Related Manuals for GE DigitalFlow DF968
Summary of Contents for GE DigitalFlow DF968
- Page 1 Sensing & Inspection Technologies DigitalFlow™ DF868 Panametrics Multipurpose Ultrasonic Liquid Flowmeter Service Manual...
- Page 3 Sensing & Inspection Technologies DigitalFlow™ DF868 Panametrics Multipurpose Ultrasonic Liquid Flowmeter Service Manual 910-176SD1 March 2008 The DigitalFlow DF868 is a GE Panametrics product. GE Panametrics has joined other GE high-technology businesses under a new name—GE Sensing & Inspection Technologies.
- Page 4 2. If GE instructs you to send your instrument to a service center, it must be shipped prepaid to the authorized repair station indicated in the shipping instructions.
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Page 5: Table Of Contents
March 2008 Table of Contents Chapter 1: Calibration Introduction ................1-1 Menu Map . - Page 6 March 2008 Table of Contents (cont.) Chapter 3: Diagnostics Introduction ................3-1 Displaying Diagnostic Parameters .
- Page 7 Chapter 1...
- Page 8 Calibration Introduction........... . 1-1 Menu Map .
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Page 9: Introduction
March 2008 Introduction Calibrating the Model DF868’s analog outputs and inputs is explained in this chapter. In addition, testing the optional totalizer/ frequency and alarm relay outputs is discussed. The following specific topics are included: • calibrating the built-in Slot 0 analog outputs •... -
Page 10: Calibrating The Analog Outputs
March 2008 Calibrating the Analog Every Model DF868 flowmeter includes two built-in analog outputs Outputs Slot 0 (A and B) at terminal block , which is designated as . 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 μA (0.03% full scale), their linearity should be tested. -
Page 11: Accessing The Calibration Menu
March 2008 Accessing the Calibration Menu Terminal Block (Option Card) Ammeter – Figure 1-2: Ammeter Connection (Output A) [CAL] 1. Press the key to enter the Calibration Program. [Fx] 2. Press to calibrate the desired slot. (The option bar will include a slot listing for each installed option card.) [Fx] 3. -
Page 12: Calibrating The High End Of The Output Range
March 2008 Calibrating the High End [F2] 1. Press to calibrate the high end of the output range. of the Output Range [F1] [F2] DOWN 2. Press to adjust the ammeter reading , until [F3] Numer a 20 mA reading is achieved. If you press , enter the [ENT] numeric value and press... - Page 13 March 2008 Procedure Options You have completed calibration of the analog output. Do one of the following: • EXIT) To calibrate or test another output, press and return to Step 3 in Accessing the Calibration Menu on page 1-3. • EXIT) To calibrate/test additional slots, press twice and...
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Page 14: Calibrating The Analog Inputs
March 2008 Calibrating the Analog Analog inputs may be added to the Model DF868 flowmeter by Inputs installing an Analog Inputs Option Card in one (or more) of the six expansion slots. The option card contains two analog inputs, which are designated as A and B. -
Page 15: Accessing The Calibration Menu
March 2008 Calibrating the Analog For this discussion, assume that the option card has been installed in Inputs (cont.) Slot x Note: The zero point of the analog input may be set for either 0 mA or 4 mA. However, the calibration procedure always uses the 4 mA point, as the meter will extrapolate this value to obtain the 0 mA point. -
Page 16: Alow Option = [F1]
March 2008 aLOW Option = [F1] [ENT] 1. Enter the low reference value and press the key. [F1] [F2] 2. Press to store the current low reference value or press ANALOG INPUT cancel the entry. In either case, the prompt will reappear. -
Page 17: Calibrating The Rtd Inputs
March 2008 Calibrating the RTD Calibrating an RTD option card involves a slightly different Inputs procedure than for other analog input cards. However, you access the card in the same manner. Accessing the Calibration [CAL] 1. Press the key to enter the Calibration Program. Menu [Fx] 2. -
Page 18: Alarms Option Card
March 2008 Alarms Option Card Alarm relays may be added to the Model DF868 by installing an Alarms Option Card in one (or more) of the six expansion slots. Each option card includes three alarm relays, which are designated as A, B, and C. - Page 19 March 2008 Testing the Alarm Relays Note: The procedure for testing Alarm Relay A is identical to that for (cont.) Alarm Relays B and C testing . However, make sure that the ohmmeter is connected to the desired normally-open or normally-closed contact of the currently selected relay.
