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Configuration and Use Manual 135
Troubleshooting
Measurement Performance DefaultsTroubleshootingCompensation
If slug flow occurs:
• Check the process for cavitation, flashing, or leaks.
• Change the sensor orientation.
• Monitor density.
• If desired, enter new slug flow limits (see Section 8.7).
- Raising the low slug flow limit or lowering the high slug flow limit will increase the
possibility of slug flow conditions.
- Lowering the low slug flow limit or raising the high slug flow limit will decrease the
possibility of slug flow conditions.
• If desired, increase slug duration (see Section 8.7).
11.15 Checking the sensor tubes
Corrosion, erosion, or damage to the sensor tubes can affect process measurement. To check for these
conditions, perform the meter verification procedure, if available. See Chapter 10. If the meter
verification procedure is not available, perform a visual inspection, or perform a density calibration
and check for a shift in the K1 and K2 values. Contact Micro Motion customer service.
11.16 Checking the flow measurement configuration
Using an incorrect flow measurement unit can cause the transmitter to produce unexpected output
levels, with unpredictable effects on the process. Make sure that the configured flow measurement
unit is correct. Check the abbreviations; for example, g/min represents grams per minute, not gallons
per minute. See Section 6.3.
11.17 Checking the characterization
A transmitter that is incorrectly characterized for its sensor might report inaccurate process variable
values. Both the K1 and Flow Cal (FCF) values must be appropriate for the sensor. If these values are
incorrect, the sensor may not drive correctly or may send inaccurate process data.
If you discover that any of the characterization data are wrong, perform a complete characterization.
See Section 6.2.
11.18 Checking the calibration
Improper calibration can cause the transmitter to report unexpected process variable values. If the
transmitter appears to be operating correctly but sends unexpected process variable values, an
improper calibration may be the cause.
Micro Motion calibrates every transmitter at the factory. Therefore, you should suspect improper
calibration only if the transmitter has been calibrated after it was shipped from the factory. Before
performing a calibration, consider meter validation or meter verification and select the appropriate
procedure (see Section 10.2). Contact Micro Motion customer service for assistance.