From the Main Window "Input" menu, select the Assay Characterization command, or push the 
button on the Main Window Toolbar.
From the Assay Main Window, push the Modify Primary Set button.
Modifying the Assay Primary Cutpoint Set
The cutpoints for the Primary cutpoint set may be changed using this window.
Access
From the Main Window "Input" menu, select the Assay Characterization command, or push the button on the Main Window Toolbar.
From the Assay Main Window, push the Modify Primary Set button.
Usage
This opens the dialog shown here.
This window displays the Default Assay Cutpoint Set. The Minimum Temperature for First Interval field is the starting temperature for cut point range, and the table below it lists succeeding temperature intervals with the number of pseudo-components in each interval.
The first temperature interval is between the value in the Minimum Temperature for First Interval field and the value in the first row of the Maximum Temperature for Interval column. Other temperature intervals are between values in two successive rows of the Maximum Temperature for Interval column. The number of pseudo-components in each interval are given in the second column of the table.
Modify the values (initially provided by PRO/II) for the primary cut point set as desired. Notice that temperature values in the table must be strictly increasing. To add more temperature intervals or delete any interval, use the Insert an Cut buttons, respectively. See Editing Tabular Data for more details on adding and deleting rows to a table.
The temperature unit for cut point intervals may be changed using the Unit-Of-Measure Selection Window which opens when the UOM button on the Toolbar is pushed.
Additional Information
Occasionally, there may be material on the TBP curve which lies below or above the minimum or maximum cut point temperature. When this occurs, PRO/II combines this material with the first or last pseudo-component and adjusts its properties accordingly. If it is important to represent this material accurately, the cut point interval should be extended as needed to generate an additional pseudo-component.