Creating Vacuum; Pressure / Vacuum Measurements - SIKA P40.2 Notice D'utilisation

P40.2 / P60

5.2 Creating vacuum

Vacuum creation - operating steps
 Switch on reference gauge and test item (if

necessary).
 Close pressure relief valve:

• Turn the knob of the valve in a clockwise direc-
tion until the stop is reached.
 Set the switch valve to 'vacuum':

• Turn the knob of the valve in an anti-clockwise
direction until the stop is reached.
 Create vacuum:

• Push the hand grips together:
The springs create the first negative pressure,
but cannot completely open the hand grips.
• Now pull the hand grips apart until the stop is
reached.
• Push the hand grips together again: the vac-
uum is increased.
• Repeat this process several times (depending
on the volume of the test item) until the desired
vacuum has been reached.
 Adjust the testing pressure.

The necessary testing pressure is adjusted pre-
cisely with the fine adjustment valve:
• Turn the handwheel of the valve in a clockwise
direction to decrease the vacuum.
• Turn the handwheel of the valve in an anti-
clockwise direction to increase the vacuum.
• Set the necessary testing vacuum by turning
the wheel as needed.

5.3 Pressure / vacuum measurements

For adjustments, calibrations or an inspection of accuracy, it is vital that the test item and the
reference have the same pressure / vacuum.
The pressure / vacuum needed for the test points is built up and adjusted with the hand pump
( § . 5.1 + 5.2).
The pressure relief valve makes a regulated, continuous decrease in pressure possible, ena-
bling measurements to be carried out accurately and simply even when the pressure is fal-
ling.
The necessary procedures for measuring pressure or vacuum are configured by the opera-
tor.
Carrying out the pressure or vacuum measurements:
Carry out the necessary tests and measurements.

 Document your results.
Technical changes reserved.
Operation
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