Darrell, I attribute this to triboelectric charging and find it quite irritating. I have estimated that I can charge to 25 kV when exiting my vehicle (wool pants and fabric seat). To avoid this I have to hold onto a bare metal part of the door frame. Very awkward procedure. Or, I can exit the vehicle carefully and discharge to the door frame through a key held in my hand (not nearly as bad as a bare finger discharge). I discharged through my cell phone once and it shut down. Now, how about if one of you automotive guys mandates static dissipative steering wheels? Then one merely has to hold onto the steering wheel while exiting to maintain oneself and the vehicle at the same potential. Or non-triboelectric fabric seats? Dave Cuthbert Micron Technology
From: Locke, Darrell [mailto:[email protected]] Sent: Monday, June 09, 2003 2:37 PM To: Mike Hopkins Cc: EMC-PSTC List Subject: RE: Automotive ESD Thanks to all who answered. The levels appear higher and this correlates to my own experience. I have noticed particularly in low humidity I really get some zaps when exiting my vehicle. Does anyone know why? An earlier response referred to being surrounded by metal results in greater capacitance. Thanks Darrell Locke Advanced Input Devices From: Mike Hopkins [mailto:[email protected]] Sent: Friday, June 06, 2003 2:51 PM To: Locke, Darrell Subject: RE: Automotive ESD There are several -- Ford, Chrysler, GM and others all have thier own -- then there is ISO, which is evolving towards the IEC 61000-4-2 model. Many require tests to 20kV and use discharge networks consisting of 300pf/5k, 330pf/2k and 150pf/2k among others. Some standards are: SAE J1113a, current in revision Chrysler PF 936B Ford ES-XW7T-1A278-AB EMC Requirements Overview ISO 7637-X And there are many more..... Hope this is helpful. Best Regards, Michael Hopkins Manager, EMC Technologies Thermo Electron Control Technology Division EMC & ESD Simulation Solutions One Lowell Research Center Lowell, MA 01852 Tel: +1 978 275 0800 ext. 334 Fax: +1 978 275 0850 [email protected] One Thermo, committed to integrity, intensity, innovation & involvement From: Locke, Darrell [mailto:[email protected]] Sent: Thursday, June 05, 2003 6:19 PM To: EMC-PSTC List Subject: Automotive ESD Group, Does anyone know the correct standard(s) for testing automotive ESD? Are these higher levels than Human Body ESD? Thanks Darrell Locke Advanced Input Devices
