Agilent Technologies Agilent 7890 Series Maintenance Manual page 73

Maintaining Your GC
Ferrule
Column nut
Septum
Score the column using a glass scribing tool. The score
6
must be square to ensure a clean break.
7 Break off the column end by supporting it against the
column cutter opposite the scribe. Inspect the end with a
magnifying loupe to make certain there are no burrs or
jagged edges.
8 Wipe the column walls with a tissue dampened with
isopropanol to remove fingerprints and dust.
Position the column so it extends 1 to 2 mm above the
9
end of the ferrule. Slide the septum up the column to
hold the column nut at this fixed position.
Maintaining the Purged Packed Inlet
Bad
Good
6
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