WIKA PGS23 - 7 Maintenance and Cleaning; Maintenance; Cleaning

Pressure gauges with inductive contact model 831, for hazardous areas20
14320154.01 06/2019 EN/DE
EN
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. For this
the instrument must be disconnected from the process to check with a pressure testing
device.
Testingoflledinstruments
For lled 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lling/rellingoftheinstrumentwith
loss of explosion protection
The lling/relling 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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Repair of the instruments may only be carried out by authorised bodies.
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If a return is needed, please follow the instructions given in chapter 8.2
“Return”.
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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Carry out the cleaning process as described below.
1. Before cleaning, correctly disconnect the instrument from the pressure supply, switch it
o 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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Do not use any aggressive cleaning agents.
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Do not use any hard or pointed objects for cleaning.
4. Wash or clean the dismounted instrument, in order to protect persons and the environ-
ment from exposure to residual media.
7. Maintenance and cleaning