4 Installing 7890 GC Columns
To Install a Capillary Column in the GC/MSD Interface Using the Self-Tightening Column Nut
5977B Series MSD Operating Manual 87
11 Hand-tighten the nut. (See Figure 23.) Ensure the position of the column
does not change as you tighten the nut. Do not over tighten the nut.
12 Tighten the nut in the clockwise direction. Continue to tighten until you feel
the ferrule grip the column.
13 Check the GC oven to ensure that the column does not touch the oven walls.
14 Install the spring, tip seal, and knurled tip seal retainer on the GC/MSD
interface. (See“To Install the GC/MSD Interface Tip Seal” on page 93.) Do
not use the interface tip seal, spring, and knurled tip seal retainer 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 180.)
Figure 23. Installing a capillary column in the GC/MSD interface
Use care when placing the tip seal on the GC/MSD 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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