4 Installing 7890 GC Columns
To Calibrate Column Flow Linear Velocity in a 7890 GC
5977B Series MSD Operating Manual 95
To Calibrate Column Flow Linear Velocity in a
7890 GC
The steps listed below apply to 7890 and 6890 series GCs only. Capillary
columns must be calibrated prior to use with the MSD.
Procedure
1 Set Data Acquisition for splitless manual injection, and set up a real time plot
to monitor m/z 28.
2 Press [Prep Run] on the GC keypad.
3 Inject 1 µL of air into the GC inlet and press [Start Run].
4 Wait until a peak elutes at m/z 28. Note the retention time.
5 In the Instrument Control view, select GC Parameters from the Instrument
menu.
6 Select the Configuration tab and then select the Columns tab.
7 Select your installed column from the table.
8 Click Calibrate to display the Calibrate Column dialog.
9 Click Calc Length in the If unretained peak holdup time is known section to
display the Calculate Column Length dialog. (See Figure 25.)
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