Collect Pickoff Voltage Data; Check For Internal Electrical Problems; Check The Sensor Coils - Emerson Micro Motion 2700 Configuration And Use Manual

Troubleshooting
Table 9-3:
(continued)
Possible cause
The vibrating element is not vibrating
Moisture in the sensor electronics
The sensor is damaged, or sensor magnets
may have become demagnetized
9.10.1

Collect pickoff voltage data

Pickoff voltage data can be used to diagnose a variety of process and equipment
conditions. Collect pickoff voltage data from a period of normal operation, and use this
data as a baseline for troubleshooting.
Procedure
1.
2.
9.11

Check for internal electrical problems

Shorts between sensor terminals or between the sensor terminals and the sensor case can
cause the sensor to stop working.
Possible cause
Liquid or moisture inside the sensor case
Internally shorted feedthrough
Faulty cable
9.11.1

Check the sensor coils

Checking the sensor coils can identify a cause for a no sensor response alert.
Restriction
This procedure applies only to 9-wire remote-mount transmitters and remote transmitters with
remote core processors.
124
Possible causes and recommended actions for low pickoff voltage
Navigate to the pickoff voltage data.
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.
Micro Motion Model 2700 Transmitters with FOUNDATION Fieldbus
Recommended actions
• Check for plugging or deposition.
• Ensure that the vibrating element is free to vi-
brate (no mechanical binding).
Eliminate the moisture in the sensor electronics.
Replace the sensor.
Recommended action
Contact customer support.
Contact customer support.
Replace the cable.