7CI Maintenance
To Remove the C I Sou rce
5977C GC/MSD Operating Manual 217
To Remove the CI Source
Materials needed
• Gloves, clean, lint-free
• Large (8650-0030)
• Small (8650-0029)
• Tweezers (8710-2460)
Procedure
The video shows wiring connections for the non-HES model MSD.
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 Use tweezers to disconnect the wires from the CI source. Do not bend the
wires any more than necessary. (See“To Connect/Disconnect non-HES
Model Wiring from the CI Source” on page 218 or “To Connect/Disconnect
EI HES Model Wiring to the CI Source” on page 219.)
Trace the wires for the ion source heater and temperature sensor to the ceramic
source board, and disconnect them there. (See“To Connect/Disconnect EI HES
Model Wiring to the CI Source” on page 219.)
4 Remove the two large thumbscrews that hold the ion source in place.
5 Pull the ion source out of the source radiator, and place it in its storage container.
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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