Home

GE Panametrics XMT868i Ultrasonic Flow Transmitter

1. YES Slot 0 Analog Outputs Slot 1 Option Card Analog Inputs Slot 1 Alarm Relays A B C B C ANALOG OUTPUT press ESC key ALARMS 4 mA 20mA TEST EXIT ANALOG INPUT OPEN Full Scale tLOW tHIGH 4mA CALIBRATING LOW REFERNCE TEMP HIGH REFERNCE TEMP Numer STORE CALIBRATING mA Reading ABORT Slot 1 Totalizer Outputs Figure 3 Calibration Menu Map B C Slot 1 Analog Outputs PULSE ON TIME A B Slot 1 RTD Inputs PULSES ANALOG OUTPUT B C 4mA 20mA TEST EXIT press ESC key Full Scale ANALOG INPUT Slot 1 Frequency Outputs CALIBRATING tLOW tHIGH B C D LOW REFERNCE TEMP HIGH REFERNCE TEMP
2. Numer STORE CALIBRATING FREQUENCY mA Reading ABORT NOTE Plain text represents prompt area messages and boxed text represents option bar choices Fx represent function keys to select option bar choices DigitalFlow XMT868i Service Manual 11 H 5 Aa 2 3 4 5 6 7 8 9 10 11 H cu 3 EN 2 CoOAND OAR WD N ure no e gt gt Se LS gt mI Pl ce e 6680090020668 23 rr c e gt CO CO VU ODO OOOO WW OS mum mom c c 07 CIR OUT A RIN A NC DUT H RIN B NC OUTC 24V INPUTC INPUT C RTN RID D COMM D COM D Re 5 m 02 FF TT FT CT CF Pin 1 OUT A RTN o o Jo 0 FW PD vek eo no TC 24V TC UTC RTN UTD 24V UTD UTD RTN ai echt O O ON DOO FW PD no 14 IR OUT A 24V INPUT A INPUT A RTN OUT B 24V INPUT B INPUT B RTN RID C COMM C COM C RID D COMM D COM D DigitalFlow XMT868i Service Manual A LA O OO OD JO Om FW nm no 03 FO TO CO Pin 1 OUT A RIN A C OUT B RIN B NC NC NC NC NC C OUT C 24V INPUT C INPUT C RTN OUT D 24V INPUT D INPUT
3. Soundspeed DN Sig Strength Soundspeed Signal strength for the downstream transducer Measured speed of sound in the fluid 50 or 75 DAC up UP DAC AGC DAC count for upstream gain setting DAC do DN DAC AGC DAC count for downstream gain setting T up UP Transit Upstream ultrasonic signal transit time Tdown DN Transit Downstream ultrasonic signal transit time DELTA DeltaT Transit time difference between upstream and downstream signals lt 1 usec gt 1 usec depends on application REYN Reynolds number Current velocity reynolds number N A K RE K RE K factor based on the Reynolds number N A PEAK PEAK Percentage of peak set to 50 by default N A THETA Theta 3 Theta 3 is the angle between the ultrasonic beam and the normal to the pipe wall It is calculated from the measured transit time and the clamp on parameters clamp ons only N A UP Signal Q Displays the signal quality for the upstream transducer 1200 to 1200 DN Signal Q UP Amp Discrim DN Amp Discrim Displays the signal quality for the downstream transducer Displays value for signal amplitude of the upstream transducer Displays value for signal amplitude of the downstream transducer 1200 to 1200 19 or gt 29 19 or 29 P up UP Peak Displays signal peaks for the upstream t
4. Contents Chapter 4 Parts Replacement 4 1 4 2 4 5 4 4 4 5 4 6 4 7 A 1 A 2 Esha dele iss a oman pee eee aoe Meee ee Oe See MAIER ES Ae ON eR EE 27 Bereet A 28 Replacing the LCD Display Interconnect Board Subassembly sees 30 Replacing br Fuse ime AERE EE T ER ET DRE 31 Replgcinmdtie Deer Prora EE 32 Installing et Op OPPIDO or posco od Lor deep Corr erret Corset ar APR AE aer Er um 33 4 6 1 Attaching an Optional Heat Sink to an I O Option Cord 34 Assembling Installing the Circuit Board Assembly ree RUE E eme RR Eb ex ER A des 35 4 7 1 Assembling the Circuit Board Aesembkvy eet e e een 35 4 7 2 Installing the Circuit Board ASSemIDI Weste doe petita tenen ERR Cs ew LR PS cl ELATI UR CHR GC V 37 Appendix A Service Record VIVE ACU Boo erectae M E to etes velum E hu UU n eM EM Ue 45 Data ENV sse ssa o eb sage oe iac ed abe etie tec tuned turis vtae toties s 43 Table 6 Diagnostic Parameter Sce ccs ao te e e D EI ab ORO N Yo a tame R NN S E Ea d 45 Appendix B Calibration and Testing with PanaView B 1 B 2 B 3 B 4 B 5 Cl C 2 C 3 Introd ctoN oo sets Seti E gett E AE Ae e 47 Accessing the Calibration Test Menu sacos iori pepe oris t Uo etui shail he btt woe Lees eat 47 Calibrating Slot G Anglo OUTPUTS aai ds plex tet Er FPES Se Ute FER xS o nO gie Ate ente 49 CONDI aI ee ee ls ness ver ei ie Stree ee er ie t oe v idus uv a A 51 EP MIS SIS Io a T9 O10 EE 52 B2 Analog INOU ee eto E E E emi dai emat EN
5. 4 Use the arrow keys to enter a value for the minimum pulse on time between 1 psec and 10 000 usec for the frequency of the totalizer pulses and press Enter Note A complete pulse consists of equal amounts of ON and OFF times Choose a value that is compatible with the pulse counter to be used 5 Usethe arrow keys to enter a value for the number of measurement units represented by each pulse between 1 and 10 000 and press Enter That number of pulses will then be output at the specified frequency 6 Verify that the pulse counter reads the correct value 1 7 2a Procedure Options This completes testing of the Slot 1 totalizer outputs Do one of the following To test another of the available totalizer outputs return to Step 3 in Testing the Output above If any of the totalizer outputs fails the test contact the factory for assistance To calibrate test additional inputs outputs proceed to the appropriate section To leave the Keypad Program press Escape twice DigitalFlow XMT868i Service Manual 9 Chapter 1 Calibration 1 8 Testing the Frequency Outputs Frequency outputs may be added to the Model XMT868i by installing an appropriate option card in Slot 1 This option card contains two or four frequency outputs which are designated A B C and D 1 8 1 Preparing for Testing Prepare for the testing procedure by connecting a frequency counter to the desired output on the option card as shown in Figur
6. Startup Guide refer to Illustration 9 in Figure 9 on page 41 and complete the following steps 1 Orient the thermal heat pad s to the heat sink as shown in Figure 9 on page 41 and apply it to the heat sink 2 Loosely attach the aluminum backplate to the I O heat sink with three screws lock washers and flat washers Note The following step applies only to the TR and FR option cards Otherwise proceed to step 4 3 Ifyou have an optional heat sink bridge attach it to the I O heat sink with two screws lock washers flat washers and nuts 4 Attach the assembled heat sink by straddling the power supply components on the option card with the aluminum plate to the left inside and the heat sink to the right outside 5 Tighten the three screws step 2 to secure the aluminum backplate to the heat sink Complete the option card installation by proceeding to Assembling the Circuit Board Assembly on page 35 34 DigitalFlow XMT868i Service Manual Chapter 4 Parts Replacement 4 7 Assembling Installing the Circuit Board Assembly Most of the parts replacement procedures described in this chapter require removal of the circuit board assembly from the electronics enclosure Furthermore most of the procedures require varying degrees of disassembly of the circuit board assembly See Figure 9 on page 41 and follow the instructions in this section to assemble the circuit board assembly and or to install it in the electronics enclosure
7. the Calibration Test menu 56 DigitalFlow XMT868i Service Manual Appendix B Calibration and Testing with PanaView B 5 Testing XMT868i Software and Hardware In addition to calibration procedures for input and output cards the Calibration Test menu offers tests for XMT8681 hardware and procedures for uploading signal array data and XMT memory contents into PC files for examination To test XMT8681 hardware and software 1 Open the Meter Browser window and highlight the XMT8681 2 Expand the Edit Functions option The window now appears similar to that shown in Figure 10 on page 48 3 Double click on the Calibration Test menu The window appears similar to Figure 11 on page 48 Proceed to the appropriate section to upload data and test hardware B 5 1 Uploading Signal Array Data By uploading XMT868i signal array data for examination a user can check if the transducer signal is the proper shape and change setup parameters if necessary IMPORTANT Consult GE before using this data to change any parameters 1 Inthe Calibration Test menu double click on the Signal Array Upload option 2 Double click on the desired Channel 3 The next prompt asks for the specific Array to Load Five choices are available Raw UP Upstream Signal Raw DOWN Downstream Signal CFUNC UP Correlation Function Upstream CFUNC DOWN Correlation Function Downstream CCFUNC Cross Correlation Function Double click on the desired arra
8. 67 Warranty no content intended for this page 68 DigitalFlow XMT868i Service Manual 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 mail sensing ge com Ireland Sensing House Shannon Free Zone East Shannon County Clare Ireland Tel 353 0 61 470291 E mail gesensingsnnservices ge com An ISO 9001 2000 Certified Company www ge mcs com en about us quality html www ge mcs com 2011 General Electric Company All rights reserved Technical content subject to change without notice 910 1975 Rev F
9. Appendix B Calibration and Testing with PanaView B 5 2 Uploading XMT868i Memory Note This option is for factory use only The Upload XMT Memory option 1s another diagnostic tool IMPORTANT Consult GE before using this data to change any parameters 1 2 3 4 In the Calibration Test menu double click on the Upload XMT Memory option The first prompt shows the Hex Start Address Click Next Item The next prompt displays the value for the Hex Bytes Click Next Item PanaView now offers two options for Uploading the XMT memory f you double click on To Display the right pane of the window appears similar to Figure 15 and the data is available for immediate evaluation Click Exit Page to close the window and return to the Calibration Test menu iw CALIBRATION TEST UPLOAD NOW TO DISPLAY HEX tt BYTES 0064 HEX START ADDRESS 00000000 NUMBER OF CHANNELS 2 Channels TESTS SET HCHANS Exit Page Figure 15 XMT868i Memory Data Displayed on PanaView f you double click on To File the Save As window similar to Figure 14 on page 58 opens Enter a file name and click Save PanaView stores the array data in a Windows file and closes the Calibration Test window DigitalFlow XMT868i Service Manual 59 Appendix B Calibration and Testing with PanaView B 5 3 Testing XMT868i Hardware Using PanaView you can check crucial elements of the XMT868i hardware the EPROM and the RAM You can also set the
10. Cautionary information is also included when applicable Safety Issues WARNING Itis the responsibility of the user to make sure all local county state and national codes regulations rules and laws related to safety and safe operating conditions are met for each installation Auxiliary Equipment Local Safety Standards The user must make sure that he operates all auxiliary equipment in accordance with local codes standards regulations or laws applicable to safety Working Area WARNING Auxiliary equipment may have both manual and automatic modes of operation As equipment can move suddenly and without warning do not enter the work cell of this equipment during automatic operation and do not enter the work envelope of this equipment during manual operation If you do serious injury can result WARNING Make sure that power to the auxiliary equipment is turned OFF and locked out before you perform maintenance procedures on the equipment Qualification of Personnel Make sure that all personnel have manufacturer approved training applicable to the auxiliary equipment Personal Safety Equipment Make sure that operators and maintenance personnel have all safety equipment applicable to the auxiliary equipment Examples include safety glasses protective headgear safety shoes etc Unauthorized Operation Make sure that unauthorized personnel cannot gain access to the operation of the equipment DigitalFlow XMT868i Serv
11. Parameters Using the Keypad Program Power up the XMT868i and wait until it has initialized Press Escape Enter Escape In the Keypad Program window scroll to PROG and press Enter In the PROG menu scroll to GLOBL and press Enter Scroll to I O and press Enter Scroll to LCD and press Enter SX NS SUN RS Do Db DES The window now asks for the of LCD Parameters Scroll to the desired number from OFF through 1 4 and KEY and press Enter For a 1 Channel XMT868i the data for Channel 1 is displayed automatically and you can skip to step 9 However for a 2 Channel meter the channel data to be displayed must be specified at the following prompt DigitalFlow XMT868i Service Manual 17 Chapter 3 Diagnostics 3 2 1 Viewing Diagnostic Parameters Using the Keypad Program cont 8 Scroll to the desired Channel option as listed in Table 2 Table 2 Channel Options Channel 1 Channel 2 CH1 CH2 CH1 CH2 CH1 CH2 2 9 For each channel select the desired Measurement Parameter as shown in Table 3 on page 20 Note The measurement units that appear in these prompts are those selected in the GLOBL SYSTM menu earlier in this section Also when differences in one channel s programming invalidate an output previously chosen for the other the measurement defaults to the nearest selectable item in the parameter list The previous two prompts repeat until all of the specified of LCD Para
