What the Libra zodiac sign is all about: Libra is the seventh of the 12 zodiac signs, which begins its cycle in early fall every year during Libra seasonâwhich falls around September 23-October 22.
How it works. This schematic shows the component parts of a typical leak-down tester. The gauge on the right is held at a standard pressure by adjusting the pressure regulator while the gauge on the left shows an example reading of 85-or 15% leakage.
Use an air leak detector to find your leaks. 1  Turn the device on and point it at the areas where you suspect leaks. 2  A small light coming from the device will scan the area you are pointing at. 3  If there is a leak, the light will turn blue if the leaking air is cold, it will turn red if the leaking air is warm.