And to expand on the C of A topic there are a few main scenarios I have seen:
1. A reasonable list. 2. Populated with everything by a lazy engineer at the agency who picked everything on the menu. 3. Populated with everything because the vendor didn't really want to test their component. Vendors of components should keep a watchful eye on the engineer at the agency to avoid #2 and keep the C of A list to the absolute minimum. Helps out the end user a lot. End users of components should avoid vendors who resort to #3. Dan From: Bryce Stammerjohan [mailto:bstammerjo...@thoratec.com] Sent: Thursday, August 20, 2009 3:29 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] what is a permanent label - UL R/C program Brian, Short (kinda) answers: 1 - To make it easier for end product mfrs to use, say a Tamura transformer, without having to pay for a full transformer evaluation (spacings, overload, temp., etc.) each time the same unit is submitted (plus it puts a little money in their pockets). 2 - Since Recognized Components (R/C) are by their definition incomplete products (as opposed, say, to a DVD player) the C of A's in the R/C report are there for easy guidance of the UL end-product test engineer, so they have a condensed list of things they must review when testing the DVD player with the R/C Tamura transformer that could affect the safety of the DVD player. It helps the UL engineer by not making them go back through (especially in the days before electronic record keeping where it might take days to get the original test data for said Component) to review the work to see what could affect their evaluation. Since most end product test engineers there are not well versed in the vast array of R/C in the products they see. Bryce former UL'er MOO - my opinions only, not any former or current employer's. ________________________________________ From: Brian O'Connell [oconne...@tamuracorp.com] Sent: Thursday, August 20, 2009 7:01 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] what is a permanent label Since I am the chair of the Stupid Questions Committee, I must ask what is, in fact, the purpose of the UL Recognized Component program; and what is the purpose of any conditions of acceptability in the UL component reports ? Brian From: emc-p...@ieee.org [mailto:emc-p...@ieee.org]On Behalf Of American Idle Sent: Wednesday, August 19, 2009 7:16 PM To: Gartman, Richard Cc: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: what is a permanent label Some Standards will tell you outright (example; 60950-1). If you use UL 969 approved labelling systems and pass your permanence of marking test, you should be OK. Keep in mind any special environmental conditions (extreme cold, UV exposure, etc) and that the label stock may need to be specifically approved for the material you are expecting it to adhere to. For some reason, UL is now requiring you to pass the permanence of marking test, rather than just accepting the UL 969 labels. -Ken A. - 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> - 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> - 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>
