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Service Maintenance
________________________________________ Cleaning the Ion Optics and Mass Analyzer
__________________ LCQ Deca XP Plus Hardware Manual _________________
5-11
5. Remove the part from the methanol bath, then rinse it thoroughly with
fresh methanol.
6. Dry the part with a rapid stream of nitrogen gas.
7. Inspect each part for contamination and dust. If necessary, repeat the
cleaning procedure.
Reassembling the Ion Optics and Mass
Analyzer
Use the following procedure to reassemble the ion optics and mass analyzer.
See Figure 5-2.
Reassemble the mass analyzer, as follows:
1. Reinstall the analyzer posts by screwing them by hand into the analyzer
mount. (Both ends are the same.)
2. Reinstall the entrance endcap electrode onto the analyzer posts. (The
entrance endcap electrode is the one without the damping gas nipple.)
Ensure that the electrode is oriented such that the convex surface faces
away from the analyzer mount. Also, the opening in which the pin on the
end of the electrical lead inserts should be close to the top cover plate
when the analyzer mount is installed on the top cover plate.
3. Place a quartz spacer ring into the groove in the entrance endcap
electrode.
4. Reinstall the ring electrode onto the quartz spacer ring so that the spacer
ring is held securely between the electrodes. The orientation of the ring
electrode is unimportant.
5. Reinstall the second quartz spacer ring into the groove in the ring
electrode.
Note. Wear clean, lint-free, nylon or cotton gloves when you handle
components of the mass analyzer.
Caution. Handle the quartz spacer rings carefully. Do not scrape the spacer
rings against any metal surfaces. Metal deposits on the surfaces of the
spacer rings might cause the RF voltage to arc across the spacer rings to the
endcaps. Do not overtighten the mass analyzer nuts.
Содержание LCQ Deca XP Plus
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