>From < http://www.med.unc.edu/medicine/card/fellows/patientinstructions/EMI.pdf> :
"Note: If you have an ICD [Implantable Cardiac Defibrillator], some strong magnetic fields may cause your device to make beeping tones." Wow - I hope patients know about the possibility of beeping! If I didn't know, and my chest started beeping, I think I'd have a heart attack. Pat Lawler EMC Engineer SL Power Electronics Corp. [email protected] wrote on 10/22/2010 03:12:53 PM: > Page 4 of > http://www.med.unc.edu/medicine/card/fellows/patientinstructions/EMI.pdf > has some welding specific guidelines but no references as to where the > numbers came from. I'd ask the source ( www.guidant.com ) what studies > back up their assertions. Also see > http://www.ncbi.nlm.nih.gov/pubmed/1279591 and > http://samplecode.rockwellautomation.com/idc/groups/literature/documents/ > wp/nets-wp002_-en-p.pdf . > > Orin > On Fri, 22 Oct 2010 13:48:39 -0700 [email protected] writes: > > Though I have seen lots of mentions of electromagnetic emissions by > > welding equipment in the web searches I have done, I have seen no > > quantitative measurements. > > > > The only indirect indication of the level of emissions is the > > immunity > > levels called out in IEC 60974-10 (10 V/m as per IEC 61000-4-3, > > which our > > equipment meets as well). But my guess is that this test is nearly > > redundant for the equipment manufacturers, since I expect the level > > of > > emissions produced during welding to be as much if not more of a > > problem. > > > > Donald Borowski > > Schweitzer Engineering Labs > > Pullman, Washington, USA > > > > > > > > From: > > John Woodgate <[email protected]> > > To: > > [email protected] > > Date: > > 10/22/2010 01:37 PM > > Subject: > > Re: Test Standards for immunity to EMI from TIG and MIG welders? > > Sent by: > > [email protected] > > > > > > > > In message > > <ofb20eb02e.ce4c32e9-on882577c4.0061e8f4-882577c4.00638...@selinc.com>, > > > > dated Fri, 22 Oct 2010, [email protected] writes: > > > > >So my last (and now most important) question is: Is there any > > >literature describing the electromagnetic environment around TIG > > and > > >MIG welders while in operation in the field? > > > > I'm sorry that the IEC standard was inadequate. It's true that the > > welding process in inherently subject to large variations in almost > > > > every characteristic. > > > > I looked at standards related to exposure to EMF from arc welding > > equipment, (such as EN 50444) but I did not find any description of > > the > > environment. > > -- > > 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 > > If at first you don't succeed, delegate. > > But I support unbloated email http://www.asciiribbon.org/ > > > > - > > ---------------------------------------------------------------- > > 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]> > > > > > > - > ---------------------------------------------------------------- > 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]> - ---------------------------------------------------------------- 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]>
