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DigitalFlow™ GM868 - GE Measurement & Control

1. 18 70 899 3 31 84 AMG Of GM868 18 25 464 19 00 483 Figure B 1 Model GM868 Rack Mount Enclosure Dimensions ref dwg 712 1076 Optional Enclosures March 2008 a Line Lead Black Option Card Slot Cover Option Card Socket Neutral Lead White typ Analog Output Connector Fuge RS232 Connector CH1 Transducer Connector CH2 Transducer Connector Ground Lead Green Top Panel Mounting Hole Power Terminal Block 4 places Printed Circuit Board Display Cable Red Lead Snap Rivets typ Option Card Bracket Beveled Corner EY S PCB Mounting Screw typ Black Lead EPROM U4 Figure B 2 Model GM868 Rack Mount Console Assembly ref dwg 705 849 Backlight Cable Nut amp Washers typ Keypad Cable LCD Display Display Shroud Standoff typ Optional Enclosures B 11 March 2008 Index A E Acceleration Error E6 2 3 EPROM Alarms Option Card Testing 1 11 Repl cing cx rg dE heureuse 4 4 Amplitude Error ES 2 3 User Program 4 4 Analog Inputs Option Card Calibrating 1 6 Error Codes 2 2 2 3 2 4 Analog Output Error E7 2 3 Error Message Display Screen 2 1 Analog Outputs Slot 0 Expansion Slots 1 1 As Calibrated Current Source
2. Too high a signal strength may be caused by the failure of an electronic component Too low a signal strength may be caused by a flowcell or electrical problem Check for sources of electrical interference and verify the integrity of the electronics console by temporarily substituting a test flowcell that is known to be good Check the transducers and relocate them if necessary See Chapter 3 Diagnostics for instructions The signal amplitude exceeds the limits programmed in the SETUP submenu of the User Program Excessive levels of an attenuating gas such as CO are present in the flowcell Solid or liquid particulates may be present in the flowcell Refer to Chapter 3 Diagnostics to correct any flowcell problems The acceleration exceeds the limits programmed in the SETUP submenu of the User Program This condition is usually caused by poor flow conditions or improper transducer spacing Refer to Chapter 3 Diagnostics to correct any flowcell and or transducer problems The current in the analog output circuit exceeds the limits for the analog output port The output load exceeds the specified limits for the analog output port Make sure the output load is 550 ohms for the Slot 0 analog outputs or is 1000 ohms for an analog outputs option card slots 1 6 This message indicates a temperature input error The temperature exceeds the specified limits for the analog inputs option card Check the temp
3. Fi F2 F3 F4 Fi F2 F3 soto stoti store stots sLora stots store Slot x Option Card Slot 0 Outputs Slot x Inputs Analog Inputs Slot x Outputs FA F1 F2 F1 L AJ 8 1 ANALOG OUTPUT ANALOG INPUT Fi F2 F3 F4 Fi F2 F3 F4 F1 F1 F3 4mA 20mA TEST ExT aLOW aHIGH 4mA mA EXIT cLose OPEN EXIT Full Scale LOW REFERENCE HIGH REFERENCE CALIBRATING LOW REF HIGH REF CALIBRATING F2 F3 F4 F1 F1 F2 F1 F2 WN Numer STORE ABORT store Asor STORE BORT Numeric J Slot x Outputs Freq Total Fi F2 a 5 RTD Inputs FREQUENCY FA F2 Probe Numer Slot x Outputs Analog Outputs F1 F2 F3 F4 Le Le oJ Figure 1 6 Calibration Menu Map PULSES Slot x Inputs ANALOG OUTPUT F1 F2 F3 F4 Ca 4mA 20mA Test ExT Numer Full Scale CALIBRATING Fi F2 Fi F2 F2 F3 F4 Fi Se Slope sew stb set J J LE Down Numer STORE ABORT Set Point Slope Number Tem Numeric P Set Point Slope Point Fi F2 SaR NOTE Plain text repr
4. Shannon Industrial Estate Shannon County Clare Ireland erkl ren in alleiniger Verantwortung da die Produkte DF868 Liquid Ultrasonic Flowmeter GF868 Flare Gas Ultrasonic Flowmeter GM868 Multi Purpose Gas Ultrasonic Flowmeter GN868 Natural Gas Ultrasonic Flowmeter GS868 Steam Mass Ultrasonic Flowmeter folgende Normen erf llen e EN 61326 1998 Class A Annex A Continuous Unmonitored Operation e EN 61010 1 1993 A2 1995 Overvoltage Category II Pollution Degree 2 gem den Europ ischen Richtlinien Niederspannungsrichtlinie Nr 73 23 EG und EMV Richtlinie Nr 89 336 EG Die oben aufgef hrten Ger te und zugeh rige mitgelieferte Schallwandler Messrohre werden in einer separaten Konformit tserkl rung behandelt tragen keine CE Kennzeichnung gem der Druckger te Richtlinie da sie in bereinstimmung mit Artikel 3 Absatz 3 gute Ingenieurpraxis der Druckger te Richtlinie 97 23 EG f r DN lt 25 geliefert werden Shannon June 1 2002 p LAS Mr James Gibson GENERALDIREKTOR CE e LS EN 1809002 T V ESSEN Shannon ISO 9001 U S CERT DOC H4 August 2004 USA 1100 Technology Park Drive Billerica MA 01821 4111 Web www gesensing com Ireland Sensing House Shannon Free Zone East Shannon Co Clare Ireland
5. see Figure 4 2 on page 4 11 Severe or repeated bending of these components will break their leads 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 the rear of the printed circuit board See Figure 4 1 on page 4 10 and Figure 4 2 on page 4 11 to identify the cables and sockets Note that the keypad cable connects to the upper socket and the display cable connects to the lower socket IMPORTANT The ribbon cables must be installed with the edges that were marked during removal oriented toward the top of the printed circuit board 2 Carefully position the printed circuit board up against the eight standoffs in the enclosure Do not damage the transformers and any installed option cards as they are maneuvered between the standoffs 3 Loosely install the three long standoffs on the right side of the printed circuit board and the two standoffs or screws along the bottom edge of the printed circuit board Then install only the top and bottom short standoffs on the left side of the printed circuit board 4 Insert the free end of the green grounding strap between the printed circuit board and the middle standoff beneath the left side of the board Making sure to capture the grounding strap lug between the printed circuit board and the standoff beneath it install the remaining short standoff on the
6. D To test the outputs connect a frequency counter to the card s terminal block as shown in Figure 1 5 below Refer to the menu map in Figure 1 6 on page 1 15 as a guide Terminal Block Option Card IN Frequency Counter COM Figure 1 5 Frequency Counter Connections For this discussion assume that the option card has been installed in Slot x Accessing the Calibration 1 Press the CAL key to enter the Calibration Program Menu 2 Press Fx to calibrate the desired slot The option bar will include a slot listing for each installed option card 3 Press F1 F4 to select output A B C or D respectively Entering Frequency 4 Enter a new frequency in the range of 1 10 000 Hz and press the ENT key Verify that the frequency counter reads the correct value Calibration 1 13 March 2008 Entering Pulse Number 5 Enter a new frequency in the range of 1 10 000 Hz and press the ENT key Verify that the frequency counter reads the correct value 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 have completed testing the totalizer frequency outputs Do one of the following To calibrate test additional slots press F4 EXIT and proceed to the appropriate section To leave the Calibration Menu press F4 EXIT twice 1 14 Calibration March 2008
7. S CERT DOC H4 August 2004 DECLARATION Sensing DE CONFORMITE Nous Panametrics Limited Shannon Industrial Estate Shannon County Clare Ireland d clarons sous notre propre responsabilit que les DF868 Liquid Ultrasonic Flowmeter GF868 Flare Gas Ultrasonic Flowmeter GM868 Multi Purpose Gas Ultrasonic Flowmeter GN868 Natural Gas Ultrasonic Flowmeter GS868 Steam Mass Ultrasonic Flowmeter r latif cette d claration sont en conformit avec les documents suivants EN 61326 1998 Class A Annex A Continuous Unmonitored Operation e EN 61010 1 1993 A2 1995 Overvoltage Category II Pollution Degree 2 suivant les r gles de la Directive de Compatibilit Electromagn tique 89 336 EEC et de la Directive Basse Tension 73 23 EEC Les mat riels list s ci dessus ainsi que les transducteurs pouvant tre livr s avec les manchettes faisant l objet d une d claration de conformit s par e ne portent pas le marquage CE de la directive des quipements sous pression car ils sont fournis en accord avec la directive 97 23 EC des quipements sous pression pour les DN 25 Article 3 section 3 qui concerne les pratiques et les codes de bonne fabrication pour l ing nierie du son Shannon June 1 2002 pe P ER Mr James Gibson DIRECTEUR G N RAL CE e LS EN IS0 9002 Shannon T V ESSEN ISO 9001 U S CERT DOC H4 August 2004 Sensing KONFORMIT TS ERKL RUNG Wir Panametrics Limited
8. and fasten it in place with the four standoffs Make sure that the LCD display assembly is oriented as shown in Figure 4 2 on page 4 11 Caution Do not overtighten the standoffs or the display assembly may be damaged 5 Position the LCD display cables between the two right side mounting studs and install the display shroud over the mounting studs The top and bottom edges of the shroud are bent at a 90 angle to the main surface and these edges must face inwards toward the display assembly Note One edge of the display shroud is covered with a piece of black electrical tape This side of the shroud should be on the right to protect the cables against abrasion 6 Fasten the display shroud to the console cover with the four sets of nuts washers Caution Do not overtighten the nuts or damage to the mounting threads may occur Complete the LCD Display replacement by proceeding to the Installing the Printed Circuit Board section of this chapter 4 6 Parts Replacement March 2008 Installing the Printed Circuit Board Whether the printed circuit board was removed for replacement or for one of the other procedures discussed in this chapter reinstallation of the printed circuit board is the final step in the process Refer to Figure 4 1 on page 4 10 and complete the following steps Caution During this procedure be very careful not to damage the vertical components along the top edge of the printed circuit board
9. designated as Slot 0 Note Convention in this manual identifies any expansion slot as Slot x where x is a 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 The Calibration Menu is accessed by pressing the CAL key on the keypad Use this menu to calibrate and test the Slot 0 analog outputs as well as to calibrate and test any option cards that are installed in the expansion slots Refer to the menu map in Figure 1 6 on page 1 15 as a guide in following the calibration instructions Note The instructions on the next page apply to both the I Channel and 2 Channel versions of the Model GM868 flowmeter The following discussion assumes that the left screen pane is active If the right screen pane is active only the function key designations change That is replace F1 F4 with F5 F8 Proceed to the appropriate sections of this chapter to calibrate and test all of the installed inputs and or outputs Note While in the Calibration Menu if there is no keypad activity for two minutes the Model GM868 will automatically reboot and return to measurement mode Calibration 1 1 March 2008 Calibrating the Analog Outputs Every Model GM868 flowmeter includes two built in analog outputs A and B at terminal block I O which is designated as Slot 0 Additional analog outputs may be added to the Model GM868 by ins
