This brings up a good real life story. I used to work with a technician (John) who helped with our in-house compliance testing. One day, we were discussing the Horizontal Coupling Plane (HCP) which has a 1MegaOhm drain wire to the Ground Reference Plane (GRP).
His theory was that he could stand on the GRP and touch the HCP during a discharge; and he wouldn't feel anything because of the drain wire. I argued that the 1MegaOhm resistance was much higher than his body resistance to ground; so he would get a very noticable "zap". Our theoretical arguments went nowhere. We decided to experiment. I have alot of respect for John; because he beleived strongly enough that he volunteered to be the guinea pig. I set the ESD gun for 4KV and hit the HCP. John's hands jumped from the HCP and he said something like "oooh" or "ouch" (I can't remember exactly). So, let that be a lesson to you guys out there. John already suffered so that others may learn :-) Chris Maxwell | Design Engineer - Optical Division email [email protected] | dir +1 315 266 5128 | fax +1 315 797 8024 NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA web www.nettest.com | tel +1 315 797 4449 | > -----Original Message----- > From: Chris Chileshe [SMTP:[email protected]] > Sent: Thursday, February 28, 2002 7:41 AM > To: 'emc-pstc' > Cc: '[email protected]' > Subject: RE: ESD Generator confidence test (humor) > > > > Brian proposes a confidence test on ESD guns using colleagues.. > > >> If the ESD gun is working properly, they will fall to the floor > quivering > >> slightly. Then they will wet their pants and forget who they are > for > >> about 25 to 30 minutes. > > A number of questions arise Brian.. > > Is the order of events an essential part of the confidence test i.e. > if they > wet their pants *before* they fall to the floor, will the gun be > deemed to > have failed the test? > > Is there any useful information to be gained from the slight quiver, > i.e. > frequency, amplitude etc which might help with calibration of the > discharge > tip? > > Should the stop-watch be calibrated or would any wrist watch do, > including the lab assistant's own? > > Has any such confidence test resulted in immediate vacancies in the > engineering department, specifically, for a lab assistant. > > Can we extend this principal to confidence tests on surge equipment > using middle management and members of the sales departments? > > Rgds > > - Chris > > -----Original Message----- > From: [email protected] [SMTP:[email protected]] > Sent: Tuesday, February 26, 2002 3:17 PM > To: [email protected] > Subject: Re:RE: ESD Generator confidence test > > > We also have come up with a simple way to test our ESD gun, but it > requires the > help from our lab assistant (lab managers work good too). > > First, have them take off their shoes and socks and stand on the > Ground > Reference Plan. Have them wet their fingers and grab the end of the > ESD gun. Crank up the gun to 16.5KV single shot and let them have it. > > If the ESD gun is working properly, they will fall to the floor > quivering > slightly. Then they will wet their pants and forget who they are for > about 25 to > 30 minutes. > > Keep in mind that this method is not yet approved by A2LA or NAVLAP. > > Have fun, > Brian > > ------------------------------------------- > 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] > > All emc-pstc postings are archived and searchable on the web at: > http://ieeepstc.mindcruiser.com/ > Click on "browse" and then "emc-pstc mailing list" > > ______________________________________________________________________ > __ > This e-mail has been scanned for all viruses by Star Internet. The > service is powered by MessageLabs. For more information on a proactive > anti-virus service working around the clock, around the globe, visit: > http://www.star.net.uk > ______________________________________________________________________ > __ > > ______________________________________________________________________ > __ > This e-mail has been scanned for all viruses by Star Internet. The > service is powered by MessageLabs. For more information on a proactive > anti-virus service working around the clock, around the globe, visit: > http://www.star.net.uk > ______________________________________________________________________ > __ > > ------------------------------------------- > 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] > > All emc-pstc postings are archived and searchable on the web at: > http://ieeepstc.mindcruiser.com/ > Click on "browse" and then "emc-pstc mailing list" ------------------------------------------- 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] All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
