Varian 979


Ive got a Varian 979 leak tester, however after a few runs the fine leak test does not work.  If I use "Read standard Leak" then after it fails to switch on fine leak test.

Can you please point me in the correct direction.



  • John, there are four reasons the leak detector will not enter "fine test". One is if you have the green sniffer button pressed (maybe accidently). Two is if you have enabled a range stop in the menus. Three, the test port pressure must be below 100 mT. Four, the leak rate reading must be less than 1 E-7, and trending down. Check it out and let me know. Or call me at 800 882-7426, option 5.

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