Product description
6.4.2 Sniffing test method
Part that can be connected to pipe and cannot be placed under a vacuum.
The part to be tested is pressurised with tracer gas.
The detector measures the flow of tracer gas that leaks out of the part through a sniffer
probe that moves across all the points prone to leaking.
The detector measures the flow of tracer gas that leaks out of the part.
The measured leak rate is not an exact measurement of the leak. The sniffer probe only
detects part of the tracer gas escaping from the part, depending on the distance sepa-
rating the crack from the tip of the probe, and the direction of the leak in relation to the
probe.
– Remove the air from the part to be tested
.
– Connect the part to be tested to the leak detector inlet port.
The various test stages are displayed.
When the detector has reached the most sensitive test mode, wait for the
measurement to stabilise: the measurement displayed corresponds to the measured
leak rate.
Stop the test by pressing
.
The test can also be started using a remote control (accessory):
see
Remote control
Operating instructions.
Procedure
Set the reject set point
if necessary
(see 7.3.4) .
With the leak detector in Stand-by mode, connect the sniffing probe (accessory) to
the provided connector ( ).
Start a test by pressing
Slowly scan, with the sniffer probe, the areas of the part to be tested with potential
leak: the displayed leak rate varies in presence of a detected leak (qualitative value
of the measured leak rate).
Stop the test by pressing
Start a test by pressing
.
–
Spray tracer gas on the points of the part that are likely to leak.
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