
1 2
FLOW SIGNAL
V SUPPLY (COM) V SUPPLY (+)
)
FLOW SIGNAL
FREQ. CONTROL CARD OUTPUT #3 (- ) FREQ. CONTROL CARD OUTPUT #4 (+) FREQ. CONTROL CARD OUTPUT #4 (- )
8 # E T O N
RS 485 SERIAL COMS (+)
6 7
V SUPPLY (COM)
8 9
RS 485 SERIAL COMS (- )
10
DATA VALID OUTPUT (+)
11
DATA VALID OUTPUT (- )
12
SHIELDING
T(+)
NOTE #4
RS485/RS232 CONVERTOR
T(-)
NOTE #3 RS232 CABLE MODEM
NOTE #1
(OPTIONAL )
R1 V SUPPLY (+)
ELECTRONICS ENCLOSURE
DB25F
)
NOTE #3
DATA VALID TRANSISTOR “ON” WITH VALID DATA
V SUPPLY (COM)
POWER PHONE LINE DB9F - SERIAL PORT CONNECTION
SEE APPENDIX C FOR CONVERTER DETAILS AND CABLE CONNECTOR PIN OUT DIAGRAMS
UNIFORM PROGRAM
LAPTOP/DESKTOP WORKSTATION
Page 51 Ultrasonic Metering Division
APPENDIX B4 – NOTES ON ELECTRICAL
Appendix B-4 Notes on Electrical POWER , SERIAL, DIGITAL AND A NALOG WIRING DIAGRAM NOTES R ELATED ELATED TO TB1 & TB2 WIRING SCHEMATICS 1.
OPEN COLLECTOR COLLECTOR OPTOCOUPLER OPTOCOUPLER OUTPUTS OUTPUTS:: FREQUENCY, FLOW SIGNAL (FREQUENCY OR DIRECTION DIRECTION), ), PARTIAL FAILURE AND DATA VALID OUTPUTS MUST BE LIMITED TO A MAXIMUM CURRENT OF 60 mA WITH A MINIMUM OF 5 mA AND MAXIMUM MAXIMUM VOLTAGE OF 50 VDC. R1 = V SUPPLY SUPPLY * 100 (ie. 2400 OHMS @ 24 VDC).
2.
P & T INPUTS ARE ONLY REQUIRED IF ONE OR MORE OUTPUTS WILL BE SCALED FOR CORRECTED FLOW (SCFH). IF OUTPUTS ARE SCALED BASED ON VELOCITY (FT/SEC) (FT/SEC) OR UNCORRECTED FLOW (ACFH), P & T MAY BE OMITTED.
3.
TELEBYTE CONVERTER: SET DTE/DCE SWITCH ON CONVERTE CONVERTER R TO “DCE” WHEN CONNECTED TO A PC; SET TO “DTE” WHEN CONNECTED CONNECTED TO A MODEM. DIP SWITCH SETTINGS: SETTINGS: 1 & 4 = CLOSED, CLOSED, 2, 3 & 5 = OPEN. SEE APPENDIX C. C.
4.
RS485 WIRES MUST BE TWISTED AND SHIELDED.
5.
PRESSURE AND TEMPERATURE TRANSMITTERS TRANSMITTERS AND DC SOURCE(S) ARE NOT SUPPLIED BY INSTROMET.
6.
THE COMMON (-) FOR THE PRESSURE AND TEMPERATURE INPUTS AND ANALOG OUTPUT ARE NOT ISOLATED FROM EACH OTHER.
7.
THE OUTPUTS FROM TERMINALS 1 THROUGH 8 WILL BE PREDICATED BY THE SWITCH (SW1) SETTING ON THE FREQUENCY CONTROL CARD (FCC-02, REV.A). SEE APPENDIX A. A. UNLESS SPECIFIED OTHERWISE BY THE USER, THE FACTORY DEFAULT SETTING FOR T HE SWITCH IS “0”. IF FREQ. CONTROL CARD OUTPUT #3 (TERMINALS 5 & 6) ARE SET FOR FLOW DIRECTION OUTPUT, THEN THE TRANSISTOR WILL BE “ON” WITH FORWARD FLOW IF FREQ. CONTROL CARD OUTPUT #4 (TERMINALS 7 & 8) ARE SET FOR FLOW DIRECTION OUTPUT, THEN THE TRANSISTOR WILL BE “ON” WITH REVERSE FLOW
8.