10. locations indicated in Figure B 2 on page B 11 Make sure the marked pin 1 sides of the connectors face the right side keypad side of the enclosure Note fany leads have come loose from the screw terminals on these connectors refer to Appendix C Optional Enclosures of the Startup Guide for wiring instructions 6 Reconnect the main POWER LEADS to the screw terminals at the rear of the printed circuit board When properly installed the lead colors should be green white and black from left to right as viewed from the front of the enclosure 7 Reinstall all option cards as described earlier in this chapter Insert all external option card connectors at the rear panel of the meter 8 After checking for any loose hardware that may have fallen into the enclosure reinstall the top panel on the meter and secure the panel in place with the four screws previously removed The Model GM868 flowmeter may now be placed back into service Reconnect the main power and refer to Chapter 2 Initial Setup of the Startup Guide and Chapter 1 Calibration of this Service Manual for instructions on properly setting up the meter for accurate flow rate measurements Note Be sure to record the printed circuit board replacement in Appendix A Service Record Optional Enclosures B 9 March 2008 I 14 83 877 16 99 432 4 19 106
11. lt 19 or gt 29 AMPdn DN Amp Discrim Displays the value for the amplitude discriminator of downstream transducer lt 19 or gt 29 CNTup UP DAC Counts Displays the AGC DAC count for upstream gain setting N A CNTdn DN DAC Counts Displays the AGC DAC count for downstream gain setting N A P up UP Peak Displays signal peaks for the upstream transducer 100 or 22300 3 2 Diagnostics March 2008 Table 3 1 Available Diagnostic Parameters Continued Option Bar Screen Display Description DN Peak Displays signal peaks for the downstream transducer Temperature deg Displays the gas temperature F 4 20 mA input Pressure psia Displays the gas pressure 4 20 mA input Molecular Wt Displays the average molecular weight of the gas Act Vol KACF MIN Displays actual volumetric flow Std Vol KSCF MIN Displays standard volumetric flow if STANDARD equation is used UP Transit S usec Displays Skan Tup DN Transit S usec Displays Skan Tdn DeltaT Susec Displays Skan DELTA UP Transit M usec Displays Measure Tup DN Transit M usec Displays Measure Tdn DeltaT M usec Displays Measure Delta Skan T Offset Displays dynamically calculated signal usec timing offset in skan signal measurement Vinst Ft s Displays the instantaneous velocity for comparison with Vel without averaging
12. output be sure to reconnect the ammeter to the appropriate pins on terminal block I O See Figure 1 1 on page l 2 or Figure 1 2 above for the correct pin numbers Calibrating the Low End 1 Press F1 to calibrate the low end of the output range of the Output Range 2 Press F1 or F2 to adjust the ammeter reading UP or DOWN until a 4 mA reading is achieved If you press F5 Numer enter a numeric value for the calibration point and press ENT 3 Press F4 to STORE the setting or press and F1 to ABORT the calibration Note fthe ammeter reading cannot be adjusted within 5 0 uA of the 4 mA setting contact the factory for assistance Calibration 1 3 March 2008 Calibrating the High End 1 Press F2 to calibrate the high end of the output range of 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 fthe ammeter reading cannot be adjusted within 5 0 yA of the 20 mA setting contact the factory for assistance 3 Press F4 to STORE the setting or press gt and F1 to ABORT the calibration Note Skip the next section if the linearity test will not be performed at this time Proceed to Procedure Options on the next page Testing the Analog Output Note If you exited this menu and are returning follow steps I Linearity through 3 in Accessing t
13. power disconnect device 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 GM868 Rack Mount Enclosure Refer to Figure B 1 on page B 10 and Figure B 2 on page B 11 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 the meter from the rack Otherwise disconnect all rear panel electrical connections and remove the meter from the rack before proceeding IMPORTANT Keep a detailed record of all service procedures in Appendix A Service Record This record may prove very helpful in diagnosing any future problems Optional Enclosures B 1 March 2008 Rack Mount Fuse Replacement If it has been determined that the fuse in the Model GM868 requires replacement refer to Figure B 1 on page B 10 and Figure B 2 on page B 11 and complete the following steps 1 On the rear panel of the meter set the power switch to the OFF position and pull the power cord out of its receptacle IWARNING The main power to the Model GM868 must be disconnected before proceeding 2 Locate the black plastic fuse cover on the back panel at the bottom of the power cord receptacle and pull it straight out 3 Replace the defective fuse with a new one of the same rating and type Use only 5 x 20 mm Slo Blo fuses having a
14. programmed into the Model GM868 will result in erratic or inaccurate flow rate readings Refer to Chapter 2 Initial Setup of the Startup Guide and make sure that the appropriate sound speed is programmed into the meter 3 4 Diagnostics March 2008 Pipe Problems Pipe related problems may result either from a failure to observe the installation instructions as described in the Startup Guide or from improper programming of the meter By far the most common pipe problems are the following 1 The collection of material at the transducer location s Accumulated debris at the transducer location s will interfere with transmission of the ultrasound signals As a result accurate flow rate measurements are not possible Realignment of the flowcell or transducers often cures such problems and in some cases transducers that protrude into the flow stream may be used Refer to Chapter 1 Installation of the Startup Guide for more details on proper installation practices 2 Inaccurate pipe measurements The accuracy of the flow rate measurements is no better than the accuracy of the programmed pipe dimensions For a flowcell supplied by GE the correct data will be included in the documentation For other flowcells measure the pipe wall thickness and diameter with the same accuracy desired in the flow rate readings Also check the pipe for dents eccentricity weld deformity straightness and other factors that may cause inaccu
15. set forth herein are exclusive and are in lieu of all other warranties whether statutory express or implied including warranties of merchantability and fitness for a particular purpose and warranties arising from course of dealing or usage or trade If a GE Sensing Inc instrument malfunctions within the warranty period the following procedure must be completed 1 Notify GE giving full details of the problem and provide the model number and serial number of the instrument If the nature of the problem indicates the need for factory service GE will issue a RETURN AUTHORIZATION number RA and shipping instructions for the return of the instrument to a service center will be provided 2 If GE instructs you to send your instrument to a service center it must be shipped prepaid to the authorized repair station indicated in the shipping instructions 3 Upon receipt GE will evaluate the instrument to determine the cause of the malfunction Then one of the following courses of action will then be taken fthe damage is covered under the terms of the warranty the instrument will be repaired at no cost to the owner and returned f GE determines that the damage is not covered under the terms of the warranty or if the warranty has expired an estimate for the cost of the repairs at standard rates will be provided Upon receipt of the owner s approval to proceed the instrument will be repaired and returned lii Marc
16. value in the SETUP SIGNL submenu of the User Program Using the procedures in Chapter 3 Diagnostics check the components listed above Also check the value programmed into the SETUP SIGNL submenu as described in the Operator s Manual The sound speed exceeds the limits programmed in the SETUP SIGNL submenu of the User Program The error may be caused by incorrect programming poor flow conditions or poor transducer spacing Compare the measured sound speed to tabulated nominal values for the fluid being used and correct any programming errors Refer to Chapter 3 Diagnostics to correct any flowcell and or transducer problems The velocity exceeds the limits programmed in the SETUP submenu of the User Program This error may be caused by the entry of improper programming data or by poor flow conditions and or excessive turbulence Make sure the actual flow rate is within the programmed limits See the Programming Manual for details Refer to Chapter 3 Diagnostics to correct any flowcell and or transducer problems Error Codes and Screen Messages March 2008 E4 Signal Quality E5 Amplitude Error E6 Cycle Skip Accel E7 Analog Out Error E8 Temp In Problem Cause Action Problem Cause Action Problem Cause Action Problem Cause Action Problem Cause Action The signal quality is outside the limits programmed in the SETUP submenu of the User Program
17. 1 6 CAE Od ee a 1 2 F Linearity Sing eR Ae Saeed Mea a ae aed 1 2 Flowcell Problems Resolution 1 2 CRE Te nt neta 3 4 Analog Outputs Option Card Pipe oad ida eh 3 5 Calibrating leZ Busk EE ee Pe o a ET 4 2 Resolution 1 2 Rang 42 Replacing icon see 4 2 B SIZE ida 4 2 Bracket Option Card 4 5 PDG 250 RE ET eh wine 05 4 2 C G Cable Gas Backlight 4 3 4 8 Contamination 3 4 Display von ern 4 3 4 6 Physical Requirements 3 4 Keypad A tete tt 4 3 Problems e mer 3 4 Calibrating Soundspeed 3 4 See Parameter Name Grounding Strap 4 7 Calibration Menu Entering 1 1 Guides Option Card 4 5 Circuit Board See Printed Circuit Board K Contamination Gas al 3 4 Keypad Cable 4 3 Corrosion Transducers 3 6 D i LCD Display i i era he 4 6 Diagnostic Parameters Table 3 2 Leaks Transducers 3 6 Diagnostics Menu Low Signal Error El 2 2 Enter wl p A INSU AE D as 3 1 LVD Statement 4 1 EXI A A GS 3 3 Display N Cable eoim aba 4 3 A E E EE 4 6 No Error EQ 2 2 Replacing 4 6 Numer Option Display Screen for RTD Opti
