Table 5-4: Unexpected Process Variable (PV) Readings (continued)
Symptom Corrective action
Low PV Reading or No
PV Reading
Feature board electronics
• Check the sensor limits to ensure calibration adjustments are within
the sensor range and that calibration is correct for the pressure being
applied.
• Confirm the electronics housing is properly sealed against moisture.
• If the feature board electronics are still not functioning properly,
substitute new feature board electronics.
Flow configuration (fully compensated mass and energy flow feature
board only)
• Verify flow configuration is correct for current application.
Process temperature RTD input
• Verify all wire terminations
• Verify sensor is a Pt 100 RTD
• Replace Pt 100 sensor
Sensor module
• The sensor module is not field repairable and must be replaced if
found to be defective. Check for obvious defects, such as a punctured
isolating diaphragm or fill fluid loss, and contact your nearest
Emerson Service Center.
Sluggish Output
Response/Drift
Primary element
• Check for restrictions at the primary element.
Impulse piping
• Check for leaks or blockage.
• Ensure blocking valves are fully open.
• Check for sediment in the transmitter process flange.
• Check for entrapped gas in liquid lines and for liquid in gas lines.
• Ensure the density of fluid in impulse lines is unchanged.
• Make sure process fluid has not frozen within the process flange.
Feature board electronics
• Confirm damping is correctly set.
• Confirm the electronics housing is properly sealed against moisture.
Sensor module
• The sensor module is not field repairable and must be replaced if
found to be defective. Check for obvious defects, such as a punctured
isolating diaphragm or fill fluid loss, and contact your nearest
Emerson Process Management Service Center.
• Confirm the electronics housing is properly sealed against moisture.
The following performance limitations may inhibit efficient or safe operation. Critical
applications should have appropriate diagnostic and backup systems in place. Pressure
Troubleshooting Reference Manual
October 2018 00809-0100-4803
140 Rosemount 3051S Multivariable Transmitter
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