INFICON Explorer Portable Gas Chromatograph - Manual (Page 192)

Method Development
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9. Use the arrow keys to enter the peak number of the peak you want to store.
Press Enter Menu.
10. Use the arrow keys to enter the compound name. Press Enter Menu.
This will be the first concentration stored for this compound. This box will
allow you to store the compound at multiple concentrations.
11. Press Enter Menu to confirm. Press Exit to close the box.
12. Use the arrow keys to enter the concentration of the compound. Press Enter
Menu to confirm.
13. Use the arrow keys to enter the size of the window.
The Window size is the deviation in retention time for which Explorer will
compensate. For example, if the window is set at 10%, a compound with a
retention time of 100 s will still be identified if it elutes at anytime between 90
and 110 seconds.
14. Select the desired curve fit option.
Line segments will join the calibration points you enter and use this as the
calibration curve. Linear will use linear regression to find the best line through
the calibration points you store. Quadratic will determine the best quadratic
function to fit your stored concentration points. Cubic will use a third order
function to fit your data.
15. Press Enter Menu and then press Exit to close the box.
16. Press ALARM and use the arrow keys to enter an alarm concentration.
If the detected concentration exceeds this alarm level, an alarm will be
generated.
17. Press CALCMPD.
A check will appear beside the compound name to indicate the compound is
selected for calibration.
18. Review the information in the calibration box to ensure all the information has
been entered correctly.