IF THE SPU IS A 2-BOARD SERIES III, THE UTILIZATION OF EITHER THE RS 485 OR RS 232 SERIAL OUTPUTS IS AT THE DISCRETION OF THE USER. FOR MOST INSTALLATIONS, THE SIMPLE 3-WIRE RS 232 SIGNAL WILL MEET ALL USER REQUIREMENTS. REQUIREMENTS. IF THE DISTANCE BETWEEN BETWEEN THE METER AND THE END END DEVICE IS EXCEEDINGLY LONG, OR ONLY SHIELDED 1-PAIR WIRE IS AVAILABLE, THE RS 485 SIGNAL SHOULD BE USED. USING THE RS 485 OUTPUT WILL NECESSITATE THE INSTALLATION OF AN RS 485 TO RS 232 CONVERTER. SEE APPENDIX C FOR C FOR CONVERTER DETAILS AND CABLE CONNECTOR PIN OUT DIAGRAMS.
Page 52 Ultrasonic Metering Division
APPENDIX C – SERIAL DEVICE SET-UP AND CABLE PIN OUT
Appendix C Converter Cable Pin Outs SERIAL DEVICE SET-UP AND CABLE PIN OUT G TO COMPUTER’S SERIAL PORT
R+ R-
SEE DETAIL A BELOW FOR DB25TO DB9 CABLE PIN OUT
TT+
T+ TO TB 2 - 9 T- TO TB 2 - 10
TELEBYTE DTE
TD
DCE
RD
TO ULTRASONIC METER SPU
CONVERTER
5 4
ROCKER SWITCH SETTINGS
N E P O
3 2 1
INPUT 120 VAC OUTPUT 9 VAC
NOTE; THIS UNIT IS REQUIRED TO RUN THE UNIFORM SO NOTE; SOFTWARE FTWARE FROM THE RS 485 SERIAL OU OUTPUT TPUT
DETAIL A
13
12
25
Pin Out Diagram: RS 232 Signal Cable from RS 485/232 Converter
11
24
10
23
9
22
8
21
7
20
6
19
5
18
DB25 - F
DETAIL B
4
17
3
16
2
15
1
14
DB25
DB9 - Female
2
2
3
3
7
5
2
RS 232 GND 12
3
13
4
9
5
5
4
9
8
1
2
3
7
3
8
2
7
1
6
DB9 - F
Pin Out Diagram: RS 232 Signal Cable from SPU
RS 232 TX 11
RS 232 RX
5
6
DB9 - F
Page 53 Ultrasonic Metering Division
APPENDIX D – TYPICAL Q.SONIC ELECTRONICS CONFIGURATION
Appendix D Parameter Set-up TYPICAL Q.SONIC® Series III ELECTRONICS CONFIGURATION (PAGE 1 OF 2) ************************************* * Ultrasonic Flow Meter * * Measured Data Log * * (UNIFORM 1.41b2.0) * * --------------------------------- * * Instromet Ultrasonic Technologies * ************************************* UNIFORM Settings: ================ InstrumentType: 24 > 'Q.Sonic-5 Series-III QL Meter (s/a SPU)' COM settings: UNIFORM point-to-point 4800,N,8,1
Parameter Set-up: ================ PROSON-II Configuration: Instrument Type: 24 > 'Q.Sonic-5 Series-III QL Meter (s/a SPU)' Parameter Parameter 1: 0x8002 Parameter Parameter 2: 0xA0 Parameter Parameter 3: 0x0064 Parameter Parameter 4: 0x07 Parameter Parameter 5: 0x225D Module Information: Serial Number: 1270 SW Version: V5.02 Id String: 901-42-05F017 Spool Piece Parameter P arameters: s: Diameter: 11.374 in. L1: Path Length: 26.319 in. Beam Angle: 60.08 degrees L2: Path Length: 34.134 in. Beam Angle: 60.00 degrees L3: Path Length: 26.323 in. Beam Angle: 59.96 degrees L4: Path Length: 34.055 in. Beam Angle: 60.12 degrees L5: Path Length: 26.335 in. Beam Angle: 59.95 degrees V-Module Paramete P arameters: rs: Application-specif Application-specific ic Param Parameters: eters: V.o.S. Range: Lower Limit: 1000.00 ft/s Upper Limit: 1600.00 ft/s
Page 54 Ultrasonic Metering Division
APPENDIX D – TYPICAL Q.SONIC ELECTRONICS CONFIGURATION
