Filter
Top Products
Possible causes and recommended actions for excessive (saturated)
drive gain (continued)
Table 10-8:
Possible cause Recommended actions
Incorrect sensor characteriza-
tion
Verify the characterization parameters.
Erratic drive gain
Possible causes and recommended actions for erratic drive gainTable 10-9:
Possible cause Recommended actions
Wrong K1 characterization constant for sensor Verify the K1 characterization parameter.
Polarity of pick-off reversed or polarity of drive reversed Contact Micro Motion.
Slug flow Check for slug flow. See Section 10.25.
Foreign material caught in flow tubes • Purge the flow tubes.
• Replace the sensor.
10.26.1 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.
Procedure
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.
10.27 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
174 Micro Motion
®
Model 1500 Transmitters with Analog Outputs