Routine Maintenance: Inlets
Maintaining a cool on-column inlet
Released: March 2004 6850 Series II GC User Information page 176 of 256
Table 35. Recommended Septa for the Cool On-Column Inlet
Warning Be careful! The oven and/or inlet may be hot enough to cause burns.
Caution Column flow is interrupted while changing septa; since columns may be
damaged at elevated temperatures without carrier flow, cool the oven to room
temperature before proceeding.
Materials needed:
• New septum—see Table 35 for part numbers
• Forceps (or tweezers)
• A thin wire (0.2-inch diameter) for removing septum from inlet
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.
Description Part no.
Solid septum for manual and automatic injection
(50 pk)
5181-1261
Through-hole septum for automatic injection (25 pk) 5181-1260
Solid septum, bleed and temperature optimized
(50 pk)
5182-0745
Duckbill septum for manual injection only (must use cooling
tower with the duckbill) (10 pk)
19245-40050
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