Adixen ASM 310 - Sniffing Method

GB 03302 - Edition 03 - July 12
5/11
A 200
About leak detection
He
START
STAND-BY
He
START
STAND-BY
or
The sniffer probe is moved over
areas likely to contain leaks.
The leak can be located.
The signal supplied by the
analyzer is not a exact
measurement of the leak.
The sniffer probe only samples
part of the helium escaping
from the part. The sample
depends on the distance
separating the leak from the tip
of the probe.
The part is placed under a
cover containing a sniffer
probe.
The leak cannot be located.
The helium from the leak
accumulates over time inside the
cover. The detector measures
the concentration of helium.
Global test
Local sniffing test
Sniffing method
The test part is pressurized with helium. The detector, via a sniffer
probe samples the helium escaping from the part.
Global test is generally kept for gross leaks (> 10
-3
mbar l/s). In 90 %
of uses, the sniffing method is used in local.
part
Sniffer probe
detector
part
detector
Sniffer probe
adixen Vacuum Products - ASM 310 Operating instructions