Vacuum Switch
- Check that there is no continuity between terminals with a vacuum of 170 ± 10 mm Hg (6.69 ± 0.39 in. Hg, 22.7 ± 1.3 kPa) or above. See Fig 1.
- Check that there is continuity between terminals with no vacuum.
- If operation is not as specified, replace the switch.