WIKA MH-4-CAN Manual De Instrucciones página 10

5. Faults
Faults
Plastic has faded
EN
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
10
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
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
Overpressure limit exceeded
WIKA operating instructions pressure sensor, model MH-4-CAN
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
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