18. All of the procedures discussed in this chapter except for fuse replacement require removal of this shroud Note For compliance with the European Union s Low Voltage Directive 73 23 EEC a transparent plastic shroud protects the electrical connections The shroud must remain in place except while wiring the unit Reinstall the shroud after the wiring has been completed Use the foldout drawings at the end of this chapter to locate the relevant components while completing the following procedures IMPORTANT Keep a detailed record all service procedures performed on the Model GM868 in Appendix A Service Record This service history may prove very helpful in diagnosing any future problems Parts Replacement 4 1 March 2008 Fuse Replacement If it has been determined that the fuse in the Model GM868 requires replacement complete the following steps IWARNING The main power to the Model GM868 must be disconnected before proceeding Open the cover on the electronics console For LVD compliant units remove the two mounting screws and lift the clear plastic shroud out of the electronics console Locate the black plastic fuse holder that is mounted on the printed circuit board between the power terminal block TB1 and the RS232 terminal block As shown in Figure 4 1 on page 4 10 the fuse holder extends below the main aluminum shroud and the fuse holder cap is located on the bottom of the fuse holder Us
19. GE Sensing amp Inspection Technologies DigitalFlow GM868 Panametrics Multipurpose Ultrasonic Gas Flowmeter Service Manual 1 and 2 Channel GE Sensing amp Inspection Technologies DigitalFlow GM868 Panametrics Multipurpose Ultrasonic Gas Flowmeter F1 F MILICIA me Si tists B IT CNS lt Service Manual 1 and 2 Channel 910 193SE1 March 2008 The DigitalFlow GM868 is a GE Panametrics product GE Panametrics has joined other GE high technology businesses under a new name GE Sensing amp Inspection Technologies March 2008 Warranty Return Policy Each instrument manufactured by GE Sensing Inc is warranted to be free from defects in material and workmanship Liability under this warranty is limited to restoring the instrument to normal operation or replacing the instrument at the sole discretion of GE Fuses and batteries are specifically excluded from any liability This warranty is effective from the date of delivery to the original purchaser If GE determines that the equipment was defective the warranty period is one year for general electronic failures of the instrument one year for mechanical failures of the sensor If GE determines that the equipment was damaged by misuse improper installation the use of unauthorized replacement parts or operating conditions outside the guidelines specified by GE the repairs are not covered under this warranty The warranties
20. Last parameter Leave the Diagnostics Menu These options are available only in the Skan Measure mode Diagnostic Record Upon leaving the Diagnostic Menu via the EXIT key or the EXIT option on the option bar the display screen will continue to show the last diagnostic parameter that was selected To return to normal measurement mode select a channel to display for a 2 Channel meter only and then select the desired display parameter See Chapter 3 Operation of the Startup Guide for detailed instructions The values for the diagnostic parameters immediately after initial installation of the meter and verification of proper operation should be entered in Table A 1 on page A 1 These values can then be compared to future values to help diagnose any future malfunction of the system Diagnostics 3 3 March 2008 Flowcell Problems Gas Problems If preliminary troubleshooting with the Error Code Messages and or the Diagnostic Menu indicates a possible flowcell problem proceed with this section Flowcell problems fall into two categories gas problems pipe problems Read the following sections carefully to determine if the problem is indeed related to the flowcell If the instructions in this section fail to resolve the problem contact the factory for assistance Most gas related problems result from a failure to observe the flowmeter system installation instructions as described in the Startup Guide R
21. Record Continued A 2 Service Record Appendix B Optional Enclosures Introduction ar sense ane ne liner B 1 Rack Mount Enclosure au nun ee B 1 Rack Mount Fuse Replacement B 2 Rack Mount Option Card Installation B 3 Rack Mount EPROM Replacement B 5 Rack Mount LCD Display Replacement B 6 Rack Mount Printed Circuit Board Replacement B 7 March 2008 Introduction The Model GM868 is available in optional enclosure types each of which has been designed to permit easy on site upgrades and parts replacement See the foldout drawings at the end of this appendix for details of the applicable GM868 electronics console assembly The instructions in this appendix along with a few common tools are all that is required to perform the following tasks fuse replacement option card installation EPROM replacement LCD display replacement printed circuit board PCB replacement IMPORTANT For meters supplied in the standard Type 4X enclosure see Chapter 4 Parts Replacement for instructions specific to that unit IWARNING Prior to performing any maintenance procedures disconnect the main power from the unit Note For compliance with the European Union s Low Voltage Directive 73 23 EEC this unit requires an external
22. XX Record the EPROM sum at the initial power up and periodically thereafter FRIGID INIT Executed The NVR non volatile RAM was automatically initialized due to a memory fault Contact the factory NVR FAIL The non volatile RAM has failed Contact the factory NVR OK All Logs Cleared hit key The non volatile RAM has passed Measurement Mode Messages This message may appear during one of the following tasks 1 clearing a log there are no more logs to clear 2 logging data user has hit ENT instead of selecting an old log or entering a new name 3 printing a log there are no logs to print 4 displaying a log there are no logs to display Hit any key to resume taking measurements All Sites Cleared hit key Do you want to SAVE This message may appear during one of the following tasks 1 saving a new site a new site name was not entered or overwrite existing site was not selected recalling a site there are no site files to recall clearing a site there are no sites to delete printing a site there are no sites to print displaying a site there are no sites to display Hit any key to resume taking measurements This message appears upon exiting the User Program if the new site data has not been saved Failure to save will result in loss of the new data next time the site data is changed or recalled Duplicate name Enter another The site file or log name is already in u
23. allation ER B 3 Rack Mount EPROM Replacement ern et irre B 5 Rack Mount LCD Display Replacement less terre u ERE S B 6 Rack Mount Printed Circuit Board Replacement B 7 Circuit Board Removal ee sole B 7 Circuit Bord Installation ara a dreg danos 8 8 vi Chapter 1 Calibration Introduction ans ea 1 1 MENU MOB ansehe 1 1 Calibrating the Analog Outputs 1 2 Calibrating the Analog Inputs 1 6 Calibrating the RTD Inputs 1 9 Testing the Alarm Relays 1 11 Testing the Totalizer Frequency Outputs 1 13 March 2008 Introduction Menu Map Calibrating the Model GM868 s analog outputs and inputs is explained in this chapter In addition testing the optional totalizer frequency and alarm relay outputs is discussed The following specific topics are included calibrating Slot 0 6 analog outputs calibrating Slot 1 6 analog inputs calibrating Slot 1 6 RTD inputs testing Slot 1 6 alarm relays testing Slot 1 6 totalizer frequency outputs The Model GM868 electronics console includes six expansion slots for the installation of option cards These slots are numbered 1 6 from right to left In addition every Model GM868 flowmeter includes two built in analog outputs A and B at terminal block 1 0 which is
24. appropriate section To leave the Calibration Menu press F4 EXIT twice 1 8 Calibration March 2008 Calibrating the RTD Inputs Accessing the Calibration Menu Probe Option F1 Set Point Temperature Slope Point Temperature Calibrating an RTD option card involves a different procedure than for other analog input cards However you access the card in the same manner as other cards 1 Press the CAL key to enter the Calibration Program 2 Press Fx to calibrate the desired slot The option bar will include a slot listing for each installed option card If you have installed an RTD option card the following screen appears CALIBRATION Press F1 to select the Probe Slot x Inputs method of calibration or F2 to current input selected select the numeric method RTD CALIBRAT last option selected Probe Numer The Probe option allows the meter to calculate the temperature vs resistance curve based on input from the RTD in a temperature bath or from an RTD calibrator The Numer option forces the user to calculate and input the curve values numerically IMPORTANT Use only one option for RTD calibration Do not try to calibrate with both options 3 Press F1 to select Input A or F2 to select Input B 4 Press F1 to enter the set point temperature formerly known as the zero point This temperature should be at the low end of your expected operating range 5 Enter the des
25. ch 2008 aLOW Option F1 aHIGH Option F2 4 mA Option F3 20 mA Option F4 Procedure Options 1 Enter the low reference value and press the ENT key 2 Press F1 to store the current low reference value or press F2 to cancel the entry In either case the ANALOG INPUT prompt will reappear 3 Press F2 to proceed to the next section 1 Enter the high reference value and press the ENT key 2 Press F1 to store the current high reference value or press F2 to cancel the entry In either case the ANALOG INPUT prompt will reappear 3 Proceed to Procedure Options below 1 Connect the 4 mA current source to the currently selected analog input as shown in Figure 1 3 on page 1 6 2 Press F1 to store the current 4 mA value or press F2 to cancel the entry In either case the ANALOG INPUT prompt reappears 3 Press F4 to proceed to the next section 1 Connect the 20 mA current source to the currently selected analog input as shown in Figure 1 3 on page 1 6 2 Press F1 to store the current 20 mA value or press F2 to cancel the entry In either case the ANALOG INPUT prompt reappears 3 Proceed to Procedure Options below You have completed calibration of the analog output Do one of the following To calibrate another input return to Step 3 in Accessing the Calibration Menu on the previous page To calibrate test additional slots press F4 EXIT and proceed to the
