Maintenance And Cleaning; Maintenance; Cleaning - WIKA 831 Manual De Instrucciones

7. Maintenance and cleaning

7. Maintenance and cleaning

7.1 Maintenance

The instruments are maintenance-free.
The indicator and switching function should be checked once or twice every year. The test
can be carried out separately from the process with a pressure testing device.
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Testing of filled instruments
For filled instruments, the level must be checked once or twice every year.
The liquid level must not drop below 75 % of the instrument diameter.
WARNING!
Danger to life due to impermissible filling/refilling of the instrument with
loss of explosion protection
The filling/refilling of instruments by non-authorised personnel leads to a loss of
the explosion protection and can lead to damage to the instrument.
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Repairs must only be carried out by the manufacturer.

7.2 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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1. Before cleaning, correctly disconnect the instrument from the pressure supply, switch it
off and disconnect it from the mains.
2. Use the requisite protective equipment.
3. Clean the instrument with a moist cloth.
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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4. Wash or clean the dismounted instrument, in order to protect persons and the environ-
ment from exposure to residual media.
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Repair of the instruments may only be carried out by authorised bodies.
If a return is needed, please follow the instructions given in chapter 8.2
"Return".
Carry out the cleaning process as described below.
Do not use any aggressive cleaning agents.
Do not use any hard or pointed objects for cleaning.
Pressure gauges with inductive contact model 831, for hazardous areas