Originally Posted by TomHuffman
The absolute error for a D3 PRO is theoretically zero, because it has been corrected. In practice it will be slightly more than that.
Hello Tom, thanks for your reply.
OK, so I understand now that the absolute error of a PRO is almost zero, and the absolute error for a standard D3 is 0.004 to 0.008.
Based on this I feel there is an unrealised potential which I would like to explain here. I also wrote a private email to you about that, but I think this subject could/should be of interest to other Chromapure/D3 users. That is why I would like to explain it in this forum.
My understanding is that the absolute error of a standard D3 is 0.004-0.008, so on average 0.006. For an individual meter, there is then a variation of -0.002 to +0.002 (approximately, based on your last data).
That means it should be possible to make a correction without making calibrations for the D3 standard, and the correction is based on the average errorof your PRO calibrations , build this in the program or license file, and obtain better calibration results
At the moment, you offer a D3 with standard factory correction, and this is fine for budget oriented users, or those who make their own corrections with a spectrometer.
And you offer a fully calibrated PRO meter for an optional price, which gives maximum accuracy for different panel types, short of calibrating with a spectro on a specific panel.
And the other option I would like to propose, is that you offer an option of a D3 with an average correction for each panel mode built in (so one average per panel type). Obviously the option price would have to reflect the calibration value gained, and the difference in time effort compared to a full calibration. Also obviously, there is no need to disclose what the average correction is, and the correction should be hidden in the program or license file. But in order that the user feels to get a real value, you would have to publish some statistical data of the benefit gained in dE.
OK, this was a long post. I also hope to invite some reactions form other users, with the aim of having an increased Chromapure/D3 benefit.Edited by turboman123 - 11/13/12 at 2:32am