26. ct Input B 2 Press F1 to enter the set number formerly known as the zero point 3 Enter the set point temperature and press ENT 4 The program then asks for the set point number Enter the points measured at the set temperature and press ENT 5 Press F2 to enter the slope number Calculate the slope number with the formula Slope Slope points set points slope temp set temp 6 Enter the RTD slope number and press ENT You have completed calibration of the RTD input Do one of the following To calibrate another input press EXIT Tocalibrate additional slots press EXIT and then F4 EXIT and proceed to the appropriate section To leave the Calibration Menu press F4 EXIT twice Calibration March 2008 Testing the Alarm Relays Alarm relays may be added to the Model GM868 by installing an Alarms Option Card in one or more of the six expansion slots Each option card includes three alarm relays which are designated as A B and C To test the alarm relays connect an ohmmeter to the option card terminal block as shown in Figure 1 4 below Refer to the menu map in Figure 1 6 on page 1 15 as a guide Terminal Block Option Card Ohmmeter Figure 1 4 Typical Ohmmeter Connections For this discussion assume that the option card has been installed in Slot x Accessing the Calibration 1 Press the CAL key to enter the Calibration Program Meny 2 Press Fx to cal
27. ctory As a convenient reference some of the more common spare parts are listed in Table 4 2 below Table 4 2 Spare Parts List Port Number 703 1127 02 Option Card Alarms Hermetically Sealed 703 1127 03 Option Card Alarms General Purpose 703 1145 02 Option Card Analog Inputs 703 1126 02 Option Card Analog Outputs 703 1145 03 Option Card RTD Inputs 703 1144 02 Option Card Totalizer Frequency Outputs 703 1358 Option Card MODBUS 421 703 Card Cage Metal Bracket 417 027 Card Guide Nylon 703 1247 Printed Circuit Board 705 671 LCD Display Assembly 147 744 EPROM 421 701 Conduit Plate 3 4 421 702 Conduit Plate Blank 421 946 LVD Plastic Shroud 421 686 Main Aluminum Shroud 442 484 Label Wiring Diagram To purchase the parts listed in Table 4 2 above or any items not listed in the table contact the factory for assistance To make sure the proper components are obtained be sure to specify the serial number of the Model GM868 at the time of purchase Parts Replacement 4 9 Front View Keypad Cable Display Cable Nuts amp Washers 4 places Display Shroud Backlight Cable Cover Ground Wire Internal Ground Connection Fuse Holder Cap Mounting Screw 8 places Main Shroud Nuts amp Washers WARNING LVD Shroud PC Boar
28. d Power Fuse Holder Ground Wire Connector Option Cards Card Guide Metal Bracket Bottom View Display Shroud LCD Display Standoffs PC Board Screw 8 places Main Shroud Option Card Socket Metal Bracket Fasteners Option Card Standoffs typ LVD Shroud Side View March 2008 Figure 4 1 Standard Model GM868 Electronics Console Assembly Parts Replacement March 2008 Keypad Cable Backlight Cable LCD Display Display Cable J2 Connector PC Board Ground Wire Short Standoff 3 places Screws or Standoffs Vertical Components Long Standoff EPROM U4 3 places Beveled Corner Keypad Connector J50 Display Connector J52 Fasteners typ Metal Bracket Option Card Connectors Rear View Front View Figure 4 2 Standard Model GM868 Printed Circuit Board Assembly Parts Replacement Appendix A Service Record Introduction Data Entry March 2008 Introduction Whenever any service procedure is performed on the Model GM868 flowmeter 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 Data Entry Record complete and detailed service data for the Model GM868 in Table A 1 below Make additional copies of the table as needed Table A 1 Service Record Service Record A 1 March 2008 Table A 1 Service
29. e etos 2 3 ES TEMPS DET Ix else L 2 3 MUI at kan SSR ve SPR Korda late ae 2 4 FO Spee ar eee do al ala dd Vats Asset 2 4 TINGE WS c mE 2 4 ETE NOUS re ee ee ee 2 4 E13 Over Range an aus et a aaf el lee 2 4 TENNE Eee 2 4 ES SEQUOTION limits De ee 2 4 Screen Messages comte Fers electo n ette ai i eem dd 2 5 March 2008 PECCATI Q ____o gt oo ho Table of Contents cont Chapter 3 Diagnostics Moda TR 3 1 Displaying Diagnostic Parameters ee ots 3 1 DIIGO SUC AAA a EHE eei neis 3 3 POW Gell Problems soot e ee de 3 4 Gas Problems quss reellen hehe e n det a don alt 3 4 PREISEN ER ser vorne eo E A cM ae en ee 3 5 Transducer PET Saa 3 6 Chapter 4 Parts Replacement la cele seule eee 4 1 Fase Replacement en ti en feta netur betes iier tins Ren 4 2 Removing the Printed Circuit Board s cs autodata aa Rn ik 4 3 Replica cote Eno Malate a anta N a i ccr ee 4 4 Installing aN Optional re ee NS 4 5 RECINGING the LED DiS Dl eos a erst E Canto oh ouod Qt Clo tin die tar ina 4 6 Installing the Printed Circuit Board an ree tore Lp I a a 4 7 Spare Parts successes een se enr de cmt al 4 9 Appendix A Service Record os sss A re an TTA gE oi MER A 1 Data Entry cess de kr Sean an oe eae Sista ee Meaty Banan pe ached TANE A 1 Appendix B Optional Enclosures INKLOAUIEH le T 3 sas clues ee a le ee een B 1 Rack Mount Enclosure re for c d es EI e duri hne ud E ey B 1 Rack Mount Fuse RNA B 2 Rack Mount Option Card Inst
30. e printed circuit board For meters not equipped with this shroud there will be Phillips head screws in these two locations For LVD compliant units position the clear plastic LVD shroud over the electrical connections so that the two holes in the shroud align with the standoffs on the printed circuit board Secure the shroud to the standoffs with the two sets of screws and washers 10 After carefully checking for and removing any loose hardware in the enclosure close the electronics console and reconnect the main power to the Model GM868 Note For compliance with the European Union s Low Voltage Directive 73 23 EEC this unit requires an external power disconnect device 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 GM868 The power cord is the main disconnect device Before taking measurements with the Model GM868 refer to Chapter 2 Initial Setup of the Startup Guide and Chapter 1 Calibration of the Service Manual for instructions on properly setting up the meter for accurate flow rate measurements Note Be sure to enter a complete and detailed account of the service procedure performed on the Model GM868 in Appendix A Service Record Parts Replacement March 2008 Spare Parts All of the necessary components to upgrade or repair the Model GM868 flowmeter are readily available from the fa
31. e the main power to the electronics console IWARNING The main power to the Model GM868 must be disconnected before proceeding Open the electronics console For LVD compliant units remove the two mounting screws and lift the clear plastic shroud out of the electronics console Remove the six mounting screws and lift the main aluminum shroud out of the electronics console Disconnect the main power leads and the PC board ground wire from terminal block TB1 on the printed circuit board Remove the electrical connectors from all installed option cards and terminal blocks Disconnect the twisted pair display backlight cable from connector J2 on the left side of the printed circuit board Using a 3 8 in nutdriver or open end wrench remove the three short standoffs along the left side of the main circuit board and the three long standoffs along the right side of the main circuit board While supporting the printed circuit board 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 standoffs in these two locations For meters not equipped with this shroud there will be Phillips head screws in these two locations 6 Carefully lift the printed circuit board out of the enclosure Continue to support the printed circuit board as the keypad and display cables are still connected to
32. ead of SCF M See the Startup Guide for instructions The totalizers are unable to keep up with the total flow signals The programmed units pulse value is too small Select a larger number of units pulse value The steam measurement may not be within 1 accuracy The temperature or pressure reading is outside the accuracy specification of the GM868 steam equations Adjust the pressure reading to within the range of 139 9685 kPa to 2242 9435 KPa or the temperature reading to within the range of 373 1500K to 810 9278K 2 4 Error Codes and Screen Messages Screen Messages Backup Battery FAIL March 2008 A variety of messages may appear on the display screen during the performance of a task Since the error codes have already been discussed in this chapter and the locator bar messages are discussed in detail in Chapter 3 Operation of the Startup Guide they will not be repeated here All other messages are listed in Table 2 1 below Table 2 1 Screen Messages esse ecg Power Up Messages 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 DSP Processor OK The DSP digital signal processor has passed DSP RAM Failed The DSP digital signal processor RAM has failed Contact the factory DSP RAM OK The DSP digital signal processor RAM has passed EPROM sum XX
33. efer to Chapter 1 Installation of the Startup 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 measurements The gas being measured must meet the following requirements 1 The gas must be homogeneous single phase and relatively clean Although a low level of entrained particles may have little effect on the operation of the Model GM868 excessive amounts of solid or liquid particles will absorb or disperse the ultrasound signals This interference with the ultrasound transmissions through the gas will cause inaccurate flow rate measurements In addition temperature gradients in the gas flow may result in erratic or inaccurate flow rate readings 2 The gas must not excessively attenuate ultrasound signals Some gases i e high purity carbon dioxide hydrogen etc readily attenuate ultrasound energy In such a case an E1 error code message will appear on the display screen to indicate that the ultrasonic signal strength is insufficient for reliable measurements 3 The gas sound speed must not vary excessively The Model GM868 will tolerate relatively large changes in the gas sound speed as may be caused by variations in gas composition and or temperature However such changes must occur slowly Rapid fluctuations in the gas sound speed to a value that is considerably different from that
