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Technical Information
Test Time
The Test, Vent and Zero functions are available in this application setup. The Test
NOTE
and Vent buttons aid in setting up the Rough and Test Timers. The Zero function is
extremely helpful in zeroing out unwanted background associated with the test
fixture. The zeroing set up helps in reducing the test time.
Auto Sequencer Set-Up
Attach the test fixture with the part to be tested (known good test object) on to the
leak detector test port.
Rough Time Setup
Determines the amount of allowable time for the leak detector to evacuate the test
object to the Transfer Point - Transfer Pressure.
To test:
1
Select Test Configurations > Advanced Features > Setup.
If the transfer pressure is not achieved within the pre-selected rough time, the
system aborts the cycle and goes into Hold mode.
Factory Default - Transfer Point (Transfer to Test Pressure) is 1 Torr.
NOTE
Do not activate or program any Set Points.
2
Program the Rough Timer for some unrealistic amount of time, like 200 secs.
3
Program Test Time for 30 secs and press Test. Allow the test to complete
(system vents).
4
Program the Rough Time as displayed in the Rough Time window.
Agilent Helium Leak Detector User Manual
This setting tells the system when to perform the test against the
set point values. For example, you may set 20 seconds for the
Test Time. At the end of 20 seconds, the system determines if
the part has passed or not and then makes an indication by
either going to VENT (Pass) or going to HOLD (Fail) and
displaying the reject set point failure on the Home screen.
The final leak rate value appears on the Home screen regardless
of a pass or failed criteria. The next test cycle (pressing Test)
clears the leak rate value (setup below).
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