Emerson Micro Motion 1000 Series Configuration And Use Manual page 153

Troubleshooting
Table 12-6 Process variables problems and possible remedies continued
Symptom
Erratic non-zero flow rate when flow
is steady
Inaccurate flow rate or batch total
Inaccurate density reading
Configuration and Use Manual
Cause
Output wiring problem
Problem with receiving device
Inappropriate measurement unit
Inappropriate damping value
Excessive or erratic drive gain
Slug flow
Plugged flow tube
Wiring problem
Bad flow calibration factor
Inappropriate measurement unit
Bad sensor zero
Bad density calibration factors
Bad flowmeter grounding
Slug flow
Problem with receiving device
Wiring problem
Problem with process fluid
Bad density calibration factors
Wiring problem
Bad flowmeter grounding
Slug flow
Sensor cross-talk
Plugged flow tube
Possible remedy
Verify wiring between transmitter and
receiving device. See the installation
manual for your transmitter.
Test with another receiving device.
Check configuration. See
Section 12.20.
Check damping configuration.
See Section 12.25.3 and
.
Section 12.25.4
See Section 12.17.
Check drive gain and tube frequency.
Purge the flow tubes or replace the
sensor.
Verify all sensor-to-transmitter wiring
and ensure the wires are making good
contact.
Verify characterization. See
Section 6.2.
Check configuration. See
Section 12.20.
Rezero the meter. See Section 5.5.
Verify characterization. See
Section 6.2.
See Section 12.14.3.
See Section 12.17.
See Section 12.16.
Verify all sensor-to-transmitter wiring
and ensure the wires are making good
contact.
Use standard procedures to check
quality of process fluid.
Verify characterization. See
Section 6.2.
Verify all sensor-to-transmitter wiring
and ensure the wires are making good
contact.
See Section 12.14.3.
See Section 12.17.
Check environment for sensor with
similar (±0.5 Hz) tube frequency.
Check drive gain and tube frequency.
Purge the flow tubes or replace the
sensor.
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