34. er a new value for L range is X XX to X XX When in the User Program this message indicates that the entered number is unacceptable Hit any key and enter a number within the allowable range Review calibration An option card error indicating a programming failure or a loss of memory Contact the factory Review parameters An option card error indicating a programming failure or a loss of memory Contact the factory Staring time must exceed current time This message appears when in the LOG menu STD option Enter a start time that is later than the current time Write error An option card error indicating a programming failure or a loss of memory Contact the factory 2 6 Error Codes and Screen Messages Chapter 3 Diagnostics Introduction ns ia 3 1 Displaying Diagnostic Parameters 3 1 Diagnostic Record var ee 3 3 FloweelliProblems ne er ence e e D RE Eee 3 4 Transducer Problems 3 6 March 2008 Introduction Displaying Diagnostic Parameters This chapter explains how to troubleshoot the Model GM868 if problems arise with the electronics console the flowcell or the transducers Indications of a possible problem include display of an error message on the active display screen erratic flow readings readings of doubtful accuracy i e readings that are not consistent with readings fro
35. erature transmitter and the connecting cable Refer to Chapter 1 Calibration and recalibrate the analog inputs on the option card Error Codes and Screen Messages 2 5 March 2008 E9 Press In E10 Special Input E11 Not Used E12 Not Used E13 Over Range E14 Totals Overflow E15 Equation Limit Problem Cause Action Problem Cause Action This message indicates a pressure input error The pressure exceeds the specified limits for the analog inputs option card Check the pressure transmitter and the connecting cable Refer to Chapter 1 Calibration and recalibrate the analog inputs on the option card This message indicates a special input error The special input exceeds the specified limits for the analog inputs option card Check the special transmitter and the connecting cable Refer to Chapter 1 Calibration and recalibrate the analog inputs on the option card This error code message is not currently in use This error code message is not currently in use Problem Cause Action Problem Cause Action Problem Cause Action This error code message indicates that the present measurement exceeds the capacity of the meter A internal mathematical overflow has occurred in either the volumetric or mass flow calculations Select larger measurement units or a shorter time interval for the current measurement parameter For example choose KSCF M inst
36. esents prompt area messages and STORE ABORT boxed text represents option bar choices 5 Fx represent function keys to select option bar choices Calibration 1 15 Chapter 2 Error Codes and Screen Messages Introduction Selle ser a Ds eS OEE ee Oe rear Loi 2 1 EO NOE S an ra AS ER 2 2 ET LOW SIGN Gli ir epi oa hb RT ata d aue 2 2 E2 Sound Speed Error if ea aa 2 2 ES Velocity RON a Rb neh 2 2 EA Signal Quo NN 2 3 ES Amplitude Error a Ov e EAE eR At 2 3 Eo Cycle Skip Accel setae A o 2 3 EZ Anolog OUT Error Zune a eL ae An Ee 2 3 EB Temp Mastek sve qu aS sept adero vs o i RE D CR EI 2 3 ES Press Ino cci ee Eo eei eu 2 4 E10 Special Inp t i i erede a nn 2 4 EIL NOLUSed i dodi ke po hte Pn ebd P tet L 2 4 ET Not Used ic cys a Fb PER PARENT ones 2 4 ETI5S OVer RONDE cese epe oder ER 2 4 E14 Totals Overflow 193 re 2 4 ELS Equation Limit u AA eee 2 4 Screen MESSAGES ua Je ca el 2 5 March 2008 Introduction The Model GM868 ultrasonic flowmeter is a reliable easy to maintain instrument When properly installed and operated as described in the Startup Guide the meter provides accurate flow rate measurements with minimal user intervention However if a problem should arise with the electronics console the transducers or the flowcell a built in error code message system greatly simplifies the troubleshooting process All of the possible M
37. for roughness and or pitting Any transducer damaged in this manner must be replaced Contact the factory for information on transducers in materials suitable for the application INTERNAL DAMAGE An ultrasonic transducer consists of a ceramic crystal bonded to the transducer case The bond between the crystal and the case or the crystal itself may be damaged by extreme mechanical shock and or temperature extremes Also the internal wiring can be corroded or shorted if contaminants enter the transducer housing PHYSICAL DAMAGE Transducers may be physically damaged by dropping them onto a hard surface or striking them against another object The transducer connector is the most fragile part and is the one most subject to damage Minor damage may be repaired by carefully bending the connector back into shape If the connector can not be repaired the transducers must be replaced Note Transducers must be replaced in pairs Refer to Chapter 2 Initial Setup of the Startup Guide to program the replacement transducer data into the meter If the instructions in this section fail to resolve the problem contact the factory for assistance Diagnostics Chapter 4 Parts Replacement Introduction sea en a 4 1 Fuse Replacement rex e hee AEG 4 2 Removing the Printed Circuit Board 4 3 Replacing the EPROM su re eier 4 4 Installing an Option Card 4 5 Rep
38. h 2008 ESS Table of Contents Chapter 1 Calibration Moe 1 1 MERMO ERREUR 1 1 Calibrating tbe Analog OPUS cs alt SR ee cH Ee RUE a 1 2 Accessing the Calibration Menu asc ae ac 1 3 Calibrating the Low End 0 RA AG DL 210 Le OA DE ties m ee o mA ae 1 3 Calibrating the High End of the Output Range aussen aa LEER 1 4 Testing the Analog Output Unneg nusura rrano narrer rrr rrr rnrn 1 4 Calibrating the AdO NDU S areas east 1 6 Accessing the Calibration Menu sa stern Gta ett e Gt dde td eed et s 1 7 GLOW PIN 1 8 PET OBEN d z Lasa each 1 8 a RAO DEON IE rast een edite ela er libet RE 1 8 NNN NA o ORES DD ut ET E dre 1 8 ORME he RTDTBDUES NS 1 9 Accessing the Calibration Menu oth se poter bile obe o ed det tb e beard 1 9 Probe Option D Tac ss ra er UD E E pera oc re 1 9 Numer Option RZ ee De EET DERE 1 10 Testing the Alam Relays eeu ea AG 1 11 Accessing the Calibration Meri 1 53529 ce shes RR v ee ol 1 11 Testing the Lotalizer Frequency OUEDUIES aan cet Eb Ra ES EAE E aile sen 1 13 Accessing the Calibration Mem e exe er ERR ei Na 1 13 Entering Frequency scan oe dh 1 13 Entering Pulse Number e ei cance coats ee 1 14 Chapter 2 Error Codes and Screen Messages A p cR 2 1 EO NOE OT eda 2 2 ERNST 2 2 Ec Sound Speed Enor annede a a ee bd tk rett boat 2 2 RV REN 2 2 E4 Signal ON Le dde 2 3 ESSAMPItIAS EITOEF Soi ers des rende AE IU ERES fak ILES a 2 3 ES EVCIESKIP ACESI ni er Va a ue c A ee ee eS fes 2 3 ENE Scene at O al t
39. he Calibration Menu on page 1 3 1 Press F3 to TEST the linearity of the currently selected analog output 2 Check the ammeter reading at the 5096 output level 3 Then enter a different output level 0 100906 and press ENT 4 Check the ammeter reading at this setting and press ENT when done Table 1 1 on the next page lists the expected ammeter readings at various 96 Full Scale settings for both 4 20 mA and 0 20 mA scales Refer to this table to verify the accuracy of the ammeter readings taken above 1 4 Calibration March 2008 Testing the Analog Output Linearity cont Table 1 1 Expected Ammeter Readings Full Scale 4 20 mA Scale 0 20 mA Scale All ammeter readings should be 0 005 mA If the linearity test readings are not within 5 uA of the values listed in Table 1 1 above check the accuracy and wiring of the ammeter Then repeat the low and high end calibrations If the analog output still does not pass the linearity test contact the factory for assistance Procedure Options You have completed 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 1 3 To calibrate test additional slots press F4 EXIT twice and proceed to the appropriate section To leave the Calibration Menu press F4 EXIT three times Calibratio
40. he printed circuit board face down on a clean flat surface Locate the EPROM socket in the top left corner of the board Caution The EPROM is easily damaged by static electricity Before handling the new chip touch a grounded metal object to discharge any built up static electricity and avoid touching the leads on the side of the chip 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 corners of the socket Gently pry the EPROM up a little at a time at each notch until it comes free 4 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 5 By applying equal pressure on all four corners gently press the EPROM into the socket until it is fully seated Do not strike the EPROM or apply excessive force during this procedure Complete the EPROM replacement by proceeding to the Installing the Printed Circuit Board section of this chapter page 4 7 Note f you have installed a new EPROM upon reinitialization the GM868 displays a message Slot x Params appended This message directs users to check the slot error handling on the option cards and appears on power up until you review the parameters in the I O submenu OPTN option 4 4 Parts Replacement March 2008 Installing an Option Card The Model GM868 fl
41. ibrate the desired slot The option bar will include a slot listing for each installed option card 3 Press F1 F3 to select alarm relay A B or C respectively Calibration 1 11 March 2008 Testing the Alarm Relays Note The procedure for testing Alarm Relay A is identical to that for cont testing Alarm Relays BandC However make sure that the ohmmeter is connected to the desired normally open or normally closed contact of the currently selected relay See Figure 1 4 on page 1 11 for the correct pin 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 the above procedure until both the normally open and normally closed contacts for all three alarm relays have been tested Then proceed to Procedure Options below Procedure Options You have completed testing the alarm relays Do one of the following To calibrate test additional slots press F4 EXIT and proceed to the appropriate section To leave the Calibration Menu press F4 EXIT twice 1 12 Calibration March 2008 Testing the Totalizer Totalizer Frequency outputs may be added to the Model GM868 by Frequency Outputs installing a Totalizer Frequency Option Card in one or more of the six expansion slots Each option card includes four outputs which are designated as A B C and
