WIKA CPP 7000-X, Руководство по эксплуатации, Страница: 19 / 60

6. Commissioning, operation
WIKA Operating Instruction, model CPP7000-X 19
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Then run the initial pressure pump for several strokes. The pressure increases to a maximum
of about 50 bar (725 psi) (depending on the volume of the connected instruments).
CAUTION!

Before generating initial pressure, check if the user handles are tightened
(e. g. black plastic topping of the priming pump).

Before generating initial pressure, check if the connection to your device
under test and reference instrument is tightened.

See max. torque for connection and test item column. (see chapter 6.1.2)
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The high-pressure shut-off valve must be closed after pre-pressure generation.
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After that, increase the pressure resp. make a fine adjustment by turning the built-in spindle
pump clockwise to approach the calibration points.
WARNING!
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 (1,450 psi)) additionally protects
the low-pressure circulation from any errors on the operator’s part.
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Now you can compare the indication of the test specimen with the reference instrument at
each calibration point.
Information
If small amounts of air are compressed in the system together with medium, the test
pressure that has been generated first drops off slightly. After this it must be
readjusted.
A longer waiting time before stable operating conditions are reached should be
expected at higher pressures than at lower pressures.