In message <405834.27014...@web51806.mail.re2.yahoo.com>, dated Fri, 21 Aug 2009, Wendy Nya <wendy...@yahoo.com> writes:
>My company is deliberating to setup the IEC 61000-4-8 test with test >level up to 200 Gauss. We checked that the max permissible level >based on ICNIRP guidelines is 10 A/m2. I did some conversion and the >results came up to be only 0.2 A/m2. > >Can anyone confirm if my conversion is correct. I don't think you should expose people to the test field strength, although fingers and even hands don't seem to be affected even by stronger fields. How did you do the conversion? Converting the Stone Age unit gauss to SI units is not uncertain, but then converting to current density is quite ill-defined. And are you SURE you mean '10A/m^2', which is a current density, or do you mean '10 A/m', which is a magnetic field strength? 200 Gs = 0.02 T (tesla) 1 A/m corresponds in air to 1.26 μT. So 200 Gs corresponds to nearly 16000 A/m **in air** - much less in iron. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Things can always get better. But that's not the only option. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - 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.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 <emcp...@socal.rr.com> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
