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4
Installing 7890 GC Columns
To Install a Capillary Column in the GC/MS Interface Using a Standard Column Nut
88
7000/7010 Series TQ GC/MS Operating Manual
10
Adjust the column so it extends this specified distance from the end of the
transfer line. (See
For an EI XTR or CI Source Installation
on page 83.), the
column extends about 1 to 2 mm.
For an EI HES Installation
on page 83.), the column extends
about 4 to 5 mm.
Use the flashlight and magnifying loupe if necessary to see the end of the
column inside the analyzer chamber. Do not use your finger to feel for the
column end.
11
Tighten the nut 1/4 to 1/2 turn. Ensure the position of the column does not
change as you tighten the nut. Do not over tighten the nut.
12
Check the GC oven to be sure that the column does not touch the oven walls.
13
Check the nut’s tightness after one or two heat cycles; retighten as
appropriate.
14
Install the tip seal, spring, and knurled tip seal retainer on the GC/MS
interface. Align, gently slide, and screw the knurled tip seal retainer into the tip
seal holder. (See
and
15
Gently
check the alignment of the ion source and the interface tip seal. When
the ion source is aligned correctly, the front analyzer chamber can be closed
all the way with no resistance except the spring tension from the interface tip
seal.
16
You can align the ion source and interface tip seal by wiggling the side plate
on its hinge. If the door still will not close, contact your Agilent Technologies
service representative.
17
Close the front analyzer chamber. (See
CAUTION
Use care when placing the tip seal on the end of the GC/MS interface to avoid
damaging the column.
CAUTION
Forcing the analyzer door closed if these parts are misaligned will damage the
tip seal or the interface or the ion source, or will keep the side plate from
sealing.