Reducing Pressure - WIKA CPP700-H Manual De Instrucciones

5. Commissioning, operation
3. Unscrew the fine adjustment valve
stops.
4. Carefully screw the pressure relief valve
closes securely.
5. By means of the pump handle
generated.
⇒
The handles can now hardly be pressed together. Depending on the volume of the
calibration circuit, a pressure of 200 ... 400 bar (2,900 ... 5,800 psi) is generated in
the "initial pressure generation" position.
6. Hold the handles
⇒
The pump handles
If too high an initial pressure has been generated, the pump handles
no longer be completely pressed together and the toggle control
longer be actuated
In this case, drain the built-up initial pressure by unscrewing the pressure
relief valve
7. Now, by means of the pump handles
reached, but up to a maximum of about 600 bar (8,700 psi).
⇒
A test pressure higher than about 600 bar (8,700 psi) is achieved only by turning
the fine adjustment valve
After increasing the pressure, the value displayed can drop slightly again
for about 30 seconds. The causes can be thermodynamic effects, the hose
connection and the sealings.
Readjust the test pressure using the fine adjustment valve
continues to drop, check the measuring circuit for leaks.

5.8 Reducing pressure

Do not disassemble the reference instrument or the test item until the
pressure relief valve
1. To reduce the pressure, turn the fine adjustment valve counterclockwise.
2. Carefully open the pressure relief valve
⇒
Pressure is reduced and there is no pressure on the hand test pump.
3. Dismount the reference pressure measuring instrument and/or the test item.
4. After the pressure has been relieved, close the pressure relief valve
clockwise.
WIKA operating instructions, models CPP700-H and CPP1000-H
by turning it counter-clockwise, until it slightly
4
, pump the system until an initial pressure is
5
pressed together and press the toggle control
5
are now in the "high-pressure generation" position.
5
.
2
5
clockwise.
4
is open and there is no pressure in the test pump.
2
by turning it clockwise, until the valve
2
, pump until the desired test pressure is
by turning it clockwise no more than once.
2
EN
.
6
can
5
can no
6
. If pressure
4
2
by turning it
15