I'll explain what the third tab is. When I first compared the colori with the spectro on tab 1, you can see I saved the spectro readings. On tab 2, where I verify the profile created for the colorimeter, I took another series of spectro readings.
I compare those 2 series of spectro readings on tab 3. Just to verify that the i1 pro II has no repeatibility issues. The i1 pro 2 is accurate to within 0.002 as you can see (green y being the worst offender with 0.0018 deviation). So when verifying a profile for a colorimeter, it is possible to see it deviate from the spectro with as much as 0.002. Of course the colorimeter has its own tolerances, so in a kind of worst case scenario, it could add another 0.002 making that a profiled colorimeter can still have a fault of 0.004.
Now, yesterday, I intended to verify whether a profile remains accurate when changing WB picture modes. Unfortunately, when reverifying the profile (so essentially what I did on tab 2 as I started reverifying the same picture mode where I left off the day before) it deviated with as much as 0.005 from the spectro.
This can have 3 reasons as far as I can tell:
1) When I first created the profile, I had to angle the meters a bit to the right to make them read the centre of the screen. When reverifying, I moved the sofa so that the meters could be placed perpendicular to the centre of the screen.
2) Although the spectro read the same values (within 0.002 accuracy) the colorimeter reading were of by as much as 0.005. When I created the profile, it was night, but the day after it was a bright sunny day. So perhaps the colorimeter is much more susceptible to this change in brightness.
Perhaps someone can dispute of agree with this claim?
3) Both meters coincidentally had a worst case repeatibility issue
No, the base plate is the correct one. There is another accessoire that is paired with a specific i1 pro II. I can't recall its name in English at the moment (I'll dig through my mails when I send it in)
My gear: Panasonic TH-42PF11EK pro plasma display + TX-P55VT60E -- Iscan Duo video processor -- i1 display 3 colorimeter -- i1 pro 2 spectrometer