Connecting The Test Specimen; Venting The System - WIKA CPB 3000 Betriebsanleitung

Pressure Balance
CPB 3000

3.1.4 Connecting the test specimen

Before connecting the piston/cylinder system, the system should be vented. For this, oil is pumped
into the system by opening the right pressure connection by carefully turning the star handle in a
clockwise direction. It should be turned until oil appears at the O-ring seals of the open pressure
connection and no more air bubbles are escaping. The shut-off valve on the reservoir must be
closed. The shut-off valve of the test specimen connection must be opened and the piston/cylinder
system must be mounted into the piston/cylinder system connection.
Place the device to be checked in the quick connector with the knurled nut. It can be freely
positioned. Hand-tightening will suffice for safe sealing.
To calibrate instruments with back pressure entry there is an a
accessories section 8).
Check the O-ring seal in the test specimen connection for proper seat and for
any wear. Replace, if necessary.
Please see to it, that each instrument mounted to the pressure balance must be
clean inside.
The quick connector comes equipped with a G 1/2 threaded insert in the standard delivery
package.
When you are calibrating devices with different connection threads, the threaded
inserts can be changed as appropriate (see accessories "Adapter Set").
Knurled nut

3.1.5 Venting the System

After the filling in of operating liquid and after the clamping of the piston/cylinder system and the test
specimen, further air may be trapped in the system. The system may be vented before beginning with
calibration using the following procedure:
The reservoir cap must be put back on and the shut-off valve of the reservoir must be mounted.
However, leave the valve open!
The piston/cylinder system and test specimen must be clamped, and the complete weight set must
be placed on the piston/cylinder system.
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).
WIKA Operating Instructions Pressure Balance Version 1.1
available (see
ngle connection 90°
O-ring 8 x 2
(see accessories section 8.)
GB
.
.
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