Hi Bob. You wrote:
<Article 9(1) states "Each apparatus shall be identified in terms of type, batch, serial number, or any other information allowing for the identification of the apparatus". Is this saying that if serial numbers exist, then they must be on the DoC? I hope not.> The intention is, of course, to confirm that the device sold and covered by the CofC, is the same as the device tested around which the CofC was generated. I have always put Manufacturer, machine part/model number, revision, and a 'from serial number' entry onto a CofC, that covers the past, but how long is the future? But your points bring up the old question of Evaporation of Compliance. i.e. how long does a C of C remain valid, even without a model revision there are all sorts of changes that may creep in to a design. - Changes to chip suppliers bith the same generic part number. - Technology 'improvements' e.g. faster clock edges, higher slew rates, on the same chip part number. - Change to sub contract manufacturer. - Change to lead free components. - Changes due to obsolescence. - Changes to case materials. All essentially ending up on the same machine with the same model number, but with possibly very different EMC footprints. So.. Assuming no design or component changes, how long should a Cof C remain valid? 1 year. 5 years, 10 years, 20 years? Chris Dupres *******************Internet Email Confidentiality Footer******************* The contents of this e-mail message (including any attachments hereto) are confidential to and are intended to be conveyed for the use of the recipient to whom it is addressed only. If you receive this transmission in error, please notify the sender of this immediately and delete the message >from your system. Any distribution, reproduction or use of this message by someone other than recipient is not authorized and may be unlawful. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.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...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
