Faults - WIKA TR serie Betriebsanleitung

7. Faults

7. Faults
CAUTION!
Physical injuries and damage to property and the environment
If faults cannot be eliminated by means of the listed measures, the instrument
must be taken out of operation immediately.
▶
Ensure that there is no longer any signal present and protect against being
put into operation accidentally.
▶
Contact the manufacturer.
▶
If a return is needed, please follow the instructions given in chapter 9.2
"Return".
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.
▶ Wear the required protective equipment (depending on the application; the
thermometer itself is basically not dangerous).
For contact details, please see chapter 1 "General information" or the back
page of the operating instructions.
Faults
No signal/cable break
Erroneous measured
values
Erroneous measured
values (too low)
Erroneous measured
values and response
times too long
WIKA operating instructions, models TRxx and TCxx
Causes
Mechanical load too high or
overtemperature
Sensor drift caused by
overtemperature
Sensor drift caused by chemical
attack
Entry of moisture into cable or
measuring insert
Wrong mounting geometry, for
example mounting depth too
deep or heat dissipation too high
Deposits on the sensor or
thermowell
Measures
Replace probe or measuring insert
with one of a suitable design
Replace probe or measuring insert
with one of a suitable design
Use a suitable thermowell.
Replace probe or measuring insert
with one of a suitable design
The temperature-sensitive
area of the sensor must be
inside the medium, and surface
measurements must be ungrounded
Remove deposits
EN
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