5 General Maintenance
128 5975/5977 Series MSD Operating Manual
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 38. 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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