Wika T24 Manual do Utilizador descarregar pdf (Página 29)

WIKA operating instructions temperature transmitter, model T24 29

2370242.09 08/2013 GB/D

CAUTION!

If faults cannot be eliminated by means of the measures

listed above, the instrument must be shut down immedi-

ately, and it must be ensured that pressure and/or signal

are no longer present, and it must be prevented from

being inadvertently put back into service.

In this case, contact the manufacturer.

If a return is needed, please follow the instructions given

in chapter 12.1 “Returns” and enclose a short description

of the problem, details of ambient conditions as well as

period of operation before the problem occurred with the

temperature transmitter.

12. Faults

Parasitic ground-loop

Capacitive or

inductive coupling

over the sensor

Check process adap-

tion, output adaption

(WIKA_TT software)

4 mA < l < 20 mA

but wrong values

Current value I is okay at

low values, but too high at

higher temperatures

Current value I is unstable,

changes within milliseconds

Load too high for the supply voltage

Electromagnetic

interference

Wrong transmitter

conguration

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Wika T24 Manual do Utilizador Página 29