44 Maintaining Your GC
4 Maintaining the Split/Splitless Inlet
To Change the Septum on the Split/Splitless Inlet
1 Gather the following:
• Replacement septum. (See “Consumables and Parts for
the Split/Splitless Inlet” on page 36.)
• 0- or 00-grade steel wool (optional)
• Tweezers
2 Load the inlet maintenance method and wait for the GC to
become ready.
3 Remove the septum retainer nut or Merlin cap.
4 Use tweezers to remove the septum or Merlin Microseal from
the retainer nut. Do not gouge or scratch the interior of the
septum head.
5 Firmly press the new septum or Merlin Microseal into the
fitting. The metal parts side of the Merlin Microseal should
face down (toward the oven).
6 Install the septum retainer nut or Merlin cap and
finger-tighten. Tighten the septum retainer nut until the
C-ring is about 1 mm above the nut.
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.
SeptumSeptum retainer
nut