Use the three power mode icons in the Tune window to set the power mode for the MS (On, Standby, or Off ).
When you remove the housing or the spray insert, the MS automatically switches to Off mode.
In Standby mode, the System LED on the front panel turns yellow and the MS turns off the electron multiplier, conversion dynodes, 8 kV power to the source housing, main RF voltage, and ion optic RF voltages. The auxiliary, sheath, and sweep gas flows remain on and return to their standby default settings (2 arbitrary). See System startup, shutdown, and reset.