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Page 20: Totalizer/Frequency Option Card
March 2008 Totalizer/Frequency Totalizer/Frequency outputs may be added to the Model DF868 by Option Card installing a Totalizer/Frequency Option Card in one (or more) of the six expansion slots. Each option card includes four outputs, which are designated as A, B, C and D. To test the outputs, connect a frequency counter to the card’s terminal block as shown in Figure 1-5 below. -
Page 21: Entering Pulse Number
March 2008 Entering Pulse Number 5. Enter the number of pulses desired (between 1 and 10,000) and [ENT] press the key. That number of pulses will then be output at the specified frequency. 6. Repeat steps 3, 4 and 5 to test all four of the frequency/totalizer outputs. - Page 22 March 2008 SLOT0 SLOT1 SLOT2 SLOT3 SLOT4 SLOT5 SLOT6 Slot x (Option Card) Slot 0 Outputs (TB I/O) Slot x Inputs (Analog Inputs) Slot x Outputs (Alarms) ANALOG OUTPUT ANALOG INPUT ALARMS 4 mA 20 mA TEST EXIT aLOW aHIGH 4 mA 20 mA EXIT...
- Page 23 Chapter 2...
- Page 24 Error Codes and Screen Messages Introduction........... . 2-1 E0: No Error .
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Page 25: Chapter 2: Error Codes And Screen Messages
March 2008 Introduction The Model DF868 ultrasonic flowmeter is a reliable, easy to maintain instrument. When properly installed and operated, as described in the Startup Guide, the meter provides accurate flow rate measurements with minimal user intervention. However, if a problem should arise with the electronics console, the transducers or the flowcell, a built-in error code message system greatly simplifies the troubleshooting process. -
Page 26: E0: No Error
March 2008 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 via the User Program. -
Page 27: E4: Signal Quality
March 2008 E4: Signal Quality Problem: The signal quality is outside the limits programmed in the SETUP submenu of the User Program. Cause: Too high a signal strength may be caused by the failure of an electronic component. Too low a signal strength may be caused by a flowcell or electrical problem. -
Page 28: E8: Temp In Supply
March 2008 E8: Temp In Supply Problem: This message indicates a temperature input supply error. Cause: The temperature exceeds the specified limits for the analog inputs option card. Action: Check the temperature transmitter and the connecting cable. Refer to Chapter 1, Calibration, and recalibrate the analog inputs on the option card (page 1-6). -
Page 29: E13: Over Range
March 2008 E13: Over Range Problem: This error code message indicates that the present measurement exceeds the capacity 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. -
Page 30: Screen Messages
March 2008 Screen Messages A variety of messages may appear on the display screen during the performance of a task. Since the error codes have already been discussed in this chapter and the locator bar messages are discussed in detail in Chapter 3, Operation, of the Startup Guide, they will not be repeated here. - Page 31 March 2008 Table 2-1: Screen Messages Message Meaning Log Active, END only When in the LOG menu, this message indicates that the log is still compiling hit any key data. Only the End Time may be edited. Log DONE, When in the LOG menu, this message indicates that the log is complete. Hit to inspect hit any key any key to display the log.
- Page 32 Chapter 3...
- Page 33 Diagnostics Introduction........... . 3-1 Displaying Diagnostic Parameters.
