14
With this option, the Cary will prompt you to perform a 100%TBaseline first, followed
by a 0%TBaseline when you perform a baseline collection.
Note
If you select this option the Baseline button in the main window will not be enabled
until you have retrieved a Std Ref file. Click this button to browse for and select a
Std Ref file. This file must be in the
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format.
Known Mirror
Select this option when you are using a VW Specular Reflectance Accessory (SRA) with
a small sample or a sample of low reflectance. Refer to your SRA manual for more
information.
Known Mirror Correction
The correction equation is as follows:
S
−
0%TBaseline
100%TBaseline
−
0%TBaseline
Known
mirror
corrected
where
Known
mirror
corrected
=
known
mirror
−
0%TBaseline
100%TBaseline
−
0%TBaseline
Tip
If baseline correction is activated, the type of correction that the Cary will
apply will appear in the in red.
However, sometimes you may notice that the text has turned to gray and is in
italics. This indicates that the Cary is currently idling outside the abscissa
range of the baseline file, but that the current method Start/Stop parameters
do not exceed the abscissa range of the baseline.
Retrieve Baseline File
This button displays the Windows Open dialog box where you can select a stored
baseline file. The trace(s) in this file will be used for the selected baseline correction.
The name of the selected file appears next to the Baseline button.
Tip
If you want to use the baseline again with other samples, save the method using
File | Save Method As. Then, when you re-open the method, the baseline will also
open and be ready to use. It is preferable to save the baseline with the method,
rather than a baseline file, as that way you can be sure that all your collection
parameters are exactly the same for the new Scan runs. However, Good Laboratory
Practice recommends that you collect a new baseline for each laboratory session.
View Baseline File
This displays the traces in the selected baseline file in the Graphics area.
