Troubleshooting
If the slug flow condition clears before the
•Outputs that represent flow rate revert to reporting actual flow.
•The slug flow alarm is deactivated, but remains in the active alarm log until it is acknowledged.
If the slug flow condition does not clear before the
If slug time is configured for 0.0 seconds, outputs that represent flow rate will report zero flow as soon as slug flow is detected.
If slug flow occurs:
•Check process for cavitation, flashing, or leaks.
•Change the sensor orientation.
•Monitor density.
•If desired, enter new slug flow limits (see Section 6.10).
•If desired, increase slug duration (see Section 6.10).
11.18Checking output saturation
If an output variable exceeds the upper range limit or goes below the lower range limit, the applications platform produces an output saturation alarm. The alarm can mean:
•The output variable is outside appropriate limits for the process.
•The unit of flow needs to be changed.
•Sensor flow tubes are not filled with process fluid.
•Sensor flow tubes are plugged.
If an output saturation alarm occurs:
•Bring flow rate within sensor limit.
•Check the measurement unit. You may be able to use a smaller or larger unit.
•Check the sensor:
-Ensure that flow tubes are full.
-Purge flow tubes.
•For the mA outputs, change the mA URV and LRV (see Section 4.5.2).
11.19Checking the flow measurement unit
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 4.4.
11.20Checking the upper and lower range values
A saturated mA output or incorrect mA measurement could indicate a faulty URV or LRV. Verify that the URV and LRV are correct and change them if necessary. See Section 4.5.2.
104 | Micro Motion® Model 1500 Transmitters with the Filling and Dosing Application |
