Emerson Micro Motion 5700 Configuration And Use Manual page 203

Configuration and Use Manual
MMI-20029769
Recommended actions
1. Verify all of the characterization or calibration parameters.
See the sensor tag or the calibration sheet for your meter.
2. If the reading is not excessively high, review the live zero. You may need to restore the factory zero.
3. Check for open or leaking valves or seals.
4. Check for mounting stress on the sensor (e.g., sensor being used to support piping, misaligned piping).
5. Contact customer service.
17.9.3 Erratic non-zero flow rate at no-flow conditions
Cause
• Leaking valve or seal
• Two-phase flow
• Plugged or coated sensor tube
• Incorrect sensor orientation
• Wiring problem
• Vibration in pipeline at rate close to sensor tube frequency
• Damping value too low
• Mounting stress on sensor
Recommended actions
1. Verify that the sensor orientation is appropriate for your application.
See the installation manual for your sensor.
2. Check the drive gain and the pickoff voltage.
3. If the wiring between the sensor and the transmitter includes a 9-wire segment, verify that the 9-wire
cable shields are correctly grounded.
4. Check the wiring between the sensor and the transmitter.
5. For sensors with a junction box, check for moisture in the junction box.
6. Purge the sensor tubes.
7. Check for open or leaking valves or seals.
8. Check for sources of vibration.
9. Verify damping configuration.
10. Verify that the measurement units are configured correctly for your application.
11. Check for two-phase flow.
12. Check for radio frequency interference.
13. Contact customer service.
Configuration and Use Manual
Troubleshooting
March 2019
203