7 General Maintenance
To Clean the EI HES
7000/7010 Series TQ GC/MS Operating Manual 171
To Clean the EI HES
Materials needed
• Abrasive paper (5061-5896)
• Alumina abrasive powder, 100 g (393706201)
• Aluminum foil, clean
• Cloths, clean (05980-60051)
• Cotton swabs (5080-5400)
• Glass beakers, 500 mL
• Gloves, clean, lint-free (Large 8650-0030) (Small 8650-0029)
• Solvents
• Methanol (reagent-grade)
• Methylene chloride (reagent-grade)
• Acetone (reagent-grade)
• Ultrasonic bath
Procedure
1 Disassemble the ion source. (See “To Disassemble the EI HES” on page 165
or “To Disassemble the EI XTR Source” on page 168.)
2 Collect the following parts to be cleaned if you are cleaning an EI HES: (See
Figure 54 on page 172.)
• Repeller
• Source body
• Extractor lens (5)
• Post extractor lens 1 (4)
• Post extractor lens 2 (3)
• Ion focus lens (2)
• Extended entrance lens (1)
These are the parts that contact the sample or ion beam. The other parts
normally should not require cleaning.
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