Agilent Technologies VS Series Operation Manual page 93

VS Series Helium Mass Spectrometer Leak Detectors
To manually tune the leak detector:
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.
3-9