Varian 4000 GC, Hardware Operation Manual

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2. Swap sources by loosening the three screws on the magnet structure, pulling
out existing source while leaving the ceramic spacers in place and placing
the source on a lint-free surface.
3. Take the screws from the source that was removed, and place them in the
source being installed.
4. Position the replacement source with the three screws aligned into the
ceramic spacers. If switching to external mode, be sure the centering ring is
in place. Retighten the three screws. The source you removed should be
stored in the box provided.
5. Go to “Reinstalling the Source/Ion Trap Assembly” on page 41.
Changing the Transfer line Position from External to
Internal
1. To move the 4000 MS away from the GC, go to page 37.
2. Unplug the transfer line heater cable from connector J37 on the bulkhead.
3. Be sure the transfer line is cool; then remove the transfer line assembly
(Including the weldment) from the manifold by loosening the four captive
screws holding it in place. Be sure not to lose the sealing O-ring.
Internal Measuring Tool
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