Thermo Scientific TSQ Altis, Quantis, and Fortis Hardware Manual 33
Shutting the MS System Down Completely
Shut down the MS system completely only when you are not using it for an extended period
of time or when you must shut it down for maintenance or service. Also turn off the LC,
gases, data system and autosampler.
• Shutting the MS Down Completely
• Turning off the LC, Gases, Data System, and Autosampler
Shutting the MS Down Completely
1. Follow the procedure, Chapter 8, “Placing the MS in Standby Mode.”
2. Find the electronics service switch on the right-side power panel (Figure 20).
3. Switch it into the Service Mode (down) position.
This turns off all LEDs on the front panel and the power to the nonvacuum system
electronics.
4. Turn off the Main Power switch.
• The ion transfer tube heater and the ion optics voltages turn off.
• All power to the MS, including the turbomolecular pumps and the forepump goes
off.
• After approximately 5 seconds, power to the vent valve solenoid shuts off, the vent
valve opens, and the vacuum manifold vents with dry nitrogen. This creates a hissing
sound.
• After about 2 minutes, the vacuum manifold is at atmospheric pressure.
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