WIKA CPP1600-X - Handbuch (Seite 10)

Comparison Test Pump GB
CPP 3000-X / CPP 5000-X / CPP 7000-X
WIKA Operating Instructions Comparison Test Pump Version 2.1 10
3.1.3 Venting the system .
After the clamping of the test specimen and the reference instrument, air may be trapped in the
system. The system may be vented before beginning with calibration using the following procedure:
The test specimen and the reference instrument must be clamped
Close the low-pressure shut-off valve
Open the high-pressure shut-off valve
Generate a pressure of approximately 50 bar using the initial pressure pump
Close the high-pressure shut-off valve
Increase the pressure with the spindle pump until just below the final value of the measuring range
of the test specimen or of the reference instrument (the smaller pressure range is the decisive
factor).
Carefully open the high-pressure shut-off valve, any trapped air will escape into the tank
Open the low-pressure shut-off valve
This procedure may need to be repeated several times in order to remove all trapped air.
Opening the high-pressure shut-off valve without first turning out the spindle pump in counter-
clockwise direction in order to relieve the system on initial pressure is permitted only with the venting
procedure described herein.
After generating initial pressure, the high-pressure shut-off valve must always
be closed before pressure is increased using the spindle pump. An integrated
safety overflow valve (adjusted to approximately 100 bar) additionally protects
the low-pressure circulation from any errors on the operator’s part.
The device is now ready to use.