BUCHI NIRCal - Manual (Page 126)

NIRCal 5.5 Software Manual
126 NIRCal 5.5 Manual, Version A
Property Box Radii:
Enlarge the Property Box Radii window in the Overview (1st column, 3rd window). Property Box
Radii represents the scattering of the scores

small values (normally below 0.1) mean repeatable scores,

big values mean bad repeatability.
The scores of PC 4 are not repeatable, PC 4 can not be used as calibration PC.
Additional tool: