On Fri, 04 Sep 98 09:18:30 -0500, you wrote:
>What bothers me about the criteria in EN 50082-1 is the provision for the 
>manufacturer to define the permissible loss of performance.  This opens the 
>door
>for the manufacturer to simply relax the product specification to "pass" the 
>test.  Luckily, our EMC group generally inputs the EMC requirements into our 
>product specifications so that we have the opportunity to define reasonable 
>performance criteria.

I thought that was a bit strange at first, too.
However, the Test Report should describe the test conditions, test results, and
interpretation of the results.  The IEC1000-4 testing standards have a section
discussing the test report, and the subject is also discussed in BS EN
50082-1:1992 'Performance Criteria':
"A functional description and a definition of performance criteria, during or
as a consequence of the EMC testing, shall be provided by the manufacturer and
noted in the test report, based on the following criteria:"
          (performance criteria details follow)

In a similar manner, if a manufacturer claimed a product met a specific safety
specification, I would want documentation that supported the claim.  The same
is true for EMC immunity.

<snip>

--
Patrick Lawler
[email protected]

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