WIKA R-1 Mode D'emploi page 22

8. Faults
Faults
Constant output signal upon
change in pressure
EN
No/wrong output signal
No output signal
Signal span too small
Signal span drops
Signal span varies
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".
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Causes
Mechanical overload caused by
overpressure
Wrong power supply or current pulse
Wiring error
No/wrong power supply or current
pulse
Cable break
Power supply too high/low
Mechanical overload caused by
overpressure
Moisture has entered
Diaphragm defective
EMC interference sources in the
environment
Instrument not earthed
Strongly varying power supply
Strongly varying pressure of the
process medium
WIKA operating instructions pressure transmitter, model R-1
Measures
Replace instrument; if it fails repeatedly,
contact the manufacturer
Observe the pin assignment
Rectify the power supply
Check the continuity
Rectify the power supply
Replace instrument; if it fails repeatedly,
contact the manufacturer
Fit the cable correctly
Replace instrument; if it fails repeatedly,
contact the manufacturer
Shield instrument; cable shield; remove
source of interference
Earth the instrument
Stabilise the power supply
Damping, consulting by the manufacturer