Routine Maintenance: Inlets
Maintaining a split/splitless inlet
Released: March 2004 6850 Series II GC User Information page 123 of 256
3. Remove the septum retainer nut, using a wrench if the nut is hot or sticks.
Remove the old septum. If the septum sticks, use a sharp tool to remove it.
Take care to avoid gouging or scratching the metal.
4. If pieces of the septum stick, use a small piece of rolled-up steel wool and
forceps or tweezers to scrub the residue from the retainer nut and septum
holder. Use compressed air or nitrogen to blow away the debris.
5. Use forceps to insert a new septum. Press it into the fitting firmly.
6. Replace the septum retainer nut, tightening it until the C-ring is about
1 mm above the nut. Avoid overtightening.
7. Restore normal operating conditions.
Septum retaining nut
Septum
C-ring
1 mm gap