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Emerson Rosemount 8750W - Troubleshooting the SMART Meter Verification Test

Emerson Rosemount 8750W
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169
Reference Manual
00809-0300-4750, Rev CA
Troubleshooting
March 2016
Troubleshooting
9.4.6 Troubleshooting the SMART Meter Verification test
In the event that the SMART Meter Verification test fails, use the following table to
determine the appropriate course of action. Begin by reviewing the SMART Meter
Verification results to determine the specific test that failed.
Table 9-6. Troubleshooting the SMART Meter Verification Diagnostic
Test Potential cause Corrective action
Transmitter
Verification
Test
Unstable flow reading during the
test
Noise in the process
Transmitter drift
Faulty electronics
Rerun SMART Meter Verification (8714i) under No Flow
conditions.
Check the transmitter calibration with the 8714D
Calibration Standard.
Perform a digital trim.
Replace the electronics stack.
Sensor
Calibration
Verification
Moisture in the sensor terminal
block
Calibration shift caused by heat
cycling or vibration
Rerun SMART Meter Verification (8714i).
Perform the sensor checks detailed in “Sensor” on
page 158.
Remove the sensor and send back for evaluation and/or
recalibration.
Coil Circuit
Health
Moisture in the sensor terminal
block
•Shorted coil
Electrode
Circuit Health
Electrode resistance baseline was
not taken after installation
Test condition was not selected
properly
Moisture in the sensor terminal
block
•Coated electrodes
Shorted electrodes

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