EN
14096788.08 02/2022 EN/DE/FR/ES
24
WIKA operating instructions models TR31-3, TR31-K
9. Faults
WARNING!
Physical injuries and damage to property and the
environment caused by hazardous media
Upon contact with hazardous media (e.g. oxygen, acetylene,
flammable or toxic substances), harmful media (e.g. corrosive,
toxic, carcinogenic, radioactive), and also with refrigeration
plants and compressors, there is a danger of physical injuries
and damage to property and the environment.
Should a failure occur, aggressive media with extremely high
temperature and under high pressure or vacuum may be
present at the instrument.
▶
For these media, in addition to all standard regulations,
the appropriate existing codes or regulations must also be
followed.
For contact details see chapter 1 “General information” or the
back page of the operating instructions.
Faults
Causes
Measures
No signal/line break
Mechanical load too high
or overtemperature
Replace the sensor with a
suitable version
Erroneous measured
values
Sensor drift caused by
overtemperature
Replace the sensor with a
suitable version
Sensor drift caused by
chemical attack
Analyse the medium
Erroneous measured
values (too low)
Entry of moisture into
cable
Use the appropriate IP
protection
Erroneous measured
values and response
times too long
Wrong mounting
geometry, for example
mounting depth too deep
or heat dissipation too
high
The temperature-sensitive
area of the sensor must
be inside the medium, and
surfaces measurements
must be ungrounded
Deposits on the
thermowell
Remove deposits