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Copyright 2022 Baker Hughes company.
This material contains one or more registered trademarks of Baker Hughes Company and its subsidiaries 

in one or more countries. All third-party product and company names are trademarks of their respective 

holders.

DigitalFlow™ GC868

Panametrics Gas Clamp-On Ultrasonic Flowmeter

Service Manual (1 and 2-Channel)

910-226S1F1

April 2022

Summary of Contents for DigitalFlow GC868

Page 1: ...panametrics com 910 226SF1 April 2022 DigitalFlow GC868 Panametrics Gas Clamp On Ultrasonic Flowmeter Service Manual 1 and 2 Channel...

Page 2: ......

Page 3: ...stered trademarks of Baker Hughes Company and its subsidiaries in one or more countries All third party product and company names are trademarks of their respective holders DigitalFlow GC868 Panametri...

Page 4: ...ii no content intended for this page...

Page 5: ...particular purpose and warranties arising from course of dealing or usage or trade Return Policy If a Panametrics instrument malfunctions within the warranty period the following procedure must be co...

Page 6: ...Warranty iv DigitalFlow GC868 Service Manual 1 and 2 Channel no content intended for this page...

Page 7: ...1 7 1 5 2 2 Slope Point Temperature 1 7 1 5 3 Numer Option F2 1 7 1 5 3 1 Set Number 1 7 1 5 3 2 Slope Number 1 7 1 5 3 3 Procedure Options 1 7 1 6 Testing the Alarm Relays 1 8 1 6 1 Accessing the Ca...

Page 8: ...he EPROM 4 3 4 5 Installing an Option Card 4 4 4 6 Replacing the LCD Display 4 4 4 7 Installing the Printed Circuit Board 4 5 4 8 Spare Parts 4 7 Appendix A Service Record A 1 Introduction A 1 A 2 Dat...

Page 9: ...d 2 Channel Chapter 1 Calibration Introduction 1 1 Menu Map 1 1 Calibrating the Analog Outputs 1 1 Calibrating the Analog Inputs 1 4 Calibrating the RTD Inputs 1 6 Testing the Alarm Relays 1 8 Testing...

Page 10: ...page 1 12 as a guide in following the calibration instructions Note The same instructions apply to both the 1 Channel and 2 Channel versions of the Model GC868 flowmeter The following discussion assum...

Page 11: ...er 1 Calibration Figure 1 1 Ammeter Connection Output A Figure 1 2 Ammeter Connection for Slots 1 6 Output A Terminal Block I O Slot 0 B RTN B SIG A RTN A SIG 4 1 Ammeter Terminal Block Option Card A...

Page 12: ...f the output range 2 Press F1 or F2 to adjust the ammeter reading UP or DOWN until a 20 mA reading is achieved If you press F3 Numer enter a numeric value for the calibration point and press ENT Note...

Page 13: ...analog inputs which are designated as A and B Each of the inputs which may be either a 0 4 20 mA input or an RTD input must be calibrated at both the zero point and full scale values After calibrating...

Page 14: ...procedure for calibrating Input A is identical to that for calibrating Input B However when calibrating Input B be sure a calibrated current source is connected to the appropriate pins on the termina...

Page 15: ...d to Procedure Options below 1 4 5 1 Procedure Options You have completed calibration of the analog output Do one of the following To calibrate another input return to Step 3 in Accessing the Calibrat...

Page 16: ...irst collect data using the RTDs option in the PRINT menu discussed in Chapter 5 of the Programming Manual The RTDs option allows you to know what point value the GC868 is reading at a given temperatu...

Page 17: ...assume that the option card has been installed in Slot x 1 6 1 Accessing the Calibration Menu 1 Press the CAL key to enter the Calibration Program 2 Press Fx to calibrate the desired slot The option...

Page 18: ...proceed to the appropriate section To leave the Calibration Menu press F4 EXIT twice 1 7 Testing the Totalizer Freque ncy Outputs Totalizer frequency outputs may be added to the Model GC868 by install...

Page 19: ...rify that the frequency counter reads the correct value 1 7 3 Entering Pulse Number 5 Enter the number of pulses desired between 1 and 10 000 and press the ENT key That number of pulses will then be o...

Page 20: ...Chapter 1 Calibration 1 11 DigitalFlow GC868 Service Manual 1 and 2 Channel no content intended for this page...

Page 21: ...NG F3 F4 TEST EXIT F1 F2 4 mA 20 mA F3 F4 Numer STORE F1 F2 A B Slot x Outputs ANALOG OUTPUT F1 F2 UP DOWN F1 ABORT Analog Outputs Full Scale Numeric CALIBRATING F3 F4 C D F4 F1 20 mA EXIT F1 F3 aLOW...

