In message 
<of45cafe62.ef42ec34-on8025711d.0041937a-8025711d.00426...@elekta.com>, 
dated Wed, 22 Feb 2006, [email protected] writes
>If we make a product, test it, certify it, and sell this in the normal 
>way, how long can we carry on selling this product (assuming that there 
>are no design changes, but changes due to obsolescent parts or 'more 
>modern' parts) relying on the original test results and certificate to 
>provide evidence of Compliance?

Compliance with what? Safety and EMC requirements, and many others, are 
regularly (many say too regularly) updated, and in Europe and elsewhere 
the superseded standards can be relied on only for a transition period, 
often three years. Beyond that, the product has to be reassessed to the 
new standard.

Be careful about 'more modern', especially for EMC. Newer products often 
have shorter response times and quite different 'EMC signatures'. 
Fitting such a device may well invalidate EMC compliance to the standard 
that was originally OK.
-- 
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
2006 is YMMVI- Your mileage may vary immoderately.

John Woodgate

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