Maintenance And Cleaning; Maintenance - WIKA PGT23.100 Mode D'emploi

6. Faults / 7. Maintenance and cleaning
Faults
No output signal.
EN
Constant output
signal upon change in
pressure.
Too high, constant
output signal upon
change in pressure.
Signal span too small.
Zero point signal too low
or too high.
For the exchange of the instrument chapters 8 "Dismounting, return and disposal" and 5
"Commissioning, operation" must be observed.

7. Maintenance and cleaning

7.1 Maintenance

The instruments are maintenance-free.
The indicator and switching function should be checked once or twice every year. The test
can be carried out separately from the process with a pressure testing device.
Testing of filled instruments
For filled instruments, the level must be checked once or twice every year.
The liquid level must not drop below 75 % of the instrument diameter.
22
Causes
Insufficient supply voltage or cable
break.
Wrong pin assignment.
Defective transmitter electronics
due to overvoltage.
Pressure port blocked at process
connection.
Supply voltage connected the
wrong way. (I = ca. 4.5 mA).
Defective transmitter electronics
Bridge on terminals 5 and 6 not
removed (I = approx. 9.5 mA).
Defective transmitter electronics
due to overvoltage.
Insufficient supply voltage.
Load too high.
Zero point maladjusted.
Zero point maladjusted.
Pressure gauges with output signal, optionally for hazardous areas
Measures
Check voltage supply and cables.
Check pin assignment.
Replace instrument.
Clean pressure port at process
connection
Check pin assignment.
Replace instrument.
Remove the terminal bridge.
See chapter 5.3. "Zero point
setting".
Replace instrument.
Check voltage supply and cables.
Maintain permissible load.
See chapter 5.3. "Zero point
setting".
See chapter 5.3. "Zero point
setting".