Dansensor® LeakPointer 3/3
+
EN User Guide 13
P/N 380064-F
06/2021
Measuring principle
The actual leak testing takes place inside the vacuum chamber. The procedure is as follows:
Without PackFix (Single Package or Multi Package)
1. The package is placed in the chamber and the measurement sequence starts when
the chamber is closed.
2. When vacuum builds up inside the chamber, the package will expand, thus creating a
positive pressure (Delta P) inside it and if there is a hole
in the package, CO
2
will leak
from inside the package and out into the chamber.
A sample pump sucks gas from the chamber through a sensor that detects the increased
CO
2
level and reports it as a leak.
3. Since this type of measurement is not made on the basis of a predetermined Delta P value,
the measurement result will be stated as the increase in the CO
2
level measured in the
chamber (in ppm/s).
4. When the measurement is complete, the vacuum is released from within the chamber and
the chamber
opens.
With PackFix (Single Package only)
1. The package is placed in the chamber and the measurement sequence starts when
the chamber is closed.
2. When vacuum builds up inside the chamber, the package expands and pushes against the
PackFix mechanism
. This creates a consistent positive pressure (Delta P) inside the
package and if there is a hole
in the package, CO
2
will leak from inside the package and
out into the measuring chamber.
A sample pump sucks gas from the chamber through a sensor that detects the increased
CO
2
level and reports it as a leak.
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