Ametek Mocon Dansensor LeakPointer 3, User Manual

Page: 15 / 100

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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