Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Pressure, Vacuum and Temperature Specifications





Three Stage Pressure Monitor
First stage
Switch-off pressure - 2.00 ± 0.25 bar (29 ± 3.6 psi)
Switch-on pressure - 2.15 ± 0.35 bar (31 ± 5.1 psi)

Second stage
Switch-off pressure - 12.50 ± 1.5 bar (181 ± 28 psi)
Switch-on pressure - 16.50 ± 1.2 bar (239 ± 17 psi)

Third stage
Switch-off pressure - 30.00 ± 2.0 bar (435 ± 29 psi)
Switch-on pressure - 24.00 ± 2.0 bar (348 ± 29 psi)





Pressure Switch, Hot-climate Markets
Switch-off pressure - 18 bar (261 psi)
Switch-on pressure - 22 bar (319 psi)