Possible causes and recommended actions for excessive (saturated)
drive gain (continued)
Table 14-11:
Possible cause Recommended actions
Drive board or module failure Contact Micro Motion.
Vibrating element not free to
vibrate
Ensure that the vibrating element is free to vibrate.
Open drive coil Contact Micro Motion.
Incorrect sensor characteriza-
tion
Verify the characterization or calibration parameters.
Erratic drive gain
Possible causes and recommended actions for erratic drive gainTable 14-12:
Possible cause Recommended actions
Foreign material caught on vi-
brating element or in sensor
Ensure that the vibrating element is free to vibrate.
14.22.2 Collect drive gain data
Drive gain data can be used to diagnose a variety of process and equipment conditions.
Collect drive gain data from a period of normal operation, and use this data as a baseline
for troubleshooting.
1. Navigate to the drive gain data.
2. Observe and record drive gain data over an appropriate period of time, under a
variety of process conditions.
14.23
Check the pickoff voltage
If the pickoff voltage readings are unusually low, you may have any of a variety of process
or equipment problems.
To know whether your pickoff voltage is unusually low, you must collect pickoff voltage
data during the problem condition and compare it to pickoff voltage data from a period of
normal operation.
Troubleshooting
Configuration and Use Manual 169
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