Appendix D TYPICAL Q.SONIC® SERIES III ELECTRONICS CONFIGURATION (PAGE 2 OF 2) Gas Velocity Range: Lower Limit: -129.99 ft/s Upper Limit: 129.99 ft/s Device-specific Parameters: Sample Rate: 15 Hz Timing Constant: 710 Timing Constant 2: 0 Timing Constant 3: 0 Pulse Length: 62 Profile Correction Parameters: Density: 2.934 lb/cu.ft Dynamic Viscosity: 1.30e-002 cp. Profile Correction Coefficients: Coefficients: Axial Path(s): p1: 2940.0000 p2: 12.0000 p3: 0.7500 p4: 1.0000 p5: 0.2500 p6: Swirl Paths: p1: p2: p3: p4: p5: p6:
-0.8745 2407.0000 65.0000 1.0037 0.9966 0.0097 -3.1670
Calibration Parameters: Coefficients: c1 c2 S=1: 0.1604 0.8503 S=2: 0.0300 0.0200 S=3: 0.0500 0.0060 S=4: 0.0300 0.0000 S=5: 0.0000 1.0071 S=6: 1.0060 0.0000
c3 c4 0.0300 0.0000 0.0500 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Forward Adjust Factor:
0.9990
Reverse Adjust Factor:
1.0000
Low Pass Filter: Off Low Flow Cut-off: Off Frequency Output: Vol.Flow (Line Cond.) Vol.Flow (L (Line ine Cond.) Range: Lower Limit: 0.0 CFH Upper Upper Limit: 360000.0 CFH Frequency Range: Lower Limit: 0.0 Hz Upper Limit: 5000.0 Hz Error Frequency: 6000.0 Hz Meter Factor: 50.0000 impulses/CF
Page 55 Ultrasonic Metering Division
APPENDIX E – MODBUS R EGISTER EGISTER LISTING
Appendix E Modbus Register Listing The Modbus register address format for the Instromet meter is: nxxx Where: n = any intege integerr less than 10 (i.e. 0, 0, 1, 2, 3 … ...9) ...9) xxx = a number between 000 and 999 with data typ types es grouped as follows:
Short word registers Register n000 n001 n0 02 02 n0 03 03 n004 n005 n006 n007 n008 n009 n010 n011 n012 n013 n014 n015 n016 n017 n018 n019 n0 20 20
Measured value Instrument type Num ber of paths Me as as ur uremen men t i nt nt er er va va l S e eq qu en enc e n um, um, 'L 'Lo ow Or Ord de r'r' Me as as ur ure me men t i nt nt er er va va l S e eq q ue ue nc nc e num, 'Hi 'Hig h Or Ord der ' Sample Rate Valid samples L1 Valid samples L2 Valid samples L3 Valid samples L4 Valid samples L5 AGC Level Transducer 1A AGC Level Transducer 1B AGC Level Transducer 2A AGC Level Transducer 2B AGC Level Transducer 3A AGC Level Transducer 3B AGC Level Transducer 4A AGC Level Transducer 4B AGC Level Transducer 5A AGC Level Transducer 5B A GC GC L Liimit mit T Trr a an ns du ducer 1A 1A
Register n021 n022 n0 23 23 n0 24 24 n025 n026 n027 n028 n029 n030 n031 n032 n033 n034 n035 n036 n037 n038 n039 n040 -n199
Measured value AGC Lim it Transducer 1B AGC Limit Transducer 2A AG GC C L imi imitt Tra Trans du duc er er 2 B AG GC CL Liimi mitt Tra Tran sd sduc er er 3 3A A AGC Limit Transducer 3B AGC Limit Transducer 4A AGC Limit Transducer 4B AGC Limit Transducer 5A AGC Limit Transducer 5B Diagnostic Bits L1 Diagnostic Bits L2 Diagnostic Bits L3 Diagnostic Bits L4 Diagnostic Bits L5 Operating Status of V-Module Operating Status of C-Module Reserved for firmware ROM checksum Reserved for parameter set-up checksum Mode of operation Undefined (returns 0)
