Re: Need electrical characteristics of epidermis (skin)
One does wonder what evil experiments you have planned for the weekend ! From two sources, Wet Skin, hand to hand, ~1000ohm Dry Skin, hand to hand, ~100,000ohm. approx. values for male adults. Dan Teninty wrote: Robert, The best I can do is point you in the direction of IEC 479-1 which is by now IEC 600479. The title is Effects of current passing through the human body. The electrical model for the human body is derived from this information. There is a good description of this in Annex A of ANSI/ISA S82.01-1994 which is harmonized, more or less identical to, UL 3111. Best regards, Daniel E. Teninty, P.E. Managing Partner DTEC Associates LLC http://www.dtec-associates.com Streamlining the Compliance Process 5406 S. Glendora Drive Spokane, WA 99223 (509) 443-0215 (509) 443-0181 fax -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Robert Macy Sent: Thursday, September 13, 2001 5:08 PM To: emc-p...@ieee.org Subject: Need electrical characteristics of epidermis (skin) Sorry to post here but am running into a brick wall at trying to find out something as simple as the resistivity and dielectric constant for skin! Does anybody have a source? Need quick, please. - Robert - --- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. -- Andrew Carson - Product Safety Engineer, Xyratex, UK Phone: +44 (0)23 9249 6855 Fax: +44 (0)23 9249 6014 --- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Need electrical characteristics of epidermis (skin)
Sorry to post here but am running into a brick wall at trying to find out something as simple as the resistivity and dielectric constant for skin! Does anybody have a source? Need quick, please. - Robert - Hi Robert: The skin resistivity and dielectric constant is NOT simple. My reference is Reilly, Applied Bioelectricity from Electrical Stimulation to Electropathology. Resistivity varies with body location; wet/dry; electrode contact area; electrode contact perimeter; uniformity of current distribution below the contact; the kind of tissue below the skin (muscle, fat); thickness of the corneum (outermost layer of dead skin cells); duration of current; activity of sweat ducts; etc. Having said this, here are some resistivity values in kilohm-centimeters-squared for dry contacts: Arm dc 100-1,000 Arm 1.5-10 Hz 600-1,200 Fingertip 0-1 Hz 120-130 Palm30-65 Hz60-80 While Reilly has information on skin capacitance, he has no information on dielectric constant. Best regards, Rich --- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Need electrical characteristics of epidermis (skin)
Robert, Try this web site: http://speech.llnl.gov/thesis/index.htm It's a good starting point regarding the skin. Richard Georgerian Technical Committee 8 Product Safety (TC-8), Vice-chair Colorado Product Safety Technical Committee (CPSTC), Chair Compliance Engineer Carrier Access Corporation 5395 Pearl Parkway Boulder, CO 80301 Tele: 303-218-5748 Fax: 303-218-5503 mailto:rgeorger...@carrieraccess.com -Original Message- From: Robert Macy [mailto:m...@california.com] Sent: Thursday, September 13, 2001 6:08 PM To: emc-p...@ieee.org Subject: Need electrical characteristics of epidermis (skin) Sorry to post here but am running into a brick wall at trying to find out something as simple as the resistivity and dielectric constant for skin! Does anybody have a source? Need quick, please. - Robert - --- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. * This e-mail transmission, and any documents, files, or previous e-mail messages attached to it may contain information that is confidential or legally privileged. If you are not the intended recipient, or a person responsible for delivering it to the intended recipient, you are hereby notified that you must not read this transmission and that any disclosure, copying, printing, distribution, or use of any of the information contained in or attached to this transmission is strictly prohibited. If you have received this transmission in error, please immediately notify the sender by telephone or return e-mail and delete the original transmission and its attachments without reading or saving them in any manner. Thank you. * --- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Need electrical characteristics of epidermis (skin)
Robert, The best I can do is point you in the direction of IEC 479-1 which is by now IEC 600479. The title is Effects of current passing through the human body. The electrical model for the human body is derived from this information. There is a good description of this in Annex A of ANSI/ISA S82.01-1994 which is harmonized, more or less identical to, UL 3111. Best regards, