70 Maintaining Your GC
5 Maintaining the Purged Packed Inlet
To Clean the Septum Seat in the Purged Packed Inlet
1 Gather the following:
• Replacement septum (See “Consumables and Parts for the
Purged Packed Inlet” on page 60.)
• Septum nut wrench
• 0- or 00-grade steel wool (optional)
• Tweezers
• Compressed, filtered, dry air or nitrogen
• Ultrasonic cleaning bath
• Lint-free gloves
2 Load the inlet maintenance method and wait for the GC to
become ready.
3 Remove the septum retainer nut or Merlin cap.
4 Loosen the top insert weldment and remove.
5 Use tweezers to remove the septum or Merlin Microseal from
the top insert weldment. Do not gouge or scratch the interior
of the septum head.
6 Scrub the residue from the top insert weldment and septum
nut with a small piece of rolled-up steel wool and tweezers.
Ultrasonically clean the retainer nut and top insert
weldment.
7 Use compressed air or nitrogen to blow away the pieces of
steel wool and septum.
8 Wearing gloves, inspect the O-ring and replace, if necessary.
(See “To Change the O-Ring on the Purged Packed Inlet” on
page 74.)
9 Install the top insert weldment and hand-tighten firmly.
WARNING
Be careful! The oven and/or inlet may be hot enough to cause
burns. If the inlet is hot, wear heat-resistant gloves to protect your
hands.
CAUTION
Wear clean, lint-free gloves to prevent contamination of parts with
dirt and skin oils.
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