Filter
Top Products
Configuration and Use Manual 95
Troubleshooting
Troubleshooting DisplayDiagramsOperation
6.7 Output problems
Micro Motion suggests that you make a record of the process variables listed below, under normal
operating conditions. This will help you recognize when the process variables are unusually high
or low.
• Flow rate
• Density
•Temperature
• Tube frequency
• Pickoff voltage
•Drive gain
For troubleshooting, check the process variables under both normal flow and tubes-full no-flow
conditions. Except for flow rate, you should see little or no change between flow and no-flow
conditions. If you see a significant difference, record the values and contact the Micro Motion
Customer Service Department for assistance.
Unusual values for process variables may indicate a variety of different problems. Table 6-3 lists
several possible problems and remedies.
Table 6-3 Output problems and possible remedies
Symptom Cause Possible remedies
No output or incorrect process
variable
CHANNEL parameter set incorrectly Verify the CHANNEL parameter in the AI
block matches the correct transducer
block measurement channels.
Steady non-zero flow rate under
no-flow conditions
Misaligned piping (especially in new
installations)
Correct the piping.
Open or leaking valve Check or correct the valve mechanism.
Bad sensor zero Rezero the flowmeter. See Section 3.6.
Bad flow cal factor Verify characterization. See Section 6.7.4.