RE: i1Pro2 Problems
RE: i1Pro2 Problems
- Subject: RE: i1Pro2 Problems
- From: Ethan Hansen <email@hidden>
- Date: Thu, 20 Aug 2015 17:29:52 -0700
- Organization: Dry Creek Photo
> From: Martin Orpen
> > Finally, we also offer an inexpensive service with Maxwell (good for the
> life of the instrument) to periodically verify instruments using any color
> reference you like. You can trend the device and get email notifications
> for failures, etc. It doesn’t require the use of Maxwell for other things.
>
> Interesting. Never given this much thought — but now I’ve been bitten I
> think it’d be a good idea to periodically measure known references and
> compare the results.
Martin,
We regularly characterize all our instruments (albeit not an i1 amongst them) against standard references. You can use traceable standards such as Munsell tiles, but this is probably overkill for your needs. Start with a few representative color samples that will remain repeatable and not drift overly much with humidity or temperature. A sample swatch set from solid surface countertop manufacturers or non-glossy ceramic tiles work perfectly well.
Characterize each tile with all instruments on a regular basis. You are not interested in the absolute numbers but only in their relationship to each other. This allows finding instruments with outlier behavior as well as tracking color shifts over time. We track both calculated LAB values as well as spectral data for wavelengths are high enough to be out of the noise range. Excel works perfectly well for this task and lets you graph trends over time.
Were we starting from scratch, I'd probably take Steve up on his trending service.
Best,
Ethan Hansen
Dry Creek Photo
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