Agilent Technologies 7820A - To Check the Needle-to-Column Size on the COC Inlet

128 Maintaining Your GC
7 Maintaining the COC Inlet
To Check the Needle-to-Column Size on the COC Inlet
1 Gather the following:
• Insert (See “Consumables and Parts for the COC Inlet” on
page 120.)
• Syringe needle
2 Load the inlet maintenance method and wait for the GC to
become ready.
3 Check that the needle is the correct size for the desired
column id. If needed, replaced the needle with one of the
correct size. See “Consumables and Parts for the COC Inlet”
on page 120, and “To Replace a Needle in a Syringe” on
page 140 or “To Replace the Fused Silica Needle in a Syringe
for the COC Inlet” on page 141.
4 Identify the correct insert for the column size. (See
“Consumables and Parts for the COC Inlet” on page 120.) Use
the insert that is the same size as the syringe needle to verify
that the column you plan to use is the correct size.
5 Make a clean cut on the end of the column. (See “To Install a
Capillary Column with the COC Inlet” on page 125.)
6 Insert the column into one end of the insert.
WARNING
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.
WARNING
Wear safety glasses to protect your eyes from flying particles
while handling, cutting, or installing glass or fused silica capillary
columns. Use care in handling these columns to prevent puncture
wounds.