46 Installation and Operation Guide
4 Operation
Changing Columns Without Venting the MSD
For systems that use an MSD attached to the splitter, one added advantage is
the GC column can be changed without venting the MSD. When the column is
disconnected from the splitter plate, the makeup gas purges air out of the
fitting, preventing air from reaching the MSD.
To change columns with the splitter, the recommended steps are:
1 Cool down the inlet to which the column to be removed is connected.
2 Disconnect the column from the splitter plate.
3 Immediately install a plug in the plate where the column was connected.
4 Change column in the inlet and turn on carrier gas to purge air from the
column.
5 Preswage metal ferrule on the outlet end of the column.
6 Remove plug from the connector.
7 Connect the new column to the splitter.
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