I am trying to troubleshoot an issue where my Klein K80 measures wildly inaccurate red colours when probe matching is enabled. I am measuring an LG C9 TV.
I am still a learner when it comes to calibration and the maths behind it, but I suspect that the negative Z value of the raw K80 measurement is causing the issue.
Attached are screenshots of the LG C9 native red primary from the K80 (with the blank 0 profile selected) and a CR-250 spectro. Ignore the different code values for red; they were from different patch runs.
I didn't catch the issue at first until I turned on probe matching. The red primary becomes wildly incorrect when matching is enabled.
These negative Z values occur in both Colourspace and Chromasurf. Also, they occur across various profiles (including the blank profile with the identity matrix) in both software programs.
Is this perhaps an issue with my measurement methodology?
Here are the settings I used for both the CR250 and the K80:
-Contact measurement distance
-Stabilization of 3 seconds
-Extra Delay of .5 seconds
-Resolve Patch generator
-25FPS output from Resolve
Or maybe this is a hardware issue with the K80?
Any help would be appreciated.
 CR250 Red Primary LG C9
|  K80 Red Primary LG C9
|  |
Klein K80