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6
Vacuum System
Side Plate
The side plate covers the large opening in the side of the analyzer chamber. The
analyzer assembly is attached to the side plate inside the analyzer chamber.
Several electrical feedthroughs are built into the side plate. Wires connect the
feedthroughs to analyzer components.
Thumbscrews are located at each end of the side plate. We recommend that the
thumbscrews be loosely tightened
Fasten the side plate thumbscrews for shipping or storage only. For normal
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operation, both thumbscrews should be loose. Overtightening will warp the
side plate and cause air leaks. Do not use a tool to tighten the side plate
thumbscrews.
When you turn on the power to pump down the MS, press on the side plate to
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ensure good seals.
Vacuum Seals
Several types of Viton elastomer O-ring seals are used to prevent air leaks into
the analyzer chamber. All these O-rings, and the surfaces to which they seal,
must be kept clean and protected from nicks and scratches. A single hair, piece
of lint, or scratch can produce a serious vacuum leak. Three of the O-rings are
lightly lubricated with Apiezon-L vacuum grease: the side plate O-rings and the
vent valve O-ring.
Contact Agilent to have these vacuum seals serviced.
110
7250 Accurate-Mass Q-TOF Troubleshooting and Maintenance Manual
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Table of Contents
Troubleshooting
