Yes, EMC and safety must be designed in. It follows that the person who designed it in must also be able to predict the test outcome.
If the test outcome is not as predicted, either the test was wrong or the prediction was wrong. In my experience (safety), the test house would like you to believe that they know more about the subject than you do. However, I have found that they seldom do. They may be experts in testing, but the application of a particular test to a particular product may not be correct. Best regards, Rich From: John Woodgate <[email protected]> Sent: Thursday, April 18, 2019 12:43 PM To: [email protected] Subject: Re: [PSES] Question re: Measuring a signal in a noisy environment Out of that long email, I selected the text below. I know Ed was writing about the past, but things have changed, not enough yet but quite a bit. Compliance (EMC and safety) must be designed-in. Imposing compliance on a 'finished' design causes delay, maybe even fatal delay, and avoidable increased costs. This inevitably means that design engineers DO need to know the standards and the test process, 'well enough' at least. The test house would normally know more about both, due to more varied experience, much better than 'well enough'. Best wishes John Woodgate OOO-Own Opinions Only J M Woodgate and Associates www.woodjohn.uk <http://www.woodjohn.uk> Rayleigh, Essex UK On 2019-04-18 19:18, Edward Price wrote: I didn’t expect my customer to be an expert in either the standard or the test process. - ---------------------------------------------------------------- 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://www.ieee-pses.org/list.html (including how to unsubscribe) 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]>
