VS Series Helium Mass Spectrometer Leak Detectors
DRAFT 4/23/15
3-9
To manually t u n e the leak d e t e ctor:
1. Place the system in TEST mode.
2. Navigate to the Control Panel and turn the STD LEAK ON.
3. Navigate to the Calibration Set-Up screen and write down the INTERNAL CALIBRATED
LEAK value. This value is temperature compensated.
4. Navigate to the Manual Tuning screen and:
❑ Set the GAIN to 1.0.
❑ Set the EMISSION to between 0.600 and 0.6500.
❑ Adjust the ION value up or down to attain the maximum value. Ideally, the ION
value should be between 250 and 270.
❑ Adjust the EMISSION to attain the maximum value. Ideally, the EMISSION value
should be between 0.600 and 1.200.
❑ Set the GAIN so that the leak rate on the screen matches the value of the internal
leak you wrote down.
5. Navigate to the CONTROL PANEL and turn the STD LEAK OFF.
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