WIKA S-20 - Manual (Page 22)

22 WIKA operating instructions pressure transmitter, model S-20
14043170.02 07/2014 GB/D/F/E
GB
9. Faults
In the event of any faults, first check whether the pressure transmitter is mounted correctly, mechanically and electrically.
Faults Causes Measures
Plastic has faded UV radiation No measures required
Discolouration is harmless
No output signal Cable break Check the continuity, and if necessary
exchange the cable
No/wrong power supply Correct the power supply
No/wrong output signal Wiring error Rectify the wiring
Constant output signal upon change
in pressure
Mechanical overload caused by overpres-
sure
Replace instrument; if it fails repeatedly,
contact the manufacturer
Signal span too small/drops Mechanical overload caused by overpres-
sure
Replace instrument; if it fails repeatedly,
contact the manufacturer
Diaphragm damaged, e.g. due to impacts,
abrasive/aggressive medium; corrosion at
diaphragm or process connection; transmis-
sion medium missing
Replace instrument; if it fails repeatedly,
contact the manufacturer
Sealing/sealing face damaged/soiled,
sealing does not have a tight fit, threads
jammed
Clean the sealing/sealing face, replace sealing
if applicable
Signal span varies/inaccurate EMC interference sources in the environ-
ment; e.g. frequency converter
Shield instrument; cable shield;
Remove source of interference
Operating temperature too high/low Lower/increase the temperature
Instrument not grounded Ground the instrument
Strongly varying pressure of the process
medium
Damping; consulting by the manufacturer
Deviating zero point signal Operating temperature too high/low Lower/increase the temperature
Other mounting position Adjust the zero point
Overpressure limit exceeded Reduce the pressure
If complaint is unjustified, we will charge you the complaint processing fees.
9. Faults