Hi John, Quartz Watches are exempted from the EMC Directive, according to the guide for the EMC Directive, see Guide for the EMC Directive 2004/108/EC page 14 - 15: http://ec.europa.eu/enterprise/sectors/electrical/files/emc_guide__updated_2 0100208_v3_en.pdf
Best regards Helge Knudsen Denmark -----Original Message----- From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of John Woodgate Sent: 26. januar 2012 04:43 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: EMC and RTTE directive - out of scope because of power levels? In message <7b3d1875a9a53142ab5d421ee97d0e6003bbb...@ccsexchange.ccsdomain.ccsemc.co m>, dated Wed, 25 Jan 2012, Michael Heckrotte <michael.heckro...@ccsemc.com> writes: >Years ago I recall discussions about electronic wristwatches and FCC >compliance; the power drawn from the watch battery was less than the >output power of an emission that would just pass the Class B limit >therefore compliance was inherent and no EMC testing was required. I >don?t know if this was ever codified. It wasn't codified into the EMC Directive or the Guide, but it is a very good approach and would probably convince in Europe. I suspect it's not inconsistent with my suggestion that actual emission 40 dB below the relevant limit is a criterion for 'benign' that some would demand. > >Extending this concept to a radio would give new meaning to a >flea-powered transmitter. Indeed, but EMC basically doesn't care whether the radiator is intentional or not (except on-channel, of course); what is sauce for the wristwatch is sauce for the radio. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK Some people who are peeling the finch of the financial crisis are thinking of biting a rook. - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. 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 <emcp...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com> - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. 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 <emcp...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
