MS Detector Maintenance
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____________________________________________________Replacing the Electron Multiplier
_______________________ Finnigan LTQ Hardware Manual _____________________
4-41
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12. Reinstall the two socket-head screws that secure the electron multiplier
support to the top cover plate. Tighten the screws with an Allen wrench.
13. Repeat steps 11 and 12 with the second electron multiplier.
14. Reinstall the top cover plate of the vacuum manifold over the opening in
the vacuum manifold as described in the topic Reinstalling the Top
Cover Plate of the Vacuum Manifold on Reinstalling the Top Cover
Plate of the Vacuum Manifold on page 4-36.
15. Reinstall the top cover of the MS detector as described in the topic
Reinstalling the Top Cover of the MS Detector on page 4-37.
16. Start up the LTQ system as described in the topic Starting Up the System
After a Complete Shutdown in the System Shutdown, Startup, and
Reset chapter.
17. Set the electron multiplier voltage to -800 V as follows:
Figure 4-17. Electron multipliers and dual anode
Electron
Multipliers
Anode
Shield
Dual
Anode
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