Eric: First, do not attach your scope (via probes) to the EUT if it generates a static charge on its own. First, it is possible to blow the front end of your scope, and secondly, a 10 Mohm impedance will probably be low enough that any charge cannot build-up to the level you want to measure.
John Shinn, P.E. Manager, Lab Operations Sanmina-SCI From: [email protected] [mailto:[email protected]]On Behalf Of Eric Penne Sent: Tuesday, July 08, 2003 1:38 PM To: [email protected] Subject: Monitoring Random ESD events I'm pretty new to the EMC scene and I need to monitor a product to see what kind of ESD events it generates on its own. The customer wants me to attach my oscope to their sensors and see what kind of ESD voltages their sensors see in daily operation. I know that I don't want to directly connect the oscope to the sensors while the machine is running. I was trying to figure out a way to "isolate" the signals on the sensors from the oscope but still get a value that is useful. I was thinking of some sort of current loop around the sensor wires. How would I correlate the current loop measurement to an ESD voltage? I'm probably not providing enough information but I'm not really sure what information will be needed. Thank you, Eric Penne [email protected] 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