12. Test menu see Figure 11 on page 48 double click on the Calibration entry to open the option 2 Inthe center pane double click on Slot 0 Note The Slot 1 option only appears in the center pane if an option card has been installed in this slot DigitalFlow XMT868i Service Manual 49 Appendix B Calibration and Testing with PanaView B 3 Calibrating Slot 0 Analog Outputs cont 3 Double click on either Output A or Output B to open the Analog Output menu Output A will be used as an example in this manual IMPORTANT The procedure for calibrating Output B is identical to that for calibrating Output A However when calibrating Output B be sure to reconnect the ammeter on terminal block J1 See Figure 12 on page 49 for the correct pin numbers 4 Double click on 4 milliamps to calibrate the low end of the output range 5 Double click on 4 mA UP or 4 mA DOWN to adjust the ammeter reading UP or DOWN until a 4 mA reading is achieved or Double click on 4 mA Numer and directly enter the mA reading in the right pane 6 Once you have achieved a 4 mA reading double click on either 4 m4 STORE to store the calibration or on 4 mA ABORT to exit the menu without storing the calibration Note Ifthe ammeter reading cannot be adjusted within 5 0 uA of the 4 or 20 mA setting contact the factory for assistance 7 PanaView returns to the Analog Output window Double click on 20 milliamps and repeat steps 5 and 6 to calibrate th
13. all of the display parameters have been set up the meter returns to the Global I O window To leave the Keypad Program press the Escape key three times After leaving the Keypad Program the XMT868i will reset itself and will begin to display the parameters specified in this section If more than one parameter was set up each of the parameters will be displayed in sequence with a pause of several seconds between display changes 62 DigitalFlow XMT868i Service Manual Numerics 20 mA Option Analog Inputs 5 53 4 mA Option Analog Inputs 5 53 A Alarm Option Card Testing 0 7 Alarm Relays Testing cles rl enn 55 Ammeter in Calibration e 2 Amplitude Error E9252 212v e v Ya Bia 15 Analog Input Error ER 15 Analog Inputs 20 mA Option sted ness ate eU eR SEN 5 53 4 mA 0 75 qiu ee ed 5 53 Option Card Calibrating 4 Analog Output Error E 15 Analog Outputs Slot 0 Ammeter Readings nnana 4 50 52 As Calibrated Current Source 4 53 54 Calibrating uos us rete aaa equ cere gie 49 Linearity s cadi end a EEN 49 Resolution noaa nues qu e E Lit d is E 49 Analog Outputs Option Card Calibrating isos icona ip 2 52 53 54 Linearity osea Unten tuta a ac ence 2 52 53 54 Resolution oiv ede vette ede s 2 52 53 54 Atrow Keys MERERI AE a a 61 B Bracket Option Card 2i rv Ret EXEAT 33 C Calibrating See Parameter Name Calibration Enterin
14. data into the meter If the instructions in this section fail to resolve the problem contact GE for assistance 24 DigitalFlow XMT868i Service Manual Chapter 3 Diagnostics 3 5 2 Clamp on Transducer Problems 1 POOR COUPLING TO PIPE Clamp on transducers must be in close contact with the pipe Make sure the pipe wall is smooth and generally free of paint The couplant material must fill voids between the transducer and the pipe and must be firmly coupled or bonded to both the pipe and the transducer The pipe and transducer must be clean and dry for permanent couplant such as grease or epoxy to adhere properly Enough pressure must be applied to the transducer by its clamp to hold it firmly against the pipe MISALIGNMENT The transducer transmits relatively narrow beams of ultrasound therefore transducer alignment is critical to assure that the beam can travel from one transducer to the other without undue attenuation Be sure to exactly follow the instructions that came with your transducers and clamping fixtures Also be sure that the transducer spacing agrees with the calculated spacing S INTERNAL DAMAGE Ultrasonic transducers consist of a ceramic crystal bonded to the transducer case The bond between the crystal and the case may be damaged by extreme shock and by temperature extremes The crystal itself can also be damaged by the same conditions The internal wiring can be corroded or shorted if contaminants enter
15. is inserted too far into the enclosure it cannot be rotated properly 3 Attach the loose end of the green grounding jumper wire to the enclosure with the mounting screw flat washer and lock washer previously removed Be sure to install the metal label plate under this screw Refer to Illustration 2 4 From the rear of the enclosure connect the power line leads to terminal block TB5 Plug the connectors back into terminal blocks J1 J4 If necessary see Chapter 1 nstallation of the Startup Guide for detailed wiring instruction 5 Install the front and rear covers on the electronics enclosure and secure them in place with the set screws provided Refer to Illustration 1 The Model XMT868i is now ready to be placed back into service Before taking measurements with the Model XMT58681 refer to Chapter 2 Initial Setup of the Startup Guide and Chapter 1 Calibration of this 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 any parts replacement performed on the Model XMTS868i in Appendix A Service Record To purchase the parts mentioned in this chapter or any items not specifically discussed contact the factory for assistance To make sure the proper components are obtained be sure to specify the serial number of the Model XMT868i at the time of purchase DigitalFlow XMT868i Service Manual 37 Chapter 4 Parts Replacement n
16. lock washer flat washer and bracket nut on the back side Then carefully pull the terminal board away from the main board power supply board assembly and option board 4 Remove the two screws flat washers lock washers and heat sink in the corners of the power supply board see Illustration 8 in Figure 8 on page 40 Note A XMT666i with a DC power supply will include two more mounting screws but no heat sink 5 Carefully pull up the power supply board and heat sink assembly then slide it out The U6 EPROM is located along the upper edge of the main board on the side that was facing the power supply board see Illustration 8 in Figure 8 on page 40 It is the only socketed chip on this board and it has a white identification label 6 Usinga 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 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 7 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 8 By applying equal pressure on all four corners gently press the EPROM into
17. return to the Slot 1 window and calibrate additional inputs outputs or press Escape again to close the CALIB menu DigitalFlow XMT868i Service Manual 5 Chapter 1 Calibration 15 Calibrating RTD Inputs RTD analog inputs may be added to the XMT868i by installing an appropriate option card in Slot 1 The option card contains two or four RTD inputs that are designated as A B C and D Both the set point and slope point values for each input must be specified prior to use 1 5 1 Preparing for Calibration Prepare for the calibration procedure by connecting the RTD temperature transmitter to the desired input A B C or D on the option card See Figure 4 on page 12 to identify the RTD and COM pins for the desired input on terminal block J2 1 5 2 Accessing the Calibration Test Menu 1 From the Keypad Program press the right arrow key to scroll to the CALIB menu Press Enter 2 Inthe Cal window scroll to Slot 1 Press Enter Note The Slot 1 option only appears at the above prompt if an option card is installed in this slot 3 Scroll to the desired Jnput Input A will be used as an example in this manual Press Enter IMPORTANT When calibrating the other inputs be sure to reconnect the current source at terminal block J2 See Figure 4 on page 12 for the correct pins 1 5 3 Entering the Set Point 1 Before proceeding place the RTD in a temperature bath and allow it to stabilize at the desired set point temper
18. the socket until it is fully seated Do not strike the EPROM or apply excessive force during this procedure Complete the User Program replacement by proceeding to Assembling the Circuit Board Assembly on page 35 32 DigitalFlow XMT868i Service Manual Chapter 4 Parts Replacement 4 6 Installing an Option Card The Model XMT868i flowmeter can accommodate up to two option cards A data logging or communication card may be installed in Slot 2 and a variety of I O option cards are available for installation in Slot 1 To install an option card refer to Illustrations 9 10 and 11 in Figure 9 on page 41 and complete the following steps 1 Complete the steps in the Removing the Circuit Board Assembly section on page 28 and page 29 2 Remove the terminal board from the main board power supply board subassembly by completing Steps 1 3 in Replacing the User Program on page 32 3 Remove the screw from the angle bracket on the main board as shown in Illustration 11 in Figure 9 on page 41 Note Do not lose the nylon washer located between the small angle bracket on the terminal board and the main board 4 Ifnecessary remove any option card and optional I O heat sink currently in use 5 There is a 36 pin connector P2 and a 30 pin connector P1 on the rear of the interconnect board The option cards must be plugged into these connectors a To install a data logging or communication option card into Slot 2 orient the option car
19. the transducer housing PHYSICAL DAMAGE Transducers may be physically damaged by dropping them onto a hard surface or striking them against another object Usually the connector on the transducers is the part that is damaged as it is the most fragile Minor damage may be repaired by carefully bending the connector back into shape If the connector cannot be repaired replace the transducers IMPORTANT Transducers must be replaced in pairs Refer to Chapter 2 Initial Setup of the Startup Guide to program 5 the new transducer data into the meter CYCLE SKIP CONDITION A cycle skip is usually caused by a distorted or altered signal due to poor couplant bad wall or unusual fluid disturbances To resolve a cycle skip recouple both transducers with proper couplant Check your couplant for temperature ranges In addition make sure the pipe wall is free of paint and rust Contact GE if you cannot solve a transducer related problem DigitalFlow XMT868i Service Manual 25 Chapter 3 Diagnostics no content intended for this page 26 DigitalFlow XMT868i Service Manual Chapter 4 Parts Replacement Chapter 4 Parts Replacement 4 1 Introduction The Model XMT868i has been designed to permit easy on site upgrades and parts replacement See Figure 7 on page 39 for details of the standard XMT868i electronics enclosure assembly The instructions in this chapter along with a few common tools are all that is required to perform
20. 12 to identify the NO NC and COM pins for the desired alarm on terminal block J2 1 6 2 Testing the Relay 1 From the Keypad Program press the right arrow key to scroll to the CALIB menu Press Enter 2 Inthe Cal window scroll to Slot 1 Press Enter Note The Slot 1 option only appears at the above prompt if an option card is installed in this slot 3 Scroll to the desired Output Output A will be used as an example in this manual Press Enter IMPORTANT The procedure for testing all the alarms is the same However when testing a different output be sure to reconnect the ohmmeter at terminal block J2 See Figure 4 on page 12 for the correct pin numbers 4 Dooneofthe following Press Enter on Close The ohmmeter should yield a reading of about zero Press Enter on Open The ohmmeter should yield an infinite reading Note To test the NC relay position move the ohmmeter lead from the NO pin to the NC pin and repeat the above test In this case the ohmmeter readings will be infinite when Close Alarm is selected and zero when Open Alarm is selected 1 6 2a Procedure Options This completes testing of the Slot 1 alarm relays Do one of the following To test the normally open and normally closed contacts for another alarm relay return to Step 3 in Testing the Relay above To calibrate test additional inputs outputs proceed to the appropriate section To leave the Keypad Program press Escape twice Dig
21. 19 HART RI HARTIOUT A HARTIOUT A C C C C RTD A COMM A COM A OUT D 24V INPUT D INPUT D RTN NOTE R RTD Input A Standard Alarm H Hermetic Alarm F Frequency Output T Totalizer Output Current Input C Current Output O Blank No Connection Chapter 1 Calibration Figure 4 Option Card I O Connections 12 Chapter 2 Error Codes Chapter 2 Error Codes 2 1 Introduction The Model XMT868i ultrasonic flow transmitter 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 enclosure the transducers or the flowcell the LCD backlight flashes to signal errors If the backlight is off when an error is detected the display is illuminated briefly if the backlight is already on the light is interrupted briefly A built in error code message system greatly simplifies the troubleshooting process All of the possible Model XMT868i 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 in the LCD and or PanaView data display screen as shown in Figure 5 Error Message c x CH1 MASS Exx 4500 LB HR XMT868i LCD Display t Error Message Figure 5 Error Messag
