I think we have to give due respect to IEC and the many Experts who co-authored the standards. By giving more detail to the test setup and the equipment to be used, reduce the uncertainty and improve repeatability. I do agree that 30-50mm vs 75mm height has no significant impact. However, as an accredited lab, we do have to follow the standards rigorously. There are some assessors who will ensure that the standard is followed exactly, or be prepared to submit a 'method deviation' document. We bought a TESEQ clamp - it complies to the height requirement. The maximum diameter of the cable feeding is 20mm.
From: Cortland Richmond <k...@earthlink.net> To: EMC- PSTC <emc-pstc@LISTSERV.IEEE.ORG> Sent: Wednesday, 21 November 2012, 7:26 Subject: RE: Fischer CC EM Clamp F-203I-32mm I've noticed that when people don't understand a test, they often try to make it conform to every detail in the standards, prescripitve or or not. If it really mattered, I suppose one could turn the clamp sideways... Cortland Richmond -----Original Message----- >From: "Kunde, Brian" >Sent: Nov 20, 2012 12:15 PM >To: EMC- PSTC >Subject: RE: Fischer CC EM Clamp F-203I-32mm > > >Wendy, > >Who makes an EM Clamp that has a cable entry of 30mm? The size of the cores >needed to handle a cable diameter of any size will be large enough to make >this difficult if not impossible. Plus you have to have room for the input ‘N’ >connector mounted under the cores. > >I have never seen an EM Clamp where the cable entry wasn’t 50mm or greater >though I’m not saying one doesn’t exist. Typically they are more like 75mm. > >I don’t know where your supplier got this requirement. I don’t have the >latest version of the 4-6 standard but the copy I have only states in section >7.2, “The cable between the AE and the injection clamp shall be kept between >30mm and 50mm above the ground reference plane”. The text doesn’t say anything >about the height of the clamps or the cable height between the clamp and EUT, >though the picture in figure 6 shows it as 30mm. > >I don’t see where the short distance the cable has to run higher than 30-50mm >coming in and out of the clamp would have much impact on the test results. > >The Other Brian > >From:emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Wendy Nya >Sent: Tuesday, November 20, 2012 7:50 AM >To: EMC- PSTC >Subject: Fischer CC EM Clamp F-203I-32mm > >Dear All, > >We have a very old Fischer CC F-203I-32mm EM Clamp. A supplier pointed out >that it does not comply to the 61000-4-6 standard's requirement - the height >of the cable entry is more than the standard's requirement of 30-50mm. > >I just checked Fischer CC website. They are still selling this model. Is >anyone still using it? > >Regards, >Wendy >- >---------------------------------------------------------------- >This message is from the IEEE Product Safety Engineering Society emc-pstc >discussion list. 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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.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. 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...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org> David Heald <dhe...@gmail.com> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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