Testing Methods - Alcatel ASM 180 TD User Manual

The part can
be connected to
an evacuation line
yes
Its characteristics
allow it to be
evacuated
yes
SPRAY method
Leak rate measurement from
-10 -1
10 to 10 mbar and
possibility of locating the leak
Alcatel Vacuum Technology France - ASM 180 TD/TD+ - ASM 181 TD+ User's Manual

Testing methods

Leak detection is used to detect micro-openings, porosities,
etc. in test parts. The detection of these passages involves the
use of a light gas, which is capable of infiltrating the smallest
passages quickly: Helium.
The detector samples and measures the helium flow rate
entering the test part via the leak(s).
The testing method is selected according to the test part and
the measurement accuracy required:
no
The part is sealed
Its characteristics
allow it to be
no
pressurised with helium
or a mixture containing
helium
yes
SNIFFING method
Minimum detectable leak of
-6
10 mbar and possibility of
locating the leak
A 40
Its characteristics
allow it to be placed
in a vacuum
vessel
yes
BOMBING method
Leak not located
1/4