GE DigitalFlow GS868 Service Manual Download

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Chapter 4. Parts Replacement

DigitalFlow™ GS868 Service Manual

RED

BLACK

Display Cable

LCD Display

Backlight Cable

Keypad Cable

J2 Connector

PC Board Ground Wire

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)

EPROM (U4)

Beveled

Corner

Front View

Rear View

G N/L2 L1 AC

G – + DC

Figur

e 9: Standar

Model

GS868

- Print

cuit Boar

Assembly

Summary of Contents for DigitalFlow GS868

Page 1: ...GE Measurement Control Flow 910 190S Rev E February 2015 DigitalFlow GS868 Panametrics Steam Ultrasonic Mass Flowmeter Service Manual...

Page 2: ......

Page 3: ...com 2015 General Electric Company All rights reserved Technical content subject to change without notice DigitalFlow GS868 Panametrics Steam Ultrasonic Mass Flowmeter Service Manual 910 190S Rev E Feb...

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

Page 5: ...tion which can result in minor or moderate injury to personnel or damage to the equipment if it is not avoided HIGH VOLTAGE This symbol indicates the presence of high voltage It calls your attention t...

Page 6: ...ment WEEE take back initiative directive 2012 19 EU The equipment that you bought has required the extraction and use of natural resources for its production It may contain hazardous substances that c...

Page 7: ...ssing the Calibration Menu 7 1 5 2 aLOW Option F1 7 1 5 3 aHIGH Option F2 7 1 5 4 4 mA Option F3 7 1 5 5 20 mA Option F4 8 1 6 Calibrating the RTD Inputs 9 1 6 1 Accessing the Calibration Menu 9 1 6 2...

Page 8: ...16 E14 Totals Overflow 21 2 17 E15 Equation Limit 21 2 18 Screen Messages 22 Chapter 3 Diagnostics 3 1 Introduction 25 3 2 Displaying Diagnostic Parameters 25 3 3 Diagnostic Record 28 3 4 Flowcell Pro...

Page 9: ...Rack Mount Enclosure 45 B 3 Rack Mount Fuse Replacement 46 B 4 Rack Mount Option Card Installation 47 B 5 Rack Mount EPROM Replacement 48 B 6 Rack Mount LCD Display Replacement 49 B 7 Rack Mount Prin...

Page 10: ...Contents viii DigitalFlow GS868 Service Manual...

Page 11: ...number from 0 6 See Chapter 1 Installation of the Startup Guide for a complete description of the available option cards and the procedures for wiring them 1 2 Menu Map The Calibration Menu is access...

Page 12: ...ale values for each output must be calibrated After calibrating the outputs which have a resolution of 5 0 A 0 03 full scale their linearity should be tested Note The zero point of the analog output m...

Page 13: ...Service Manual 3 Chapter 1 Calibration 1 3 Calibrating the Analog Outputs cont Figure 2 Ammeter Connection for Slots 1 6 Output A Terminal Block Option Card A SIG A RTN B SIG B RTN D SIG D RTN C SIG...

Page 14: ...y for assistance 1 4 2 Calibrating the High End of the Output Range 1 Press F2 to calibrate the high end of the output range 2 Press F1 or F2 to adjust the ammeter reading UP or DOWN until a 20 mA rea...

Page 15: ...calibration of the analog output Do one of the following To calibrate or test another output press F4 EXIT and return to Step 3 in Accessing the Calibration Menu on page 4 To calibrate test additiona...

Page 16: ...n the Slot 0 analog output will supply the low reference high reference 4 mA and 20 mA signals at the appropriate times Note If a Slot 0 analog output will be used to calibrate the analog inputs make...

Page 17: ...OW proceed to aLOW Option below If you selected F2 aHIGH proceed to aHIGH Option below If you selected F3 4 mA proceed to 4 mA Option below If you selected F4 20 mA proceed to 20 mA Option on page 8 1...

Page 18: ...F2 to cancel the entry In either case the ANALOG INPUT prompt reappears 3 Go to Procedure Options below Procedure Options You have completed calibration of the analog output Do one of the following T...

Page 19: ...both options 1 6 2 Probe Option F1 3 Press F1 to select Input A or F2 to select Input B 1 6 2a Set Point Temperature 4 Press F1 to enter the set point temperature 5 Enter the desired set point temper...

Page 20: ...ng Manual Printing RTD Data to obtain point values at your set point and slope point 1 Press F1 to select Input A or F2 to select Input B 1 6 3a Set Number 2 Press F1 to enter the set number formerly...

Page 21: ...nal block as shown in Figure 4 below Refer to the menu map in Figure 6 on page 15 as a guide Figure 4 Typical Ohmmeter Connections For this discussion assume that the option card has been installed in...

