Ppm Sniff Method - Agilent Technologies G8610A Operation Manual

5.1.3.10 PPM (parts per million) Sniff Method
Certain test protocols specify parts per million (PPM) units for measuring leak rates. This test
method is only to be used with a suitable sniffer probe, it is not intended for vacuum leak
testing. Settings available and features in this mode include:
❑
Setting the value of helium concentration to be used for calibration.
❑
Step-by-step guidance to calibrate to a known concentration.
❑
Using a mass flow meter (optional) for accurate measurement regardless of pressure.
❑
Entering set point values for audible and visual alarms.
❑
Establishing an alarm should the sniffer probe become plugged.
To run this:
1. Select Test Configurations > Applications Setup.
2. Select PPM Sniff Method, press Set-Up and Figure 5-14 appears.
3. Ensure that the leak detector must be in Test and setup for a sniffing application as
shown in Figure 5-15. The test port pressure appears in the top left hand corner of the
setup screen (Figure 5-14).
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Agilent Technologies Helium Leak Detector
Calibrate the leak detector prior to the PPM Sniff Application.
NOTE
Figure 5-14 PPM Sniff Method