Originally Posted by Dominic Chan
I find it strange that they’ve now added a note saying
Note: Re-certification services offered for most C6 colorimeters. Refurbished C6 colorimeters do not qualify for re-certifcation services.
There a lot of stuff very interesting happening.
Look the marketing email all we receive for the C6-Refurbish program:
It's clearly say that the Re-furbished meters are getting NIST.
If you look also the actual page where someone had to visit to place order for C6 Re-refurbished meter, it was saying:
It says not only that the meter is calibrated but also changed new parts (when required, what parts? you have to separate the mixing chamber from the meter sensor to open the meter, so filters are exposed), the original old page is there: https://web.archive.org/web/20161102...lorimeter.html
But when someone got a C6-Refurbished meter and he said tha it was saying 2012, Tyler replied that the re-furbished meters are just tested, not getting any NIST: https://www.avsforum.com/forum/139-d...l#post56791748
This Tyler post is the exact opposite of email/store info.
So why I spend my money to get a C6 calibrated?
Because I was fool trusting all that inaccurate marketing and I payed 595$ + 290$ for clearance to import to Europe (yes, SpectraCAL did a mistake and send via FedEX, while we have talked to ship it only with USPS, while they forgot to include also the tripod holder for i1PRO1 I had ordered also...minor issue).
.....So I bought the C6 while I had i1Display PRO Retail already, and I was so excited that I was about to receive a calibrated meter, but now we found out that the meter is not calibrated from using another spectro, X-Rite performs specific sensor characterization process which can be only performed during the production of the meter with a scanning monochromator or integrated sphere, process only possible to X-Rite factory.
is official US government patent (public available with google search of X-Rite holds which describe how the meter can be calibrated (SPMref means reference 1nm spectro):
''The spectral sensitivities of the channels of the CMD are formed by the ratio, at each wavelength, of the power as measured with the SPMref to the output of the CMD at the same wavelength. This could be accomplished, for example, by measuring the output of a scanning monochrometer with both the SPMref and the CMD. Another embodiment is schematically shown in FIG. 2. By means of an adjustable light source Q, which can for example be formed by an integrating sphere equipped with corresponding illuminants and as applicable color filters, light of different colors (different spectral bands) is generated sequentially and gauged by both the color measuring device CMD to be calibrated and spectrally by a high-precision reference spectrophotometer SPMref.
I have highlighted with hold letters the 2 available calibration methods which can be performed, 1) using monochromator or 2) using integrating sphere.
Only X-Rite to their factory calibrate the meter, and they not offer also any re-calibration service if you asked them.
All i1DisplayPRO's, OEM/Retail/Custom OEM, all are exact the same from the hardware side, and firmware also (when they have the same revision firmware).
You can arrange with X-Rite to enter to custom OEM program where they can ship to you large volume with custom case/colors even outer box with any logo you like, custom meter sticker, just with a more expensive price, and provide what unlocking code you like, to limit the meter to work for your software only.
The calibration procedure X-Rite apply to the factory, its using one of the 2 above methods, they are not using any Spectro @ X-Rite to calibrate each meter, they can use a Minolta (1nm) spectro only when the want to create a specific type of display EDR file.
The X-Rite manufacturing specs are these: http://www.vpixx.com/datasheets/ds_i1display_pro.pdf
These specs are not available to X-Rite webpage because they are the lab specs not possible to reproduce to any other facility except X-Rite during the manufacturing process.
This means that final product can have higher tolerances, but SpectraCAL certify the meters that they measure down to +-0.001 xy and +-2% Y. which is a lot below than the actual instrument specs from the factory.
The same time, the most advanced colorimeter in the market, Minolta CA-410 which cost about 30-40K$, it has +-0.002 xy deviation: https://www.konicaminolta.com/instru...atalog_eng.pdf
Klein K-10aA (7$K) has +-0.002 xy (White) and +-0.004 xy (RGB): https://static1.squarespace.com/stat...+SpecSheet.pdf
Colorimetry Research CR-100 (5.5K$) has +-0.0015 xy: https://www.colorimetryresearch.com/products/cr-100
And all these 3 reference meters which are coming calibrated with certification of performance are not tracking so tight as a C6 meter which has the same calibration as a normal i1Display PRO and while they are shipped from the X-Rite factory without any certification of performace, not only a new C6 but even used C6's (refurbished) get NIST +-0.001 xy and below certification according to SpectraCAL.