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A 200
About leak detection
GB 04269 - Edition 05 - July 12
The part is placed under a
cover, into which helium is
injected.
The leak cannot be located.
Potential leaking areas are
sprayed with helium.
The leak can be located.
Global test
He
He
START
STAND-BY
START
STAND-BY
part
spray probe
Spray test
Spray method
Response time
When spraying starts, the leak signal is not displayed instantaneously
on the analyzer cell:
there is a response time which depends on the volume V being
tested and the helium pumping speed S of the system at the opening
of the part, according to the following relation:
T = V/S (T in second, V in litre, S in l/s)
T is the time required for the signal to reach 63 % of the final value.
The detector measures the flow of helium penetrating the part.
Connection rules: refer to
B 300
This involves removing air from the part tested, connecting it to the
analyzer cell and then spraying helium over the outer surface.
or
part
detector
detector
adixen Vacuum Products - ASM 380 Operating instructions
Summary of Contents for adixen ASM 380
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