42. igure B 2 on page B 11 and complete the following steps 1 After disconnecting the main power to the meter remove the top panel from the enclosure by removing the four screws indicated IWARNING The main power to the Model GM868 must be disconnected before proceeding 2 Using a 3 16 in nutdriver remove the four nut washer sets that secure the display shroud to the inside of the front panel Pull the display shroud off its mounting studs 3 Using a 1 4 nutdriver remove the four standoffs that secure the LCD display assembly to the front panel Pull the LCD display assembly off its mounting studs 4 Place the new display in the enclosure and replace the circuit board connections of the data and power cables of the old display with those of the new display Be sure to orient the new cables in the same way as the old ones when making the connections to the printed circuit board Remove and discard the old LCD display 5 Place 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 toward the left side away from the keypad of the meter Caution Do not overtighten the standoffs or the display assembly may be damaged 6 Position the LCD display cables between the two mounting studs and install the display shroud over the mounting studs The top and bottom edges of the shroud are bent a
43. ing a small standard screwdriver turn the fuse holder cap counterclockwise about 1 4 turn The fuse holder cap with the captive fuse will be ejected from the fuse holder 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 1 below and on the wiring diagram label Table 4 1 Line Voltages amp Fuse Ratings Line Voltage Fuse Rating 100 120 VAC 1 0 A Slo Blo 220 240 VAC 0 5 A Slo Blo 12 28 VDC 3 0 A Slo Blo Press the new fuse into the fuse holder cap and insert the fuse into the fuse holder While applying a slight pressure with the screwdriver twist the fuse holder cap 1 4 turn clockwise For LVD compliant units place the clear plastic shroud over the standoffs in the electronics console and secure it in place with its two mounting screws Close the cover on the electronics console The Model GM868 flowmeter may now be placed back into service Reconnect the main power and resume taking measurements Note Be sure to record the fuse replacement in Appendix A Service Record 4 2 Parts Replacement March 2008 Removing the Printed Circuit Board All of the remaining maintenance procedures discussed in this chapter require removing the printed circuit board To accomplish this task refer to Figure 4 1 on page 4 10 and Figure 4 2 on page 4 11 while completing the following tasks 1 Remov
44. ion Connections 1 6 Calibration March 2008 Analog Inputs Option Card cont Accessing the Calibration Menu For this discussion assume that the option card has been installed in Slot x Note The zero point of the analog input may be set for either 0 mA or 4 mA However the calibration procedure always uses the 4 mA point as the meter will extrapolate this value to obtain the 0 mA point 1 Press the CAL key to enter the Calibration Program 2 Press Fx to calibrate the desired slot The option bar will include a slot listing for each installed option card 3 Press Fx to select the desired input The 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 terminal block See Figure 1 3 on the previous page for the correct pin numbers To calibrate a 0 4 20 mA input card see the section below Note 7o calibrate an RTD input card refer to page 1 9 4 Press F1 F4 to select the reference point to be calibrated Do one of the following If you selected F1 aLOW proceed to aLOW Option on the next page If you selected F2 aHIGH proceed to aHIGH Option on the next page If you selected F3 4 mA proceed to 4 mA Option on the next page If you selected F4 20 mA proceed to 20 mA Option on the next page Calibration 1 7 Mar
45. ired set point temperature and press ENT 6 Press F1 to STORE the entered temperature or F2 to ABORT the calibration In either case the screen returns to the ANALOG INPUT prompt 7 Press F2 to enter the slope point temperature This temperature should be as far from your set point as your temperature bath will allow within the range 100 to 350 C 8 Enter the desired slope point temperature and press ENT 9 Press F1 to STORE the entered temperature or F2 to ABORT the calibration In either case the screen returns to the ANALOG INPUT prompt 10 Proceed to Procedure Options on the next page Calibration 1 9 March 2008 Numer Option F2 Set Number Slope Number Procedure Options The Numer option forces the user to calculate the temperature vs resistance information To do this the user must first collect data using the RTDs option in the PRINT menu discussed in Chapter 5 of the Programming Guide The RTDs option allows you to know what point value the GM868 is reading at a given temperature With this information the Numer option enables you to enter the Set Temperature and the slope of the RTD input in points degree allowing absolute control over RTD calibration Before attempting this step follow the instructions in Chapter 5 of the Programming Manual The RTDs Submenu to obtain point values at your set point and slope point 1 Press F1 to select Input A or F2 to sele
46. lacing the LCD Display 4 6 Installing the Printed Circuit Board 4 7 Spare Part vars a P 4 9 March 2008 Introduction The electronics console of the Model GM868 has been designed to permit easy on site upgrades and parts replacement See Figure 4 1 on page 4 10 and Figure 4 2 on page 4 11 for details of the standard GM868 electronics console assembly The instructions in this chapter along with a few common tools are all that is required to perform the following tasks fuse replacement printed circuit board PCB removal and installation EPROM replacement option card installation LCD display replacement IMPORTANT For meters supplied in any of the optional enclosure types see Appendix B Optional Enclosures for instructions specific to that unit IWARNING Prior to performing any maintenance procedures be sure to disconnect the main power from the unit Note For compliance with the European Union s Low Voltage Directive 73 23 EEC this unit requires an external power disconnect device 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 GM868 The power cord is the main disconnect device An aluminum shroud over the printed circuit board shields the electrical components and serves as a location for the wiring diagram label
47. left side of the printed circuit board Securely tighten all eight standoffs and or screws IMPORTANT Correctly installing the grounding strap may require some patience but resist the temptation to place the grounding strap on top of the printed circuit board Parts Replacement 4 7 March 2008 Installing the Printed Circuit Board cont Connect the twisted pair backlight cable to socket J2 on the left edge of the printed circuit board This plug is polarized so that it can only be installed in the proper orientation with the black wire above the red wire Check for and remove any loose hardware that may have fallen into the electronics console during the maintenance procedure Place the main shroud over the six upper standoffs on the printed circuit board Making sure that the shroud is oriented with the wiring diagram label upright fasten the shroud to the standoffs with the six sets of screws and washers Reconnect the power line wires and the PC board ground wire to terminal block 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 instructions on proper wiring of the Model GM868 Note For an LVD compliant meter with the clear plastic shroud over the electrical connectors there will be standoffs in the two mounting locations along the bottom edge of th
48. m another flow measuring device connected to the same process If any of the above conditions occurs proceed with the instructions presented in this chapter The Model GM868 has a built in Diagnostics Menu to aid in the troubleshooting 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 instructions on setting the display screen to the desired format and enter the Diagnostics Menu as shown below Ch label Press the lt or gt keys until the desired channel option appears on the option bar Press the appropriate Fx key to select this option Note Fora I Channel Model GM868 the above prompt does not appear and the following prompt is the initial screen Ch label Press the lt or gt keys until DIAG appears on the option bar Press the appropriate Fx key to select this option error codes appear here TIME DIAG Note Chl or Ch2 which is shown in parentheses above appears in the locator bar only with a 2 Channel Model GM6668 For example pressing F1 displays the Tdown parameter as shown in the following prompt Diagnostics 3 1 March 2008 Displaying Diagnostic Parameters cont Chi Ch1 DN Transit usec 519 7 error codes appear here Tdown DELTA TERA Qup PME Press the lt and gt keys and the appropria
49. n 1 5 March 2008 Calibrating the Analog Inputs Analog inputs may be added to the Model GM868 flowmeter by installing an Analog Inputs Option Card in one or more of the six expansion slots The option card contains two 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 the inputs their linearity should be tested Calibration of the analog inputs requires the use of a calibrated current source If an independent calibrated current source is not available one of the Slot 0 analog outputs may be used for the calibration During the analog input calibration the Slot 0 analog output will supply the low reference high reference 4 mA and 20 mA signals at the appropriate times Note fa Slot 0 analog output will be used to calibrate the analog inputs make sure that the Slot 0 analog output calibration procedure has already been completed Connect the Slot 0 analog output s or an independent calibrated current source to the analog input s on the option card as shown in Figure 1 3 below Refer to the menu map in Figure 1 6 on page 1 15 as a guide Analog Input Option Card Terminal Block I O Slot 0 Figure 1 3 Analog Input Calibrat
50. nt of the enclosure Using a slotted screwdriver remove the three mounting screws along each side of the printed circuit board Carefully lift the printed circuit board out of the enclosure Proceed to the next section for instructions on installing the new printed circuit board Refer to Figure B 2 on page B 11 and complete the following steps 1 Position the new printed circuit board within the electronics console so that it rests on the six standoffs in the base of the enclosure and the option card sockets are located near the rear of the enclosure Secure the circuit board in place with the six screws previously removed Connect the flat LCD DISPLAY CABLE connector to terminal J52 near the option card sockets Make sure the marked pin 1 side of the cable connector is located nearer the front of the enclosure Connect the twisted pair DISPLAY BACKLIGHT cable to connector J2 beneath the left side of the printed circuit board This connector is polarized and can only be installed with the red wire closer to the rear of the enclosure Connect the flat KEYPAD CABLE connector to terminal J50 near the front of the printed circuit board Make sure the marked pin 1 side of the cable connector is located nearer the rear of the enclosure B 8 Optional Enclosures March 2008 Circuit Board Installation cont 5 Install the RS232 ANALOG OUT and TRANSDUCER connectors onto the printed circuit board at the