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Page 34: Chapter 3: Diagnostics
March 2008 Introduction This chapter explains how to troubleshoot the Model DF868 if problems arise with the electronics console, the flowcell, or the transducers. Indications of a possible problem include: • display of an error message on the active display screen •... - Page 35 March 2008 Displaying Diagnostic displays the Tdown parameter, as shown in [F1] For example, pressing Parameters (cont.) the following prompt. (Ch1) label gSITE ‰ Press the [←] and [→] keys and [Fx] Ch1 DN Transit usec the appropriate key to display a different diagnostic 519.7 EXIT...
- Page 36 March 2008 Table 3-1: Available Diagnostic Parameters (Continued) Option Bar Screen Display Description Good AMPup UP Amp Discrim Displays the value for the amplitude 24 ± 5 <19 or >29 discriminator of upstream transducer. AMPdn DN Amp Discrim Displays the value for the amplitude 24 ±...
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Page 37: Diagnostic Record
March 2008 Diagnostic Record [EXIT] EXIT Upon leaving the Diagnostic Menu via the key or the option on the option bar, the display screen will continue to show the last diagnostic parameter that was selected. To return to normal measurement mode, select a channel to display (for a 2-Channel meter only) and then select the desired display parameter. -
Page 38: Flowcell Problems
March 2008 Flowcell Problems If preliminary troubleshooting with the Error Code Messages and/or the Diagnostic Menu indicates a possible flowcell problem, proceed with this section. Flowcell problems fall into two categories: • liquid problems • pipe problems. Read the following sections carefully to determine if the problem is indeed related to the flowcell. -
Page 39: Pipe Problems
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. -
Page 40: Transducer Problems
March 2008 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. -
Page 41: Clamp-On Transducer Problems
March 2008 Clamp-on Transducer 1. POOR COUPLING TO PIPE: Clamp-on transducers must be in Problems 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 42 Chapter 4...
- Page 43 Parts Replacement Introduction........... . 4-1 Fuse Replacement .
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Page 44: Chapter 4: Parts Replacement
March 2008 Introduction The electronics console of the Model DF868 has been designed to permit easy on-site upgrades and parts replacement. See Figure 4-1 on page 4-10 and Figure 4-2 on page 4-11 for details of the standard DF868 electronics console assembly. The instructions in this chapter, along with a few common tools, are all that is required to perform the following tasks: •... -
Page 45: Fuse Replacement
March 2008 Fuse Replacement If it has been determined that the fuse in the Model DF868 requires replacement, complete the following steps: !WARNING! The main power to the Model DF868 must be disconnected before proceeding. 1. Open the cover on the electronics console. For LVD compliant units, remove the two mounting screws and lift the clear plastic shroud out of the electronics console. -
Page 46: Removing The Printed Circuit Board
March 2008 Removing the Printed All of the remaining maintenance procedures discussed in this Circuit Board chapter require removal of the printed circuit board. Refer to Figure 4-1 on page 4-10 and Figure 4-2 on page 4-11 while completing the following tasks: 1. -
Page 47: Replacing The Eprom
March 2008 Removing the Printed If the printed circuit board is being replaced, proceed to the section on Circuit Board (cont.) Installing the Printed Circuit Board (page 4-7) now. Otherwise, refer to the appropriate section for instructions on Installing an Option Card (page 4-5), Replacing the EPROM (below), or Replacing the LCD Display (page 4-6). -
Page 48: Installing An Option Card
March 2008 Installing an Option Card The Model DF868 flowmeter can accommodate up to six option cards. The option cards are installed into sockets on the rear of the printed circuit board, and they are held in place with a metal bracket. A single metal bracket is used to secure all the installed option cards. -
Page 49: Replacing The Lcd Display
March 2008 Replacing the LCD The Model DF868’s measurements are displayed on a a two-pane Display LCD graphic display panel. The LCD display normally provides years of dependable service, but it is easily field-replaceable when necessary. To replace the LCD display, see Figure 4-1 on page 4-10 for the component locations, and complete the following steps: 1. -
Page 50: Installing The Printed Circuit Board
March 2008 Installing the Printed Whether the printed circuit board was removed for replacement or for Circuit Board one of the other procedures discussed in this chapter, reinstallation of the printed circuit board is the final step in the process. Refer to Figure 4-1 on page 4-10 and complete the following steps: Caution! During this procedure, be very careful not to damage the... - Page 51 March 2008 Installing the Printed 5. Connect the twisted-pair backlight cable to socket on the left Circuit Board (cont.) edge of the printed circuit board. This plug is polarized so that it can only be installed in the proper orientation, with the black wire above the red wire.
