Ion Gauge And Tube Shield - Thermo Scientific TSQ 9000 Hardware Manual

Ion Gauge and Tube Shield

Thermo Scientific
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
on page 127.
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.
Figure 470. Removing the Right Side Panel Screws
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.
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.
"Shutting Down the TSQ 9000 System"
Right Side
Panel Screws
TSQ 9000 Hardware Manual
4
Upgrade Equipment
Ion Gauge and Tube Shield
437