Omega PX2088 User Manual page 42

TABLE 5-2. (continued).Analog Transmitter Troubleshooting and Corrective Actions.
Symptom Potential Source
Erratic Output Impulse Piping
Loop Wiring
Output Electronics
Other Components
Low Output or Impulse Piping
No Output
Loop Wiring
Output Electronics
Other Components
Corrective Action
• Check for leaks or blockage in the impulse line.
• Check to ensure that the blocking valve is fully open.
• Check for trapped gas in a liquid line, or trapped liquid in
a gas line.
• Check to ensure that the density of the fluid in the
impulse line is unchanged.
• Check for sediment in the transmitter process
connection. If you find sediment, flush the process
connection clean with water or an appropriate solvent.
• Check for frozen process fluid in the process connector.
• Check for trapped gas in a liquid line, or trapped liquid in
a gas line.
• Check for adequate voltage to the transmitter.
• Check for intermittent shorts, open circuits, and multiple
grounds.
• Replace the output board and recalibrate the transmitter.
• Replace the transmitter.
• Check for leaks or blockage in the impulse line.
• Check to ensure that the blocking valve is fully open.
• Check for trapped gas in a liquid line, or trapped liquid in
a gas line.
• Check to ensure that the density of the fluid in the
impulse line is unchanged.
• Check for sediment in the transmitter process
connection. If you find sediment, flush the process
connection clean with water or an appropriate solvent.
Do not attempt to scrape sediment free; doing so
could puncture the thin isolating diaphragm and destroy
the transmitter.
• Check for frozen process fluid in the process connector.
• Check for adequate voltage to the transmitter.
• Check the current rating of the power supply against the
total current being drawn by all transmitters being
powered.
• Check for intermittent shorts, open circuits, and multiple
grounds.
• Check for proper polarity at the signal terminals.
• Check the loop impedance.
• Replace the output board and recalibrate the transmitter.
• Replace the transmitter.
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