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Page 52: Spare Parts
March 2008 Spare Parts All of the necessary components to upgrade or repair the Model DF868 flowmeter are readily available from GE. As a convenient reference, some of the more common spare parts are listed below in Table 4-2. Table 4-2: Spare Parts List... - Page 53 March 2008 FRONT VIEW – G N/L2 L1 SIDE VIEW BOTTOM VIEW Parts Replacement 4-10...
- Page 54 March 2008 – N/L2 Parts Replacement 4-11...
- Page 55 Appendix A...
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Page 56: Appendix A: Service Record
Service Record Introduction........... . A-1 Data Entry . -
Page 57: Introduction
March 2008 Introduction Whenever any service procedure is performed on the Model DF868 flowmeter, the details of the service should be recorded in this appendix. An accurate service history of the meter can prove very helpful in troubleshooting any future problems. Data Entry Record complete and detailed service data for the Model DF868 in Table A-1 below. - Page 58 March 2008 Table A-1: Service Record (Continued) Date Description of Service Performed By Service Record...
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Page 59: Diagnostic Parameters
March 2008 Diagnostic Parameters After a successful initial installation of the Model DF868 and whenever any system malfunction is noticed, the values for the diagnostic parameters should be entered in Table A-2 below. Table A-2: Diagnostic Parameters Parameter Initial Current Parameter Initial Current... - Page 60 Appendix B...
- Page 61 Optional Enclosures Introduction........... . B-1 Rack Mount Enclosure.
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Page 62: Appendix B: Optional Enclosures
March 2008 Introduction The Model DF868 is available in optional enclosure types, each of which has been designed to permit easy on-site upgrades and parts replacement. See the foldout drawings at the end of this appendix for details of the applicable DF868 electronics console assembly. The instructions in this appendix, along with a few common tools, are all that is required to perform the following tasks: •... -
Page 63: Rack Mount Fuse Replacement
March 2008 Rack Mount Fuse If it has been determined that the fuse in the Model DF868 requires Replacement replacement, refer to Figure B-1 on page B-10 and Figure B-2 on page B-11, and complete the following steps: 1. On the rear panel of the meter, set the power switch to the OFF position and pull the power cord out of its receptacle. -
Page 64: Rack Mount Option Card Installation
March 2008 Rack Mount Option Card The Model DF868 flowmeter can accommodate up to six option Installation cards in a manner similar to that used in a PC. The option cards are installed into sockets on the printed circuit board, and they are held in place with a metal bracket. -
Page 65: Rack Mount Option Card Installation
March 2008 Rack Mount Option Card 6. Place the metal bracket over the option cards, making sure that all Installation (cont.) installed option cards are inserted into the plastic card guides in the bracket. The bracket must be oriented so that the six card guides are directly above the six sockets on the printed circuit board (do not install the bracket rotated 180°... -
Page 66: Rack Mount Eprom Replacement
March 2008 Rack Mount EPROM The Model DF868’s User Program is stored on an erasable Replacement programmable read only memory (EPROM) chip. The EPROM, which is designated as component , is located on the corner of the printed circuit board just behind the keypad on the front panel. EPROM replacement may be required to replace a defective chip or to upgrade to a newer software version. -
