Agilent Technologies MSD 5977B Series Operating Manual page 185

7 General Maintenance
To Clean the EI HES
These are the parts that contact the sample or ion beam. The other parts
normally should not require cleaning.
If insulators are dirty, clean them with a cotton swab dampened with
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reagent-grade methanol. If that does not clean the insulators, replace them. Do
not abrasively or ultrasonically clean the insulators.
Figure 58
The filaments, source heater assembly, insulators, source mounting plate, and
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filament block cannot be cleaned ultrasonically. Replace these components if
major contamination occurs.
3 If the contamination is serious, such as an oil backflow into the analyzer,
Do not use the abrasive slurry on the source mount bushings.
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5977B Series MSD Operating Manual
Entrance
Ion focus
lens (1)
lens (2)
EI HES parts to be cleaned
seriously consider replacing the contaminated parts
Source body
Repeller
Post extractor
Post extractor
lens 1 (4)
lens 2 (3)
Extractor
lens (5)
185