BUCHI NIRCal - Manual (Page 170)

NIRCal 5.5 Software Manual
170 NIRCal 5.5 Manual, Version A
3.18.4 Calibration Score Limits
Description Allowed minimum and maximum score values of the calibration.
Use Score outlier detection in the validation set, especially in Cluster calibration.
Method PCR / PLS / Cluster (CLU) / SIMCA
Matrices ID 45
Tip Only scores outliers according the secondary PCs are important.
Details
Related Topic Scores
The allowed score limits for the validation: 1.05 x min. and max. scores of the C-set spectra.
The default blow up limit of 1.05 can be edited by the user.
3.18.5 Cluster per Property
Description Number of cluster -connected radii area- per property.
Use Additional information for property separation.
Method Cluster (CLU) / SIMCA
Matrices ID 52
Tip The number of cluster per property is always 1 in a good calibration.
Details Each spectra of the same property should be together and build one
connected cluster.
Related Topic Property Box Radii , Property Box Center
A good calibration has only one cluster for each property
3.18.6 Consistency
Description Consistency describes the relation between the standard errors of the
calibration and validation sets.
Use Selecting the secondary PCs for a robust calibration.
Method PCR / PLS (only with VS mode)
Matrices ID 33
Tip SEP- and SEE-value should be small and similar for a stable calibration.
With an optimal number of PCs the consistency shows values around 100
(80-110).
Details Visible in the Overview, in the View: Secondary PCs Selection and under
Graphics.
Formula
Related Topic C-Set SEE , V-Set SEE (SEP)