22. 2 to remove the front cover 28 DigitalFlow XMT868i Service Manual Chapter 4 Parts Replacement 4 2 Removing the Circuit Board Assembly cont 4 From the rear of the enclosure disconnect the power line leads from terminal block TB5 Unplug terminal blocks TBI to TB6 from connectors J1 J4 5 Referto Illustration 2 in Figure 7 on page 39 and remove the four terminal board mounting screws and the ground screw This will disconnect one end of the green grounding jumper wire and the label plate with the ground symbol will come loose from beneath it IMPORTANT Each screw will have a flat washer and a lock washer over it Be careful not to lose these washers 6 Carefully rotate the circuit board assembly counterclockwise about 20 until the five bosses in the enclosure are visible through the slots along the circumference of the terminal board Then slowly push the circuit board assembly through the enclosure and remove it from the front of the enclosure Refer to Illustration 3 in Figure 7 on page 39 Bring the circuit board assembly to a clean safe work area and proceed to the appropriate section of this chapter to perform the desired service procedure DigitalFlow XMT868i Service Manual 29 Chapter 4 Parts Replacement 4 5 Replacing the LCD Display Interconnect Board Subassembly The LCD display normally provides years of dependable service but it is easily field replaceable when necessary To replace the LCD dis
23. 4 7 1 Assembling the Circuit Board Assembly If the circuit board assembly has been disassembled to any degree complete the steps below Otherwise proceed directly to Installing the Circuit Board Assembly on page 37 See Figure 9 on page 41 and complete the following steps 1 Ifnecessary replace the angle bracket on the main board insert the screw with flat washer and lock washer and screw it into the standoff on the main board See Illustration 11 in Figure 9 on page 41 IMPORTANT The small angle bracket on the terminal board must be positioned on the outside of the main board with the previously removed nylon washer between them 2 Face the User Program side of the main board toward the rear of the power supply board Orient the boards so that the pins along the bottom of the main board align with connectors J2 and J6 on the power supply board and push the two boards firmly together Note Ifthe thermal gap filler pad of the power supply board has been damaged you must remove and replace it before reinserting the power supply board First remove and discard the damaged pad Then remove the blue protective liner from the new pad and apply it with the white face against the power supply board 3 Secure the power supply board and heat sink to the main board by reinstalling the screws flat washers and lock washers previously removed from the corners of the power supply board See Illustration 11 in Figure 9 on page 41 4 Refer back t
24. Board white surface l facing the Bridge VO Heatsink Gap Filler white surface surface facing PCB facing the I O Heatsink Standoff Back Plate Le EA J2 Connector on J5 Connector on Main Board e FUE daia UO Board Z z II K HI n Wa X J6 Connector on Bracket Screw N RT Power Supply Illustration 9 Nylon Washer Standoff aana a s Ke Keypad Board Screw with Washer Assembly 2 places Sal v ee Oe Seen a m Interconnect Board l 7 l VO Board Slot 1 d uu Y Flat Washer amp Xr Hn P with Heatsink i Main Board P1 Connector on Interconnect Board Figure 9 Model XIMIT868i I O Option Card Subassembly Lock Washer x EN icem J2 Connector on J1 Connector on I O Board Option Board Slot 2 Slot 1 with Heatsink P2 Connector on Interconnect Board Screw Standoff Illustration 11 Slot 2 Option Board Illustration 10 DigitalFlow XMT868i Service Manual 41 Appendix A Service Record Appendix A Service Record A 1 Introduction Whenever any service procedure is performed on the Model XMT868i flow transmitter 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 and detailed service data for the Model XMT8681 in Table 6 Make additional copies of the table as needed Table 6 Service Record Description of Service
25. CD Display and P6 Connector J1 Connector Interconnect Board male female Mounting Screw with Washer Assembly Illustration 5 3 places Illustration 7 J7 for AC Power Supply shown J2 Connector Bracket Screw P8 Connector on Terminal Board connects to J8 Connector on Main Board P21 Connector on Terminal Board connects to J3 Connector on Option Board Slot 2 P22 Connector on Terminal Board connects to P2 Connector on I O Option Board Slot 1 Bracket Nut Washer and Lock Washer J6 for DC Power Supply DigitalFlow XMT868i Service Manual Chapter 4 PartsReplacement Fuse Cover DC Power Supply Board Illustration 6 l Heatsink V4 for AC Power Supply only Screw Lock Washer and Flat Washer 2 places Gap Filler for AC Power Supply only AC Power Supply Assembly Main Board U6 Eprom Illustration 8 shown with AC Power Supply Note There are no Heat Sink and Gap Fillers with a DC Power Supply Figure 8 Model XMT868i LCD Display Interconnect Board Subassembly 40 Chapter 4 PartsReplacement Screw with Washer Assembly UO Heatsink Bridge d and Mating Nut not shown EN SR 2 places Gap Filler N 3 white surface N AOST UL J facing the Bridge zl Al 3 Screw Lock Washer and p qu c 4 Flat Washer 2 places Power Supply Heatsink Screw with Washer Assembly 3 places c a Gap Filler lt a X EN Power Supply
26. D RTN 15 FHII A FREQ OUT A FREQ RTI ANC B ALARM NO B ALARM COM B ALARM NC C 24 OU C ANALOG C ANALOG D 24v OU D ANALOG D ANALOG 04 FA FH TA TH CA CH Pin 1 OMAN DOF C Iv ws K N o GOAN DO E GO Iv ae dm as M o 16 HART HARTIOUT A HARTIOUT A C C5 C O C CO CO Z C5 CH QU RT T A 17 HART OI 05 CI TL FI OUT A RIN A NC OUT B RIN B NC OUTC 24V NPUTC INPUT C RTN OUT D 24V INPUT D INPUT D RTN 11 AR HR ALARM A NO ALARM A COM ALARMA NC ALARM B NO ALARM B COM ALARM B NC RID C COMM C COM C RID D COMM D HARTIOUT A HARTIOUT A QUT C 24V INPUT C INPUT D RTN OUT D 24V NPUT D INPUT C RTN COM D 18 F F HH A FREQ OU ANC B FREQ OU B FREQ RT B NC C ALARM C ALARM Set et O OO OD JO Om HW I A FREQ RTN C ALARM COM D ALARM NO D ALARM COM T 0 C N D ALARM C 06 CR FR TR Pin 1 OO OO Jo Oo FW I Gh 164 M o Pin 1 seht Zelt O OO OD JO Om E Oo nm no DUT A 12 Il c UTA MV 9 UT A RTN UTB 24V UTB UTB RTN UTC 24V rr TC RTN UTD 24V UTD UTD RTN D e n
27. E 53 BAS HR ul 54 BAA Testing ALT Relay uoi Ciccio DERE euro andes feel bi bites breui fied tose ct 55 BAS Testing Totalizer OUTPUTS irena TE el inta dob o d A AE oni E vos aS GENE ANE 56 B 4 6 Testing Frequency Outputs 2 nn nnn en hehe hehehe hene 56 Testing XMT868i Software and Hardware ous eret lire o ede depo Love c e cita 57 BR Uploading Signal Array Data EE 57 B 5 2 Uploading XMT868i MIO 4i os oo chen D S ceed UE a etx deg eid edad QURMFI Sd 59 B 5 3 Testing XMT868i HOrdWwares Lee ns e oe ed py ITF RU oboe ar Pee FL eR PRU 60 Appendix C Factory Tests miror a PM PEPPER 61 Resetting the Number of Chahtiels eet 61 Resetting the XMT868i to Factory Defaults Ee wh Sah o octets ado cs e dendo to PROMO GOYA 61 DigitalFlow XMT868i Service Manual Preface Information Paragraphs Note paragraphs provide information that provides a deeper understanding of the situation but is not essential to the proper completion of the instructions Important paragraphs provide information that emphasizes instructions that are essential to proper setup of the equipment Failure to follow these instructions carefully may cause unreliable performance Caution paragraphs provide information that alerts the operator to a hazardous situation that can cause damage to property or equipment Warning paragraphs provide information that alerts the operator to a hazardous situation that can cause injury to g paragraphs p p jury personnel
28. ENU 7 CALIBRATION TEST 1 PAUSE MEASUREMENT Figure 10 Menus in the Edit Functions Option 5 To enter data into the user program double click on the Calibration Test menu The window appears similar to Figure 11 w CALIBRATION TEST Calibration Signal array upload Upload X MT memory Hardware test Figure 11 The Calibration Test Menu Proceed to the appropriate sections of this chapter to calibrate and or test any of the installed inputs and or outputs 48 DigitalFlow XMT868i Service Manual Appendix B Calibration and Testing with PanaView B 3 Calibrating Slot 0 Analog Outputs Every Model XMT868i flowmeter includes two built in analog outputs A and B at terminal block J1 which is designated as Slot 0 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 nA 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 calibration by inserting an ammeter in series with the load on analog output A at terminal block J1 as shown in Figure 12 Terminal Block J1 Slot 0 Ammeter Figure 12 Ammeter Connection Output A 1 From the Calibration
29. GE Measurement amp Control Solutions Flow DigitalFlow XMT868i Panametrics Ultrasonic Flow Transmitter for Liquids 1 amp 2 Channel Service Manual S k 910 1715 Rev F Imagination at wor September 2011 DigitalFlow XMT868i Panametrics Ultrasonic Flow Transmitter for Liquids 1 amp 2 Channel Service Manual 910 1715 Rev F September 2011 WWW ge mcs com 2011 General Electric Company All rights reserved Technical content subject to change without notice no content intended for this page Contents Chapter 1 Calibration STO Rs 01 EUO Ne Soa ve cue qu deron dE AT AES ARO eA MU E DE MU CFA ME Ca SEDE 1 L2 Accessing the e leie EE E 1 1 3 Calibrating and Testing Analog OUELIEe etae d eb ade teri be Sa elder ere EDU ditte bh o ut 2 131 Preparing eelere Te EE 2 1 3 2 Calibrating the Low End of the Output Raps csse ean scs paco ar docto dol erg docto b RN e ACUMEN 3 1 3 3 Calibrating the High End of the Output Rage cx e ek ede He et Nee AN ee 3 1 54 Testing QUtpUE Ere drlty os Lo em tle te tees et ee s een 3 EA Calibrating Andog ee EE 4 E Eege eeler ET EE 5 1 4 2 Accessing the Calibration Test Menu satia aa o PE E SEU Vlt able b Weasel AGA CR alas t vd 5 1 5 Galibrating RTO INPUTS cuo itta chs ese rta ads tte e p stet dte ew E decal tnis sq Peace a at date utat E UR deae 6 1S d Prepara Tor EEN cet severance caseo d a e E EE 6 1 5 2 Accessing the Calibration Test Men EE 6 L5 Ente
30. Note The Calibration menu never returns to the Keypad Program Pressing Escape to exit the menu causes the XMT868i to restart DigitalFlow XMT868i Service Manual 1 Chapter 1 Calibration 13 Calibrating and Testing Analog Outputs Every Model XMT868i flowmeter includes two built in analog outputs A and B at terminal block J1 which is designated as Slot 0 Additional analog outputs may be added to the Model XMT868i by installing an appropriate option card in Slot 1 This option card contains two analog outputs which are also designated as A and B Before beginning calibration an ammeter must be connected to the desired analog output Both the zero point and full scale values for all of these outputs must be calibrated After calibrating the outputs which have a resolution of 16 0 nA 0 1 full scale their linearity should be tested Note The zero point of the analog output may be set at either 0 mA or 4 mA However the calibration always uses the 4 mA point as the meter extrapolates this value to obtain the 0 mA point 1 3 1 Preparing for Calibration Prepare for calibration by inserting an ammeter in series with the load on the desired output Refer to Figure 1 and Figure 4 on page 12 to identify the OUT and RTN pins for the desired output Terminal Block J1 Slot 0 Ammeter Figure 1 Ammeter Connection Output A 2 DigitalFlow XMT868i Serv
31. Performed By DigitalFlow XMT868i Service Manual 43 Appendix A Service Record Table 6 Service Record cont Description of Service Performed By 44 DigitalFlow XMT868i Service Manual Appendix A Service Record Diagnostic Parameters After a successful initial installation of the Model XMT8681 and whenever any system malfunction is noticed the values for the diagnostic parameters should be entered in Table 7 Table 7 Diagnostic Parameters Parameter UP Sig Strength Initial Current Parameter UP Amp Discrim Initial Current DN Sig Strength DN Amp Discrim Soundspeed UP Peak UP Transit DN Peak DN Transit UP Norm Factor DAC up DN Norm Factor DAC do CEE1 DeltaT Reynolds number Supply Temp Return Temp K RE Supply Rtn PEAK Supply Dens Theta 32 Return Dens UP Signal Q Delta h DN Signal Q available only for Clamp on transducers available only if Energy ON DigitalFlow XMT868i Service Manual 45 46 no content intended for this page DigitalFlow XMT868i Service Manual Appendix B Calibration and Testing with PanaView Appendix B Calibration and Testing with PanaView B 1 Introduction Calibrating the Model XMT868i s analog outputs and inputs is explained in this
32. Problems x2 arvo atm REOR RI RR Rd 24 Replacement oc o rag dre RE ES 24 25 U Uploading Signal Array Daa 57 XMT EE 59 User Program EPROM 43 SERES Per Sed 32 Uparading o loves t Da qd x ceu bp ve Piu 32 V Velocity Range Error E3 are EA ae Ren 14 Volumetric Overflow Error E13 15 W Warranty ees dito obi ge pei orm Re E AP 67 DigitalFlow XMT868i Service Manual Index 65 Index no content intended for this page 66 DigitalFlow XMT868i Service Manual Warranty Warranty Each instrument manufactured by GE Sensing 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 Sensing Fuses and batteries are specifically excluded from any liability This warranty is effective from the date of delivery to the original purchaser If GE Sensing determines that the equipment was defective the warranty period is one year from delivery for electronic or mechanical failures one year from delivery for sensor shelf life If GE Sensing 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 Sensing the repairs are not covered under this warranty The warranties set forth herein are exclusive and are in lieu of all other warr