Page 67: Rack Mount Lcd Display Replacement
March 2008 Rack Mount LCD Display The Model DF868 measurements are displayed on a two-pane LCD Replacement graphic display panel. The LCD display normally provides years of dependable service, but it is field-replaceable when necessary. To replace the LCD display, refer to Figure B-2 on page B-11 and complete the following steps: !WARNING! The main power to the Model DF868 must be... -
Page 68: Rack Mount Printed Circuit Board Replacement
March 2008 Rack Mount LCD Display 7. Fasten the display shroud to the front panel with the four sets of Replacement (cont.) nuts/washers. Caution! Do not overtighten the nuts or damage to the mounting threads may occur. 8. After checking for any loose hardware that may have fallen into the enclosure, reinstall the top panel on the meter and secure the panel in place with the four screws previously removed. -
Page 69: Circuit Board Installation
March 2008 Circuit Board Removal Note: These connectors should be pulled straight up and off the (cont.) printed circuit board. DO NOT remove the leads from the screw terminals. KEYPAD CABLE 5. Remove the flat connector from terminal J50 near the front of the printed circuit board. - Page 70 March 2008 Circuit Board Installation RS232 ANALOG OUT TRANSDUCER 5. Install the connectors onto (cont.) the printed circuit board at the locations indicated in Figure B-2 on page B-11. Make sure the marked pin #1 sides of the connectors face the right side (keypad side) of the enclosure. Note: If any leads have come loose from the screw terminals on these connectors, refer to Appendix C, Optional Enclosures, of the Startup Guide for wiring instructions.
- Page 71 March 2008 Fuse 14.83 (377) 16.99 (432) 4.19 (106) 11.82 11.37 (300) (289) 13.13 (333) 15.70 (399) 3.31 (84) 2.25 5.22 (57) (133) DF868 18.25 (464) 19.00 (483) Optional Enclosures B-10...
- Page 72 March 2008 Optional Enclosures B-11...
- Page 73 March 2008 Index Acceleration Error - E6 ....2-3 EPROM Alarms Option Card, Testing ... . 1-10 Replacing .
- Page 74 March 2008 Index (cont.) Option Card Temperature Input Return Error - E8 ..2-4 Bracket ......4-5 Temperature Input Supply Error - E8 .
- Page 75 DECLARATION Sensing CONFORMITY Panametrics Limited Shannon Industrial Estate Shannon, County Clare Ireland declare under our sole responsibility that the DF868 Liquid Ultrasonic Flowmeter GF868 Flare Gas Ultrasonic Flowmeter GM868 Multi-Purpose Gas Ultrasonic Flowmeter GN868 Natural Gas Ultrasonic Flowmeter GS868 Steam Mass Ultrasonic Flowmeter to which this declaration relates, are in conformity with the following standards: •...
- Page 76 DECLARATION Sensing CONFORMITE Panametrics Limited Nous, Shannon Industrial Estate Shannon, County Clare Ireland déclarons sous notre propre responsabilité que les DF868 Liquid Ultrasonic Flowmeter GF868 Flare Gas Ultrasonic Flowmeter GM868 Multi-Purpose Gas Ultrasonic Flowmeter GN868 Natural Gas Ultrasonic Flowmeter GS868 Steam Mass Ultrasonic Flowmeter rélatif á...
- Page 77 KONFORMITÄTS- Sensing ERKLÄRUNG Panametrics Limited Wir, Shannon Industrial Estate Shannon, County Clare Ireland erklären, in alleiniger Verantwortung, daß die Produkte DF868 Liquid Ultrasonic Flowmeter GF868 Flare Gas Ultrasonic Flowmeter GM868 Multi-Purpose Gas Ultrasonic Flowmeter GN868 Natural Gas Ultrasonic Flowmeter GS868 Steam Mass Ultrasonic Flowmeter folgende Normen erfüllen: •...
- Page 78 1100 Technology Park Drive Billerica, MA 01821-4111 Web: www.gesensing.com Ireland Sensing House Shannon Free Zone East Shannon, County Clare Ireland...