WIKA MH-4 Manual De Instrucciones página 9

5. Faults
5. Faults
CAUTION!
Physical injuries and damage to property and the environment
If faults cannot be eliminated by means of the listed measures, the pressure sensor must be taken out
of operation immediately.
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Ensure that pressure or signal is no longer present and protect against accidental commissioning.
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Contact the manufacturer.
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If a return is needed, please follow the instructions given in chapter 7.2 "Return".
For contact details, see chapter 1 "General information" or the back page of the operating instructions.
In the event of any faults, first check whether the pressure sensor is mounted correctly, mechanically and electrically.
Faults
Plastic has faded
No output signal
No/wrong output signal
Constant output signal upon
change in pressure
Signal span too small/drops
WIKA operating instructions pressure sensor, model MH-4
Causes
UV irradiation
Cable break
No/wrong auxiliary power
Wiring error
Mechanical overload caused by overpressure
Mechanical overload caused by overpressure
Seal/sealing face damaged or soiled, seal
does not have a tight fit, threads jammed
Measures
No measures required
Discolouration is harmless
Check the continuity, and if necessary
exchange the cable
Correct the auxiliary power
Rectify the wiring
Replace instrument; if it fails repeatedly,
contact the manufacturer.
Replace instrument; if it fails repeatedly,
contact the manufacturer.
Clean the seal/sealing face, replace seal if
applicable
EN
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