33. acement procedures for the Model XMT868i require the removal of the circuit board assembly from the electronics enclosure Therefore complete the instructions in this section before attempting any other service tasks The Model XMT868i circuit board assembly consists of circular front and rear circuit boards with several rectangular circuit boards sandwiched between the circular end boards and oriented perpendicular to them Specifically some or all of the following circuit boards may be included in the assembly FRONT BOARDS LCD Display Interconnect Board Subassembly REAR BOARD Terminal Board MIDDLE BOARDS Main Board Receiver Board S Power Supply Board Slot 1 Input Output Card optional Slot 2 Logging or Communication Card optional To disassemble the circuit board assembly refer to Figure 7 on page 39 and complete the following steps 1 Disconnect the power to the XMT868i and move the electronics enclosure to a safe area Note Ifthe electronics enclosure cannot be moved to a safe area be sure the surrounding area is free of ignitable gases before proceeding to step 2 WARNING The main power to the Model XMT868i must be disconnected before proceeding 2 Referto Illustration 1 in Figure 7 on page 39 Loosen the set screw on the rear cover Place a rod or long screwdriver across the cover in the slots provided and rotate the cover counterclockwise until it comes free from the enclosure 3 Repeat Step
34. aig Sutin Moat EIU 40V qu a ledge vt 22 Jl REID TT 23 Fluid Physical Requirements onono y ers 22 Problemsiz ig es Tacit as ech og eae dera dicm ds 22 Soundspeed is ss t e ee a 22 Frequency Option Card Testing 10 63 Index Frequency Outputs Testing 56 F se Replacing e cerro bed ad ce D eens ed 31 H Hardware Test os esses Siva vae seit S ee 60 l LO Option Card Subassembly 41 Input Connections 3 4a uds rx d dr e 12 Inputs 20 mA Eege tre ta Rope Ra 5 53 4MA ODIUON eceng or Ra uA pe Dates e qe eae 5 53 Interconnect Board Subassembly 40 K Keypad Program for Calibration l L LCD Display Replacing 6 od used Eit du ons 30 Subassembly erus RO otn d beu 40 Leaks Transducers 00000000 cece eee 24 Low Signal Error El aiv rl See a 14 LV D Statement koa edd fae oy RUE ea ak 27 M Memory Data Uploading 0005 59 Menu Map Calibration e 11 N No DE ce ere eee Stel editas 14 64 O Option Card Alarm Relays ccena ea a VS 7 Analog Inputs ess Sates eS v Ie ra sis 4 Analog Outputs naase nananana 2 52 53 54 Brack ti scs outta bea Nub LA EE 33 Calibrating 223 8 Boe nEE RR K ERES 51 Expansion Slots 23 4 Pale dI ea hag 1 47 Frequency Outputs feds Kee AA 10 TO Connections estie Tue eau eed ors 12 UO Subassembly aa ce ares 41 Jastalling A ad up ao osa a a rst UE ATR 33 WT lint aee ER ded ER S a 6 To
35. ailure 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 inaccurate 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
36. and repeat steps 5 and 6 to calibrate the high end of the output range Note Skip the following prompt if linearity testing of the output will not be performed at this time 1 3 4 Testing Output Linearity 8 Scroll to TEST to test the linearity of the currently selected analog output Press Enter 9 Check the ammeter reading at 50 Full Scale Then use the arrow keys to enter a different Full Scale 0 100946 Press Enter when done DigitalFlow XMT868i Service Manual 3 Chapter 1 Calibration 1 3 4 Testing Output Linearity cont Table 1 lists the expected ammeter readings at various 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 Table 1 Expected Ammeter Readings Full Scale 4 20 mA Scale 0 20 mA Scale all ammeter readings should be 0 016 mA If the linearity test readings are not within 16 uA of the values listed in Table 1 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 10 Scroll to EXIT and press Enter to return to the Cal menu Then choose another output to calibrate or press Escape to leave the CALIB menu This completes calibration of the Slot 0 analog outputs Proceed to the appropriate section to calibrate additional inputs o
37. anties whether statutory express or implied including warranties or merchantability and fitness for a particular 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 Notify GE Sensing 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 Sensing will issue a RETURN AUTHORIZATION NUMBER RAN and shipping instructions for the return of the instrument to a service center will be provided 2 If GE Sensing 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 Uponreceipt GE Sensing will evaluate the instrument to determine the cause of the malfunction Then one of the following courses of action will then be taken Ifthe damage is covered under the terms of the warranty the instrument will be repaired at no cost to the owner and returned f GE Sensing 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 DigitalFlow XMT868i Service Manual
38. ature 2 Scroll to Set to program the RTD set point Press Enter 3 Use the arrow keys to enter the desired set point temperature and press Enter 4 Scroll to STORE to accept the new set point value or ABORT to cancel the entry Press Enter 1 5 4 Entering the Slope 1 Scroll to Slope to program the RTD slope point Press Enter 2 Use the arrow keys to enter the desired slope point temperature and press Enter 3 Press STORE to accept the new slope point value or ABORT to cancel the entry Press Enter Note Ifan error message appears verify that the RTD is at the programmed temperature Also if you replace the set slope range with a different range be sure to recalibrate the set and slope points 1 5 4 Procedure Options This completes calibration of the Slot 1 RTD input Do one of the following To calibrate or test another input press Escape and return to Step 3 in Accessing the Calibration Test Menu To leave the Keypad Program press Escape twice 6 DigitalFlow XMT868i Service Manual Chapter 1 Calibration 1 6 Testing Alarm Relays Alarm relays may be added to the Model XMT868i by installing an appropriate option card in Slot 1 This option card contains two or four alarm relays which are designated A B C and D 1 6 1 Preparing for Testing Prepare for the testing procedure by connecting an ohmmeter to the NO and COM pins of the desired alarm on the option card Refer to Figure 4 on page
39. carefully check the transducer and cables for damage after the leak has been repaired 2 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 face If corrosion is suspected remove the transducer from the flowcell and carefully inspect the electrical connector and the transducer face for roughness and or pitting Any transducer damaged in this manner must be replaced Contact GE for information on transducers in materials suitable for the application 3 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 4 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 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 transducer must be replaced IMPORTANT Transducers must be replaced in pairs Refer to Chapter 2 Initial Setup of the Startup Guide to program the new transducer
40. ce Manual Appendix C Factory Tests Appendix C Factory Tests C 1 Introduction For user security the XMTS8681 offers two special functions in a separate menu selection of single or dual channel operation and the factory default reset While the first function enables you to reset the channel configurations set during manufacturing the reset function by restoring the meter to its original state allows you to purge potential errors in program memory To enter the FACTORY TEST menu press Escape followed in succession by the up arrow key A the right arrow key OI the down arrow key V the left arrow key 1 the up arrow key again forming a loop around the keypad and finally the Enter key The screen displays FACTORY TEST as shown below FACTORY TEST CHAN 1 lt C 2 Resetting the Number of Channels To reset the number of channels displayed 1 Inthe Factory Test menu scroll to CHAN and press Enter 2 Scroll to the desired number of channels 1 or 2 and press Enter 3 The XMT868i returns to the Factory Test menu Press Escape to return to parameter display C 3 Resetting the XMT868i to Factory Defaults 1 In the Factory Test menu scroll to INIT and press Enter 2 The screen displays the initial string ESKEO Use the left and right arrow keys to move among characters and the up and down arrow keys to alter each character until the string is FRIG plus the number
41. chapter In addition testing the optional totalizer frequency and alarm relay outputs and XMT hardware and software is discussed The chapter includes the following specific topics calibrating the Slot 0 analog outputs calibrating option card analog outputs calibrating option card analog inputs and RTD inputs testing option card alarm relays testing option card totalizer and frequency outputs uploading XMT868i signal array data and memory data testing the EPROM and RAM setting the number of channels The Model XMT868i electronics enclosure includes one slot for installation of an input output option card This slot is designated as Slot 1 and a variety of option cards are available In addition every Model XMT868i flowmeter includes two built in analog outputs A and B at terminal block J1 which is designated as Slot 0 Note Convention in this manual identifies any expansion slot as Slot X where X is a number from 0 2 Slot 2 is used only for data logging or communication option cards See Chapter 1 nstallation and Appendix B Data Records in the Startup Guide for a complete description of the available option cards and the procedures for wiring them B 2 Accessing the Calibration Test Menu The Calibration Test menu is accessed with PanaView software Use this menu to calibrate and test the Slot O analog outputs as well as to calibrate and or test any option cards that are installed in expansion Slot X Refe
42. ck on the Text Display option Note The Text Display window that appears after Step 2 is actually stacked on top of any previously opened windows such as the Meter Browser window 5 Using the Window menu arrange the open windows in the desired format For this discussion Figure 6 shows the Text Display window in its maximized full screen size IiPanaview Text Display Dy File Edit View Output Window Help ay amp My Computer MELANCEL 7 e Untitled IDM Com 1 ge This is an XMT Interval E Sec Continuous Get Once Network My Compute MELANCEL Untitled IDM Com 1 This is anXMT Channel 1 Thursday June 24 2004 10 56 37 0PC Logs Running Ens 0 Figure 6 The Text Display Window Note Figure 6 has been compressed both vertically and horizontally for improved clarity 6 The left pane of the Text Display window contains the standard PanaView network tree Expand this tree as far as necessary and double click on the desired process parameter to display it in the right pane of the window Table 3 on page 20 lists the available diagnostic parameters The second column in the table shows the parameter as it appears in PanaView DigitalFlow XMT868i Service Manual 19 Chapter 3 Diagnostics Keypad Parameter Choice PanaView Parameter Choice UP Sig Strength Table 3 Available Diagnostic Parameters Description Signal strength for the upstream transducer 50 or 75
43. correct any programming errors Refer to Chapter 3 Diagnostics to correct any flowcell and or transducer problems E3 Velocity Range Problem Cause Action The velocity exceeds the limits programmed in the SETUP SIGNAL 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 Chapter 1 Programming Site Data in the Programming Manual for details Refer to Chapter 3 Diagnostics to correct any flowcell and or transducer problems E4 Signal Quality Problem Cause Action 14 The signal quality is outside the limits programmed in the SETUP SIGNAL submenu of the User Program The peak of the upstream or downstream correlation signals has fallen below the correlation peak limit as set in the SETUP SIGNAL submenu This 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 DigitalFlow XMT868i Service Manual Chapter 2 Error Codes E5 Amplitude Error Problem The signal amplitude exceeds the limits programmed in the SETUP SIGNAL submenu of the User Program Cause Solid or liquid particula
44. d so that its 36 pin connector is positioned over connector P2 on the interconnect board Then firmly seat the card into its connector When properly installed the side of the option card with the 36 pin connector must face the center of the interconnect board and the edge of the option card must not overhang the edge of the interconnect board b To install an O option card with optional heat sink into Slot 1 orient the option card so that its 30 pin connector is positioned over connector P1 on the interconnect board Then firmly seat the card into its connector When properly installed the side of the option card with the 30 pin connector must face away from the center of the interconnect board and the edge of the option card must not overhang the edge of the interconnect board However the optional heat sink will extend beyond the edge Note To attach an optional heat sink to an I O option card see page 34 When the XMT868i includes both an I O board Slot 1 and an option board Slot 2 the two boards must be attached to each other with the hardware shown in Illustration 10 in Figure 9 on page 41 Pre attach the nylon washer to the screw before inserting the boards into the assembly DigitalFlow XMT868i Service Manual 33 Chapter 4 Parts Replacement 4 6 1 Attaching an Optional Heat Sink to an I O Option Card If you need to attach an optional heat sink to an I O option card the TI TR FI or FR options in Appendix B of the