Page 22: ...Chapter 1 Calibration DigitalFlow GC868 Service Manual 1 and 2 Channel 1 13 no content intended for this page...

Page 23: ...2 2 E2 Sound Speed Error 2 2 E3 Velocity Range 2 2 E4 Signal Quality 2 2 E5 Amplitude Error 2 2 E6 Cycle Skip Accel 2 3 E7 Analog Out Error 2 3 E8 Temp In 2 3 E9 Press In 2 3 E10 Special Input 2 3 E1...

Page 24: ...ll of the possible Model GC868 error code messages are discussed in this chapter along with the possible causes and the recommended actions When an error code is generated it will appear on the active...

Page 25: ...s to correct any flowcell and or transducer problems 2 5 E3 Velocity Range Problem The velocity exceeds the limits programmed in the SETUP submenu of the User Program Cause This error may be caused by...

Page 26: ...input error Cause The pressure exceeds the specified limits for the analog inputs option card Action Check the pressure transmitter and the connecting cable Refer to Chapter 1 Calibration and recalibr...

Page 27: ...Up Messages Backup Battery FAIL The backup battery that powers the non volatile RAM has failed Contact the factory Backup Battery OK The backup battery that powers the non volatile RAM has passed EPRO...

Page 28: ...menu this message indicates that the calibration of the analog output is invalid Hit any key to clear the message and the GC868 will default to the last valid calibration The message will also appear...

Page 29: ...DigitalFlow GC868 Service Manual 1 and 2 Channel Chapter 3 Diagnostics Introduction 3 1 Displaying Diagnostic Parameters 3 1 Diagnostic Record 3 4 Flowcell Problems 3 4 Transducer Problems 3 5...

Page 30: ...rom the Big or Dual measurement mode display See Chapter 2 Displaying Data in the Programming Manual for instructions on setting the display screen to the desired format and enter the Diagnostics Menu...

Page 31: ...between upstream and downstream transit times N A 30 nsec REYN Reynolds Displays the Reynolds number 100 000 00 0 N A Tot K K Re MultiK KFactor Displays the combination of all K factors N A N A PEAK P...

Page 32: ...t usec Displays dynamically calculated signal timing offset in the skan signal measurement N A N A Vinst Vinst Ft s Displays the instantaneous velocity for comparison with Vel without averaging N A N...

Page 33: ...p Guide to correct any installation problems If the physical installation of the system meets the recommended specifications it is possible that the gas itself may be preventing accurate flow rate mea...

Page 34: ...low 1 LEAKS Leaks may occur around the transducer Repair such leaks immediately If the leaking gas is corrosive carefully check the transducer and cables for damage after the leak has been repaired 2...

Page 35: ...l Chapter 4 Parts Replacement Introduction 4 1 Fuse Replacement 4 1 Removing the Printed Circuit Board 4 2 Replacing the EPROM 4 3 Installing an Option Card 4 4 Replacing the LCD Display 4 4 Installin...

Page 36: ...rical components and serves as a location for the wiring diagram label All of the procedures discussed in this chapter except for fuse replacement require removal of this shroud Note For compliance wi...

Page 37: ...main power and resume taking measurements Note Be sure to record the fuse replacement in Appendix A Service Record 4 3 Removing the Printed Circuit Board All of the remaining maintenance procedures di...

Page 38: ...ted as component U4 is located in the top left corner of the bottom of the printed circuit board See Figure 4 2 on page 4 9 for a rear view of the printed circuit board EPROM replacement may be requir...

Page 39: ...n the connector are straight and properly aligned with the socket and that the connector is positioned on the right side of the option card 4 Repeat step 3 to install any additional option cards 5 Pla...

Page 40: ...g steps 1 Position the printed circuit board within the electronics console with the top edge tilted forward Insert the display ribbon cable and keypad ribbon cable connectors into their sockets on th...

Page 41: ...TB1 on the printed circuit board Plug all other electrical connectors into the appropriate sockets on the printed circuit board and option cards See Chapter 1 Installation of the Startup Guide for in...

Page 42: ...e serial number of the Model GC868 at the time of purchase Table 4 2 Spare Parts List Part Number Description 703 1127 02 Option Card Alarms Hermetically Sealed 703 1127 03 Option Card Alarms General...

Page 43: ...lder Cap Card Guide Metal Bracket Main Shroud Option Card Socket Metal Bracket Fasteners Option Card Standoffs typ LVD Shroud Screw 8 places PC Board Standoffs LCD Display Display Shroud Nuts Washers...