Page 22: ...in numbers on the option card terminal block 4 Pressing F1 CLOSE should yield an ohmmeter reading of about zero Pressing F2 OPEN should yield an infinite ohmmeter reading 5 Press F3 to EXIT 6 Repeat t...

Page 23: ...re 6 on page 15 as a guide Figure 5 Frequency Counter Connections For this discussion assume that the option card has been installed in Slot x 1 8 1 Accessing the Calibration Menu 1 Press the CAL key...

Page 24: ...specified frequency 6 Repeat Steps 3 4 and 5 to test all four of the frequency totalizer outputs If any of the outputs fails to pass the test contact the factory for assistance Procedure Options You h...

Page 25: ...ORE F2 ABORT HIGH REF CALIBRATING F1 F2 A B F1 F2 Set Slop F1 F2 Probe Numer F1 F2 SetPt Slope RTD Inputs Set Numer F1 F2 STORE ABORT Set Point Slope Point Set Point Slope Number Temp F1 F3 A C Alarms...

Page 26: ...Chapter 1 Calibration DigitalFlow GS868 Service Manual 16...

Page 27: ...ting process All of the possible Model GS868 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...

Page 28: ...entered into the SETUP SIGNL submenu in Chapter 1 Programming Site Data of the Programming Manual 2 4 E2 Sound Speed Error Problem The sound speed exceeds the limits programmed in the SETUP SIGNL sub...

Page 29: ...d particulates may be present in the flowcell Action Refer to Chapter 3 Diagnostics to correct any flowcell problems 2 8 E6 Cycle Skip Accel Problem The acceleration exceeds the limits programmed in t...

Page 30: ...ates that based on the temperature and pressure readings the steam is super saturated and may become two phase Cause Low temperature in the system Action Raise the system temperature or lower the syst...

Page 31: ...E15 Equation Limit Problem The meter cannot determine if the steam measurement is within 1 accuracy Cause The temperature or pressure reading is outside the accuracy specification of the GS868 steam e...

Page 32: ...FAIL The non volatile RAM has failed Contact the factory NVR OK The non volatile RAM has passed Measurement Mode Messages All Logs Cleared hit key This message may appear during one of the following t...

Page 33: ...o clear the message and the GS868 will default to the last valid calibration The message will also appear if there is no ammeter connected to the analog output during calibration Overflow The display...

Page 34: ...Chapter 2 Error Codes and Screen Messages 24 DigitalFlow GS868 Service Manual no content intended for this page...

Page 35: ...of flowcell transducer and or electrical problems The Diagnostics Menu may only be entered from the Big or Dual measurement mode display See Chapter 2 Displaying Data in the Programming Manual for ins...

Page 36: ...gth for the downstream transducer 50 75 50 or 75 SNDSP Soundspeed Ft s Displays the measured sound speed of the fluid N A N A Tup UP Transit S usec Displays the upstream transit time of the ultrasonic...

Page 37: ...isplays Measure Tdn N A N A DT M DeltaT M usec Displays Measure Delta N A N A Vinst Vinst Ft s Displays the instantaneous velocity for comparison with Vel without averaging N A N A Tsat T Saturat deg...

Page 38: ...e 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 measureme...

Page 39: ...or a thorough discussion of this topic 3 4 3 Transducer Problems Ultrasonic transducers are rugged reliable devices However they are subject to physical damage from mishandling and chemical attack The...

Page 40: ...Chapter 3 Diagnostics 30 DigitalFlow GS868 Service Manual no content intended for this page...

Page 41: ...e such as a switch or circuit breaker The disconnect device must be marked as such clearly visible directly accessible and located within 1 8 m 6 ft of the Model GS868 An aluminum shroud with a wiring...

Page 42: ...he fuse holder 4 Replace the defective fuse with a new one of the same rating and type Use only 1 1 4 x 1 4 Slo Blo fuses having a rating as indicated in Table 4 below and on the wiring diagram label...

Page 43: ...remove the two screws or standoffs along the bottom edge of the printed circuit board Note For an LVD compliant meter with the clear plastic shroud over the electrical connectors there will be standof...

Page 44: ...corner of the board 3 Using a chip puller remove the EPROM from its socket If a chip puller is unavailable a straightened paper clip may be used in the notches at the upper right and lower left corner...

Page 45: ...stic snap rivets or metal hardware in some older meters In either case they may be discarded as new plastic snap rivets will be provided 3 There are six 32 pin option card sockets J41 J46 on the rear...

