Maintenance And Cleaning - WIKA MH-3 Betriebsanleitung

6. Faults/7. Maintenance and cleaning
Faults
Signal span too small/drops Mechanical overload caused
EN
Signal span varies/inaccu-
rate
Deviating zero point signal
If complaint is unjustified, we will charge you the complaint processing fees.

7. Maintenance and cleaning

7.1 Maintenance
This pressure sensor is maintenance-free.
Repairs must only be carried out by the manufacturer.
Regular inspection of the sealing by the operator is necessary.
12
Causes
by overpressure
Diaphragm damaged, e.g. due
to impacts, abrasive/aggres-
sive medium; corrosion at
diaphragm or process connec-
tion; transmission medium
missing
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
Overpressure limit exceeded
WIKA operating instructions, OEM pressure sensor, model MH-3
Measures
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 tempera-
ture
Ground the instrument
Dampening; consulting by the
manufacturer
Lower/increase the tempera-
ture
Adjust the zero point
Reduce the pressure