Long word registers Re Regis giste terr n2 n200 00 n201 n201 n202 n202 n203 n204 n205-n39 n205 -n399 9
Meas Measur ured ed va value lue Meas Measur ureme ement nt iint nter erva vall se sequ quen ence ce num numbe ber r Res Reserv erved ed:: Accu Accumul mulate ated d actual actual volu volume me forewa foreward rd (8 digit digit coun counter ter)) Res Reserv erved ed:: Accu Accumul mulate ated d actua actuall volume volume reve reverse rse (8 (8 digit digit count counter) er) Reserved Reserved:: Ac Accumul cumulated ated actual actual e error rror volu volume me fo forewa reward rd (8 digit digit counte counter) r) Reserved Reserved:: Ac Accumul cumulated ated actual actual er error ror volume volume re revers verse e ((8 8 digit digit counter) counter) Undefined Undefined (retu (returns rns 0)
Floating point registers Register n400 n401 n402 n403 n404 n4 05 05 n406 n407 n408 n409 n410
Measured value Average speed of sound Average gas velocity Absolute pressure Absolute temperature Flow rate at line conditions Fl Flo ow ra att e a t bas e c on ond iitt iio ons Speed of sound L1 Speed of sound L2 Speed o off s so ound L3 L3 Speed of sound L4 Speed of sound L5
Register n411 n412 n413 n414 n415 n4 16 16 n417 n418 n419 n420 n421-n599
Measured value Gas velocity L1 Gas velocity L2 Gas velocity L3 Gas velocity L4 Gas velocity L5 Re Res s er erv ed ed: A cc cc umu umull a att e ed d ac act ua ual vo vol ume ume f or ore wa ward ((7 7 di di gi gi t co un unt er er ) Reserved: Accumulated actual volum e reverse (7 digit counter) Reserved: Accumulated actual error volume foreward (7 digit counter) Reserved: A Ac ccumulated actual er error vo volume re reverse (7 di digit c co ounter) Reserved Undefined (returns 0)
Page 56 Ultrasonic Metering Division
APPENDIX F – ULTRASONIC GAS FLOW METER INSPECTION FORM
Appendix F Example Inspection Form ULTRASONIC GAS FLOW METER I NSPECTION FORM Q.SONIC GAS FLOW METER CHECK FORM
Metering station / location Meter tag number / run / stream Meter serial number Date Time Operating (gas) pressure Operating (gas) temperature Gas composition (date / time / reference to document / stating analysis results) Gas flow rate (measured value) Gas flow rate (reference value, eventually zero) Speed of sound (observed by ultrasonic gas flow meter) Speed of sound (theoretical calculated value) PERFORMANCE
Path 1
Path 2
Path 3
Path 4
Path 5
AGC-level
1A
1B
2A
2B
3A
3B
4A
4B
5A
5B
2A
2B
3A
3B
4A
4B
5A
5B
AGC-limit
1A
1B
Log file name / identification
Technician Name_________________________________
Page 57 Ultrasonic Metering Division
APPENDIX G – GENERAL OPERATIONAL GUIDELINES
Appendix G Basic Parameter Criteria Operating Parameter Sample Rate
Normal 15 ± 1
Possible Problem 90% @ zero flow >70% flowing
Cons Co nsis iste tent ntly ly
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