WIKA TR31-3 Mode D'emploi page 24

9. Faults
WARNING!
Physical injuries and damage to property and the
environment caused by hazardous media
EN
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 contact details see chapter 1 "General information" or the
back page of the operating instructions.
Faults
No signal/line break
Erroneous measured
values
Erroneous measured
values (too low)
Erroneous measured
values and response
times too long
24
For these media, in addition to all standard regulations,
the appropriate existing codes or regulations must also be
followed.
Causes
Mechanical load too high
or overtemperature
Sensor drift caused by
overtemperature
Sensor drift caused by
chemical attack
Entry of moisture into
cable
Wrong mounting
geometry, for example
mounting depth too deep
or heat dissipation too
high
Deposits on the
thermowell
WIKA operating instructions models TR31-3, TR31-K
Measures
Replace the sensor with a
suitable version
Replace the sensor with a
suitable version
Analyse the medium
Use the appropriate IP
protection
The temperature-sensitive
area of the sensor must
be inside the medium, and
surfaces measurements
must be ungrounded
Remove deposits