Re: [PSES] Audio Frequency Induction Loop
John Sorry the quoted limits from the installer of the Afil system are from BS EN 60118-4:1998 : I will read the 2006 and see if there have been any changes. Regards Andy -Original Message- From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: 27 January 2014 17:33 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Audio Frequency Induction Loop In message beda313b3e2b304ca6a08001bd61c9c01a257...@ukmb01.mottmac.group.int, dated Mon, 27 Jan 2014, McCallum, Andy andy.mccal...@mottmac.com writes: EN50121-2:2006 states in Table C1 that the typical magnetic field from a 750V catenary railway drawing 1000A at 10m is 15 micro Teslas (15000nT or 15 ?T). The field will decay at approximately the distance squared ; so at 35m the field will be down to around 10nT. I'd want to confirm that by my own calculation. I can't do that immediately, but later. BS EN 60118-4:2006. This standard states : 5.2 Environmental audio-frequency magnetic background fields The function of the installed induction loop system may not be satisfactory if there are undue environmental magnetic background fields. The maximum A-weighted environmental magnetic background noise level re 1 A/m, measured with the time weighting S (as defined in IEC 61672), should not exceed – 40 dB anywhere in the operational area. I don't know where you got that from (maybe a draft or an older edition of the standard), but it's nothing like the text of EN 60118-4:2006. 5.2 is about speech signals and magnetic noise is in 4.2.2. I am conducting some tests on the tram tonight which should give me some more figures to use. OK: the spectrum of the field matters. Maybe you can capture it with a free audio program such as Audacity. -- OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk Nondum ex silvis sumus John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - 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 emcp...@radiusnorth.net 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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] General Product Safety Directive
Scott Is this directive applicable to all products? No - it's more of a catch-all for consumer products not covered by other (CE marking) directives. More information http://ec.europa.eu/consumers/safety/prod_legis/index_en.htm Article 3.3 of the GPSD discusses the hierarchy for demonstration of compliance through application of standards and/or other documents. Regards Charlie -Original Message- From: Scott Xe [mailto:scott...@gmail.com] Sent: 29 January 2014 03:34 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] General Product Safety Directive Hi Is this directive applicable to all products? If the product complies with the standard listed in OJ, the product is considered in compliance with GPSD? If I cannot find any relevant harmonised product specific standard for verification, how can the supplier demonstrate the product in compliance with GPSD? Best 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 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 emcp...@radiusnorth.net 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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
[PSES] Need HDMI connection solution for EMC enclosure
Hello all, Does anyone know of a HDMI connector solution for penetrating an EMC enclosure PEM panel? (I am considering fibre but its just a bit expensive) Best Regards Charles Grasso Compliance Engineer Echostar Communications (w) 303-706-5467 (c) 303-204-2974 (t) 3032042...@vtext.com (e) charles.gra...@echostar.com (e2) chasgra...@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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
