Doug, Doug asked: Do the unrestricted limits for the ISM frequencies really apply to both radiated and conducted or to only radiated emissions?
I think yes and here is why. The 2nd ED of 60601-1-2 required testing to 61000-4-6 at a level of 10V at the ISM frequencies below 80 MHz and 3V everywhere else. Hope this helps. Best regards, Jim P.S. I hope the main return path for the ISM transmitter is not back through the power lines! Jim Conrad Conrad EMC Consulting P.O. Box 25 Hamilton, MA 01936 USA Phone: 978-468-3909 E-Mail: jc...@shore.net -----Original Message----- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org] On Behalf Of POWELL, DOUG Sent: Monday, June 25, 2001 7:21 PM To: EMC-PSTC (E-mail) Cc: HARDMAN, BRYAN; JOHNSON, J. D. Subject: EN 55011 Fundamental ISM frequencies Dear groups, My company is a manufacturer of equipment defined in EN55011 (CISPR 11) as Group 2, Class A products and a question has come up regarding the ISM frequencies that I am hoping you can clarify for us. Tables Ia and Ib of the standard list the fundamental ISM frequencies and their associated limits (or lack of). Since column 3 (column 2 of Ib) is titled "Maximum radiation limit", it has been thought by every compliance engineer in my company, that these forgiveness bands only apply to radiated emissions. However, paragraph 3.3 states that "... The limits for terminal voltages and radiation do not apply to these ISM frequencies ..." It appears that there is a discrepancy in the language if these two references. So the question is this: ------------------------ Do the unrestricted limits for the ISM frequencies really apply to both radiated and conducted or to only radiated emissions? Any opinions or discussion on this would be greatly appreciated. -doug ================================= Douglas E. Powell Regulatory Compliance Engineer Advanced Energy Industries, Inc. 1625 Sharp Point Dr. Ft. Collins, Co 80525 mailto:doug.pow...@aei.com www.advanced-energy.com ================================= ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall," ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall,"
