On Tue, 7 Apr 2009 13:08:54 +0100, John Woodgate <[email protected]> wrote:
> In message <[email protected]>, dated Tue, 7 Apr 2009, > Andrew McCallum <[email protected]> writes: > > >EN 55014-1:2006 applies to many household appliances but seems to only > >apply emission limits from 30 - 1000 MHz to toys. Coffee makers, ovens > >etc etc have emission limits up to 30MHz/300MHz measured with an > >absorber clamp around the mains lead. No actual radiated emission > >measurements are made. Can anyone explain the justification for this? > > In the past, household appliances rarely, if ever, produced radiated > emissions above 30 MHz, and radiated emissions can't really be measured > below 30 MHz because the background noise level is too high. > > It is true that the standard is late in being updated to take into > account techniques that can produce significant radiated emissions, but > these things do take time to develop and agree. I hope EN 55014-1:2006/A1:200X cure the situation. CISPR 14-1:2006/A1:2008 is already available, but it seems its EN version is still under consideration. Regards, Tom Tomonori Sato <[email protected]> URL: http://homepage3.nifty.com/tsato/ - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
