Faults - WIKA S-20 Mode D'emploi

9. Faults

9. Faults
In the event of any faults, first check whether the pressure transmitter is mounted correctly, mechanically and electrically.
GB
Faults
Plastic has faded
No output signal
No/wrong output signal
Constant output signal upon change in
pressure
Signal span too small/drops
Signal span varies/inaccurate
Deviating zero point signal
If complaint is unjustified, we will charge you the complaint processing fees.
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Causes
UV radiation
Cable break
No/wrong power supply
Wiring error
Mechanical overload caused by overpres-
sure
Mechanical overload caused by overpres-
sure
Diaphragm damaged, e.g. due to impacts,
abrasive/aggressive medium; corrosion
at diaphragm or process connection;
transmission medium missing
Sealing/sealing face damaged/soiled,
sealing does not have a tight fit, threads
jammed
EMC interference sources in the
environment; e.g. frequency converter
Operating temperature too high/low
Instrument not grounded
Strongly varying pressure of the process
medium
Operating temperature too high/low
Other mounting position
Overpressure limit exceeded
WIKA operating instructions pressure transmitter, model S-20
Measures
No measures required
Discolouration is harmless
Check the continuity, and if necessary exchange
the cable
Correct the power supply
Rectify the wiring
Replace instrument; if it fails repeatedly, contact
the manufacturer
Replace instrument; if it fails repeatedly, contact
the manufacturer
Replace instrument; if it fails repeatedly, contact
the manufacturer
Clean the sealing/sealing face, replace sealing
if applicable
Shield instrument; cable shield;
Remove source of interference
Lower/increase the temperature
Ground the instrument
Damping; consulting by the manufacturer
Lower/increase the temperature
Adjust the zero point
Reduce the pressure