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Technical Information
At the main screen, the system blinks the split flow symbol
is ON.
When split flow is turned ON, it displays the corrected leak rate but it knows the
real leak rate value.
When ZERO is pressed with when split flow ON, the system zeros out
background up to a limit equal to the maximum split flow value.
To activate split flow:
1
Place the system into TEST mode and let the leak rate stabilize. Calibrate the
system.
2
Press the Split Flow blue check button. The leak detector prompts you to enter
the leak rate for the customer's calibrated standard leak (what the leak rate
should be).
The leak detector displays the corrected leak rate, essentially calculating a split
flow gain value. The leak detector automatically calculates the split flow factor,
turns on and calculates the range stop, based on the split flow factor.
When Split Flow is turned OFF, the system reverts back to the uncorrected leak
rate. This process must be repeated when reactivating split flow.
To setup:
1
Connect the leak detector and secondary rough pump to the test chamber as
seen in the previous figure.
2
Install the External Calibrated Leak on the test chamber.
3
Press Test on the leak detector.
4
Open valve on secondary rough pump to evacuate test chamber.
5
Select Test Configurations > Applications Setup and the following figure
appears.
6
Select Split Flow and press Setup and the following figure appears:
98
The information icon provides the necessary directions for a
successful external calibration.
Agilent Helium Leak Detector User Manual
when split flow
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