6 General Maintenance
To Remove the E I HES
5977C GC/MSD Operating Manual 151
To Remove the EI HES
Materials needed
• Gloves, clean, lint-free
• Large (8650-0030)
• Small (8650-0029)
• Tweezers (8710-2460)
Procedure
1 Vent the MSD. (See “To Vent the MSD” on page 109.)
2 Open the analyzer chamber. (See “To Open the Analyzer Chamber” on
page 149.)
3 Remove the two large thumbscrews that hold the ion source in place. (See
Figure 46 on page 152.)
4 Disconnect the wires from the EI HES. (See Figure 46 on page 152.) Do not
bend the wires any more than necessary. (See “To Connect/Disconnect
Wiring to the EI HES” on page 153.)
The analyzers, GC/MSD 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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