Well, sort of twice. In the manufacturer's own in-house testing, 101 V is applied. At the test house, some days/weeks/months later, 99 V is applied.
With best wishes DESIGN IT IN! OOO – Own Opinions Only www.jmwa.demon.co.uk J M Woodgate and Associates Rayleigh England Sylvae in aeternum manent. -----Original Message----- From: Harris, Kevin J (DSC) [mailto:kevinharr...@tycoint.com] Sent: Thursday, September 22, 2016 4:27 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Measurement Accuracy Hello All Have I misunderstood the words in IEC62052-31? In a hypothetical measurement of an applied voltage where the uncertainty of the exact value is 1% and a test voltage of 100 is required, the manufacturer would need to insist on a 101V test voltage and the test facility would have to insist on 99V. Does this imply the test has to be applied twice? Kevin -----Original Message----- From: John Woodgate [mailto:jmw1...@btinternet.com] Sent: Thursday, September 22, 2016 4:13 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Measurement Accuracy Thank you. With best wishes DESIGN IT IN! OOO – Own Opinions Only www.jmwa.demon.co.uk J M Woodgate and Associates Rayleigh England Sylvae in aeternum manent. -----Original Message----- From: Balmukund Vyas [mailto:balmukund.v...@ymllabs.com] Sent: Thursday, September 22, 2016 8:41 AM To: John Woodgate <jmw1...@btinternet.com>; EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: [PSES] Measurement Accuracy It is in IEC62052-31; which I believe refers to IEC61010-1 -----Original Message----- From: John Woodgate [mailto:jmw1...@btinternet.com] Sent: Thursday, September 22, 2016 11:28 AM To: Balmukund Vyas; EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: [PSES] Measurement Accuracy Which standard has that very sensible text? With best wishes DESIGN IT IN! OOO – Own Opinions Only www.jmwa.demon.co.uk J M Woodgate and Associates Rayleigh England Sylvae in aeternum manent. -----Original Message----- From: Balmukund Vyas [mailto:balmukund.v...@ymllabs.com] Sent: Thursday, September 22, 2016 5:05 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Measurement Accuracy It might be worth mentioning the text from one of the safety standard as below : If, when carrying out a conformity test, there is any uncertainty about the exact value of an applied or measured quantity (for example, voltage) due to the tolerance: a) the manufacturer should ensure that at least the specified test value is applied; b) the test house should ensure that no more than the specified test value is applied. B M Vyas ________________________________ This e-mail contains privileged and confidential information intended for the use of the addressees named above. If you are not the intended recipient of this e-mail, you are hereby notified that you must not disseminate, copy or take any action in respect of any information contained in it. If you have received this e-mail in error, please notify the sender immediately by e-mail and immediately destroy this e-mail and its attachments. - ---------------------------------------------------------------- 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.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 <sdoug...@ieee.org> 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.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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
