I would say take all these settings with a huge grain of sand. If we just ignore the the variability between individual panels over the life cycle and sizes. You also have the expertise of the calibrater, the quality of the tools, the environment etc, come in to play.
Those of us doing things at home typically are using some variation of x-write i1 display colorimeter. The i1 display is a colorimeter with considerable variation from unit to unit. Colorimeters are filter based and subject to deterioration with age. Further they come with different levels of offsets provided by the manufacturer or calibration software vendors.
Now a pro typically has a spectrometer as well as a colorimeter. The pro uses the spectrometer, a reference level device, to measure red, green, blue and white on the individual display first then measures again with colorimeter these measurements are entered in the software and creates offsets that ensure the colorimter as accurate. The colorimeter is fast, the spectro is accurate. Used together in this way gives the colorimter the accuracy of the spectro. Reference grade spectros are very expensive so are well beyond all but the most serious and well heeled of enthusiast home calibrators.
Last edited by gtgray; 07-08-2019 at 12:09 PM.