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VENT
TEST
HOLD
Agilent Helium Leak Detector User Manual
The VENT button advances the leak detector to the vented state.
The red vent symbol in the middle of the switch remains red while
the leak detector is in Vent.
When the system is in the Vent or Hold states, pressing the TEST
button automatically advances the leak detector through roughing,
then through the various test states, depending on the achievable
test port pressures and leak rates.
Press the TEST button while in TEST to isolate the test port from
the leak detector vacuum system.
With the leak detector in Test/Fine Test mode, press TEST again
and the leak detector goes into HOLD mode, isolating the leak
detector from the unit under test.
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