6 General Maintenance
154 5977B Series MSD Operating Manual
To Remove the EI HES
Materials needed
• Gloves, clean, lint-free (Large 8650-0030) (Small 8650-0029)
• Tweezers (8710-2460)
Procedure
1 Vent the MS. (See “To Vent the MSD” on page 113.)
2 Open the analyzer chamber. (See “To Open the Analyzer Chamber” on
page 152.)
3 Remove the two large thumbscrews that hold the ion source in place. (See
Figure 47 on page 155.)
4 Disconnect the wires from the EI HES. (See Figure 47 on page 155.) Do not
bend the wires any more than necessary. (See “To Connect/Disconnect
Wiring to the EI HES” on page 156.)
The analyzers, GC/MS interface, and other components in the analyzer chamber
operate at very high temperatures. Do not touch any part until you are sure it is cool.
Always wear clean gloves to prevent contamination when working in the analyzer
chamber.
Make sure you use an antistatic wrist strap and take other antistatic precautions
before touching analyzer components.
When disconnecting leads, pull on the connectors, not on the wires.
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