Bob, I have used a method that will give the RF loss resistance of a particular ground system. The rod must be out in the open- away from buildings by a few meters or so. Mount a 1/4 wavelength vertical antenna (7 meter rod)at the grounding point. Measure the input impedance at resonance. The ground resistance is equal to the input R-36 ohms. For example, you measure 76 ohms and your ground rod RF resistance is 40 ohms.
Dave Cuthbert Micron Technology From: [email protected] [mailto:[email protected]] Sent: Friday, October 10, 2003 4:04 AM To: [email protected] Subject: HF earth resistance test I'm used to testing earth rod installations at LF or DC. Does anyone know of an established technique for assessment at HF, say around 10MHz? Our Technical Director had heard of it when he was out in the far east, but no other details. Regards, Bob Edwards, Product Compliance Technical Authority Westinghouse Rail Systems Ltd., Chippenham, Wilts, U.K. Tel: (0)1249-441544 Fax: (0)1249-441419 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
