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]>
