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3
System Shutdown, Startup, and Reset
Turning Off Selected Mass Spectrometer Components
Table 5. On/off status of mass spectrometer components, voltages, and gas flows (Sheet 1 of 2)
Mass spectrometer component
Vent valve
Standby
mode
Off
mode
Electronics
service switch,
Service Mode position
Main Power switch,
Off (O) position
Closed
Closed
Closed
Open (5 sec)
APCI corona discharge needle
APCI vaporizer
Conversion dynode
Electron multiplier
ESI needle
Gas, auxiliary
Gas, sheath
Off
Gas, sweep
Ion optics multipoles rf voltages
Off
Mass analyzer, rf/waveform voltages
Power supply, 8 kV
Power supply, electron
multipliers/conversion dynodes
Off
API ion transfer tube dc offset
Off
API tube lens
Ion optics lens
Ion optics multipoles dc offset voltages
Mass analyzer, dc offset voltage
Power supply, 300 Vdc
API ion transfer tube heater
Fan, rf coil
On
Gauge, Convectron
Gauge, ion
Power supply, PS1
On
Fan, turbomolecular pump
Fans, electronics tower
Forepump
On
Power supply, PS2
42
LTQ Series Hardware Manual
Thermo Scientific