Maintenance, Cleaning And Calibration - WIKA TR21 Mode D'emploi

11. Maintenance, cleaning and calibration

11. Maintenance, cleaning and calibration
For contact details see chapter 1 "General information" or the back page of
EN
the operating instructions.
11.1 Maintenance
The resistance thermometers described here require absolutely no maintenance and
contain no components which could be repaired or replaced.
In general, protection tubes are maintenance-free.
We recommend a visual check of the protection tube for leaks and damages at regular
intervals. Make sure that the seal is in perfect condition!
Repairs must only be carried out by the manufacturer.
11.2 Cleaning
CAUTION!
Physical injuries and damage to property and the environment
Improper cleaning may lead to physical injuries and damage to property and
the environment. Residual media in the dismounted instrument can result in a
risk to persons, the environment and equipment.
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▶ When cleaning from outside ("wash down"), observe the permissible temperature and
ingress protection.
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Prior to cleaning, properly disconnect the instrument.
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Use the required protective equipment (depending on the application; the thermometer
itself is basically not dangerous).
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Clean the instrument with a moist cloth.
This applies in particular to thermometers with a case made of plastic and cable
sensors with plastic-insulated connection lead, to ensure that any risk of electrostatic
charge is avoided.
Electrical connections must not come into contact with moisture!
CAUTION!
Damage to the instrument
Improper cleaning may lead to damage to the instrument!
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Wash or clean the dismounted instrument, in order to protect persons and the
environment from exposure to residual media.
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Carry out the cleaning process as described below.
Do not use any aggressive cleaning agents.
Do not use any pointed and hard objects for cleaning.
WIKA operating instructions model TR21