John
>What does 'no degradation' mean? 0%, 1%, 0.001%, 10%? It can only mean >0%: zilch, nada, nowt! How can that possibly be tested? The 'except' >text allows the manufacturer to specify a finite degradation that is not >exceeded. So can that "finite degradation" exceed the "normal performance within specification limits" of the general criterion A degradation? John John Harrington From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of John Woodgate Sent: Friday, November 07, 2008 8:46 AM To: emc-p...@ieee.org Subject: Re: FW: Deviation of Performance Criteria In message <F8D22487033A4C4490CE53694BB9D2D7@harrington09269>, dated Fri, 7 Nov 2008, John Harrington <jharring...@keithley.com> writes: >Hi Group > > > >While we all have our copies of EN 61326 close at hand I?d like to see >what your consensus of opinion is on the meaning of paragraph 6.2.102 >of EN61326-2-1. > > > >? 6.2.102 Tests with continuously present electromagnetic phenomenon > > > >No visual degradation of parameters of the EUT is allowed during >application of the test, except as specified by the manufacturer.? > > > >The standard calls it an ?addition? to the requirements of EN 61326-1 >section 6.2 but does not indicate whether it replaces the tables there >or modifies the Criterion A requirements. It modifies the Criterion A requirements, for philosophical reasons, which, as very rarely happens (;-), are also practical reasons. It must mean to apply to Criterion A, because that's the one most associated with continuously-present disturbances. What does 'no degradation' mean? 0%, 1%, 0.001%, 10%? It can only mean 0%: zilch, nada, nowt! How can that possibly be tested? The 'except' text allows the manufacturer to specify a finite degradation that is not exceeded. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Either we are causing global warming, in which case we may be able to stop it, or natural variation is causing it, and we probably can't stop it. You choose! John Woodgate, J M Woodgate and Associates, Rayleigh, Essex 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 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 ____________________________________________________________________________ _ 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
