User`s guide

Operation
101
Figure 20 Trap Timing Popup
Standard Inject Time—If your ATD/TD is equipped with the
Internal Standard Addition accessory, a gaseous internal standard
can automatically be introduced onto every sample tube prior to
desorption. The standard will be added after the tube purge. The
Internal Standard (IS) valve is activated for the duration of the
Standard Injection time to allow the introduction of a volume of
standard onto the sample tube. After the end of the standard injection
time, the IS valve is closed and the ATD/TD will proceed with
desorption of the tube.
You will need to enter a standard injection time by selecting the
Preferences entry on the Tools tab and then selecting the Internal
Standard button.
This calls up a dialog box that allows you to enter the Inject Time as
well as the Loop Load and Loop Equil for the internal standard.
Enter an injection time between 0.1 and 9.9 minutes.