Emerson Micro Motion 2700 Configuration And Use Manual page 125

Problem Possible causes
Erratic non-zero flow •
rate at no-flow condi- •
tions •
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Erratic non-zero flow •
rate when flow is •
steady •
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•
Configuration and Use Manual
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
Two-phase flow
Damping value too low
Plugged or coated sensor tube
Output wiring problem
Problem with receiving device
Wiring problem
Recommended actions
• Verify that the sensor orientation is appro-
priate for your application (refer to the
sensor installation manual).
• Check the drive gain and the pickoff volt-
age.
• If the wiring between the sensor and the
transmitter includes a 9-wire segment,
verify that the 9-wire cable shields are cor-
rectly grounded.
• Check the wiring between the sensor and
the transmitter.
• For sensors with a junction box, check for
moisture in the junction box.
• Purge the sensor tubes.
• Check for open or leaking valves or seals.
• Check for sources of vibration.
• Verify damping configuration.
• Verify that the measurement units are con-
figured correctly for your application.
• Check for two-phase flow.
• Check for radio frequency interference.
• Contact customer support.
• Verify that the sensor orientation is appro-
priate for your application (refer to the
sensor installation manual).
• Check the drive gain and the pickoff volt-
age.
• If the wiring between the sensor and the
transmitter includes a 9-wire segment,
verify that the 9-wire cable shields are cor-
rectly grounded.
• Check for air entrainment, tube fouling,
flashing, or tube damage.
• Check the wiring between the sensor and
the transmitter.
• For sensors with a junction box, check for
moisture in the junction box.
• Purge the sensor tubes.
• Check for open or leaking valves or seals.
• Check for sources of vibration.
• Verify damping configuration.
• Verify that the measurement units are con-
figured correctly for your application.
• Check for two-phase flow.
• Check for radio frequency interference.
• Contact customer support.
Troubleshooting
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