7 General Maintenance
To Assemble the EI XTR Source
182 7000/7010 Series TQ GC/MS Operating Manual
To Assemble the EI XTR Source
Materials needed
• Gloves, clean, lint-free (Large 8650-0030) (Small 8650-0029)
• Hex ball driver, 1.5 mm (8710-1570)
• Hex ball driver, 2.0 mm (8710-1804)
• Wrench, open-end, 10 mm (8710-2353)
Procedure
Refer to the exploded parts view and the EI XTR parts list while using this
procedure. (See Figure 59 and Table 18 on page 183.)
1 Assemble the ion focus lens, extended entrance lens, and lens insulator. (See
Figure 59 and Table 18 on page 183.)
2 Attach the extractor lens insulator to the extractor lens, and slide them into
the source body. (See Figure 59 on page 183.)
3 Slide the parts assembled in step 1 into the source body.
4 Install the setscrew that holds the lenses in place.
5 Assemble the repeller assembly by attaching the repeller, repeller insulators,
washers, and repeller nut onto the source heater assembly.
6 Attach the repeller assembly to the source body with two screws and
washers.
7 Install the filaments. (See “To Install a Filament on the EI XTR Source” on
page 191.)
Always wear clean gloves when working in the analyzer chamber to avoid
contamination.
While installing, do not overtighten the repeller nut or the ceramic repeller
insulators will break when the source heats up. The nut should only be
finger-tight.
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