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Technical Information
Locating Leaks
To pinpoint the location of the leak(s) (but not measure the total leakage), the likely
potential leak sites of the part are scanned using a Sniffer Probe connected to the
inlet of the leak detector (see the following figure).
Figure 93
Accumulation Testing Method
This method can both locate and quantify leaks. Some type of shroud or hood is
placed in such a manner as to envelop a potential leak site. A certain amount of
time is given to allow leaking helium to accumulate in the shrouded area, increasing
the helium concentration. The leak detector is then valved-in to the shrouded
volume. If many potential leak sites exist in a manifold or if many parts are to be
tested at the same time, they can be sequentially valved-in to determine which site
is leaking (see the following figure).
Figure 94 Accumulation: Inside Out
166
Mount Test
Part
Agilent Helium Leak Detector User Manual
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