4
Upgrade Equipment
Ion Gauge and Tube Shield
Thermo Scientific
TSQ 9000 Hardware Manual
437
Ion Gauge and Tube Shield
An ion gauge measures the pressure inside the vacuum manifold and produces energetic
electrons to ionize molecules. Positive ions formed in the ion gauge are attracted to a collector.
If you have an ion gauge, it must be powered on and the pressure must be less than
1x10-3 Torr to turn on the filament, electron multiplier, or conversion dynode. This pressure
setting protects these components from being damaged.
To install an ion gauge and tube shield
1. Shut down your system by following the steps in
“Shutting Down the TSQ 9000 System”
.
2. Slide the top cover panel toward the back of the instrument and lift it off.
3. Move the GC away from the TSQ 9000 instrument.
4. Use a T20 Torxhead screwdriver to remove the five screws on the right side panel.
5. Lift the right side panel off the instrument.
6. Attach the ion gauge shield and tube to the board, as shown in the figure below.
Figure 470.
Removing the Right Side Panel Screws
Note
The metal tube can be placed on the board in two different ways. Only one of the
orientations will allow the tube to attach correctly to the manifold.
Right Side
Panel Screws
Содержание TSQ 9000
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