General Maintenance 6
5977B Series MSD Operating Manual 161
These are the parts that contact the sample or ion beam. The other parts
normally should not require cleaning.
3 If the contamination is serious, such as an oil backflow into the analyzer,
seriously consider replacing the contaminated parts
.
If insulators are dirty, clean them with a cotton swab dampened with reagent-grade
methanol. If that does not clean the insulators, replace them. Do not abrasively or
ultrasonically clean the insulators.
Figure 50 EI HES parts to be cleaned
Lens 1 2 3 4 5
Source body
Repeller
Source mount
Filament block
with bushings
The filaments, source heater assembly, and insulators cannot be cleaned
ultrasonically. Replace these components if major contamination occurs.
Do not use the abrasive slurry on the source mount bushings.
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