Faults - WIKA TR21-A Manual De Instrucciones

10. Faults

10. Faults
CAUTION!
Physical injuries and damage to property and the environment
EN
If faults cannot be eliminated by means of the listed measures, the instrument
must be taken out of operation immediately.
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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.
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For contact details see chapter 1 „General information" or the back page of
the operating instructions.
In the case of critical installations, we recommend calculating the harmonic frequency
of the protection tube according to Dittrich/Klotter. This engineering service is offered by
WIKA.
Faults
No signal/cable break
Erroneous measured
values
Erroneous measured
values (too low)
20
Ensure that pressure or signal is no longer present and protect against
accidental commissioning.
Contact the manufacturer.
If a return is needed, please follow the instructions given in chapter 12.2
"Return".
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
Measures
Replace the sensor with a suitable
version
Replace the sensor with a suitable
version
Analyse the medium
Use the appropriate IP protection
WIKA operating instructions model TR21