WIKA MH-4 Manual De Instrucciones página 10

5. Faults / 6. Maintenance
Faults
No/wrong output signal
EN
Constant output signal upon
change in pressure
Signal span too small/drops
Signal span varies/inaccurate
Deviating zero point signal
6. Maintenance
6.1 Maintenance
This pressure sensor is maintenance-free.
Repairs must only be carried out by the manufacturer.
6.2 Cleaning
Only use commercially available and solvent-free cleaning agents.
10
Causes
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
Rectify the wiring
Replace instrument; if it fails repeatedly, contact
the manufacturer.
Replace instrument; if it fails repeatedly, 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
WIKA operating instructions pressure sensor, model MH-4