EN
WIKA operating instructions models TR31-3, TR31-K
14096788.08 02/2022 EN/DE/FR/ES
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9. Faults / 10. Maintenance and cleaning
Faults
Causes
Measures
Display of measured
value jumps
Cable break in
connecting cable or
loose contact caused by
mechanical overload
Replace the sensor or use
thicker conductor cross-
section
Corrosion
Composition of the
medium not as expected
or modified
Analyse the medium
Signal interference
Stray currents caused
by electric fields or earth
loops
Use of screened
connecting cables,
increase in the distance to
motors and power lines
Earth loops
Elimination of potentials,
use of galvanically isolated
transmitter supply isolators
or transmitters
10. Maintenance and cleaning
For contact details see chapter 1 “General information” or the
back page of the operating instructions.
10.1 Maintenance
The resistance thermometers described here require absolutely no
maintenance and contain no components which could be repaired or
replaced.