8 Maintaining the COC Inlet
To Install an Insert on the COC Inlet
130 Maintaining Your GC
To Install an Insert on the COC Inlet
1 Gather the following:
• Lint-free gloves
• Replacement insert, see “Consumables and Parts for the Cool On-Column Inlet” on
page 120.
2 Place GC in maintenance mode: Maintenance > Instrument > Perform Maintenance >
Maintenance Mode > Start Maintenance. Wait for the GC to become ready.
Be careful! The oven and/or inlet may be hot enough to cause burns. If either is hot, wear
heat-resistant gloves to protect your hands.
Wear clean, lint-free gloves to prevent contamination of parts with dirt and skin oils.
3 Remove the column from the inlet.
4 Locate the septum nut or cooling tower assembly at the top of the inlet and remove it. If
the septum remains in the septum nut, do not remove it unless you want to change it. If
necessary, replace the existing septum or duckbill with a new one. See “To Change a
Septum on the COC Inlet” on page 128.
5 Remove the spring from the inlet with an extraction wire (or tweezers) and set it aside. Be
careful not to lose or damage it because you will use the spring to keep the new insert in
position.
6 Remove the existing insert from the inlet by gently pushing it out from below with a wire or
piece of column. Store the insert for possible later use.
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