On Sat, 18 Feb 2023 19:12:57 +0900, "T.Sato" <[email protected]> wrote: ... > However, in case of the EMC Directive, it requires "... it complies > with this Directive when properly installed, maintained and used for > its intended purpose." > > If if is considered that to install tens of LED lights in a house is > covered by the "intended purpose", shouldn't the LED lights still > comply with the essential requirements of the Directive in that > configuration, too?
P.S. I didn't mean to test tens or hundreds of lamps as a whole. I only said that they shouldn't cause interference poblem (it is half of the essential requirements of the Directive) when installed and used as intended. Regards, Tom >> On Fri, Feb 17, 2023 at 6:56 PM Ken Javor <[email protected]> >> wrote: >> >>> I’m finding this an extremely interesting discussion. I don’t have >>> anything definitive to offer, but I do have a question to help stir the pot. >>> >>> If the possibility that multiple items might be used together and that >>> emissions will be additive in some fashion is a justification for testing >>> multiple units at a time, what about ... light bulbs? >>> >>> Meaning CFLs or LEDs. >>> >>> My house is full of them. It is reasonable to assume that most >>> homes/businesses are. Perhaps the emissions limits for these were based on >>> this reasonably foreseeable outcome? >>> >>> Ken Javor >>> Phone: (256) 650-5261 >>> >>> >>> ------------------------------ >>> *From: *John Mcbain <[email protected]> >>> *Reply-To: *John Mcbain <[email protected]> >>> *Date: *Fri, 17 Feb 2023 14:22:44 -0800 >>> *To: *<[email protected]> >>> *Subject: *Re: [PSES] Adding more than one EUT >>> >>> Hi Derek - >>> >>> Typical requirement for a unit that may be sold and used in multiples >>> (that is, all the units can be sold together as one product) is you can >>> test just one IF adding the other units does not increase the emissions. >>> >>> Of course the most practical way to determine that is to assemble the >>> multiple units to see what happens. If the test result for testing max. >>> connected units compared to testing only one unit shows no significant >>> difference, then you're good - but definitely archive those test results! >>> >>> If you can't pass the test with all units connected, then whatever you do, >>> don't let Marketing create a multiple-unit product to sell. ;-) >>> >>> Similarly, the desktop PC system that James mentioned would have all power >>> cords separately tested for conducted emissions as a fully connected system >>> (monitor, printer, scanner, etc. attached) if it is a product sold as a >>> complete all-included system. >>> >>> Best regards, >>> John McBain >>> >>> >>> On Fri, Feb 17, 2023 at 1:59 PM James Pawson (U3C) < >>> [email protected]> wrote: >>> >>> >>> Hi Derek, >>> >>> >>> Is the daisy chain connection the AC supply or some other power bus? >>> >>> >>> How is 8 units daisy chained any different to 8 separate units all on the >>> same power bus? We are looking for individual emission contributions from >>> each connected unit. >>> >>> >>> If measuring conducted emissions on a desktop pc (y'know, the big ones we >>> had before everyone had laptops to work from home...) the you would just >>> measure the PC, not the monitor and printer and scanner and modem and and >>> and... >>> >>> >>> Just thinking aloud >>> >>> All the best >>> >>> James >>> >>> >>> ---- Lfresearch wrote ---- >>> >>> Hi folks, >>> >>> >>> >>> I’ve been asked to test a light fixture that has the ability to be daisy >>> chained up to 8 units. >>> >>> >>> >>> When I run conducted emissions, I’m wondering if I need to insist on >>> having 8 units plugged in at once i.e. fully populated, OR, can I just test >>> one fixture at a time since that’s how the system is likely to be used >>> also.. >>> >>> >>> >>> Is there a legal requirement or precedent on how this should be tested as >>> I’m going round in circles arguing with myself here. >>> >>> >>> >>> Thanks, >>> >>> >>> >>> Derek. >>> >>> >>> >>> SSCLabs, >>> >>> Reno, NV. >>> >>> - >>> >>> ---------------------------------------------------------------- >>> >>> 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 >>> >>> >>> >>> 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: >>> >>> Mike Cantwell <[email protected]> >>> >>> >>> >>> For policy questions, send mail to: >>> >>> Jim Bacher: <[email protected]> >>> >>> David Heald: <[email protected]> >>> >>> _________________________________________________ >>> >>> To unsubscribe from the EMC-PSTC list, click the following link: >>> https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1 >>> >>> - >>> ---------------------------------------------------------------- >>> >>> 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 >>> >>> Website: http://www.ieee-pses.org/ >>> Instructions: http://www.ieee-pses.org/list.html (including how to >>> unsubscribe) <http://www.ieee-pses.org/list.html> >>> List rules: http://www.ieee-pses.org/listrules.html >>> >>> For help, send mail to the list administrators: >>> Mike Cantwell <[email protected]> >>> >>> For policy questions, send mail to: >>> Jim Bacher <[email protected]> >>> David Heald <[email protected]> >>> ------------------------------ >>> >>> To unsubscribe from the EMC-PSTC list, click the following link: >>> https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1 >>> >>> - >>> ---------------------------------------------------------------- >>> >>> 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 >>> >>> Website: http://www.ieee-pses.org/ >>> Instructions: http://www.ieee-pses.org/list.html (including how to >>> unsubscribe) <http://www.ieee-pses.org/list.html> >>> List rules: http://www.ieee-pses.org/listrules.html >>> >>> For help, send mail to the list administrators: >>> Mike Cantwell <[email protected]> >>> >>> For policy questions, send mail to: >>> Jim Bacher <[email protected]> >>> David Heald <[email protected]> >>> ------------------------------ >>> >>> To unsubscribe from the EMC-PSTC list, click the following link: >>> https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1 >>> >>> - >>> ---------------------------------------------------------------- >>> >>> 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 >>> >>> Website: http://www.ieee-pses.org/ >>> Instructions: http://www.ieee-pses.org/list.html (including how to >>> unsubscribe) <http://www.ieee-pses.org/list.html> >>> List rules: http://www.ieee-pses.org/listrules.html >>> >>> For help, send mail to the list administrators: >>> Mike Cantwell <[email protected]> >>> >>> For policy questions, send mail to: >>> Jim Bacher <[email protected]> >>> David Heald <[email protected]> >>> ------------------------------ >>> >>> To unsubscribe from the EMC-PSTC list, click the following link: >>> https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1 >>> >> >> - >> ---------------------------------------------------------------- >> 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 >> >> 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: >> Mike Cantwell <[email protected]> >> >> For policy questions, send mail to: >> Jim Bacher: <[email protected]> >> David Heald: <[email protected]> >> _________________________________________________ >> To unsubscribe from the EMC-PSTC list, click the following link: >> https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1 > > - > ---------------------------------------------------------------- > 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 > > 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: > Mike Cantwell <[email protected]> > > For policy questions, send mail to: > Jim Bacher: <[email protected]> > David Heald: <[email protected]> > _________________________________________________ > To unsubscribe from the EMC-PSTC list, click the following link: > https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1 - ---------------------------------------------------------------- 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 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: Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]> _________________________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1
