Re: Difference in instruments measurements
Re: Difference in instruments measurements
- Subject: Re: Difference in instruments measurements
- From: Roger Breton <email@hidden>
- Date: Wed, 04 May 2005 22:26:57 -0400
Dear Ray,
> They should agree much closer than that.
That's what I tend to think. But I'm open to other's opinion too.
> I would suggest you find
> someone with a set of ceramic tile standards.
Yes, that's an excellent idea.
> These cost many hundreds of dollars.
Don't I know :(
> You could also order a "Lab-Ref" from the
> "www.idealliance.org" web site.
I suppose that's the next best thing. But I'm concerned about their long
term stability.
> I think these only run a little more
> than $100 U.S.
Actually, depending on whether one is member or not, the price runs from
$200 to $300. I have and use their T-Ref but I am shying from their Lab-Ref.
> You should have third party standards that are not from
> the company that make your instruments.
Right. But I am concerned that it's going to come down to a calibration
tug-of-war between intruments manufacturer's calibration practice. Also, I
have to be concerned about how do I measure those BCRA tiles on an XY strip
reader like an ICcolor or a strip reader like a DTP41.
> These standard should be
> traceable to international standards.
Yes. And that's provided they come with 0/45 measurements. And I need more
than just a white tile because white is not going to catch all wavelengths
errors, I once found out. So, it's an expensive proposition.
> Then you can check your
> instruments and decide which instrument needs recalibrating at the factory.
Right. If life was so easy, as they say in the commercial...
> Ray
Regards,
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden