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A 200
About leak detection
GB 03302 - Edition 03 - July 12
He
He
START
STAND-BY
START
STAND-BY
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.
This involves removing air from the part tested, connecting it to the
analyzer cell and then spraying helium over the outer surface.
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
part
spray probe
detector
Spray test
The detector measures the flow of helium penetrating the part.
Connection rules: refer to
B 300
or
part
detector
adixen Vacuum Products - ASM 310 Operating instructions
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