84 Troubleshooting and Maintenance Manual
4 General Maintenance
1 Vent the MS. See the Agilent 7000 Series Triple Quad GC/MS Operation
Manual.
2 Remove the column.
3 Disconnect the collision gas supply tubing.
4 Install a plug on the end of the collision gas tubing that leads into the
analyzer chamber.
5 Move the MS away from the GC.
6 Unplug the GC/MS interface heater cable from the GC.
7 Remove the front analyzer window and open the left side analyzer panel.
See “To remove the MS covers” on page 80.
8 Finger-tighten the side plate thumbscrews for both analyzers. (Figure 5).
9 Switch the MS on to establish a rough vacuum.
10 When you hear the hissing sound of the pumpdown, close the vent valve.
Continue the pumpdown for 2 to 3 minutes.
11 Switch the MS off.
12 Close the analyzer cover and replace the front analyzer window.
13 Disconnect the LAN, remote, and power cable.
Do not overtighten the side plate thumbscrews. Overtightening will strip the threads in
the analyzer chamber. It will also warp the side plate and cause leaks.
Always wear clean gloves while handling any parts that go inside the analyzer
chambers.
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