John, The product is a Direct plug-in power supply, switched mode type.
Best regards, Kris Carpentier Regulatory & Approvals From: [email protected] [mailto:[email protected]] On Behalf Of John Woodgate Sent: vrijdag 25 april 2008 12:33 To: [email protected] Subject: Re: Standards for accoustic noise In message <1f5308c5923f3b4daa51d189bf255006036b0...@edgmsmail01.eu.thmulti.com>, dated Fri, 25 Apr 2008, Carpentier Kristiaan <[email protected]> writes: >Products with transformers sometimes produce noise due to fact that >parts of the transformer are not fixed well or due to piezo-electric >effect. The acoustic level is rather low but can be annoying. Can >anyone point me to standards that describe this kind of acoustic >measurements and limits? There are some standards, but they are product-type specific. Which sort of product are you concerned with? Is this a mains transformer or one operating at a higher audible frequency? -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Murphy's Law has now been officially re-named The Certainty Principle 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 [email protected] 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] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc - 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/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] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
