WIKA PSD-30 Mode D'emploi page 30

8. Faults
Problem
No output signal
No output signal
EN
No/wrong output signal
Constant output signal upon change
in pressure
Deviating zero point signal
Signal span too small
Signal span too small
Signal span drops
Signal span drops/too small
If complaint is unjustified, we will charge you the complaint processing fees.
CAUTION!
If deficiencies cannot be eliminated by means of the measures listed above, shut down the
instrument immediately, and ensure that pressure and/or signal are no longer present, and
secure the instrument from being put back into operation inadvertently. In this case, contact
the manufacturer. If a return is needed, follow the instructions given in chapter 9.2 "Return".
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Possible cause
Cable break
No/wrong power supply
Wiring error
Mechanical overload caused by over-
pressure
Overpressure limit exceeded
Mechanical overload caused by over-
pressure
Power supply too high/low
Humidity has entered
Diaphragm damaged, e.g. due to
impacts, abrasive/aggressive medium;
corrosion at diaphragm/process
connection
WIKA operating instructions pressure switch, model PSD-3x
Measure
Check the continuity
Rectify the power supply
Observe the pin assignment
Replace instrument; if it fails repeatedly,
contact the manufacturer
Observe the permissible overpressure limit
Replace instrument; if it fails repeatedly,
contact the manufacturer
Rectify the power supply
Assemble the cable correctly
Contact manufacturer and replace
instrument