Wika HP-2 Manual do Utilizador descarregar pdf (Página 19)

WIKA operating instructions pressure transmitter, model HP-2

11379180.03 09/2013 GB/D/F/E

10. Faults

In the event of any faults, rst 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 unjustied, 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”.

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Wika HP-2 Manual do Utilizador Página 19