From: Gordon,Ian [mailto:[email protected]] Sent: Wednesday, April 18, 2007 1:06 AM To: 'IEEE EMC & SAFETY PSTC' Subject: Magnetic field testing All Can anybody suggest a standard which describes how to perform magnetic field emission testing from DC to at least 500Hz in addition to a guide as to what instrumentation to use? Ideally we would like a plot of the field against its level, similar to that from a receiver as in electric field emission testing. Ian Gordon A good, inexpensive start is the EMCO 7604 Loop antenna, but it only covers 20 Hz to 500 kHz. Well, it does go lower, but then the antenna factor approaches infinity. Their 6502 is an active loop, but is specified only for 10 kHz through 30 MHz. A.H. Systems makes an SAS-560 passive loop, rated 20 Hz to 2 MHz. They also have an active loop, the SAS-563B, that's rated from 1 kHz to 30 MHz. Of course, a decent spectrum analyzer is suggested, as well as a low-noise pre-amp. If you really need to go down to DC, consider getting a magneto-resistive sensor built into a standard DIP. The Honeywell HMC-1001 sensor costs about $25, and will give you a DC output voltage proportional to the H-field. It can easily read the Earth's field (<.5 Gauss) and can resolve down to around 25 milligauss. Ed Price <mailto:[email protected]> [email protected] NARTE Certified EMC Engineer & Technician Electromagnetic Compatibility Lab Cubic Defense Applications San Diego, CA USA 858-505-2780 (Voice) 858-505-1583 (FAX) Military & Avionics EMC Is Our Specialty ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ - ---------------------------------------------------------------- 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/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: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
