Approaching The Pressure Value - WIKA CPB 3000 Betriebsanleitung

Pressure Balance
CPB 3000
. Weight pieces with bell

3.2.2 Approaching the pressure value

We recommend unscrewing the spindle pump completely when you start to record measurement
values, (turning anticlockwise) to allow enough volume for measurements. The shut-off valve for
the test connection (2) must be closed and the shut-off valve on the reservoir (3) must be opened
during this process.
After this close the shut-off valve on the reservoir (3) and open the shut-off valve for the test
connection (2).
To increase the test pressure turn the star handle (1) clockwise.
If, after the spindle has been fully wound in in a clockwise direction, there is no
increase in pressure, then the connected test volume is not yet filled enough and new
pressure medium must be drawn from the reservoir into the test specimen. For this
purpose, proceed as follows:
1) Close the shut-off valve for test connection (2) by turning it clockwise.
2) Open the shut-off valve on the reservoir (3).
3) Turn the star handle (1) anticlockwise until fully out/open.
Pressure medium is drawn from the reservoir into the cylinder of the pump.
4) Close the shut-off valve on the reservoir (3).
5) Open the shut-off valve for test connection (2) by turning it counterclockwise
(less than one complete turn is sufficient).
6) Turn the star handle (1) clockwise until the test specimen and/or the reference indicates a
pressure of appro. 10 to 50 bar (depending on the measuring range).
WIKA Operating Instructions Pressure Balance Version 1.1
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Weight
pieces
Bell (No. 1)
Plate (No. 2)
Piston/cylinder
system
Marking line for
float position
Weight pieces with plate
GB
..
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