51. odel GM868 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 pane of the display screen in the location shown in Figure 2 1 below Prompt Area Locator Bar Pointer Velocity Option Bar Error Message Figure 2 1 A Typical Display Screen Note For a 2 Channel Model GM868 the channel number is displayed in front of the error message Only the error message appears with a 1 Channel Model GM868 If an error message appears on the display screen during operation of the Model GM868 refer to the appropriate section of this chapter for instructions on how to proceed Error Codes and Screen Messages 2 1 March 2008 EO No Error Problem Cause Action E1 Low Signal Problem Cause Action E2 Sound Speed Error Problem Cause Action E3 Velocity Range Problem Cause Action No error condition currently exists This message appears briefly to confirm that the response to another error message has corrected the problem No action is required Poor ultrasonic signal strength or the signal exceeds the limits entered via the User Program Poor signal strength may be caused by a defective cable a flowcell problem a defective transducer or a problem in the electronics console A signal that exceeds the programmed limits is probably caused by the entry of an improper
52. on Card 1 10 Error Message 2 1 Illustration 2 1 Index March 2008 Index cont O T Option Card Temperature Input Error E8 2 3 Analog Outputs 1 2 Totalizer Frequency Option Card Testing 1 13 Bracket 24 itunes units 4 5 Totals Overflow Error E14 2 4 Expansion Slots 1 1 Transducers Guides iia ts e Rete 4 5 A nn 3 6 Installing 4 5 Internal Damage 3 6 SOCKS Li ha ene teks 4 5 PEAKS See Ma 3 6 Over Range Error E13 2 4 Physical Damage 3 6 Placement u u a aed Gran a 3 5 P Problems oce ease heed sae Ace rona yat 3 6 Pipe Measurements 3 5 U Problems as sites Gin bin ie ta 3 5 User Program Pressure Input Error E9 2 4 EPROM nest foin es 4 4 Printed Circuit Board Upgrading 4 4 EPROM uu tad ii 4 4 Replacing eres hane Lune 4 3 V PROBE Option Velocity Range Error E3 2 2 for RTD Option Card 1 9 Problems Transducers 3 6 R Reboot Automatic 1 1 Replacing See Part Name S Screen Messages Table 2 5 Service Record A 1 Shroud Aluminum 4 1 4 8 LCD Display 4 6 EVD 5 A 4 8 Plas
53. owmeter can accommodate up to six option cards The option cards are installed into sockets on the rear of the printed circuit board and they are held in place with a metal bracket A single metal bracket is used to secure all the installed option cards Note Ifthe Model GM868 presently has no option cards installed be sure to purchase the metal mounting bracket along with the first option card To install an option card refer to Figure 4 2 on page 4 11 and complete the following steps 1 Remove the printed circuit board as described in a previous section of this chapter 2 If one or more option cards are already installed 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 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 of the printed circuit board To install an option card insert its 32 pin connector into any available option card socket and gently press the card into place Make sure that the pins in the connector are straight and properly aligned with the socket and that the connector is positioned on the right side of the option card Caution Do not force the option card into the socket If the card does not enter the
54. rate readings Refer to Chapter 2 Initial Setup of the Startup Guide for instructions on programming the pipe data In addition to the actual pipe dimensions the path length P and the axial dimension L based on the actual transducer mounting locations must be accurately programmed into the flowmeter For a GE flowcell this data will be included with the documentation for the system If the transducers are mounted onto an existing pipe these dimensions must be precisely measured See Appendix D Measuring P and L Dimensions of the Startup Guide for a thorough discussion of this topic Diagnostics 5 5 March 2008 Transducer Problems Ultrasonic transducers are rugged reliable devices However they are subject to physical damage from mishandling and chemical attack The most common transducer problems are listed below 1 LEAKS Leaks may occur around the transducer and or the flowcell fittings Repair such leaks immediately If the leaking gas is corrosive carefully check the transducer and cables for damage after the leak has been repaired CORROSION DAMAGE If the transducer material was not properly chosen for the intended application the transducers may suffer corrosion damage The damage usually occurs either at the electrical connector or on the transducer surface If corrosion is suspected remove the transducer from the flowcell and carefully inspect the electrical connector and the transducer surface
55. rating as indicated in Table B 1 below and on the rear panel label Table B 1 Line Voltages amp Fuse Ratings Line Voltage Fuse Rating 100 120 VAC 1 0 A Slo Blo 220 240 VAC 0 5 A Slo Blo 12 28 VDC 3 0 A Slo Blo 4 Reinstall the black plastic fuse cover and insert the power cord back into the receptacle Then position the power switch in the ON position The Model GM868 flowmeter may now be placed back into service Reconnect the main power and resume taking measurements Note Be sure to record the fuse replacement in Appendix A Service Record B 2 Optional Enclosures March 2008 Rack Mount Option Card The Model GM868 flowmeter can accommodate up to six option Installation cards in a manner similar to that used in a PC The option cards are installed into sockets on the printed circuit board and they are held in place with a metal bracket A single metal bracket is used to secure all the installed option cards Note Ifthe Model GM868 presently has no option cards installed be sure to purchase the metal mounting bracket along with the first option card Refer to Figure B 2 on page B 11 and complete the following steps 1 After disconnecting the main power to the meter remove the top panel from the enclosure by removing the four screws indicated IWARNING The main power to the Model GM868 must be disconnected before proceeding 2 If one or more option cards are already installed remove the fo
56. sconnect all external option card connectors at the rear panel of the meter Then remove all installed option cards from the printed circuit board as described earlier in this chapter 3 Disconnect the main POWER LEADS from the screw terminals at the rear of the printed circuit board Make a sketch of the terminal block and the locations of the black white and green power leads to assist in reinstallation on the new circuit board 4 Remove the RS232 ANALOG OUT and TRANSDUCER connectors from the printed circuit board Use a marker to identify pin 1 on the right side keypad side of these connectors Optional Enclosures B 7 March 2008 Circuit Board Removal cont Circuit Board Installation Note These connectors should be pulled straight up and off the printed circuit board DO NOT remove the leads from the screw terminals Remove the flat KEYPAD CABLE connector from terminal J50 near the front of the printed circuit board Mark pin 1 of the cable connector which is located nearer the rear of the enclosure Disconnect the twisted pair DISPLAY BACKLIGHT cable from connector J2 beneath the left side of the printed circuit board Although this connector is polarized it will help to note that the red wire is closer to the rear of the enclosure Remove the flat LCD DISPLAY CABLE connector from terminal J52 near the option card sockets Mark pin 1 of the cable connector which is located nearer the fro
57. se Enter a different name Error Codes and Screen Messages 2 5 March 2008 Table 2 1 Screen Messages Continued ring End Time must exceed Start Time by 5 min This message appears when in the LOG menu Enter an end time that is at least five minutes later than the start time Header invalid An option card error indicating a programming failure or a loss of memory Contact the factory Log Active END only hit any key When in the LOG menu this message indicates that the log is still compiling data Only the End Time may be edited Log DONE to inspect hit any key When in the LOG menu this message indicates that the log is com plete Hit any key to display the log Log hasn t started hit key When in the LOG menu this message indicates that the log has not yet started OK settling The measurement has not stabilized Wait before taking a reading Outside limits value rejected When in the CAL menu this message indicates that the calibration of the analog output is invalid Hit any key to clear the message and the GM868 will default to the last valid calibration The message will also appear if there is no ammeter connected to the analog out put during calibration Overflow The display value overflowed Reduce the number of decimal digits or change the units P lt L Enter L again The entered path length P is less than the axial dimension L Ent
58. six sockets on the printed circuit board do not install the bracket rotated 180 out of position Secure the metal bracket to the printed circuit board with the four plastic snap rivets provided 7 After checking for any loose hardware that may have fallen into the enclosure reinstall the top panel on the meter and secure the panel in place with the four screws previously removed The Model GM868 flowmeter may now be placed back into service Reconnect the main power and refer to Appendix C Optional Enclosures of the Startup Guide for instructions on wiring the new option card s Note Be sure to record the option card installation in Appendix A Service Record B 4 Optional Enclosures March 2008 Rack Mount EPROM The Model GM868 s User Program is stored on an erasable Replacement programmable read only memory EPROM chip The EPROM which is designated as component U4 is located on the corner of the printed circuit board just behind the keypad on the front panel EPROM replacement may be required to replace a defective chip or to upgrade to a newer software version To replace the EPROM refer to Figure B 2 on page B 11 and complete the following steps 1 After disconnecting the main power to the meter remove the top panel from the enclosure by removing the four screws indicated IWARNING The main power to the Model GM868 must be disconnected before proceeding 2 Using a chip puller remove the EPROM from i
