Well, just about as I expected, EMC compliance can't be defined by some set of "critical components." Everything in a product is "critical", as well as the component placement and installation. An inspector can't use a checklist of "critical components" to ensure continuing EMC compliance because the EMC situation isn't as easy as a component inventory. Even if all the EMC "critical components" were present, a re-routed wire or a slight difference in a mechanical dimension could make a huge difference. Maybe for something like Safety, a list of "critical components" is acceptable (it's better than nothing, but I don't think Safety is all that much simpler than EMC either).
Maybe I'm just not seeing the bigger picture, but to me, a component list is a pretty poor aid to ensuring any continuing product compliance. Ed Price WB6WSN Chula Vista, CA USA From: Bayo Olabisi [mailto:[email protected]] Sent: Wednesday, March 13, 2013 2:51 PM To: [email protected] Subject: Re: [PSES] Critical component in EMC report What's critical for product safety isn't always critical for EMC - they are two compliance domains and 3rd party lab reports treat them as such. While EMC involves assessment to regulatory limits for emissions (potential for interference) or immunity to external interference, product safety tends to address potential for electric shock, fire, and other hazards. EMC reports document EUT test setups, instrumentation used, etc to assure repeatability of test data, product safety reports conversely document critical components, and some EUT test setups. One other point (for US based folks) - critical components are typically checked by the certifying agency versus the report during routine field inspections post-production, though such routine inspections aren't done for EMC. _____ From: Scott Xe <[email protected]> To: [email protected] Sent: Wednesday, March 13, 2013 11:48 AM Subject: [PSES] Critical component in EMC report It is common not to have critical component list in EMC reports issued from 3rd party laboratories. Those information are essential to track if the correct parts to be used in mass production. What is main reason not to have it as a common practice in the field? Thanks and regards, Scott - ---------------------------------------------------------------- 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.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 <[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.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 <[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.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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
