7 CI Maintenance
220 5977B Series MSD Operating Manual
To Assemble the CI 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 Figure 72 and the CI source parts list
Table 24 on page 221 while using this procedure.
1 Assemble the ion focus lens, entrance lens, and lens insulator.
2 Slide the drawout plate and the drawout cylinder into the source body.
3 Slide the parts assembled in step 1 into the source body.
4 Install the setscrew that holds the lenses in place.
5 Attach the ceramic disk to the repeller and place on top of the source body.
6 Place the heater block assembly on top of the source body.
7 Reinstall the dummy filament, and the filament and attach with the
setscrews.
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 insulator
will break when the source heats up. The nut should only be finger-tight.
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