WIKA HP-2 - Manual (Page 19)

19 WIKA operating instructions pressure transmitter, model HP-2
11379180.03 09/2013 GB/D/F/E
GB
10. Faults
10. Faults
In the event of any faults, first check whether the pressure transmitter is mounted
correctly, mechanically and electrically.
Faults Causes Measures
No output signal Cable break Replace connecting cable
No/wrong power supply Correct the power supply
No/wrong output signal Wiring error Rectify the wiring in accordance
with the connection diagram
Constant output signal upon
change in pressure
Wrong power supply Replace instrument
Deviating output signal Zero point change through
dynamic pressure
Re-adjust zero point
Signal span too high Pressure spikes, cavitations Use instrument with cavitation and
pressure-spike protection
Signal span too small Wrong power supply Rectify the power supply
Signal span varies EMC interference sources in the
environment
Shield the instrument and cables,
remove source of interference
Instrument not grounded Ground the instrument
Strongly varying pressure of the
medium
Damping (consulting by the
manufacturer)
Leakage at the process connection Hairline crack in the pressure port Consult with manufacturer, if
required, replace instrument.
If complaint is unjustified, the handling costs 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
11.2 “Return”.