WIKA WU-26 - Manual (Page 19)

19 WIKA Operating instructions/Betriebsanleitung/Mode d'emploi/Instrucciones de servicio, WU-2X
11553678.02 GB/D/F/E 10/2012
Failure Possible cause Procedure
Output signal unchanged after change in
pressure
Mechanical overload through overpressure
Wrong supply voltage or current spike
Replace instrument; if failure reoccurs, consult
the manufacturer *)
Replace instrument
No output signal No/incorrect voltage supply or current spike
Cable break
Adjust the voltage supply to correspond with
the Operating Instructions *)
Check connections and cable
No/False output signal Incorrectly wired (e.g. Connected as 2-wire
instead of 3-wire system)
Follow pin assignment (see Instrument Label /
Operating Instructions)
Abnormal output signal or abnormal zero point
signal
Zero point set wrongly Adjust zero point correctly (see chapter 8); a
sufficiently accurate current/volt meter should
be used
Abnormal zero point signal Medium or ambient temperature too high/
too low
Diaphragm is damaged, e.g. through impact,
abrasive/agressive media; corrosion of
diaphragm/pressure connector.
Control the internal temperature of the instru-
ment within the permissible range; observe the
allowable temperature error (see Operating
Instructions)
Replace instrument
Signal span dropping off/too small Diaphragm is damaged, e.g. through impact,
abrasive/agressive media; corrosion of
diaphragm/pressure connector
Contact the manufacturer and replace the
instrument
Signal span too small Power supply too high/too low
Mechanical overload through overpressure
Correct the power supply in line with the
Operating Instructions
Re-calibrate the instrument *)
*) Make sure that after the setting the unit is working properly. In case the error continues to exist send in the instrument for reparation (or replace
the unit).
In case of unjustified reclamation we charge the reclamation handling expenses.
10. Trouble shooting GB