Doug Smith has such a measurement on his website. Maybe that will help?
________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Ken Wyatt Sent: Sunday, June 21, 2009 8:05 PM To: Jim Hulbert Cc: [email protected] Subject: Re: [PSES] Chassis Bond Impedance Measurement Jim, as others have suggested, this is a pretty touch measurement to make with any certainty using conventional means. If the two modules are operational, it's possible to measure the HF voltage difference between the two pieces of metal structure (or connection) with a differential probe connected to a spectrum analyzer. You should be able to see in real time any effects at reducing the bonding impedance. If the bond in question is passive, you might try a transfer impedance measurement such as used to measure EMI gaskets. Regards, Ken Wyatt Technical Services, LLC 56 Aspen Dr. Woodland Park, CO 80863 Email: [email protected] Web: www.emc-seminars.com LinkedIn: http://www.linkedin.com/in/kennethwyatt (719) 310-5418 On Jun 18, 2009, at 3:29 PM, Jim Hulbert wrote: What is an easy (and inexpensive) means of measuring the high frequency chassis bond impedance between two modules of a system? I would like to get an impedance value at 500 MHz and 1 GHz. Thanks. Jim Hulbert Pitney Bowes - 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.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ 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]> - 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.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ 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]> - 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.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ 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]>
