Possible Cause - WIKA E-10 Betriebsanleitung

8. Trouble shooting
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.
Failure
No output signal
No/False output signal
Output signal unchanged after change
in pressure
Output signal unchanged after change
in pressure
Signal span dropping off/too small
Signal span too small
Signal span dropping off
Signal span erratic
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).
WIKA Operating instructions, E-10, E-11

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 overpres-
sure
Wrong supply voltage or current spike
Diaphragm is damaged, e.g. through
impact, abrasive/agressive media; corro-
sion of diaphragm/pressure connector;
transmission fluid missing.
Power supply too high/too low
Mechanical overload through overpres-
sure
Moisture present (e.g. at the cable tail)
Electromagnetic interference source in
the vicinity, e.g. inverter drive
Instrument not grounded
Strongly fluctuating power supply
Strongly fluctuating pressure of the
process medium
Procedure
Correct the power supply in line 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
Contact the manufacturer and replace
the instrument
Correct the power supply in line with the
Operating Instructions
Replace instrument
Install the cable correctly
Shield the device; shield the cables;
remove the interference source.
Ground the instrument
Stabilise power supply; fit a suppressor
Damping; consulting by the manufac-
turer
EN
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