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Panametrics DigitalFlow XMT868i Service Manual

Ultrasonic flow transmitter for liquids (1 & 2-channel)
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DigitalFlow™ XMT868i
Ultrasonic Flow Transmitter for Liquids
(1 & 2-Channel)
Service Manual
910-171S
panametrics.com
August 2021

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  • Page 1 Flow DigitalFlow™ XMT868i Ultrasonic Flow Transmitter for Liquids (1 & 2-Channel) Service Manual 910-171S panametrics.com August 2021...
  • Page 3 Service Manual 910-171S August 2021 panametrics.com Copyright 2021 Baker Hughes company. This material contains one or more registered trademarks of Baker Hughes Company and its subsidiaries in one or more countries. All third-party product and company names are trademarks of their respective...
  • Page 4 [no content intended for this page]...

  • Page 5: Table Of Contents

    Contents Chapter 1. Calibration Introduction ..................... .1 Accessing the Calibration Menu .
  • Page 6 Contents Appendix B. Calibration and Testing with PanaView Introduction ....................19 Accessing the Calibration/Test Menu.
  • Page 7 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.
  • Page 8 Preface Environmental Compliance Waste Electrical and Electronic Equipment (WEEE) Directive Baker Hughes 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.

  • Page 9: Chapter 1. Calibration

    Chapter 1. Calibration Chapter 1. Calibration 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: •...

  • Page 10: Calibrating And Testing Analog Outputs

    Chapter 1. Calibration 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.

  • Page 11: Calibrating The Low End Of The Output Range

    Chapter 1. Calibration 1.3.2 Calibrating the Low End of the Output Range From the Keypad Program, press the right arrow key to scroll to the CALIB menu. Press [Enter]. In the 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.

  • Page 12: Calibrating Analog Inputs

    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*...

  • Page 13: Preparing For Calibration

    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.

  • Page 14: Calibrating Rtd Inputs

    Chapter 1. Calibration 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.

  • Page 15: Testing Alarm Relays

    Chapter 1. Calibration 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...

  • Page 16: Testing Totalizer Outputs

    Chapter 1. Calibration 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...
  • Page 17 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. Use the arrow keys to enter a value for the minimum pulse on time (between 1 sec and 10,000 sec) for the frequency of the totalizer pulses and press [Enter].

  • Page 18: Testing The Frequency Outputs

    Chapter 1. Calibration 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...
  • Page 19 Chapter 1: Calibration Escape Escape Enter KEYPAD PROGRAM PROG RESET CALIB CNTRS (See Programming Manual) Reset Totals DARKN LITEN SLOT0 SLOT1 Slot 0 Analog Outputs Slot 1 Option Card Analog Inputs Alarm Relays Slot 1 Slot 1 ANALOG OUTPUT press [ESC] key ALARMS 4 mA 20 mA...
  • Page 20 Chapter 1: Calibration -01 (AA,HH) -02 (FF,TT,FT,CT,CF) -03 (FO,TO,CO) -04 (FA,FH,TA,TH,CA,CH) -05 (CI,TI,FI) -06 (CR,FR,TR) Pin 1 Pin 1 Pin 1 Pin 1 Pin 1 Pin 1 -07 (CIR) -08 (AI,HI) -09 (OI) -10 (OR) -11 (AR,HR) -12 (II) Pin 1 Pin 1 Pin 1 Pin 1...

  • Page 21: Chapter 2. Error Codes

    Chapter 2. Error Codes Chapter 2. Error Codes 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.
  • Page 22 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: Poor ultrasonic signal strength or the signal exceeds the limits entered using the User Program.
  • Page 23 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 particulates may be present in the flowcell. Poor coupling for clamp-on transducers. Action: Refer to Chapter 3, Diagnostics, to correct any flowcell problems.
  • Page 24 Chapter 2. Error Codes DigitalFlow™ XMT868i Service Manual...

  • Page 25: Chapter 3. Diagnostics

    Chapter 3. Diagnostics Chapter 3. Diagnostics Introduction This chapter explains how to troubleshoot the Model XMT868i if problems arise with the electronics enclosure, the flowcell, or the transducers. Indications of a possible problem include: • display of an error message on the LCD display screen or the PanaView text display •...

  • Page 26: Viewing Diagnostic Parameters Using The Keypad Program

    Chapter 3. Diagnostics 3.2.1 Viewing Diagnostic Parameters Using the Keypad Program (cont.) Scroll to the desired Channel option, as listed in Table 2. Table 2: Channel Options Option Description Channel 1 Channel 2 CH1+CH2 CH1-CH2 (CH1+CH2)/2 For each channel, select the desired Measurement Parameter, as shown in Table 3. Note: The measurement units that appear in these prompts are those selected in the GLOBL-SYSTM menu earlier in this section.

