4
Operation (Pressure)
Turn the fine adjustment valve counterclockwise until it is fully open. Approximately
halfway, if you do not need to use the full pressure range of the pump.
Pump to raise the pressureclose to the next calibration point. Use the fine adjustment
to raise the pressure to the calibration point.
Notes.
The maximum pumping pressure is approximately 25-30 bar. The rest of the
pressure is done using the fineadjustment valve. The total maximum pressure
value depends on the volume of the calibration circuit.
After increasing the pressure, the reading may slightly drop again for about 30
seconds. This is caused by thermodynamic effects, the tube connection and
the sealing gaskets. If the pressure does not come to a standstill, check the
measuring circuit for tightness.
When the calibration point with the highest pressure value is reached and there is no
need for calibration points with decreasing pressure, either
Open the release valve, close it and start a new calibration repeat, or
continue to chapter When Calibration is Done on page 5.
If there is need for calibration points with decreasing pressure, carefully open the
release valve to decrease the pressure. When getting close to the required pressure,
close the release valve and use the fine adjustment valve to lower the pressure to the
calibration point. Again, wait for approximately 30 seconds for the pressure to stabi-
lize.
When the last calibration point is done, either do another calibration run or continue
to chapter When Calibration is Done on page 5.
WARNINGS!
Do not exceed the max. operating pressure of the pump and the hose.
If there is a strong counterforce while operating the handles, but no pressure
increase is indicated, stop pumping and locate the fault. Always keep a reliable
indicator connected to the measurement system.
A full list of warnings is on page 9.
