Thermo Scientific TSQ 9000 Hardware Manual page 250

3
Advanced Troubleshooting
Replacing Components of the Ion Source
222 TSQ 9000 Hardware Manual
2. Click Yes to continue the shutdown process. The high voltages, heaters, and
turbomolecular pump power off. Once the turbomolecular pump reaches 50% speed, or
five minutes elapses, the foreline pump powers off and you may vent the system.
Note The amber vacuum light on the front of the instrument starts blinking rapidly,
indicating the mechanical pump has powered off after a five minute period with the
turbomolecular pump off (such as when the instrument is shut down), or due to a
sustained vacuum fault lasting five minutes. When the turbomolecular pump spins down
below 50% speed due to the shut down process, the vacuum light turns off.
3. Reach around the left side to the back of the instrument and push down on the power
switch to power-off the instrument.
4. Open the front door of the TSQ 9000 mass spectrometer.
5. Open the front door of the instrument.
6. Twist the vent valve knob one and a half times in a counter-clockwise direction to open
the vent.
Figure 216. Venting the TSQ 9000 Mass Spectrometer
7. Wait five minutes for venting to complete.
CAUTION - INSTRUMENT DAMAGE Do not proceed until the instrument is vented, or
pieces of the column or ferrule might blow into the instrument. To ensure that the
instrument is vented, check how much the glass cover compresses the top cover o-ring in
the manifold. Once the o-ring surface touching the glass is about 1 mm, it is safe to open
the instrument and remove the column.
Vent Valve Knob
Thermo Scientific