>>So can that "finite degradation" exceed the "normal performance within >>specification limits" of the general criterion A degradation?
>It depends what individual standards say: not all have exactly the same >wording for Criterion A. I think this is specific to EN 61326-1 and EN 61326-2-1 >In any case, the manufacturer has to consider carefully how to word the >statement. If the manufacturer uses those words then he must widen his >spec limits to allow for the degradation, otherwise a product at the >unfavourable performance limit would violate the criterion in the >presence of the disturbance. For example, 'Signal-to noise ratio better >than 80 dB'. If that can be degraded by 3 dB in the presence of the >disturbance, then the statement must say '77 dB', not '80 dB'. But where is this statement? Not on the DofC. Not on the spec sheet. May be in the test report, may be on some justification document at the bottom of the filing cabinet. My point being that the manufacturer can now claim compliance to criterion A regardless of actual performance and the customer (like Brian's original issue) has even less opportunity to determine what that means. This appears to be worse than the previous version of the standard. ____________________________________________________________________________ _ Scanned by IBM Email Security Management Services powered by MessageLabs. For more information please visit http://www.ers.ibm.com ____________________________________________________________________________ _ _____________________________________________________________________________ Scanned by IBM Email Security Management Services powered by MessageLabs. For more information please visit http://www.ers.ibm.com _____________________________________________________________________________ - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
