Dismounting, Return And Disposal - WIKA S-11 Mode D'emploi

9. Faults / 10. Dismounting, return and disposal
Fault
Signal span too small/drops
EN
Signal span varies/inaccurate
Deviating zero point signal
CAUTION!
If faults cannot be eliminated by means of the measures listed above, the pressure transmitter must be
shut down immediately, and it must be ensured that signal is no longer present, and it must be prevented
from being inadvertently put back into service. In this case, contact the manufacturer. If a return is
needed, follow the instructions given in chapter 10.2 "Return".

10. Dismounting, return and disposal

WARNING!
Residual media in the dismounted pressure transmitter can result in a risk to persons, the environment
and equipment.
Take sufficient precautionary measures.
22
Possible cause
Mechanical overload caused by overpressure
Diaphragm damage
Sealing/sealing face damaged/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 earthed
Strongly varying pressure of the process medium
Operating temperature too high/low
Other mounting position
Overpressure limit exceeded
WIKA operating instructions pressure transmitter, model S-11
Measure
Replace instrument
Replace instrument
Clean the sealing/sealing face,
replace sealing
Shield instrument; shield cable;
remove source of interference
Observe the permissible temperatures
Earth the instrument
Damping; consulting by the manufac-
turer
Observe the permissible temperatures
Adjust the zero point
Replace instrument