  • Page 27: Viewing Diagnostic Parameters Using Panaview

    Chapter 3. Diagnostics 3.2.2 Viewing Diagnostic Parameters Using PanaView Power up the XMT868i and wait until it has initialized. Launch PanaView and wait until it initializes the XMT868i and displays the basic PanaView window. 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.
  • Page 28 Chapter 3. Diagnostics Table 3: Available Diagnostic Parameters Keypad Parameter PanaView Choice Parameter Choice Description Good SS up UP Sig Strength Signal strength for the upstream transducer. 50–75 <50 or >75 SS do DN Sig Strength Signal strength for the downstream transducer. 50–75 <50 or >75 Soundspeed...

  • Page 29: Diagnostic Record

    Chapter 3. Diagnostics Table 3: Available Diagnostic Parameters Keypad Parameter PanaView Choice Parameter Choice Description Good DENSr Return Dens Displays the density for the return input (energy N.A. N.A. measurement). DELTh Delta h Displays the delta enthalpy which is the difference N.A.

  • Page 30: Flowcell Problems

    Chapter 3. Diagnostics 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.

  • Page 31: Pipe Problems

    Chapter 3. Diagnostics 3.4.2 Pipe Problems Pipe-related problems may result either from a failure to observe the installation instructions, as described in the Startup Guide, or from improper programming of the meter. By far, the most common pipe problems are the following: The collection of material at the transducer location(s).

  • Page 32: Transducer Problems

    Chapter 3. Diagnostics 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.

  • Page 33: Clamp-On Transducer Problems

    Chapter 3. Diagnostics 3.5.2 Clamp-on Transducer Problems 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.
  • Page 34 Chapter 3. Diagnostics DigitalFlow™ XMT868i Service Manual...

  • Page 35: Chapter 4. Parts Replacement

    Chapter 4. Parts Replacement Chapter 4. Parts Replacement Introduction The Model XMT868i has been designed to permit easy on-site upgrades and parts replacement. See Figure 7 on page 11 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 the following tasks: •...

  • Page 36: Removing The Circuit Board Assembly

    Chapter 4. Parts Replacement Removing the Circuit Board Assembly All parts replacement 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.

  • Page 37: Replacing The Lcd Display/Interconnect Board Subassembly

    Chapter 4. Parts Replacement 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 display, see Figure 8 on page 12 for the component locations, and complete the following steps: Complete the steps in Removing the Circuit Board Assembly on page 2.

  • Page 38: Replacing The Fuse

    Chapter 4. Parts Replacement 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: Complete the steps in Removing the Circuit Board Assembly on page 2.

  • Page 39: Replacing The User Program

    Chapter 4. Parts Replacement Replacing the User Program The Model XMT868i’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.

  • Page 40: Installing An Option Card

    Chapter 4. Parts Replacement 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 13 and complete the following steps: Complete the steps in the Removing the Circuit Board Assembly section on page 2.

  • Page 41: Attaching An Optional Heat Sink To An I/O Option Card

    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 Startup Guide), refer to Illustration 9 in Figure 9 on page 13 and complete the following steps: Orient the thermal heat pad(s) to the heat sink as shown in Figure 9 on page 13 and apply it to the heat sink.

  • Page 42: Assembling/Installing The Circuit Board Assembly

    Chapter 4. Parts Replacement 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.

  • Page 43: Installing The Circuit Board Assembly

    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 11 and install the circuit board assembly into the electronics enclosure as follows: Slide the terminal board end of the circuit board assembly into the front of the electronics enclosure.
  • Page 44 Chapter 4. Parts Replacement DigitalFlow™ XMT868i Service Manual...
  • Page 45 Chapter 4: Parts Replacement Set Screw Set Screw Rear Cover (solid) Front Cover with Window Illustration 1 Electronics Assembly Enclosure Assembly Mounting Screw with Washer Assembly (4 places) Terminal Block on Slot 2 Option Card Ground Screw Label Plate with Ground Symbol Grounding Jumper Wire Illustration 2...
  • Page 46 Chapter 4: Parts Replacement Mounting Screw and Fuse Cover DC Power Supply Board Washer Assembly (3 places) P9 Connector on Terminal Board LCD Display, connects to Keypad Board and J10 Connector on Main Board Interconnect Board J2 Connector Sub-Assembly P1 Connector Bracket Screw Green Grounding Jumper P4 Connector...
  • Page 47 Chapter 4: Parts Replacement Screw with Washer Assembly and Mating Nut (not shown) I/O Heatsink Bridge (2 places) Gap Filler (white surface Power Supply Heatsink facing the Bridge) Screw, Lock Washer and Flat Washer (2 places) Screw with Washer Assembly (3 places) Gap Filler Power Supply Board (white surface...
  • Page 48 Chapter 4: Parts Replacement DigitalFlow™ XMT868i Service Manual...

  • Page 49: Appendix A. Service Record

    Appendix A. Service Record Appendix A. Service Record 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.
  • Page 50 Appendix A. Service Record Table 6: Service Record Date Description of Service Performed By DigitalFlow™ XMT868i Service Manual...

