Possible Cause - WIKA F-20 Betriebsanleitung

9. Trouble shooting
Do not insert any pointed or hard objects into the pressure port for cleaning to prevent damage to the diaphragm of the
pressure connection.
Please verify in advance if pressure is being applied (valves/ ball valve etc. open) and if the right voltage supply and the
right type of wiring (2-wire/ 3-wire) has been chosen?
Fault
No output signal
No/False output signal
Output signal unchanged
after change in pressure
Abnormal output signal
Signal span dropping off/
too small
Signal span erratic
Abnormal zero point signal
Zero point signal unstable/
too low/high
In case of unjustified reclamation we charge the reclamation handling expenses.
*) 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).
If the problem persists, contact our sales department.
WIKA operating instructions pressure transmitters, models F-20, F-21

Possible cause

No/incorrect voltage supply or current spike
Cable break
Incorrectly wired (e.g. Connected as 2-wire instead of
3-wire system)
Mechanical overload through overpressure
Wrong supply voltage or current spike
Span incorrectly adjusted
Diaphragm is damaged, e.g. through impact, abrasive/
agressive media; corrosion of diaphragm/pressure
connector; transmission fluid missing.
Seal/Sealing face damaged/contaminated, seal mounted
incorrectly, threads crossed
Moisture present (e.g. at the cable tail)
Power supply too high/too low
Mechanical overload through overpressure
Electromagnetic interference source in the vicinity, e.g.
inverter drive
Diaphragm is damaged, e.g. through impact, abrasive/
agressive media; corrosion of diaphragm/pressure
connector.
Moisture present (e.g. at the cable tail)
Procedure
Adjust the voltage supply to correspond
with the Operating Instructions
Check connections and cable
Follow pin assignment (see Instrument
Label / Operating Instructions)
Replace instrument; if failure reoccurs,
consult the manufacturer
*)
Replace instrument
Use appropriate reference
Contact the manufacturer and replace the
instrument
Clean the seal/sealing face, possibly
replace the seal.
Install the cable correctly
Correct the power supply in line with the
Operating Instructions
Re-calibrate the instrument *)
Shield the device; shield the cables;
remove the interference source.
Replace instrument
Install the cable correctly
EN
*)
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