WIKA S-11 - Manual (Page 23)

23 WIKA operating instructions pressure transmitter, model S-11
GB
14043046.01 06/2012 GB/D/F/E
Fault Possible cause Measure
No output signal Cable break
No/wrong power supply
Check the through drilling
Correct the power supply
No/wrong output signal Wiring error Rectify the wiring
Constant output signal upon
change in pressure
Mechanical overload caused by overpressure Replace instrument
Signal span too small/drops Mechanical overload caused by overpressure
Diaphragm damage
Sealing/sealing face damaged/soiled, sealing
does not have a tight fit, threads jammed
Replace instrument
Replace instrument
Clean the sealing/sealing face,
replace sealing
Signal span varies/inaccurate EMC interference sources in the environment
(e.g. frequency converter)
Operating temperature too high/low
Instrument not earthed
Strongly varying pressure of the process
medium
Shield instrument; shield cable;
remove source of interference
Observe the permissible tempera-
tures
Earth the instrument
Damping; consulting by the manu-
facturer
Deviating zero point signal Operating temperature too high/low
Other mounting position
Overpressure limit exceeded
Observe the permissible tempera-
tures
Adjust the zero point
Replace instrument
9. Faults
In the event of any faults, first check whether the pressure transmitter is mounted correctly, mechanically
and electrically.
9. Faults