Emerson Micro Motion 2500, Configuration And Use Manual

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Problem Possible causes Recommended actions
Inaccurate flow rate
or batch total • Wiring problem
• Inappropriate measurement unit
• Incorrect flow calibration factor
• Incorrect meter factor
• Incorrect density calibration factors
• Incorrect grounding
• Two-phase flow
• Problem with receiving device
• Incorrect sensor zero
• Check the wiring between the sensor and
the transmitter.
• Verify that the measurement units are con-
figured correctly for your application.
• Verify all of the characterization or calibra-
tion parameters. See the sensor tag or the
calibration sheet for your meter.
• Perform a bucket test to verify batch to-
tals.
• Zero the meter.
• Check the grounding of all components.
• Check for two-phase flow.
• Verify the receiving device, and the wiring
between the transmitter and the receiving
device.
• Check sensor coil resistance and for shorts
to case.
• Replace the transmitter.
12.4 Density measurement problems
Problem Possible causes Recommended actions
Inaccurate density
reading • Problem with process fluid
• Incorrect density calibration factors
• Wiring problem
• Incorrect grounding
• Two-phase flow
• Plugged or coated sensor tube
• Incorrect sensor orientation
• RTD failure
• Physical characteristics of sensor have
changed
• Check your process conditions against the
values reported by the device.
• Ensure that all of the calibration parame-
ters have been entered correctly. See the
sensor tag or the calibration sheet for your
meter.
• Check the wiring between the sensor and
the transmitter.
• Check the grounding of all components.
• Verify all of the characterization or calibra-
tion parameters. See the sensor tag or the
calibration sheet for your meter.
• Check for two-phase flow.
• If two sensors with similar frequency are
too near each other, separate them.
• Purge the sensor tubes.
Troubleshooting
172 Micro Motion Model 2500 Transmitters with Configurable Input/Outputs