23
WIKA operating instruction, model CPP120-X
EN
08/2020 EN/DE
6. Commissioning, operation
Use the system pressure gauge as an indication to see when the required
pressure is reached.
6.5.2 Decreasing pressure
1. Open the outlet valve
4
carefully by turning anti-clockwise.
2. As you slowly reach the desired calibration pressure begin to close the outlet valve
4
by turning clockwise.
⇒
Close outlet valve
4
and use the volume adjuster
5
to obtain desired pressure
point required.
6.6 Cleaning gauges
This cleaning/degreasing process is only suitable for use with pressure gauges with
either phosphor bronze, beryllium copper, monel or stainless steel bourdon tubes in the
form of a “C”.
It is not advisable to degrease pressure gauges with steel bourdon tubes since a very
small amount of corrosion on the bore of a bourdon tube can cause inaccuracies of
reading and early failure of the tube.
Wear safety goggles!
Protect eyes from flying particles and liquid splashes.
This method of cleaning is not suitable for use with pressure gauges which are fitted with
coiled bourdon tubes, nor any measuring instruments which are to be used on oxygen, as
functioning without oil is not assured. In this case please contact DH-Budenberg/WIKA.
Equipment
This consists of a syringe and a special needle with the point bent through 90°.
