John referenced “skin resistance.”
To my knowledge, there is no research that shows skin resistance and body resistance as separate parameters. We only know total body resistance, and that it is a variable that changes – lowers -- with applied voltage and time. Having said that, a good guess that skin resistance is the predominant parameter at low voltages. The “body” is comprised of water-predominate organs, so is likely to be a lower resistance than skin resistance and relatively constant with voltage. We also know that capacitance parallels the total body resistance. But, as with resistance, we don’t know how to apportion the capacitance to the skin and to the body. If you know of any such research, please let me know. Best regards, Rich From: John Woodgate <j...@woodjohn.uk> Sent: Wednesday, March 13, 2019 1:30 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] classification of the output We found very great differences in human 'skin resistance' at effectively zero voltage when designing TV tuners with touch-contact channel selection. We had to make the sensitivity so high that there was a risk that houseflies would change the channel. Best wishes John Woodgate OOO-Own Opinions Only J M Woodgate and Associates www.woodjohn.uk <http://www.woodjohn.uk> Rayleigh, Essex UK On 2019-03-13 05:22, Pete Perkins wrote: - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
