Installing 7890 GC Columns 2
5977B Series MSD Operating Manual 49
For an EI HES Installation (See Figure 6 on page 44.), 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 “To Install the
Interface Tip Seal” on page 50.) 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 Figure 56 on page 175.)
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” on
page 196.)
Use care when placing the isolation tip on the end of the GC/MS interface to avoid
damaging the column.
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.
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