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.
When you perform a static compression or cylinder leak-down test, youâre checking the sealing capability of each cylinder. A vacuum test is a great way to determine an engineâs overall breathing capabilities but does not provide results for individual cylinders.