Frequency Test - Agilent Technologies 7820A Service Manual

Agilent 7820 GC Service
87

The end of the column does not protrude from the top of
the makeup gas adapter. For most columns (outer
diameter > 0.20 mm), insert the column as far as it will go
into the gigabore liner. If using a microbore column (id <
0.20 mm) that passes completely through the liner,
position the column so that the total length from the back
of the capillary nut to the end of the column is about 69 to
71 mm.

Frequency test

Perform this test to make sure that the base frequency for the
uECD during a blank run indicates a relatively contaminant-free
system. See also the related troubleshooting manual topic on
uECD Life Cycle.