
Troubleshooting
Procedure
1.
Navigate to the picikoff voltage data:
• If you are using ProLink II, choose
ProLink→Diagnostic Information
.
• If you are using a Field Communicator, choose
Service Tools→Maintenance→Diagnostic Variables
2.
Observe and record data for both the left pickoff and the right pickoff, over an appropriate period of
time, under a variety of process conditions.
10.27
Check for electrical shorts
Table 10-11
Possible causes and recommended actions for electrical shorts
Possible cause
Recommended action
Moisture inside the junction box
Make sure the junction box is dry and no corrosion is
present.
Liquid or moisture inside the sensor case
Contact Micro Motion.
Internally shorted feedthrough
Contact Micro Motion.
Faulty cable
Replace the cable.
Improper wire termination
Verify wire terminations inside sensor junction box. The
Micro Motion document titled
9-Wire Flowmeter Cable
Preparation and Installation Guide
may offer some
assistance.
10.27.1
Check the sensor coils for 9-wire transmitter
Procedure
1.
Disconnect power to the transmitter
If the transmitter is in a hazardous area, wait 5 minutes.
2.
Remove the transmitter housing cover.
3.
Unplug the terminal blocks from the terminal board.
4.
Using a digital multimeter (DMM), check the pickoff coils listed in Table 10-12 by placing the DMM
leads on the unplugged terminal blocks for each terminal pair. Record the values.
Table 10-12
Coils and test terminal pairs
Coil
Sensor model
Terminal colors
Drive coil
All
Brown to red
Left pickoff coil (LPO)
All
Green to white
Right pickoff coil (RPO)
All
Blue to gray
Resistance temperature detector
(RTD)
All
Yellow to violet
Lead length compensator (LLC)
All except T-Series and CMF400
Yellow to orange
Composite RTD
T-Series
Yellow to orange
Fixed resistor
CMF400
Yellow to orange
198
Micro Motion 9739 MVD Transmitters
Содержание Micro Motion 9739 MVD
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Страница 30: ...Quick start with the display OFFLINE MAINT RESTORE ZERO RESTORE YES 24 Micro Motion 9739 MVD Transmitters ...
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Страница 207: ...Appendices and reference ...
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Страница 230: ...Using the transmitter display Figure C 4 Offline menu version information 224 Micro Motion 9739 MVD Transmitters ...
Страница 231: ...Using the transmitter display Figure C 5 Offline menu configuration units and I O Configuration and Use Manual 225 ...
Страница 233: ...Using the transmitter display Figure C 7 Offline menu configuration display Configuration and Use Manual 227 ...
Страница 234: ...Using the transmitter display Figure C 8 Offline menu Simulation loop testing 228 Micro Motion 9739 MVD Transmitters ...
Страница 236: ...Using the transmitter display Figure C 10 Offline menu Zero 230 Micro Motion 9739 MVD Transmitters ...
Страница 239: ...Using ProLink II with the 9739 MVD transmitter Figure D 2 Configuration menu Configuration and Use Manual 233 ...
Страница 241: ...Using ProLink II with the 9739 MVD transmitter Figure D 4 Configuration menu continued Configuration and Use Manual 235 ...
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Страница 245: ...Using the Field Communicator with the 9739 MVD transmitter Figure E 2 Overview menu Configuration and Use Manual 239 ...