WIKA R-1 - Manual (Page 22)

22 WIKA operating instructions pressure transmitter, model R-1
14026284.01 11/2012 GB/D/F/E
GB
8. Faults
Faults Causes Measures
Constant output signal upon
change in pressure
Mechanical overload caused by
overpressure
Wrong power supply or current pulse
Replace instrument; if it fails repeatedly,
contact the manufacturer
No/wrong output signal Wiring error Observe the pin assignment
No output signal No/wrong power supply or current
pulse
Cable break
Rectify the power supply
Check the continuity
Signal span too small Power supply too high/low
Mechanical overload caused by
overpressure
Rectify the power supply
Replace instrument; if it fails repeatedly,
contact the manufacturer
Signal span drops Moisture has entered
Diaphragm defective
Fit the cable correctly
Replace instrument; if it fails repeatedly,
contact the manufacturer
Signal span varies EMC interference sources in the
environment
Instrument not earthed
Strongly varying power supply
Strongly varying pressure of the
process medium
Shield instrument; cable shield; remove
source of interference
Earth the instrument
Stabilise the power supply
Damping, consulting by the manufacturer
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".