Hi Brian, They should have used IEC 61000-3-2 for conducted emissions. That standard is called out in the Generic EMC emission standard, IEC 61000-6-3 applicable to residential equipment where no product-specific standard is available. You need to check the IEC store and then the OJEC list of harmonized standards. If the product in question is a battery charger, then I conclude that the generic EMC standard is the best fit for satisfying the EMC directive. With reference to the weird looking emissions spectra you saw on the plot, I wonder if the test equipment was in good working order. We also tested ours with a known "comb generator" RF source before and after each test session to be sure our measurement apparatus was functioning properly. We were the only company in the metropolitan Vancouver area who were fortunate to have our own 3-meter semi-anechoic EMC room with a full HP test rack, antennas, and LISNs. That room got a lot of use. Ralph From: Brian Gregory <[email protected]> Sent: August 27, 2025 2:33 PM To: [email protected] Subject: Re: [PSES] Hazards, risks with EMC emissions? Ralph noted: > For the Method yes, but as John Woodgate pointed out, you need another CISPR or > EN standard to defined limits. They used IEC 61000-3-3 Cl. B for the conducted emissions. On top of that, the QP data we saw showed a smooth line from (~ 90dBuV at 168 kHz "corrected"), on a linear slope down to ~ 1MHz, whereupon the data started looking like a typical EMC plot; jagged lines with some peaks. The first peak was at 2MHz. Both me and the Engr VP looked at the plot on a big screen, and said ... WTF? The Averaged data showed only very small squiggles with the same slope, starting at 58.6dBuV at 170 kHz "corrected" and started showing regular sized peaks and bumps at about 2 Mz. These are the weirdest test results I've seen; but I have no where the experience as most of you. We're meeting again with the customer this afternoon, and I'm still poorly informed on: What is the hazard or risk? Colorado Brian
Please note: message attached From: Ralph McDiarmid <[email protected] <mailto:[email protected]> > To: [email protected] <mailto:[email protected]> Subject: Re: [PSES] Hazards, risks with EMC emissions? Date: Tue, 26 Aug 2025 13:34:20 -0700 _____ 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] <mailto:[email protected]> All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/[email protected]/ <https://www.mail-archive.com/[email protected]/%20> Website: https://ewh.ieee.org/soc/pses/ <https://ewh.ieee.org/soc/pses/> Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) <https://ewh.ieee.org/soc/pses/list.html> List rules: https://pses.ieee.org/wp-content/uploads/2024/12/EM-PSTC-List-Rules.pdf For help, send mail to the list administrators: Mike Sherman at: [email protected] <mailto:[email protected]> Rick Linford at: [email protected] <mailto:[email protected]> For policy questions, send mail to: Jim Bacher at: [email protected] <mailto:[email protected]> _____ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC <https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1> &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: https://www.mail-archive.com/[email protected]/ Website: https://ewh.ieee.org/soc/pses/ Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) List rules: https://pses.ieee.org/wp-content/uploads/2024/12/EM-PSTC-List-Rules.pdf For help, send mail to the list administrators: Mike Sherman at: [email protected] Rick Linford at: [email protected] For policy questions, send mail to: Jim Bacher: <[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
