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System Shutdown, Startup, and Reset
Shutting Down the System Completely
52 TSQ Series Hardware Manual Thermo Scientific
Shutting Down the System Completely
Shut down the TSQ system completely if not in use for an extended period only, or if it must
be shut down for a maintenance or service procedure. For a short period of time, such as
overnight or over weekends, you can place the system in standby. See “Placing the System in
Standby Condition.”
To shut down the TSQ system completely
1. Turn off the flow of liquid from the LC (or other sample introduction device) to the API
source. To turn off the flow of liquid from the LC to the API source, do the following:
a. Choose Start > All Programs > Thermo Instruments > TSQ > TSQ Tune to open
the EZ Tune window.
b. In the EZ Tune window, choose Setup > Inlet Direct Control. The Inlet Direct
Control view appears.
c. Click the LC’s tab and click (Stop) to stop the LC pump.
2. From the EZ Tune window, choose Control > Off (or click the On/Standby/Off button)
to turn off the mass spectrometer.
3. Place the Electronics service switch, located on the power panel (see Figure 35 and
Figure 36), in the Service Mode position.
4. On the TSQ Quantum Access or TSQ Quantum Access MAX, place the Vacuum service
switch, located on the power panel (see Figure 36 on page 50), in the Service Mode
position.
5. Place the Main Power circuit breaker switch, located on the power panel (see Figure 35
and Figure 36) in the Off (O) position. When you place the Main Power circuit breaker
switch in the Off (O) position, the following occurs:
• All power to the mass spectrometer is turned off. (All LEDs on the front panel of the
mass spectrometer are off.)
• A capacitor on the Vent Delay PCB provides power to the vent valve for two to four
minutes (to allow the turbomolecular pump to spin down). After the capacitor
discharges, power to the vent valve solenoid shuts off. When power to the vent valve
solenoid shuts off, the vent valve opens and the vacuum manifold is vented to filtered
air or nitrogen.
• After about two minutes, the pressure of the vacuum manifold reaches atmospheric
pressure.
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