Wika PSA-31 Manual do Utilizador descarregar pdf (Página 29)

29WIKA operating instructions pressure switch model PSA-31

14018458.01 11/2011 GB/D/F/E

8. Faults

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

electrically.

Error display

Via the instrument's display internal errors are output.

The following table shows the error codes and their meaning.

8. Faults

Problem Possible cause Measure

No output signal Cable break Check the continuity

No output signal No/wrong power supply Rectify the power supply

No/wrong output signal Wiring error Observe the pin assignment

Constant output signal upon change in

pressure

Mechanical overload caused by overpressure Replace instrument; if it fails repeatedly, contact

the manufacturer

Deviating zero point signal Overpressure limit exceeded Observe the permissible overpressure limit

Signal span too small Mechanical overload caused by overpressure Replace instrument; if it fails repeatedly, contact

the manufacturer

Signal span too small Power supply too high/low Rectify the power supply

Signal span drops Humidity has entered Assemble the cable correctly

Signal span drops/too small Diaphragm damaged, e.g. due to impacts,

abrasive/aggressive medium; corrosion at

diaphragm/process connection

Contact manufacturer and replace instrument

If complaint is unjustied, we will charge you the complaint processing fees.

Error Description

ATT1 On changing the switch point, the system automatically reduces the reset point.

ATT2 Zero-point adjustment error, current pressure is outside the limits

ATT3 Password entered for menu access is incorrect

ERR Internal error

OL Overpressure, measuring range exceeded > approx. 5% (display blinks)

UL Underpressure, below measuring range < approx. 5 % (display blinks)

Acknowledgement of an error display by pressing the "Enter" key.

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Wika PSA-31 Manual do Utilizador Página 29