Page 46: ...nting studs 4 Place the new LCD display assembly over the mounting studs on the console cover and fasten it in place with the four standoffs Make sure that the LCD display assembly is oriented as show...

Page 47: ...etween the printed circuit board and the standoff beneath it install the remaining short standoff on the left side of the printed circuit board Securely tighten all eight standoffs and or screws IMPOR...

Page 48: ...ow rate measurements Note Be sure to enter a complete and detailed account of any parts replacement performed on the Model GS868 in Appendix A Service Record 4 7 Spare Parts All of the necessary compo...

Page 49: ...isplay Cable Keypad Cable Backlight Cable Mounting Screw 8 places Main Shroud Option Cards Fuse Holder Cap Card Guide Metal Bracket Main Shroud Option Card Socket Metal Bracket Fasteners Option Card S...

Page 50: ...Connector PC Board Ground Wire Screws or Standoffs Short Standoff 3 places Vertical Components Long Standoff 3 places Metal Bracket Option Card Connectors Fasteners typ Display Connector J52 Keypad C...

Page 51: ...ter the 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...

Page 52: ...Appendix A Service Record 42 DigitalFlow GS868 Service Manual Table 6 Service Record cont Date Description of Service Performed By...

Page 53: ...the values for the diagnostic parameters should be entered in Table 7 below Table 7 Diagnostic Parameters Parameter Initial Current Parameter Initial Current SS up Mw SS do z SNDSP AcVOL Tup StVOL Tdo...

Page 54: ...Appendix A Service Record 44 DigitalFlow GS868 Service Manual no content intended for this page...

Page 55: ...t unit Note For compliance with the European Union s Low Voltage Directive this unit requires an external power disconnect device such as a switch or circuit breaker The disconnect device must be mark...

Page 56: ...the defective fuse with a new one of the same rating and type Use only 5 x 20 mm Slo Blo fuses having a rating as indicated in Table 8 below and on the rear panel label 4 Reinstall the black plastic...

Page 57: ...new option card 4 To install the option card insert its 32 pin connector into the chosen option card socket and gently press the card into place Make sure that the pins in the connector are straight a...

Page 58: ...p a little at a time at each notch until it comes free 3 Make sure that the beveled corner on the new EPROM is aligned with the beveled corner of the socket and place the EPROM into the socket 4 By ap...

Page 59: ...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 toward the l...

Page 60: ...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 circuit board DO...

Page 61: ...nd TRANSDUCER connectors onto the printed circuit board at the locations indicated in Figure 11 on page 54 Make sure the marked pin 1 sides of the connectors face the right side keypad side of the enc...

Page 62: ...Appendix B Optional Enclosures 52 DigitalFlow GS868 Service Manual no content intended for this page...

Page 63: ...E D 8 F TOTL FREQ RS232 USE ONLY WITH A 250V FUSE BEFORE SERVICING DISCONNECT POWER 100 120 VAC FUSE 1 AMP OFF ON 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...

Page 64: ...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 O...

Page 65: ...uit Board Contamination Gas 28 Corrosion Transducers 29 D Diagnostic Parameters Initial Values 28 Table 26 Table of Values 43 Diagnostics Menu Entering 25 Exiting 28 Display Cable 33 LCD 36 Replacing...

Page 66: ...Return Policy 57 S Screen Messages Table 22 Service Record 41 Shroud Aluminum 31 37 LCD Display 36 LVD 38 Plastic 38 Signal Quality Error E4 19 Sockets Option Card 35 Soundspeed Error E2 18 Gas 28 Sp...

Page 67: ...lar purpose and warranties arising from course of dealing or usage or trade Return Policy If a GE Sensing instrument malfunctions within the warranty period the following procedure must be completed 1...

Page 68: ...Warranty 58 DigitalFlow GS868 Service Manual no content intended for this page...

Page 69: ...entries must be sealed using a suitably certified threaded plug Modifications to any flameproof enclosure are not permitted The apparatus must be de energized before opening servicing and conducting...

Page 70: ...unted for process temperatures up to 85 C and will be remotely mounted for process temperatures exceeding 85 C Markings Markings appear on the instrument label which identifies the product model seria...

Page 71: ...1326 2 3 2006 EN 61010 1 2012 Overvoltage Category II Other standards Used EN 50014 1997 A1 A2 EN 50018 2000 A1 following the provisions of the 2004 108 EC EMC 2006 95 EC Low Voltage and 94 9 EC ATEX...

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Page 74: ...ertified Company www ge mcs com en about_us quality html Customer Support Centers U S A The Boston Center 1100 Technology Park Drive Billerica MA 01821 U S A Tel 800 833 9438 toll free 978 437 1000 E...

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