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6. Faults / 7. Maintenance and cleaning
Faults
No signal/line breakage
Erroneous measured
values (of thermocouples)
Signal interference
7. Maintenance and cleaning
For contact details, please see chapter 1 "General information" or the back
page of the operating instructions.
7.1 Maintenance
These thermocouples are maintenance-free.
Repairs must only be carried out by the manufacturer.
7.2 Cleaning
CAUTION!
Physical injuries and damage to property and the environment
Residual media can result in a risk to persons, the environment and
equipment.
▶
Use the requisite protective equipment.
▶
Carry out the cleaning process in accordance with the manufacturer's
instructions
WIKA operating instructions model TC59-E (eTEFRACTO-PAD)
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 ground loops
Ground loops
Measures
Replace probe or measuring
insert with a suitable design
Use the correct thermocouple
cable type
Use of shielded connection
cables, increase in the
distance to motors and power
lines
Elimination of potentials,
use of galvanically isolated
repeater power supplies or
transmitters
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