WIKA NS160 Betriebsanleitung Seite 14

6. Commissioning, operation / 7. Maintenance and cleaning
Level check
For filled instruments, the level must be checked on a regular basis.
The liquid level must not drop below 75 % of the instrument diameter.
6.2 Commissioning
During the commissioning process pressure surges must be avoided at all costs. Open the
shut-off valves slowly.
EN
7. Maintenance and cleaning
7.1 Maintenance
The instruments are maintenance-free. The indicator 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.
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.
▶
If the instrument is exposed to intensive UV radiation, the colouring of the dial
printing may change. This has no effect on the function of the instrument.
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.
▶
1. Before cleaning, correctly disconnect the instrument from the pressure
2. Use the requisite protective equipment.
3. Clean the instrument with a moist cloth.
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Repair of the instruments may only be carried out by authorised bodies.
Carry out the cleaning process as described below.
supply.
WIKA operating instructions pressure gauge, model 4 per ATEX