Maintenance; Faults - WIKA TC59-R Betriebsanleitung

7. Maintenance / 8. Faults

7. Maintenance

These thermocouples are maintenance-free.
Repairs must only be carried out by the manufacturer.
EN

8. Faults

Faults
No signal/line breakage
Erroneous
measured values (of
thermocouples)
Signal interference
CAUTION!
If faults cannot be eliminated by means of the measures listed above, shut down the
instrument 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 see chapter 9.2 "Return".
18
Causes
Mechanical load too high or
overtemperature
Parasitic voltages (thermal
voltages, galvanic voltage) or
incorrect thermocouple cable type
Stray currents caused by electric
fields or earth loops
Earth circuits
WIKA operating instructions model TC59-R (REFRACTO-PAD
Measures
Replace probe or measuring insert
with a suitable design
Use the correct thermocouple
cable type
Use of shielded connecting cables,
increase in the distance to motors
and power lines
Elimination of potentials, use of
galvanically isolated transmitter
supply isolators or transmitters
)
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