During a “blank off” test, you may often ask, “What is an acceptable rate of rise?” Or, “Why does the system leak, but only in a vacuum?” To understand what is really happening, you should be asking, “Where does the micron reading STOP rising?”

Typical AC/R vacuum gauges begin measuring at 25,000 microns (or less), which is only the last 3% of the evacuation process. Since the vapor pressure of moisture can exceed 50,000 microns on a hot day, and a leak will rise to atmospheric pressure, full-range measurement is an essential tool in evacuation verification.



This video helps show exactly why a full range vacuum gauge should have a permanent place in your toolbox, and how it can easily help you stop chasing leaks that might not even exist.



For more info on Appion’s Full-Range AV760 Vacuum Gauge, visit [ Ссылка ]

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