59. socket easily check for and straighten any bent pins in the connector and try again 4 Repeat step 3 to install any additional option cards 5 Place the metal bracket over the option cards making sure that all option cards are aligned with the plastic card guides in the bracket Secure the metal bracket to the printed circuit board with the snap rivets provided See the installed assembly in Figure 4 1 on page 4 10 Complete the option card installation by proceeding to the Installing the Printed Circuit Board section of this chapter Parts Replacement 4 5 March 2008 Replacing the LCD Display The Model GM868 s measurements are displayed on a a two pane LCD graphic display panel The LCD display normally provides years of dependable service but it is easily field replaceable when necessary To replace the LCD display see Figure 4 1 on page 4 10 for the component locations and complete the following steps 1 Remove the printed circuit board as described in a previous section of this chapter 2 Using a 3 16 in nutdriver remove the four nut washer sets that secure the display shroud to the inside of the console cover Lift the display shroud off its mounting studs 3 Using a 1 4 nutdriver remove the four standoffs that secure the LCD display assembly to the console cover Lift the LCD display assembly off its mounting studs 4 Place the new LCD display assembly over the mounting studs on the console cover
60. t a 90 angle to the main surface and these edges must face inwards toward the display assembly Note One edge of the display shroud is covered with a piece of black electrical tape This side of the shroud should be over the cables to protect them against abrasion B 6 Optional Enclosures March 2008 Rack Mount LCD Display Replacement cont Rack Mount Printed Circuit Board Replacement Circuit Board Removal 7 Fasten the display shroud to the front panel with the four sets of nuts washers Caution Do not overtighten the nuts or damage to the mounting threads may occur 8 After checking for any loose hardware that may have fallen into the enclosure reinstall the top panel on the meter and secure the panel in place with the four screws previously removed The Model GM868 flowmeter may now be placed back into service Reconnect the main power and resume taking measurements Note Be sure to record the LCD Display replacement in Appendix A Service Record If troubleshooting procedures have indicated a defective printed circuit board follow the instructions in this section to replace the defective board with a new one Refer to Figure B 2 on page B 11 and complete the following steps 1 After disconnecting the main power to the meter remove the top panel from the enclosure by removing the four screws indicated IWARNING The main power to the Model GM868 must be disconnected before proceeding 2 Di
61. talling an Analog Outputs Option Card in one or more of the six expansion slots Each option card contains four analog outputs which are designated as A B C and D Both the zero point and full scale values for each output must be calibrated After calibrating the outputs which have a resolution of 5 0 uA 0 03 full scale their linearity should be tested Note The zero point of the analog output may be set for either 0 mA or 4 mA However the calibration procedure always uses the 4 mA point as the meter will extrapolate this value to obtain the 0 mA point Prepare for the calibration procedure by connecting an ammeter to the desired analog output of Slot X as shown in Figure 1 1 below and Figure 1 2 on the next page Refer to the menu map in Figure 1 6 on page 1 15 Terminal Block I O Slot 0 B B A A RTN SIG RTN SIG Ammeter Figure 1 1 Ammeter Connection for Slot 0 Output A 1 2 Calibration March 2008 Calibrating the Analog Outputs cont Terminal Block Option Card Ammeter Figure 1 2 Ammeter Connection for Slots 1 6 Output A Accessing the Calibration 1 Press the CAL key to enter the Calibration Program Menu 2 Press Fx to calibrate the desired slot The option bar will include a slot listing for each installed option card 3 Press Fx to select the desired output IMPORTANT The procedure for calibrating all the outputs is the same However when calibrating a different
62. te Fx Key to display a different diagnostic parameter or to EXIT the Diagnostics Menu Table 3 1 below lists the available diagnostic parameters for the Model GM868 The first column in the table shows the parameter as it appears on the option bar while the second column shows the parameter as it appears in the prompt area after it has been selected Table 3 1 Available Diagnostic Parameters Option Bar Screen Display Description Good Bad Displays the signal strength for the upstream transducer lt 50 or gt 75 SS up UP Sig Strength SS do DN Sig Strength Displays the signal strength for the downstream transducer lt 50 or gt 75 SNDSP Soundspeed Ft s Displays the measured sound speed of N A N A the fluid UP Transit S usec DN Transit usec Displays the upstream transit time of the ultrasonic signal in microseconds Displays the downstream transit time of the ultrasonic signal in microseconds DELTA DeltaT usec Displays the difference in usec between N A gt 10 000 upstream and downstream transit times nsec PEAK PEAK Displays the percentage of peak set to 50 by default N A Qup UP Signal Q Displays the signal quality for the upstream transducer 400 to 400 Qdown DN Signal Q Displays the signal quality for the downstream transducer 400 to 400 AMPup UP Amp Discrim Displays the value for the amplitude discriminator of the upstream transducer
63. the rear of the board Caution During this procedure be very careful not to damage the upright components along the top edge of the printed circuit board see Figure 4 2 on page 4 11 Severe or repeated bending of these components will break their leads 7 Tilt the top of the printed circuit board forward and mark the top edges of the two ribbon cable connectors Then remove these cables from their connectors on the rear of the board Parts Replacement 4 3 March 2008 Removing the Printed Circuit Board cont Replacing the EPROM 8 The printed circuit board is now free and may be removed to a clean work area If the printed circuit board is being replaced proceed to the section on Installing the Printed Circuit Board page 4 7 now Otherwise refer to the appropriate section for instructions on Installing an Option Card page 4 5 Replacing the EPROM below or Replacing the LCD Display page 4 6 The Model GM868 s User Program is stored on an erasable programmable read only memory EPROM chip The EPROM which is designated as component U4 is located in the top left corner of the rear of the printed circuit board see Figure 4 2 on page 4 11 EPROM replacement may be required to replace a defective chip or to upgrade to a newer software version To replace the EPROM complete the following steps 1 Remove the printed circuit board as described in a previous section of this chapter 2 Place t
64. tic ae 4 8 Signal Quality Error E4 2 3 Sockets Option Card 4 5 Soundspeed Error B2 cn les il ias 2 2 Gasen serien sinne ene 3 4 Spare Parts List 4 9 Special Input Error E10 2 4 2 Index DECLARATION Sensing OF CONFORMITY We Panametrics Limited Shannon Industrial Estate Shannon County Clare Ireland declare under our sole responsibility that the DF868 Liquid Ultrasonic Flowmeter GF868 Flare Gas Ultrasonic Flowmeter GM868 Multi Purpose Gas Ultrasonic Flowmeter GN868 Natural Gas Ultrasonic Flowmeter GS868 Steam Mass Ultrasonic Flowmeter to which this declaration relates are in conformity with the following standards e EN 61326 1998 Class A Annex A Continuous Unmonitored Operation e EN 61010 1 1993 A2 1995 Overvoltage Category II Pollution Degree 2 following the provisions of the 89 336 EEC EMC Directive and the 73 23 EEC Low Voltage Directive The units listed above and any transducers supplied with them spoolpieces are addressed under a separate declaration of conformity do not bear CE marking for the Pressure Equipment Directive as they are supplied in accordance with Article 3 Section 3 sound engineering practices and codes of good workmanship of the Pressure Equipment Directive 97 23 EC for DN 25 Shannon June 1 2002 p Hd Mr James Gibson GENERAL MANAGER CE e LS EN 180 9002 T V ESSEN Shannon ISO 9001 U
65. ts socket If a chip puller is unavailable a straightened paper clip may be used in the notches at opposite corners of the socket Gently pry the EPROM up a little at a time at each notch until it comes free Caution The EPROM is easily damaged by static electricity Before handling the new chip touch a grounded metal object to discharge any built up static electricity and avoid touching the leads on the side of the chip 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 applying equal pressure on all four corners gently press the EPROM into the socket until it is fully seated Do not strike the EPROM or apply excessive force during this procedure 5 After checking for any loose hardware that may have fallen into the enclosure reinstall the top panel on the meter and secure the panel in place with the four screws previously removed The Model GM868 flowmeter may now be placed back into service Reconnect the main power and resume taking measurements Note Be sure to record the EPROM replacement in Appendix A Service Record Optional Enclosures B 5 March 2008 Rack Mount LCD Display The Model GM868 measurements are displayed on a two pane LCD Replacement graphic display panel The LCD display normally provides years of dependable service but it is field replaceable when necessary To replace the LCD display refer to F
66. ur 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 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 of the printed circuit board By removing the screw on the rear panel remove the appropriate option slot cover to make room for the external connector on the 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 and properly aligned with the socket and that the option card is oriented with its external connector positioned in the opening on the rear panel Caution Do not force the option card into the socket If the card does not enter the socket easily check for and straighten any bent pins in the connector and try again 5 Repeat steps 3 and 4 to install any additional option cards Optional Enclosures B 3 March 2008 Rack Mount Option Card 6 Place the metal bracket over the option cards making sure that all Installation cont installed option cards are inserted into the plastic card guides in the bracket The bracket must be oriented so that the six card guides are directly above the

DigitalFlow™ GM868 - GE Measurement & Control

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DigitalFlow&trade; GM868 - GE Measurement &amp; Control

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DigitalFlow™ GM868 - GE Measurement & Control