2 Installing 7890 GC Columns
48 5977B Series MSD Operating Manual
Procedure
1 Condition the column. (See “To Condition a Capillary Column” on page 41.)
2 Vent the MSD and open the analyzer chamber. (See “To Vent the MSD” on
page 113 and “To Open the Analyzer Chamber” on page 152.) Be sure you
can see the end of the GC/MS interface.
3 If installed, remove the isolation tip from the end of the GC/MS 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/MS 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.
9 Wipe the end with alcohol.
10 Adjust the column so it extends this specified distance from the end of the
transfer line.
For an XTR, SS, Inert, or CI Source Installation (See Figure 5 on
page 44.), the column extends about 1 mm.
Always wear clean gloves while handling any parts that go inside the GC or the
analyzer chambers.
The analyzer, GC/MS 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.
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