Robert A. Macy <[email protected]> wrote (in <[email protected]>) about 'EMC Ethics', on Mon, 18 Jul 2005:
>One of my EX-Clients rather than fixing the problem would "shop" test >labs. The client compared results from each lab and found a "dead" >test lab and used it to get passing data. I doubt you could do that in UK or Germany; the surveillance from the accreditation services is far too aggressive. > >I've always told my clients that not passing with good margin merely >points out that the design is "out of control". There are some situations where the test results are inherently wildly variable for well-understood reasons. An example is the mains harmonic emissions from single-phase rectifiers with capacitive filters. > Geesh! If you can't even control a smple thing like emissions and >susceptibility what's the warrantee costs and marginal performance >going to be like? I'm glad you think that emission and immunity control is simpler than ensuring satisfactory performance. I think much experience suggests the contrary, IF the design-for-performance process is itself under control - no 'cut-and-try'. -- Regards, John Woodgate, OOO - Own Opinions Only. Deadlines are 90% of deadliness. http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk 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 [email protected] Instructions: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
