Turning On The Mass Spectrometer; Shutting Down The Mass Spectrometer Completely - Thermo Scientific LTQ Series Hardware Manual

3
System Shutdown, Startup, and Reset

Turning On the Mass Spectrometer

Turning On the Mass Spectrometer
On Standby

Shutting Down the Mass Spectrometer Completely

36 LTQ Series Hardware Manual
 To turn on the mass spectrometer
1. Open the Tune Plus window (see
2. Click the On/Standby button to select the On mode.
The System LED on the front panel turns green. The high voltage to the electron
multipliers turns on.
Shut down the LTQ Series mass spectrometer completely only if it is not in use for an
extended period of time or if it must be shut down for maintenance or service. You do not
need to shut down the system completely if you are not going to use it for a short period of
time, such as overnight or through the weekend. Instead, put the system into standby mode as
described in "Placing the Mass Spectrometer in Standby Mode"
CAUTION HOT SURFACE Allow heated components to cool to room temperature
(approximately 20 minutes) before servicing them.
 To shut down the mass spectrometer completely
1. Turn off the flow of sample solution from the LC (or other sample introduction device).
.
Note For instructions about operating the LC from the front panel, refer to the LC
manual.
2. Follow the procedure,
3. Place the electronics service switch, which is located on the right side of the instrument,
in the Service Mode (down) position.
This turns off the power to the nonvacuum system electronics.
4. Turn off the Main Power switch.
The following occurs:
• All power to the mass spectrometer, including the turbomolecular pump and
forepump or pumps, turn off. All LEDs on the front panel are off.
• After approximately 5 seconds, power to the vent valve solenoid shuts off, the vent
valve opens, and the vacuum manifold vents to filtered air. You can hear a hissing
sound as the air passes through the air filter.
• After about 2 minutes, the vacuum manifold is at atmospheric pressure.
page 34).
"Placing the Mass Spectrometer in Standby Mode"
on page 35.
on page 35.
Thermo Scientific