Wika S-11 Manual do Utilizador descarregar pdf (Página 23)

23WIKA operating instructions pressure transmitter, model S-11

14043046.01 06/2012 GB/D/F/E

Fault Possible cause Measure

No output signal Cable break

No/wrong power supply

Check the through drilling

Correct the power supply

No/wrong output signal Wiring error Rectify the wiring

Constant output signal upon

change in pressure

Mechanical overload caused by overpressure Replace instrument

Signal span too small/drops Mechanical overload caused by overpressure

Diaphragm damage

Sealing/sealing face damaged/soiled, sealing

does not have a tight t, threads jammed

Replace instrument

Clean the sealing/sealing face,

replace sealing

Signal span varies/inaccurate EMC interference sources in the environment

(e.g. frequency converter)

Operating temperature too high/low

Instrument not earthed

Strongly varying pressure of the process

medium

Shield instrument; shield cable;

remove source of interference

Observe the permissible tempera-

tures

Earth the instrument

Damping; consulting by the manu-

facturer

Deviating zero point signal Operating temperature too high/low

Other mounting position

Overpressure limit exceeded

Observe the permissible tempera-

tures

Adjust the zero point

Replace instrument

9. Faults

In the event of any faults, rst check whether the pressure transmitter is mounted correctly, mechanically

and electrically.

9. Faults

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Wika S-11 Manual do Utilizador Página 23