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100 Micro Motion
®
Model 1500 Transmitters with the Filling and Dosing Application
Troubleshooting
Inaccurate flow rate or fill total Bad flow calibration factor Verify characterization. See
Section 4.2.
Inappropriate measurement unit Check configuration. See
Section 11.19.
Bad sensor zero Rezero the flowmeter. See Section 3.5.
Bad density calibration factors Verify characterization. See
Section 4.2.
Bad flowmeter grounding See Section 11.14.3.
Slug flow See Section 11.17.
Problem with receiving device See Section 11.16.
Wiring problem Verify all sensor-to-transmitter wiring
and ensure the wires are making good
contact.
Inaccurate density reading Problem with process fluid Use standard procedures to check
quality of process fluid.
Bad density calibration factors Verify characterization. See
Section 4.2.
Wiring problem Verify all sensor-to-transmitter wiring
and ensure the wires are making good
contact.
Bad flowmeter grounding See Section 11.14.3.
Slug flow See Section 11.17.
Sensor cross-talk Check environment for sensor with
similar (±0.5 Hz) tube frequency.
Plugged flow tube Check drive gain and tube frequency.
Purge the flow tubes.
Temperature reading significantly
different from process temperature
RTD failure Check for alarm conditions and follow
troubleshooting procedure for indicated
alarm.
Disable external temperature
compensation. See Figure C-1.
Temperature reading slightly different
from process temperature
Temperature calibration required Perform temperature calibration. See
Section 10.6.
Unusually high density reading Plugged flow tube Check drive gain and tube frequency.
Purge the flow tubes.
Incorrect K2 value Verify characterization. See
Section 4.2.
Unusually low density reading Slug flow See Section 11.17.
Incorrect K2 value Verify characterization. See
Section 4.2.
Unusually high tube frequency Sensor erosion Contact Micro Motion. See Section 1.8.
Unusually low tube frequency Plugged flow tube Purge the flow tubes.
Unusually low pickoff voltages Several possible causes See Section 11.23.5
.
Unusually high drive gain Several possible causes See Section 11.23.3.
Table 11-5 Process variables problems and possible remedies continued
Symptom Cause Possible remedy