WIKA MH-4 Mode D'emploi page 13

6. Faults
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.
WIKA operating instructions pressure sensor, model MH-4
Causes
UV irradiation
Cable break
No/wrong power supply
Wiring error
Mechanical overload caused by
overpressure
Mechanical overload caused by
overpressure
Sealing/sealing face damaged or
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 fluctuating pressure of the
process medium
Operating temperature too high/low
Other mounting position
Overload safety exceeded
Measures
No measures required
Discolouration is harmless
Check the continuity, and if neces-
sary exchange the cable
Rectify the power supply
Rectify the wiring
Replace instrument; if it fails repea-
tedly, contact the manufacturer.
Replace instrument; if it fails repea-
tedly, 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
EN
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