WIKA AC-1 - Manual (Page 21)

21 WIKA operating instructions pressure transmitter model AC-1
14026285.01 11/2012 GB/D/F/E
GB
8. Faults
Faults Causes Measures
No output signal No/wrong power supply
Cable break
Correct the power supply
Check the continuity
Signal span too small Power supply too high/low
Mechanical overload caused by
overpressure
Correct the power supply
Replace instrument
Signal span drops Moisture has entered Fit the cable correctly
Signal span varies EMC interference sources in the
environment
Instrument not grounded
Strongly varying power supply
Strongly varying pressure of the
process medium
Shield instrument; cable shield; remove
source of interference
Ground the instrument
Stabilise the power supply
Damping, consulting by the manufacturer
If complaint is unjustified, the complaint processing fees will be charged.
CAUTION!
If faults cannot be eliminated by means of the measures listed above, shut down the
pressure transmitter immediately, and ensure that pressure and/or signal are no longer
present, and secure the instrument from being put back into operation inadvertently. In this
case, contact the manufacturer. If a return is needed, please follow the instructions given in
chapter 9.2 "Return".