Re: Inter-Instrument agreement
Re: Inter-Instrument agreement
- Subject: Re: Inter-Instrument agreement
- From: email@hidden
- Date: Tue, 25 Feb 2014 20:38:55 +0000 (UTC)
While I am definitely not an official X-Rite spokesperson on this list I will re-iterate the most common reasons for inter-lab disagreement - some of which were covered, some of which you may only think have been covered. Before my list, Andrew is right of course there are stated tolerances in a well controlled metrology lab environment. X-Rite offers additional instruments like the eXact with even tighter specifications than the i1Pro if required.
1. Same device. Not just revision but particularly UV included/excluded hardware defined prior to the i1Pro2
2.Same software - Different software may actually change the values from the instrument
3. Backing - please don't say "self backing" please!
4.Cleanliness - The most common i1Pro "failure" in our repair facility as Steve noted is a dirty nose or a dirty or damaged cal tile.
5.Run Diagnostics - weeds out the most egregiously failing devices but is not a substitution for certification. The i1Pro2 also offers a more robust diagnostics capability.
6.Annual Certification - This is really the only way to absolutely know the instrument is behaving up to specification.
Cheers,
Ray Cheydleur
-Mike Stewart asks:
Hello All: Is there some "rule of thumb" regarding spectrophotometers
and inter-instrument agreement?
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