45. e 2 on page 8 See Figure 4 on page 12 to identify the OUT and RTN pins for the desired output on terminal block J2 1 8 2 Testing the Output 1 From the Keypad Program press the right arrow key to scroll to the CALIB menu Press Enter 2 Inthe Cal window scroll to Slot 1 Press Enter Note The Slot 1 option only appears at the above prompt if an option card is installed in this slot 3 Scroll to the desired Output Output A will be used as an example in this manual Press Enter IMPORTANT The procedure for testing all the outputs is the same However when testing another output be sure to reconnect the frequency counter at terminal block J2 See Figure 4 on page 12 for the correct pins 4 Enter a frequency between 1 and 10 000 Hz and press Enter 5 Verify that the frequency counter reads the correct value 1 8 2a Procedure Options This completes testing of the Slot 1 frequency outputs Do one of the following To test another of the available frequency outputs return to Step 3 in Testing the Output above If any of the frequency outputs fails the test contact the factory for assistance To calibrate test additional inputs outputs proceed to the appropriate section To leave the Keypad Program press Escape twice 10 DigitalFlow XMT868i Service Manual Chapter 1 Calibration KEYPAD PROGRAM prog H See Programming Manual Reset Totals
46. e Locations If an error message appears on the display screen during operation of the Model XMT868i refer to the appropriate section of this chapter for instructions on how to proceed DigitalFlow XMT868i Service Manual 13 Chapter 2 Error Codes E0 No Error Problem No error condition currently exists Cause This message appears briefly to confirm that the response to another error message has corrected the problem Action No action is required E1 Low Signal Problem Cause Action Poor ultrasonic signal strength or the signal exceeds the limits entered using 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 value in the SETUP SIGNAL submenu of the User Program Using the procedures in Chapter 3 Diagnostics check the components listed above Also check the value entered into the SETUP SIGNAL submenu as described in Chapter 1 Programming Site Data of the Programming Manual E2 Sound Speed Error Problem Cause Action The sound speed exceeds the limits programmed in the SETUP SIGNAL submenu of the User Program The error may be caused by incorrect programming poor flow conditions or poor transducer orientation Compare the measured sound speed to tabulated nominal values for the fluid being used and
47. e high end of the output range Note Skip the following prompt if linearity testing of the output will not be performed at this time 8 Double click on Test to test the linearity of the currently selected analog output 9 Check the ammeter reading at 50 output Then enter a different output 0 100906 and double click on percent Check the ammeter reading at this setting and click Exit Page when done Table 8 on page 51 lists the expected ammeter readings at various 6 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 50 DigitalFlow XMT868i Service Manual Appendix B Calibration and Testing with PanaView B 3 Calibrating Slot 0 Analog Outputs cont Table 8 Expected Ammeter Readings 96 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 8 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 10 Double click on Exit Function to return to the Calibration menu Then choose another output to calibrate or click on Exit Page to leave the Calibration Test menu This completes calibration of the Slot 0 analog outputs Proceed to the appropriate section t
48. e keypad board to the interconnect board with the two screws flat washers and lock washers previously removed Firmly insert and seat the complete assembly by aligning the P4 connector on the interconnect board to the J4 connector on the main board and the P1 and P2 connectors to any option card as applicable Replace the three screws removed in step 2 while referring back to Illustration 4 in Figure 8 on page 40 Complete the LCD display interconnect board subassembly replacement by proceeding to Installing the Circuit Board Assembly on page 37 30 DigitalFlow XMT868i Service Manual Chapter 4 Parts Replacement 4 4 Replacing the Fuse Note This procedure applies only to the fuse on the DC power supply The fuse on the AC power supply is not field replaceable please consult the factory for replacement If it has been determined that the fuse in the XMT868i has been blown complete the following steps to install a new fuse 1 Complete the steps in Removing the Circuit Board Assembly on page 28 and page 29 2 Place the circuit board assembly on its side with the terminal board on the left and the interconnect board on the right Rotate the assembly until the power supply board is facing upward 3 Locate the fuse along the left side of the power supply board just below the terminal board refer to Illustration 6 in Figure 8 on page 40 4 Pull the plastic cover off the fuse holder and remove the old fuse 5 Obtain a
49. g Menus euo dee S e abere tuts 47 Mei Mate cd ade or teer edoldue vt peck vd 11 with Keypad Program eee 1 Calibration Test Menu n nona nanananaa 1 47 Channels Resetting the Number of 6l Setting the Number EE 60 Corrosion Transducers 24 Cycle Skip Acceleration Error E6 15 DigitalFlow XMT868i Service Manual Index D Defaults Resetting Meter to 61 Diagnostic Parameters Initial Values ts A tet st d eae trea 21 TABI DTP 19 Table of Values iua se Fatecs eque RS RSUP Pere 45 Diagnostics Menu Entering sud NEEN 17 Display LCD Replacing o on nanunua 30 Display Screen Error Messe oe casa icr ia e cu ot 13 Tllustration os oco a ode oe coUe eg 13 E Electronics Console Assembly usus 39 EPROM Replacing corse es oos ES Cr Ad a coii 32 jl D 60 User Brogar os Sei R S Poor WO b I CL SEE mE 34 Error Codes E13 Volumetric Overflow 05 15 E0 No Error sd sor Ter aao pA cese as 14 El Low Signals 4 3582 rer Rape utere 14 E2 Soundspeed 14425 Pese md du eR uersu 14 E3 Velocity Ranges sce 2545 cs pt P Re s 14 F4 Signal Cales erg arri 14 E5 ENEE 15 E6 Cycle Skip Acceleration 15 E7 Analog Output 24 deer WEE ANN 15 E8 s Analog Input E 15 E9 Totalizer Overflow 000000 15 Error Message Display Screen 13 Expansion Slots us eM E VR Sede 1 47 F Factory Test Menu as euam hacen e Se 61 Flowcell Problems PMC aiid
50. ice Manual Chapter 1 Calibration 1 3 2 Calibrating the Low End of the Output Range 1 From the Keypad Program press the right arrow key to scroll to the CALIB menu Press Enter 2 Inthe Cal menu scroll to the Slot 0 or Slot 1 option and press Enter Note The Slot 1 option only appears in the menu if an option card has been installed in this slot 3 Scroll to either Output A or Output B to open the Analog Output menu Output A will be used as an example in this manual Press Enter IMPORTANT The procedure for calibrating Output B is identical to that for calibrating Output A However when calibrating Output B be sure to reconnect the ammeter on terminal block J1 See Figure 1 on page 2 for the correct pin numbers 4 Scroll to 4 mA to calibrate the low end of the output range Press Enter 5 Scroll to UP or DOWN to adjust the ammeter reading UP or DOWN until a 4 mA reading is achieved or Scroll to Numer and directly enter the mA reading In either case press Enter to confirm the entry 6 Once you have achieved a 4 mA reading scroll to either STORE to store the calibration or to ABORT to exit the menu without storing the calibration In either case press Enter Note Ifthe ammeter reading cannot be adjusted within 16 0 A of the 4 or 20 mA setting contact the factory for assistance 1 3 3 Calibrating the High End of the Output Range 7 The XMT868i returns to the Analog Output window Scroll to 20 mA
51. ice Manual V Preface Environmental Compliance Waste Electrical and Electronic Equipment WEEE Directive GE Measurement amp Control Solutions is an active participant in Europe s Waste Electrical and Electronic Equipment WEEE take back initiative directive 2002 96 EC The equipment that you bought has required the extraction and use of natural resources for its production It may contain hazardous substances that could impact health and the environment In order to avoid the dissemination of those substances in our environment and to diminish the pressure on the natural resources we encourage you to use the appropriate take back systems Those systems will reuse or recycle most of the materials of your end life equipment in a sound way The crossed out wheeled bin symbol invites you to use those systems If you need more information on the collection reuse and recycling systems please contact your local or regional waste administration Visit http www gesensing com environment weee htm for take back instructions and more information about this initiative vi DigitalFlow XMT868i Service Manual Chapter 1 Calibration Chapter 1 Calibration 1 1 Introduction Calibrating the Model XMT868i s analog outputs and inputs is explained in this chapter In addition testing the optional totalizer frequency and alarm relay outputs is discussed The chapter includes the following specific topics e calibrating the Slo
52. ice Record on page 43 These initial values can then be compared to current values to help diagnose any future malfunction of the system DigitalFlow XMT868i Service Manual 21 Chapter 3 Diagnostics 3 4 Flowcell Problems If preliminary troubleshooting with the Error Code Messages and or the Diagnostic Parameters indicates a possible flowcell problem proceed with this section Flowcell problems fall into two categories fluid problems or 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 GE for assistance 3 4 4 Fluid Problems Most fluid related problems result from a failure to observe the flowmeter system installation instructions as described in the Startup Guide Refer 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 fluid itself may be preventing accurate flow rate measurements The fluid being measured must meet the following requirements 1 The fluid must be homogeneous single phase relatively clean and flowing steadily Although a low level of entrained particles may have little effect on the operation of the Model XMT868i excessive amounts of solid or gas particles will absorb or disperse the ultrasound signals This interference with the ultras
53. italFlow XMT868i Service Manual 7 Chapter 1 Calibration 1 7 Testing Totalizer Outputs Totalizer outputs may be added to the Model XMT868i by installing an appropriate option card in Slot 1 This option card contains two or four totalizer outputs which are designated A B C and D 1 7 1 Preparing for Testing Prepare for the testing procedure by connecting a pulse counter to the desired output of the option card as shown in Figure 2 See Figure 4 on page 12 to identify the OUT and RTN pins for Output A on terminal block J2 Model XMT868 Pulse Counter Volts Int Pwr Sup Common Totalizer Output Model XMT868 Frequency Counter IN Common Frequency Output Figure 2 Totalizer and Frequency Output Wiring 1 7 2 Testing the Output 1 From the Keypad Program press the right arrow key to scroll to the CALIB menu Press Enter 2 Inthe Cal window scroll to Slot 1 Press Enter Note The Slot 1 option only appears at the above prompt if an option card is installed in this slot 3 Scroll to the desired Output Output A will be used as an example in this manual Press Enter 8 DigitalFlow XMT868i Service Manual Chapter 1 Calibration 1 7 2 Testing the Output cont IMPORTANT The procedure for testing all the outputs is the same However when testing another output be sure to reconnect the pulse counter at terminal block J2 See Figure 4 on page 12 for the correct pins
54. k on Slot 1 2 Double click on the desired input to open the RTD Calibration menu IMPORTANT The procedure for calibrating each input is identical However be sure to reconnect the temperature reference on terminal block J2 See Figure 4 on page 12 for the correct pin numbers Proceed to the corresponding sub section for specific instructions on each of the options shown above B 4 3a Set Point Option 1 Ifyouselected the Set Pt option in the RTD Input menu PanaView asks for the Low Reference Temp Enter the low reference value in the right pane and click Next Item 2 Double click on Store to accept the low reference value or on Abort to cancel the entry In either case the RTD Input prompt reappears The XMT displays an accepted message if the value is good or an out of limits rejected message if the value is bad If the value is rejected try again B 4 5b Slope Point Option 1 Ifyou selected the S ope Pt option in the RTD Input menu PanaView asks for the High Reference Temp Enter the high reference value in the right pane and click Next Item 2 Double click on Store to accept the low reference value or on Abort to cancel the entry In either case the RTD Input prompt reappears The XMT displays an accepted message if the value is good or an out of limits rejected message if the value is bad If the value is rejected try again Click Exit Page to return to the Slot 1 window and calibrate additional inputs outpu
55. lliamps and repeat the procedure in steps 3 4 and 5 to calibrate the high end of the output range Note Skip the following prompt if linearity testing of the output will not be performed at this time 7 Double click on Test to test the linearity of the currently selected analog output 8 Check the ammeter reading at 50 output Then enter a different output 0 100956 and double click on percent Check the ammeter reading at this setting and press Exit Page when done Table 8 on page 51 lists the expected ammeter readings at various 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 If the linearity test readings are not within 5 uA of the values listed in the table 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 Click Exit Page to return to the Slot 1 window and calibrate additional inputs outputs or click Exit Page again to close the Calibration Test menu 52 DigitalFlow XMT868i Service Manual Appendix B Calibration and Testing with PanaView B 4 2 Analog Inputs Analog inputs may be added to the Model XMT8681 by installing an appropriate option card in Slot 1 This option card contains two or four analog inputs which are designated as A B C and D Both the zero point and full scale value
56. meters have been set up When all of the display parameters have been set up the meter returns to the Global I O window To leave the Keypad Program press the Escape key three times After leaving the Keypad Program the XMT868i will reset itself and will begin to display the parameters specified in this section If more than one parameter was set up each of the parameters will be displayed in sequence with a pause of several seconds between display changes However if you have selected KEY you can scroll through a number of parameters in succession To scroll to a diagnostic parameter in this mode press the A or V keys to step through the various parameters To scroll through the channel options on a two channel XMT868i press the lt or D gt keys until you have reached the desired option 18 DigitalFlow XMT868i Service Manual Chapter 3 Diagnostics 3 2 2 Viewing Diagnostic Parameters Using PanaView 1 Power up the XMT868i and wait until it has initialized 2 Launch PanaView and wait until it initializes the XMT868i and displays the basic PanaView window 3 As described in Appendix C Programming the XMT868i with PanaView of the Programming Manual open the Meter Browser window and highlight the meter to be used Note See the PanaView User 5 Manual and or Appendix C Programming the XMT868i with PanaView in the Programming Manual for complete instructions on using PanaView 4 Pull down the Output menu and cli
57. new fuse of the same rating and type Use only a type 3AG 1 1 4 x 1 4 Slo Blo fuse having a rating as indicated in Table 4 Table 4 Line Voltages amp Fuse Ratings Line Voltage Fuse Rating 12 28 VDC 2 0 A Slo Blo 6 Press the new fuse into the fuse holder and reinstall the plastic fuse cover To complete the fuse replacement proceed to nstalling the Circuit Board Assembly on page 37 Note Be sure to record the fuse replacement in Appendix A Service Record DigitalFlow XMT868i Service Manual 31 Chapter 4 Parts Replacement 4 5 Replacing the User Program The Model XMT8681 s User Program is stored on an erasable programmable read only memory EPROM chip The EPROM which is designated as component U6 is mounted in a socket on the front of the main circuit board EPROM replacement may be required to replace a defective chip or to upgrade to a newer software version To replace the User Program refer to Figure 8 on page 40 and complete the following steps 1 Complete the steps in Removing the Circuit Board Assembly on page 28 and page 29 2 Place the circuit board assembly on a flat surface with the terminal board facing upward See Illustration 7 in Figure 8 on page 40 and remove the three PCB mounting screws with flat washers and lock washers indicated This will also remove the green grounding jumper 3 Locate and unscrew a fourth smaller bracket screw close to J2 on the terminal board capturing the
58. number of channels either 1 or 2 IMPORTANT Contact GE if the XMT666i fails any of the tests covered below B 5 3a EPROM Test To test the EPROM from the Calibration Test menu 1 From the left pane of the Calibration Test window double click on Hardware Test 2 Inthe center pane double click on EPROM Test 3 The right pane displays the EPROM Sum Value Click Next Item or Exit Page to return to the Hardware Test option and Exit Page again to return to the main Calibration Test menu B 5 30 RAM Test To check the RAM Note Ifyou are in the Hardware Test option skip to step 2 1 From the left pane of the Calibration Test window double click on Hardware Test 2 Inthe center pane double click on RAM Test 3 The right pane displays the RAM Value along with an indication as to whether the RAM is functioning Click Next Item or Exit Page to return to the Hardware Test option and Exit Page again to return to the main Calibration Test menu B 5 3c Setting the Number of Channels To set the number of XMT868i channels for display 1 From the left pane of the Calibration Test window double click on Hardware Test 2 In the center pane double click on Set Chans 3 Inthe Number of Channels window double click on or 2 Channels PanaView returns to the Hardware Test option Click Exit Page to return to the main Calibration Test menu and Close to exit the Calibration Test menu 60 DigitalFlow XMT868i Servi
59. o Illustration 7 in Figure 8 on page 40 Carefully align the terminal board onto the main board power supply assembly and the two option boards Slot 1 and Slot 2 where applicable so that the connectors listed in Table 5 on page 36 are facing each other DigitalFlow XMT868i Service Manual 35 Chapter 4 Parts Replacement 4 7 1 Assembling the Circuit Board Assembly cont Table 5 Matings for Terminal Board Terminal Board Mating Board J7 Connector Large 3 Pin Connector Plug Power Tab on AC Power Supply Board J6 Connector Large 3 Pin Connector Plug Power Tab on DC Power Supply Board P7 Connector J7 Connector on Main Board P10 Connector J9 Connector on Main Board P9 Connector J10 Connector on Main Board P8 Connector J8 Connector on Main Board P21 Connector J1 J3 Connector on I O Board Slot 2 Option P22 Connector P2 Connector on UO Board Slot 1 1 2 5 4 5 6 7 8 5 Firmly press the terminal board and the interconnect board toward each other until all of the connectors are completely seated IMPORTANT With two option cards installed it may require some patience to get all of the connectors properly aligned Do not force the assembly together or some of the pins may not enter the sockets properly 6 Secure the assembly together by installing the three mounting screws flat washers and lock washers previously removed from the terminal board Be sure to install one end of the g
60. o calibrate additional inputs outputs B 4 Calibrating Slot 1 Option Cards To calibrate any option card installed in Slot 1 of the XMT868i enter the Calibration Test menu as shown in Figure 11 on page 48 1 Inthe center pane double click on Slot 1 Note The Slot 1 option only appears in the center pane if an option card has been installed in this slot Notice that all of the available outputs usually four appear at the above prompt The desired type of output may appear as the A and B output pair and or as the C and D output pair Simply select the appropriate output for calibration and or testing For clarity in this chapter the desired outputs are always placed in the A and B positions and the C and D positions are not specifically listed In addition Output A is always used as an example Proceed to the appropriate sub section for specific instructions and substitute the correct output letter for the A shown in the procedures DigitalFlow XMT868i Service Manual 51 Appendix B Calibration and Testing with PanaView B 4 Calibrating Slot 1 Option Cards cont B 4 1 Analog Outputs Additional analog outputs may be added to the Model XMT868i by installing an appropriate option card in Slot 1 This option card contains two or 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
61. o content intended for this page 38 DigitalFlow XMT868i Service Manual Chapter 4 PartsReplacement Set Screw Digital m d R neis sneg Steam Flow Transmitter Set Screw Rear Cover solid Console Assembly Front Cover with Window Illustration 1 ICS Electronics Assembly Enclosure Assembly Mounting Screw with Washer Assembly 4 places Model XMTS868i Electron Terminal Block on amp Sl e S TBI Slot 2 Option Card Sel o Figure 7 Ground Screw Label Plate with Ground Symbol Grounding Jumper Wire Illustration 2 Illustration 3 DigitalFlow XMT868i Service Manual 39 Mounting Screw and Washer Assembly 3 places P9 Connector on Terminal Board connects to J10 Connector on Main Board LCD Display Keypad Board and Interconnect Board Sub Assembly P1 Connector Green Grounding Jumper P4 Connector F2 Connector P10 Connector on Terminal Board connects to J1 Connector J9 Connector on Main Board Terminal Board J2 Connector J4 Connector J6 J7 Connector on Terminal Board connects to Power Tab on Power Supply Board P7 Connector on Terminal Board connects to J7 Connector on Main Board Illustration 4 shown with heatsinks removed for clarity Standoff Screw Lock Washer and Flat Washer 2 places Keypad Board L
62. of channels that is FRIG1 or FRIG2 Press Enter The XMT868i reinitializes with factory default settings and displays the message Review meter settings Since the default for the meter display is OFF you will need to enter the Keypad Program to reset the LCD as described below Press Escape Enter Escape 3 4 Inthe Keypad Program window scroll to PROG and press Enter 5 Inthe PROG menu scroll to GLOBL and press Enter 6 Scroll to UO and press Enter DigitalFlow XMT868i Service Manual 61 Appendix C Factory Tests C 3 Resetting the XMT868i to Factory Defaults cont 7 Scroll to LCD and press Enter 8 The window now asks for the of LCD Parameters Scroll to the desired number from OFF through 1 4 and KEY and press Enter For a 1 Channel XMT868i the data for Channel 1 is displayed automatically and you can skip to step 9 However for a 2 Channel meter the channel data to be displayed must be specified at the following prompt 9 Scroll to the desired Channel option as listed in Table 9 Table 9 Channel Options Channel 1 Channel 2 CH1 CH2 CH1 CH2 CH1 CH2 2 10 For each channel select the desired Measurement Parameter as shown in the Programming Manual Note The measurement units that appear in these prompts are those selected in the GLOBL SYSTM menu The previous two prompts repeat until all of the specified of LCD Parameters have been set up When
63. ound transmissions through the fluid will cause inaccurate flow rate measurements In addition temperature gradients in the fluid flow may result in erratic or inaccurate flow rate readings 2 The fluid must not cavitate near the flowcell Fluids with a high vapor pressure may cavitate near or in the flowcell This causes problems resulting from gas bubbles in the fluid Cavitation can usually be controlled through proper installation design 3 The fluid must not excessively attenuate ultrasound signals Some fluids particularly those that are very viscous readily absorb 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 4 The fluid sound speed must not vary excessively The Model XMT868i will tolerate relatively large changes in the fluid sound speed as may be caused by variations in fluid composition and or temperature However such changes must occur slowly Rapid fluctuations in the fluid sound speed to a value that is considerably different from that programmed into the XMT868i 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 22 DigitalFlow XMT868i Service Manual Chapter 3 Diagnostics 3 4 2 Pipe Problems Pipe related problems may result either from a f
64. outputs or click Exit Page again to close the Calibration Test menu DigitalFlow XMT868i Service Manual 55 Appendix B Calibration and Testing with PanaView B 45 Testing Totalizer Outputs Totalizer outputs may be added to the Model XMT868i by installing an appropriate option card in Slot 1 This option card contains two or four totalizer outputs which are designated A B C and D Prepare for the testing procedure by connecting a pulse counter to Output A of the option card as shown in Figure 2 on page 8 See Figure 4 on page 12 to identify the OUT and RTN pins for Output A on terminal block J2 1 In the center pane of the Calibration Test window double click on Slot 1 2 Double click on either Output A or Output B to open the Totalizer Output menu Output A will be used as an example in this manual IMPORTANT The procedure for testing Output B is identical to that for testing Output A However be sure to reconnect the frequency counter on terminal block J2 See Figure 4 on page 12 for the correct pin numbers 3 Atthe Pulse On Time prompt enter the width of the high time for the totalizer square wave and click Next Item 4 Atthe Pulses prompt enter the number of pulses desired between 1 and 10 000 and click Next Item That number of pulses will then be output at the specified frequency 5 Repeat steps 2 3 and 4 to test all of the available totalizer outputs If any of the totalizer outputs fails the te
