Thanks to everyone of the information. It has been helpful. Can anyone recommend test equipment for measuring EMF/ELF? I received some information but would like more. Any and all recommendations are appreciated.
Thanks, The Other Brian From: [email protected] [mailto:[email protected]] On Behalf Of John Woodgate Sent: Tuesday, June 19, 2007 4:54 PM To: [email protected] Subject: Re: Low Freq EMF testing In message <c29d95f3.57cc7%[email protected]>, dated Tue, 19 Jun 2007, Ken Javor <[email protected]> writes: >I had no clue what this latest directive was, but recalled seeing it on >the cover of Conformity magazine. From there to the url, where the >limit at power-line frequencies is given not as an electric or magnetic >field, but as a current density, presumably a current density flowing >on the victim - a human body or simulation thereof. This is an example of the confusion caused by having many standards. The current density is the BASIS for the ICNIRP recommendations, by they are expressed (at power frequency) as field strength in amps per metre. The standard that deals with current density (IEC/EN 62226-2-1, I suppose) is about calculation methods; it does not deal with limits or the ICNIRP recommendations. > So it appears that what is needed is a current probe that measures >current density flowing on a surface, as opposed to a clamp-on probe. No, you measure the field strength. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk There are benefits from being irrational - just ask the square root of 2. 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 Notice: This communication may contain confidential information intended for the named recipient(s)only. If you received this by mistake, please destroy it and notify us of the error. Thank you. - 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 email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
