
2
Installing 7890/7820/6890/6850 GC Columns
5975/5977 Series MSD Operating Manual
43
10
Adjust the column so it extends this specified distance from the end of the
transfer line.
For an XTR, SS, or Inert Source Installation
column extends about 1 mm.
For an EI HES Installation
on page 38.), the column extends 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
Hand-tighten the nut. 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
Tighten the nut 1/4 to 1/2 turn.
14
Check the nut’s tightness after one or two heat cycles; tighten additionally as
appropriate.
15
Install the tip seal and spring on the GC/MS interface. (See
on page 44.) Do not use a tip seal or spring with an EI SS
or Inert source. The interface socket on these sources does not allow the tip
seal installation to fit. (See
16
Gently
check the alignment of the ion source and the interface tip seal.
When the ion source is aligned correctly, the analyzer chamber can be
closed all the way with no resistance except the spring tension from the
interface tip seal.
17
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.
18
Close the analyzer chamber door. (See
“To Close the Analyzer Chamber”
CAUTION
Use care when placing the isolation tip 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 sideplate from sealing.