65. play see Figure 8 on page 40 for the component locations and complete the following steps 1 2 Complete the steps in Removing the Circuit Board Assembly on page 28 and page 29 Place the circuit board assembly on a flat surface with the LCD display board facing upward Refer to Illustration 4 in Figure 8 on page 40 and remove the three mounting screws with flat washers and lock washers indicated Grasp the LCD display keypad board interconnect board subassembly at the top and bottom edges and carefully pull it straight upward until it comes free from the main board and option boards Refer to Illustration 5 in Figure 8 on page 40 Remove two screws from the back of the interconnect board Then hold the edge of the keypad board by one hand and the edge of the LCD display interconnect board by the other hand and pull the two boards apart Note The two circuit boards are attached by a connector located beneath the top edge of the LCD display board see Illustration 5 in Figure 8 on page 40 The LCD display is attached to the interconnect board as one subassembly Do not disassemble the LCD display from the interconnect board Place the keypad board directly over the new LCD display interconnect board subassembly and align the J1 connector on the rear of the keypad board with the P6 pins on the interconnect board Firmly push the two boards together until the interconnect board contacts the two standoffs on the keypad board Secure th
66. r to the menu maps in Figure 3 on page 11 as a guide in following the calibration instructions IMPORTANT Before you attempt to communicate with the XMT868i be sure you have linked your PC to the XMT868i using an RS232 interface For details on wiring the interface refer to Wiring the Serial Port in the Startup Guide and to the document EIA RS Serial Communications 916 054 You must also install PanaView as discussed in the PanaView User s Manual 910 211 DigitalFlow XMT868i Service Manual 47 Appendix B Calibration and Testing with PanaView Accessing the Calibration Test Menu cont 1 Power up the XMT868i and wait until it has initialized 2 Launch PanaView and wait until it initializes the XMT8681 and displays the basic PanaView window 3 As described in the PanaView User x Manual open the Meter Browser window and highlight the XMT868i 4 Expand the Edit Functions option The window now appears similar to that shown in Figure 10 Bi Panaview Meter Browser Ey File Edit View Output Window Help Contents of Network My Computer MELANCEL Untitled IDM Com 1 NTHIS IS AN XMT E Bl Network Type Bl My Computer MELANCEL Logs Stored on Meter Y B PC Logs Meter Display S F Untitled IDM Com 1 User Interpolation Tables pe THIS IS AN XMT Meter Channel Channel 1 Meter Channel Channel 2 Meter Channel Sum Difference Meter Channel Difference Average Meter Channel Average Meter Logs ee T SITE EDIT M
67. ransducer 100 900 lt 100 or gt 900 P dn DN Peak Displays signal peaks for the downstream 100 900 lt 100 or gt 900 transducer NFup UP Norm Factor Displays the normalization factor for the upstream 0 85 1 0 lt 0 85 transducer NFdn DN Norm Factor Displays the normalization factor for the 0 85 1 0 lt 0 85 downstream transducer Cxdcr CEE Displays the speed of sound in the transducer N A N A clamp on only TEMPs Supply Temp Displays the temperature for the supply input N A N A 20 energy measurement DigitalFlow XMT868i Service Manual Chapter 3 Diagnostics Table 3 Available Diagnostic Parameters cont Keypad PanaView Parameter Parameter Choice Choice Description Return Temp Displays the temperature for the return input energy measurement Supply Rtn Difference between supply input and return input measurement energy measurement Supply Dens Displays the density for the supply input energy measurement Return Dens Displays the density for the return input energy measurement Delta h Displays the delta enthalpy which is the difference between the supply and return Enthalpy is a measure of energy contained in the fluid energy measurement 3 3 Diagnostic Record The values for the diagnostic parameters immediately after initial installation of the meter and verification of proper operation should be entered in Table 6 Serv
68. reen grounding jumper wire under the screw indicated in Illustration 7 in Figure 8 on page 40 The smaller screw should be used at the angle bracket location and secured with a nut lock washer and flat washer Proceed to the next section for instructions on installing the reassembled circuit board assembly in the electronics enclosure 36 DigitalFlow XMT868i Service Manual Chapter 4 Parts Replacement 4 7 2 Installing the Circuit Board Assembly Be sure that the circuit board assembly is completely assembled as described in the previous section Then refer to Illustrations 1 2 and 3 in Figure 7 on page 39 and install the circuit board assembly into the electronics enclosure as follows 1 Slide the terminal board end of the circuit board assembly into the front of the electronics enclosure By aligning the slots around the circumference of the terminal board with the bosses inside the enclosure guide the circuit board assembly into the enclosure until the terminal board just clears the bosses at the rear of the enclosure Refer to Illustration 3 2 From the rear of the enclosure rotate the circuit board assembly about 20 clockwise so that the mounting holes in the terminal board are positioned over the tapped holes in the bosses Secure the circuit board assembly to the enclosure with the four mounting screws flat washers and lock washers previously removed Refer to Illustration 2 IMPORTANT Jf the circuit board assembly
69. ringulie Seb POM s res ecient ttm EE 6 LSU lee Be SIO PEs ZZ dac Vat ead teased sea meds sans EL luteum eee Mt 6 TG TESTING AIC REINS aa oy iced Sa EEUU te UL SPURS E n ee 7 GST PVSP GING FOE Te HB TTT 7 T6727 Testing the REG roo Ceres torneo capt It ah Aes olii Hom ptr ate deerat 7 lu testing Totalizer QUIDUES eg e Eee team E eut 8 TI Prepare Tor Ine a mi ae ctae cen a e bc ce PO NEP Dc POR Aa Rad E Id ada ET ee 8 72 Testing the CULO us Drei qo on D irt debe dO pedea dar bi da el ade Platte eid Hed ete bee 8 1 8 Testing the Frequency OUIPINS os edes Ce AX T R R T TL SO XR FoU d betae doe aaa A Pp NAAR 10 1 9 1 Preparing for R DEE 10 ee LP EET DECIDERE SORT RTT CENE REST Bese eh ee ia ERIT AERE ELITR 10 Chapter 2 Error Codes Sch HEIEREN BEE EE 13 Chapter 3 Diagnostics S HE REIH i ise sep naw nak Senge a ettet tepidis at bU eise es oes pibe ee nea eddie bos 17 3 2 Displaying Diagnostic Parameters veo preteen P PS e e Et QUPD FIR IS DENS 17 3 2 1 Viewing Diagnostic Parameters Using the Keypad Program 17 3 2 2 Viewing Diagnostic Parameters Using PanaView 0 0 0 0 6c cece cnt n tenet nee n ee enes 19 KD Ieas 0 CORA TEM EE EE 21 3A Ee EEN e MERE ee ee 22 SERA ed Eed er eeh ER EE E de EE 23 55 qrapsdeeer m Lo ellla NENA E the ren sm Sha ee cern E ar EE 24 3 5 1 Wetted Transducer Problems 313 c tee oA e Et Les a eat cer Colas etait dela fa d ert ud 24 5 5 2 Clamp on Transducer OC 25 DigitalFlow XMT868i Service Manual iii
70. s for each input must be calibrated 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 O 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 IMPORTANT Jfa Slot 0 analog output will be used to calibrate the analog inputs the Slot 0 analog output calibration procedure must be completed first Prepare for calibration procedure by connecting a Slot 0 analog output or an independent calibrated current source to Input A of the option card See Figure 4 on page 12 to identify the IN and RTN pins for Input A on terminal block J2 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 Inthe center pane of the Calibration Test window double click on Slot 1 2 Double click on the input to be calibrated IMPORTANT All inputs are calibrated in an identical manner However be sure to reconnect the current source on terminal block J2 See Figure 4 on page 12 for the correct pin numbers 3 Double click on the appropriate option to select the reference point to be calibrated Proceed to the corresponding sub section for specific instr
71. s that the present measurement exceeds the range of the meter Cause A internal mathematical overflow has occurred in either the volumetric or mass flow calculations Action Select larger measurement units or a shorter time interval for the current measurement parameter For example choose MGAL M instead of GAL M in the Channel System menu See Chapter 2 Initial Setup of the Startup Guide for instructions DigitalFlow XMT868i Service Manual 15 Chapter 2 Error Codes no content intended for this page 16 DigitalFlow XMT868i Service Manual Chapter 3 Diagnostics Chapter 3 Diagnostics 3 1 Introduction This chapter explains how to troubleshoot the Model XMT8681 if problems arise with the electronics enclosure the flowcell or the transducers Indications of a possible problem include e display of an error message on the LCD display screen or the PanaView text display e erratic flow readings readings of doubtful accuracy 1 e readings that are not consistent with readings from another flow measuring device connected to the same process If any of the above conditions occurs proceed with the instructions presented in this chapter 3 2 Displaying Diagnostic Parameters The Model XMT868i has built in Diagnostic Parameters to aid in the troubleshooting of flowcell transducer and or electrical problems You can access these parameters either through the Keypad Program or through PanaView 3 2 1 Viewing Diagnostic
72. ss the right arrow key to scroll to the CALIB menu Press Enter 2 Inthe Cal window scroll to Slot 1 Press Enter 3 Scroll to the desired Input to open the ANALOG INPUT menu Input A will be used as an example in this manual Press Enter IMPORTANT Calibrating Input B C or D is identical to calibrating Input A However be sure to reconnect the current source on terminal block J2 See Figure 4 on page 12 for the correct pin numbers 4 Scroll to the appropriate option to select the reference point to be calibrated Press Enter IMPORTANT The procedure for calibrating all the inputs is the same However when calibrating a different input be sure to reconnect the current source at terminal block J2 See Figure 4 on page 12 for the correct pin numbers 5 Doone ofthe following Proceed to 4 mA Option below Proceed to 20 mA Option below 1 420 A m Option Set the calibrated current source to 4 mA Ifyou selected the 4 mA option in the ANALOG INPUT menu scroll to STORE to accept the current 4 mA value or on ABORT to cancel the entry Press Enter In either case the XMT868i returns to the Analog Input window 1 4 26 20 mA Option Set the calibrated current source to 20 mA Ifyou selected the 20 mA option in the ANALOG INPUT option scroll STORE to accept the current 20 mA value or to ABORT to cancel the entry Press Enter In either case the XMT868i returns to the ANALOG INPUT window Press Escape to
73. st contact GE for assistance Click Exit Page to return to the Slot 1 window and calibrate additional inputs outputs or click Exit Page again to close the Calibration Test menu B 4 6 Testing Frequency Outputs Frequency outputs may be added to the Model XMT868i by installing an appropriate option card in Slot 1 This option card contains two or four frequency outputs which are designated A B C and D Prepare for the testing procedure by connecting a frequency counter to Output A of the option card See Figure 4 on page 12 to identify the OUTO and RTN pins for Output A on terminal block J2 1 In the center pane of the Calibration Test window double click on Slot 1 2 Double click on either Output A or Output B to open the Frequency Output menu Output A will be used as an example in this manual IMPORTANT The procedure for testing Output B is identical to that for testing Output A However be sure to reconnect the frequency counter on terminal block J2 See Figure 4 on page 12 for the correct pin numbers 3 Atthe Frequency prompt enter a frequency between 1 and 10 000 Hz and click Next Item Verify that the frequency counter reads the correct value 4 Repeat steps 2 and 3 to test all of the available frequency outputs If any of the frequency outputs fails the test contact GE for assistance Click Exit Page to return to the Slot J window and calibrate additional inputs outputs or click Exit Page again to close
