4 Installing 7890 GC Columns
To Install a Capillary Column in the GC/MSD Interface Using a Standard Column Nut
90 5977B Series MSD Operating Manual
Procedure
1 Condition the column. (See“To Condition a Capillary Column” on page 83.)
2 Vent the MSD and open the analyzer chamber. (See “To Vent the MSD” on
page 136 and“To Open the Analyzer Chamber” on page 176.) Be sure you
can see the end of the GC/MSD interface.
3 If installed, remove the knurled tip seal retainer, interface tip seal, and spring
from the end of the GC/MSD interface.
4 Slide an interface nut and conditioned ferrule onto the free end of the GC
column. The tapered end of the ferrule must point towards the nut.
5 Slide the column into the GC/MSD interface.
6 Use the column cutter to score the column 2 cm from the end.
7 While holding the column against the column cutter with your thumb, break
the column against the edge of the column cutter.
8 Inspect the end for jagged edges or burrs. If the break is not clean and even,
repeat steps 6 and 7.
Always wear clean gloves while handling any parts that go inside the GC or the
analyzer chambers.
The analyzer, GC/MSD interface, and other components in the analyzer
chamber operate at very high temperatures. Do not touch any part until you
are sure it is cool.
Dangerous voltages exist inside the analyzer chamber, which can result in
fatal injury. Do not open the analyzer chamber door for any reason. If access is
ever required, trained service personnel must first disconnect the instrument
from the building power source.
The GC operates under high temperatures. Do not touch any GC parts unless
you are certain they are cool.
Do not break the column off inside the vacuum manifold. Pieces of column
could fall or be pulled into the turbo pump and damage it.
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