Page 44: ...able J2 Connector Screws or Standoffs Short Standoff 3 places Vertical Components Long Standoff 3 places Metal Bracket Option Card Connectors Fasteners typ Display Connector J52 Keypad Connector J50 E...

Page 45: ...DigitalFlow GC868 Service Manual 1 and 2 Channel Appendix A Service Record Appendix A Service Record Introduction A 1 Data Entry A 1 Diagnostic Parameters 3...

Page 46: ...e details of the service should be recorded in this appendix An accurate service history of the meter can prove very helpful in troubleshooting any future problems A 2 Data Entry Record complete and d...

Page 47: ...DigitalFlow GC868 Service Manual 1 and 2 Channel A 2 Appendix A Service Record Table A 1 Service Record Date Description of Service Performed By...

Page 48: ...ction is noticed the values for the diagnostic parameters should be entered in Table A 2 below Table A 2 Diagnostic Parameters Parameter Initial Current Parameter Initial Current SS up Mw SS do AcVOL...

Page 49: ...al Enclosures Appendix B Optional Enclosures Introduction 1 Rack Mount Enclosure 1 Rack Mount Fuse Replacement 1 Rack Mount Option Card Installation 2 Rack Mount EPROM Replacement 3 Rack Mount LCD Dis...

Page 50: ...nd Figure B 2 on page B 9 for the location of the relevant components while completing the following procedures If the top panel of the meter is accessible service may be performed without removing th...

Page 51: ...remove the four fasteners that secure the metal bracket to the printed circuit board Lift the metal bracket straight up and away from the printed circuit board Note The fasteners may be either plastic...

Page 52: ...p or to upgrade to a newer software version To replace the EPROM refer to Figure B 2 on page B 9 and complete the following steps 1 After disconnecting the main power to the meter remove the top panel...

Page 53: ...the new LCD display assembly over the mounting studs on the front panel and fasten it in place with the four standoffs Make sure that the LCD display assembly is oriented with the cables pointing towa...

Page 54: ...connectors from the printed circuit board Use a marker to identify pin 1 on the right side keypad side of these connectors Note These connectors should be pulled straight up and off the printed circui...

Page 55: ...OG OUT and TRANSDUCER connectors onto the printed cir cuit board at the locations indicated in Figure B 2 on page B 9 Make sure the marked pin 1 sides of the connectors face the right side keypad side...

Page 56: ...Appendix B Optional Enclosures B 7 DigitalFlow GC868 Service Manual 1 and 2 Channel no content intended for this page...

Page 57: ...ow GC868 Service Manual 1 and 2 Channel B 8 GC868 19 00 483 18 25 464 2 25 57 5 22 133 11 37 289 11 82 300 13 13 333 4 19 106 15 70 399 3 31 84 14 83 377 16 99 432 Fuse Figure B 1 Model GC868 Rack Mou...

Page 58: ...g Output Connector CH1 Transducer Connector CH2 Transducer Connector EPROM U4 PCB Mounting Screw typ Printed Circuit Board Option Card Bracket Option Card Socket typ RS232 Connector Ground Lead Green...

Page 59: ...creen Error Message 2 1 Illustration 2 1 E EPROM Replacing 4 3 User Program 4 3 Error Codes 2 2 Error Message Display Screen 2 1 Expansion Slots 1 1 F Flowcell Problems Gas 3 4 Pipe 3 5 Fuse Holder 4...

Page 60: ...4 4 Soundspeed Error E2 2 2 Gas 3 4 Spare Parts List 4 7 Special Input Error E10 2 3 T Temperature Input Error E8 2 3 Totalizer Frequency Option Card Testing 1 9 Totals Overflow Error E14 2 3 Transdu...

Page 61: ...lamp On Ultrasonic Flowmeter to which this declaration relates are in conformity with the following standards EN 61326 1998 Class A Annex A Continuous Unmonitored Operation EN 61010 1 1993 A2 1995 Ove...

Page 62: ...Ultrasonic Flowmeter r latif cette d claration sont en conformit avec les documents suivants EN 61326 1998 Class A Annex A Continuous Unmonitored Operation EN 61010 1 1993 A2 1995 Overvoltage Categor...

Page 63: ...da die Produkte GC868 Gas Clamp On Ultrasonic Flowmeter folgende Normen erf llen EN 61326 1998 Class A Annex A Continuous Unmonitored Operation EN 61010 1 1993 A2 1995 Overvoltage Category II Pollutio...

Page 64: ...one or more countries All third party product and company names are trademarks of their respective holders 910 226SF1 Customer Support Centers U S A 1100 Technology Park Drive Billerica MA 01821 4111...

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