74. t 0 and Slot 1 analog outputs page 2 calibrating option card analog inputs page 4 calibrating option card RTD inputs page 6 testing option card alarm relays page 7 testing option card totalizer outputs page 8 testing option card frequency outputs page 10 Note Convention in this manual identifies any expansion slot as Slot x where x is a number from 0 2 Slot 2 is used only for data logging or communications option cards See Chapter 1 nstallation and Appendix B Data Records in the Startup Guide for a complete description of the available option cards and the procedures for wiring them 1 2 Accessing the Calibration Menu The Calibration menu is accessible through the Keypad Program as well as through PanaView software If you are using PanaView to calibrate the XMT868i refer to Appendix B Use this menu to calibrate and test the Slot 0 analog outputs as well as to calibrate and or test any option cards that are installed in expansion Slot 1 Refer to the menu maps in Figure 3 on page 11 as a guide in following the calibration instructions 1 Power up the XMT868i and wait until it has initialized 2 Press the Escape Enter Escape keys The Keypad Program appears on the screen 3 Press the right arrow key to scroll to the CALIB menu Press Enter The Cal window opens Proceed to the appropriate sections of this chapter to calibrate and or test any of the installed inputs and or outputs
75. talizer Outputs 22 dared antes daw ed Mia a 8 Output Connections e 12 P PanaView for Calibrating n n nannanaa aa 47 Parameter Selecting e Ben BEEN 19 Pipe Measurements oed ho cutie Spe Si 23 Problems 4 5 252 ee Sets States ed 23 Printed Circuit Board EPROM 32 Problems Transducers llle 24 R RAM Tests 5 cag EE 60 Replacing See Part Name Retur Policy u dea 2d eke veles Ee qu 67 RTD Inputs Calibratie uve i pede RESP D 54 Option Card Calibrating 6 S Service Record oxi sre Rr awk 43 Set Point in RTD Calibration 6 Signal Array Data Uploading 57 Signal Quality Error EA 14 Slope in RTD Calibration e 6 Soundspeed BOE B2 eed RARUS V ad sed 14 Fluid i aite dete robe EES 22 DigitalFlow XMT868i Service Manual T Testing Alarm Relay sors a RR ee RE RES 7 Frequency Output 10 56 Hard wate eck Z TER ee Fee es 57 60 DOMWale estab E son Chee Nos K ee 57 Totalizer Outputs 24s cPDE LEVIS ae oa 8 56 Totalizer Option Card Testing nonnene nanan 8 Totalizer Outputs Testing 56 Totalizer Overflow Error E9 na nunananaaaa 15 Transducers Corrosion 1154 bode ER ane Tae R boa eee Sued 24 Cycle SEID srani res sehen PORE na PES ege A 25 Internal Damage A a2 eat wns AE 24 25 Pc qr 24 Misalignment o sos wozu eee NP 25 Physical Damages v ve RR 24 25 Placement arrei dn eee NR RN ES 23 Poor Coupling qd qub etos rac tain 25
76. tes may be present in the flowcell Poor coupling for clamp on transducers Action Refer to Chapter 3 Diagnostics to correct any flowcell problems E6 Cycle Skip Acceleration Problem The acceleration exceeds the limits programmed in the SETUP SIGNAL submenu of the User Program Cause This condition is usually caused by poor flow conditions or improper transducer alignment Action Refer to Chapter 3 Diagnostics to correct any flowcell and or transducer problems E7 Analog Out Error Problem The current in the analog output circuit exceeds the limits for the analog output port Cause The output load exceeds the specified limits for the analog output port Action Make sure the output load is 600 ohms for the Slot 0 analog outputs or is 1000 ohms for an analog outputs option card in Slot 1 E8 Analog In Error Problem This message indicates a temperature input error Cause The temperature exceeds the specified limits for the analog RTD inputs option card or no input device is connected Action Check the temperature transmitter and the connecting cable Refer to Chapter 1 Calibration and recalibrate the analog RTD inputs option card E9 Totalizer Overflow Problem The totalizers are unable to keep up with the total accumulated flow signals Cause The programmed units pulse value is too small Action Select a larger number of units pulse value E13 Volumetric Overflow Problem This error code message indicate
77. the following tasks removing the circuit board assembly replacing the LCD display interconnect subassembly replacing the fuse replacing the User Program installing an option card assembling installing the circuit board assembly WARNING Prior to performing any maintenance procedures be sure to disconnect the main power from the unit If the XMT868i is installed in a hazardous environment a the electronics enclosure must be moved to a safe area prior to removing the covers or b if the electronics enclosure cannot be moved to a safe area ensure that the surrounding area is free of ignitable gases Note For compliance with the European Union x 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 XMT666i Use Figure 7 on page 39 Figure 8 on page 40 and Figure 9 on page 41 to locate the relevant components while completing the service procedures discussed in this chapter IMPORTANT Keep a detailed record of all parts installations and replacements performed on the XMT868i in the Appendix A Service Record This service history may prove very helpful in diagnosing any future problems DigitalFlow XMT868i Service Manual 27 Chapter 4 Parts Replacement 4 2 Removing the Circuit Board Assembly All parts repl
78. ts or click Exit Page again to close the Calibration Test menu 54 DigitalFlow XMT868i Service Manual Appendix B Calibration and Testing with PanaView B 4 4 Testing Alarm Relays Alarm relays may be added to the Model XMT8681 by installing an appropriate option card in Slot 1 This option card contains two or four alarm relays which are designated A B C and D Prepare for the testing procedure by connecting an ohmmeter to Alarm A of the option card See Figure 4 on page 12 to identify the NO NC and COM pins for Alarm A on terminal block J2 1 Inthe center pane of the Calibration Test window double click on Slot 1 2 Double click on either Output A or Output B to open the A arm Relay menu Output A will be used as an example in this manual IMPORTANT The procedure for testing Alarm B is identical to that for testing Alarm A However be sure to reconnect the ohmmeter on terminal block J2 See Figure 4 on page 12 for the correct pin numbers 3 The center pane now offers three choices Double clicking on Close should yield an ohmmeter reading of about zero Double clicking on Open should yield an infinite ohmmeter reading Double clicking on Exit closes the Alarm Relay menu and returns you to the Output window 4 Repeatsteps 2 and 3 until both the normally open and normally closed contacts for all alarm relays have been tested Then click Exit Page to return to the Slot 1 window and calibrate additional inputs
79. 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 calibration by inserting an ammeter in series with the load on Output A of the option card See Figure 12 on page 49 to identify the OUT and RTN pins for Output A on terminal block J2 2 Double click on either Output A or Output B to open the Analog Output menu Output A will be used as an example in this manual IMPORTANT The procedure for calibrating Output B is identical to that for calibrating Output A However be sure to reconnect the ammeter on terminal block J2 See Figure 4 on page 12 for the correct pin numbers 3 Double click on 4 milliamps to calibrate the low end of the output range 4 Double click on 4 mA UP or 4 mA DOWN to adjust the ammeter reading UP or DOWN until a 4 mA reading is achieved or Double click on 4 mA Numeric Cal and directly enter the mA reading in the right pane 5 Once you have achieved a 4 mA reading double click on either 4 m4 STORE to store the calibration or on 4 mA ABORT to exit the menu without storing the calibration Note Ifthe ammeter reading cannot be adjusted within 5 0 uA of the 4 or 20 mA setting contact the factory for assistance 6 PanaView returns to the Analog Output window Double click on 20 mi
80. uctions on each of the options available in step 3 B 42a A m Option Set the calibrated current source to 4 mA e Ifyou selected the 4 mA option in the Analog Input menu double click on Store to accept the current 4 mA value or on Abort to cancel the entry In either case the Analog Input prompt reappears B 4 2b 20 mA Option Set the calibrated current source to 20 mA Ifyou selected the 20 mA option in the Analog Input menu double click on Store to accept the current 20 mA value or on Abort to cancel the entry In either case the Analog Input prompt reappears Click Exit Page to return to the Slot 1 window and calibrate additional inputs outputs or click Exit Page again to close the Calibration Test menu DigitalFlow XMT868i Service Manual 53 Appendix B Calibration and Testing with PanaView B 4 3 RTD Inputs RTD inputs may be added to the Model XMT868i by installing an appropriate option card in Slot 1 This option card contains two or four RTD inputs which are designated as A B C and D Both the set and slope temperature values for each input must be calibrated Calibration of the RTD inputs requires the use of a calibrated RTD source Prepare for the calibration procedure by connecting an independent calibrated RTD source to the desired input of the option card See Figure 4 on page 12 to identify the RTD and COM pins on terminal block J2 1 Inthe center pane of the Calibration Test window double clic
81. utputs 1 4 Calibrating Analog Inputs Analog inputs may be added to the Model XMT868i by installing an appropriate option card in Slot 1 This option card contains two or four analog inputs which are designated as A B C and D Both the zero point and full scale values for each input must be calibrated 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 O analog outputs may be used for the calibration During the analog input calibration the Slot O analog output will supply the low reference high reference 4 mA and 20 mA signals at the appropriate times IMPORTANT Jfa Slot O analog output will be used to calibrate the analog inputs the Slot O analog output calibration procedure must be completed first 4 DigitalFlow XMT868i Service Manual Chapter 1 Calibration 1 4 1 Preparing for Calibration Prepare for the calibration procedure by connecting a Slot 0 analog output or an independent calibrated current source to the desired input on the option card See Figure 4 on page 12 to identify the IN and RTN pins for the desired input on terminal block J2 Note The zero point of the analog input may be set for either 0 mA or 4 mA However the calibration always uses the 4 mA point as the meter extrapolates this value to obtain the 0 mA point 1 4 2 Accessing the Calibration Test Menu 1 From the Keypad Program pre
82. 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 C Measuring P and L Dimensions of the Startup Guide for a thorough discussion of this topic 3 The inside of the pipe or flowcell must be relatively clean Excessive build up of scale rust or debris will interfere with flow measurement Generally a thin coating or a solid well adhered build up on the pipe wall will not cause problems Loose scale and thick coatings such as tar or oil will interfere with ultrasound transmission and may result in incorrect or unreliable measurements DigitalFlow XMT868i Service Manual 23 Chapter 3 Diagnostics 3 5 Transducer Problems Ultrasonic transducers are rugged reliable devices However they are subject to physical damage from mishandling and chemical attack Clamp on transducers are also subject to installation variables such as physical misalignment and faulty coupling to the pipe on which they are mounted Because transducers problems are largely dependent on the type of transducers used wetted or clamp on the following list of potential problems is grouped according to transducer type Contact GE 1f you cannot solve a transducer related problem 3 5 1 Wetted Transducer Problems 1 LEAKS Leaks may occur around the transducer and or the flowcell fittings Repair such leaks immediately If the leaking fluid is corrosive
83. y DigitalFlow XMT868i Service Manual 57 Appendix B Calibration and Testing with PanaView B 5 1 Uploading Signal Array Data cont 4 PanaView now offers two options for Uploading the array data f you double click on 7o Display the right pane of the window appears similar to Figure 13 and the data is available for immediate evaluation Click Exit Page to close the window and return to the Calibration Test menu iw CALIBRATION TEST oad XMT memory Hardware test UPLOAD NOW TD DISPLAY Array to load Raw UP signal Channel Channel 1 Exit Page Figure 13 Signal Array Data Displayed on PanaView f you double click on 7o File another window opens similar to Figure 14 Enter a file name and click Save PanaView stores the array data in a Windows file and closes the Calibration Test window Save in y Panaview gt e ek E3 Chart E a Site3 sit Logs MeterConfigs mdb al Site4 prt History PanaView 1 3 11 EXE ONLY S NewLogt txt e Sites sit PanaView 1 3 7 Exe Only is PanaCom ocx iae Work st f j a CFUNCUP ids Panaview exe a Work2 sit Desktop D eg PanaView Idb ai working sit E amp PanaView mdb al workingl st raw txt a XMTMEM My Documents Site1 sit 5 sitet txt a Site2 sit My Network P Save as type Al Files Ae D File name Raw P zl cnca Figure 14 Saving Signal Array Data to File 58 DigitalFlow XMT868i Service Manual

GE Panametrics XMT868i Ultrasonic Flow Transmitter

Contents

Download Pdf Manuals

Related Search

Related Contents