Faults - WIKA TC84 Mode D'emploi

6. Faults

6. Faults
Personnel: Skilled electrical personnel
Protective equipment: Safety clothing, helmet, harness, gas detector etc.
EN
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.
▶
▶
▶
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 contact details see chapter 1 "General information" or the back page of
the operating instructions.
Faults
No signal/cable break
Erroneous measured
values and response
times too long
Erroneous
measured values (of
thermocouples)
14
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 8.2
"Return".
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).
Causes
Mechanical load too high or
damage
Wrong mounting geometry, for
example mounting depth too
deep or heat dissipation too high
Deposits on the sensor or
protection tube
Parasitic voltages (thermal
voltages, galvanic voltage) or
wrong compensating cable
Measures
Replace the thermometer
The temperature-sensitive area
of the sensor must be within the
medium
Remove deposits
Use suitable compensating cable
WIKA operating instructions model TC84