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A 200
About leak detection
GB 04269 - Edition 05 - July 12
The general vacuum diagram of the leak detector is shown below.
A dynamic version of the vacuum diagram is available on the leak
detector display panel. Green valves indicate opened valves. Red
valves indicate closed valves.
Vacuum circuit of a
leak detector
Test Procedure:
Connect the part to be tested at the inlet of the leak detector
1
,
then press the [START/Stand by] key.
When the unit is not in test mode (stand-by or roughing mode), the
helium displayed corresponds to the internal helium background of
the unit.
Roughing Mode: Valve
3
opens and the primary pump evacuates
the inlet of the unit as well as the part connected to it.
When the inlet pressure
2
reaches the test cross over, the
roughing valve
3
closes, the exhaust valve
6
opens, the test
valve
4
opens. The high vacuum is then connected to the inlet
of the leak detector taking care of the gas load. The analyzer cell
8
will measure any helium present. The value of the leak will be
measured and displayed on the control panel.
analyzer
cell
tested
part
8
6
secondary
pumping
exhaut
valve
7
primary
pumping
5
3
4
1
2
roughing
valve
test
valve
inlet pressure
gauge
inlet
C 200
General vacuum
circuit of a leak
detector
Example:
ASM 380
Vacuum circuit
adixen Vacuum Products - ASM 380 Operating instructions