Hi Axel, to your problem with "certification" on Eizo CG275 I can say thats not so simple to complete some technical tests in colorimetry or color management without doubt about the procedure. It requires more experience than it looks at first glance. My comments to your report: 1.

EIZO CG275W LCD.

As you certainly already know, this display is configured

with a built-in calibration sensor which is able to correlate an external sensor, in my case it's a basICColor DISCUS.

Your mention of this feature looks suspicious because it is not a good idea to use this correlation to compare the results in two different applications. DISCUS is supported in EIZO ColorNavigator and internal colorimeter EIZO-swing is supported in UGRA-Tool (as I can read in documentation) so there is no reason to use this undesirable correlation routine in test - or is there? 2.

despite the fact it doesn't pass the Ugra Display Analysis Certification Tool for the white point while it is good in the final internal Eizo's test (a script made in Photoshop).

Another suspicious thing is the information about Photoshop-script while this is used only for CMYK-validation by ColorNavigator. But It¹s not possible to make some control of White-Point coordinates from this type of validation... I dont understand why you talk about it in this case. To check the monitor, you must always give priority to validation in native mode first - I¹m just talking about RGB-mode in this case. 3.

whitepoint 5800 K - Gamma L* according to the ECI RGB V2.

But unfortunately, I always obtain the same extremely bad and very weird result in term of DeltaE whitepoint: 12.1 dE00 or 12.3 dE76Š

I have no idea if this combination of CCT 5800K + L*curve is recommended for starting in UDACT-Test but many serious applications talks about 5000K+Gamma2.2 in first line. Note that value of dE=12 correspond with difference between White-points of 5000K / 5800K very well. Usualy we can get values dE<1.0 for White-point validation with DISCUS on EIZO CG monitors. 4.

I am totally confused about this results, any suggestions?

If we talking about measurements in 2 different apps you should know that EIZO ColorNavigator use special compensation tables for colorimeters by default /"Color management (Recommended)"/ and It is possible to switch this compensation Off in Preferences>Measurement device. I would like to hear some news from you if the results change! Radim