Brian,
Most of the immunity standards allow the manufacture to state some lesser
performance criteria when the product doesn't meet the requirements. In most
cases a test lab can't dictate product performance and specifications. Only
note the results in a test report.
IMO,
One way of addressing this: make it clear to the vendor, that "You" as the
customer of the peripheral equipment do not accept that lesser performance.
Let's say you're buying an ohm meter. During some immunity test it gives bad
readings which are critical to your products performance. Seems to me, that
this product doesn't meet your requirements. If it should be reading +/-1%
and it's reading +/-10%. I would go buy a different meter.
The EU immunity standards mandate a level of quality. If a company chooses to
re-write the performance criteria, then they don't value quality.
At least that's how I've pitched this before with success.
Regards
Dave Spencer
EMC Engineer
Xerox Corp.
________________________________
From: [email protected] [mailto:[email protected]] On Behalf Of Kunde,
Brian
Sent: Wednesday, November 05, 2008 12:59 PM
To: [email protected]
Subject: Deviation of Performance Criteria
Greetings Compliance Experts.
Something disturbing came across my desk today I thought I would get
your
opinion on it.
On a CE marked peripheral we buy/sell as part of our laboratory
equipment
system, failed several immunity tests when we tested it as part of our system.
When we notified the peripheral's manufacturer of the problem (yes, I'm being
purposely vague) they said the failures were ok and sent us a "Certificate of
Compliance" by a very very well know compliance lab with the following
statement:
Snip
EMC Immunity:
EN 61326-1:1997/A1:1998/A2:2001 EMC requirements for Electrical
equipment for
measurement, control, and laboratory use.
- General Use for the following test with deviation of performance
criteria
to Criteria "C" instead of "B".
EN 61000-4-2
EN 61000-4-3
EN 61000-4-4
Unsnip
The peripheral manufacture said the EMC test lab told them they can put
the
CE marking on their product as long as they included the above deviation
statement in their documentation and DOC.
Is this true or was there some kind of miscommunication between the
test lab
and the peripheral manufacturer?
With this line of thinking, our test lab will not have to fail anything
in
the future; just pass it with a deviation in the requirements. (just kidding).
Thanks to all for your opinion.
The Other Brian
_________________________
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information intended for the named recipient(s) only. If you received this by
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