Routine Maintenance: Inlets
Maintaining a purged packed inlet
Released: March 2004 6850 Series II GC User Information page 141 of 256
1. Load the SERVICE method or reset the inlet and oven temperatures to
OFF or turn the main power switch off. Let the heated zones cool to room
temperature. Also, make sure that:
• If you have entered parameters that you do not want to lose, store
them as a method
• If the detector is on, turn it off
2. Turn the inlet pressure off at the source.
3. If the inlet is hot, wear gloves to protect your hands from burns. Remove
the septum retainer nut, using the wrench to loosen or remove the nut if it
is hot or sticks. Remove the old septum.
If the septum sticks, use a sharp-tipped tool to remove it. Take care not to
gouge the metal around the septum and make sure you remove all pieces
of the old septum.
4. If pieces of the septum are sticking, grasp a small piece of steel wool with
the forceps or tweezers and scrub the residue from the retainer nut and
septum holder. Use compressed air or nitrogen to blow away the pieces of
steel wool and septum.
5. Use the forceps to insert a new septum. Press it into the fitting firmly.
Septum retainer nut
Septum
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