Re: Spectrophotometer Calibration?
Re: Spectrophotometer Calibration?
- Subject: Re: Spectrophotometer Calibration?
- From: Mike Eddington <email@hidden>
- Date: Fri, 26 Sep 2008 13:46:06 -0400
>About 2 years ago I purchased an i1Photo Pro spectrophotometer kit
for monitor calibration and creating profiles.
Enclosed was a "certificate of performance" noting specs and
performance results. At the bottom it says "Next Calibration Due
Date: April 2008"
Can someone tell me what this means? Does the spectrophotometer
itself need to be calibrated periodically? If so, where would I have
this done?>
The device actually needs calibration to its supplied tile upon every
use. What this is referring to is a factory re-calibration/re-
certification by the manufacturer (or third party offering such
service).
When purchased from X-rite, an instrument is certified for a period
typically of one year (or 18 months). After that expires, Xrite
recommends that the instrument be returned to the manufacturer for
recertification of its performance on an annual basis. They will guage
the performace, replace the calibration tiles, clean and repair the
instrument if necessary, ect, The instrument may or may not be
actually performing badly after one year...depends a lot on its care,
usage and environment. I've implemented a plan of verification of our
internal spectrophotometers (using Lab-Ref cards) rather than
automatic re-certification to 1) get more meaningful data on the
performance of the device, and 2) save the cost of automatically re-
certifying all our spectrophotometers, and only factory service those
whose performance falters. I would say its certainly possible for an
instrument to perform poorly after a period of one year, depending on
conditions, but I've got a 4-5 year old i1 that performs as well as
day one.
Michael Eddington
QA Manager/G7 Certified Expert
North American Color, Inc.
www.nac-mi.com
www.nac1to1.com
www.photo360.com
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