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Next: 7.2.3 Small High Vacuum Up: 7.2 High Vacuum Leaks Previous: 7.2.1 General Leak Checking   Contents

7.2.2 Large High Vacuum Leaks

If the leak is sufficiently large that the MS cannot be safely turned ON, the Ion Gauge can sometimes be used as a 'leak detector.' With the Gauge Power and Filament ON, spray in the detection gas in small areas while watching the Gauge Meter. A rapid increase in the pressure will be observed when the leak is sprayed. This method is less reliable than when the MS itself can be used.

John S. Riley, DSB Scientific Consulting