I have been hanging out in the lab and doing more experiments, this time on the 61000-4-4 Capacitive Clamp. The clamp is quite directional and this can cause test problems including failing compliant systems.
Abstract: Analysis is performed of the currents injected by the IEC 61000-4-4 Capacitive Clamp using current probes. Surprising results of the current measurements indicate that the Capacitive Clamp is directional and sends more energy to the support equipment (AUX) than to the equipment under test (EUT)! The directional property of the Capacitive Clamp also leads to a common lab error where significantly more energy is applied to the EUT if the clamp is not properly connected, potentially causing compliant equipment to fail the test. (Almost every EMC test lab I know has made this error!) The link to the article is the picture of the experimental test setup at the bottom of the home page at http://emcesd.com . Doug -- ___ _ Doug Smith \ / ) P.O. Box 1457 ========= Los Gatos, CA 95031-1457 _ / \ / \ _ TEL/FAX: 408-356-4186/358-3799 / /\ \ ] / /\ \ Mobile: 408-858-4528 | q-----( ) | o | Email: [email protected] \ _ / ] \ _ / Website: http://www.dsmith.org This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