  • Page 51: Diagnostic Parameters

    Appendix A. Service Record A.2.1 Diagnostic Parameters After a successful initial installation of the Model XMT868i and whenever any system malfunction is noticed, the values for the diagnostic parameters should be entered in Table 7. Table 7: Diagnostic Parameters Parameter Initial Current Parameter...
  • Page 52 Appendix A. Service Record DigitalFlow™ XMT868i Service Manual...

  • Page 53: Appendix B. Calibration And Testing With Panaview

    Appendix B. Calibration and Testing with PanaView Appendix B. Calibration and Testing with PanaView 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, and XMT hardware and software is discussed. The chapter includes the following specific topics: •...

  • Page 54: Calibrating Slot 0 Analog Outputs

    Appendix B. Calibration and Testing with PanaView To enter data into the user program, double-click on the Calibration/Test menu. The window appears similar to Figure 11. 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.
  • Page 55 Appendix B. Calibration and Testing with PanaView From the Calibration/Test menu (see Figure 11 on page 20), double-click on the Calibration entry to open the option. In the 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.Double-click on either Output A or Output B to open the Analog Output menu.

  • Page 56: Calibrating Slot 1 Option Cards

    Appendix B. Calibration and Testing with PanaView 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 20. In the 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.

  • Page 57: Analog Outputs

    Appendix B. Calibration and Testing with PanaView 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.

  • Page 58: Analog Inputs

    Appendix B. Calibration and Testing with PanaView B.4.2 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.

  • Page 59: Rtd Inputs

    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.

  • Page 60: Testing Alarm Relays

    Appendix B. Calibration and Testing with PanaView B.4.4 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. Prepare for the testing procedure by connecting an ohmmeter to Alarm A of the option card.

  • Page 61: Testing Totalizer Outputs

    Appendix B. Calibration and Testing with PanaView B.4.5 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.

  • Page 62: Testing Xmt868I Software And Hardware

    Appendix B. Calibration and Testing with PanaView Testing XMT868i Software and Hardware In addition to calibration procedures for input and output cards, the Calibration/Test menu offers tests for XMT868i hardware and procedures for uploading signal array data and XMT memory contents into PC files for examination. To test XMT868i hardware and software, Open the Meter Browser window and highlight the XMT868i.
  • Page 63 Appendix B. Calibration and Testing with PanaView B.5.1 Uploading Signal Array Data (cont.) PanaView now offers two options for Uploading the array data. • If you double-click on To Display, the right pane of the window appears similar to Figure 13, and the data is available for immediate evaluation.

  • Page 64: Uploading Xmt868I Memory

    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 is another diagnostic tool. IMPORTANT: Consult GE before using this data to change any parameters. In the Calibration/Test menu, double-click on the Upload XMT Memory option. The first prompt shows the Hex Start Address.

  • Page 65: Testing Xmt868I Hardware

    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 number of channels (either 1 or 2). IMPORTANT: Contact GE if the XMT868i fails any of the tests covered below.
  • Page 66 Appendix B. Calibration and Testing with PanaView DigitalFlow™ XMT868i Service Manual...

  • Page 67: Appendix C. Factory Tests

    Appendix C. Factory Tests Appendix C. Factory Tests C.6 Introduction For user security, the XMT868i 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.
  • Page 68 Appendix C. Factory Tests The previous two prompts repeat until all of the specified # of LCD Parameters 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.
  • Page 69 Index Numerics EPROM 20 mA Option, Analog Inputs 5, 24 Replacing 5 Test 31 4 mA Option, Analog Inputs 5, 24 User Program 5 Error Codes Alarm Option Card, Testing 7 E13 - Volumetric Overflow 3 E0 - No Error 2 Alarm Relays, Testing 26 E1 - Low Signal 2 Ammeter, in Calibration 2...
  • Page 70 Index Transducers Option Card Corrosion 8 Cycle Skip 9 Alarm Relay 7 Internal Damage 8, 9 Analog Inputs 4 Leaks 8 Analog Outputs 2, 23, 24, 25 Misalignment 9 Bracket 6 Physical Damage 8, 9 Calibrating 22 Placement 7 Expansion Slots 1, 19 Poor Coupling 9 Frequency Outputs 10 Problems 8...
  • Page 71 Notify Panametrics 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, Panametrics will issue a RETURN AUTHORIZATION NUMBER (RAN), and shipping instructions for the return of the instrument to a service center will be provided.
  • Page 72 Warranty [no content intended for this page] DigitalFlow™ XMT868i Service Manual...
  • Page 74 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: mstechsupport@bakerhughes.com Ireland Sensing House Shannon Free Zone East Shannon, County Clare Ireland Tel: +353 (0)61 470291 E-mail: mstechsupport@bakerhughes.com Copyright 2021 Baker Hughes company.

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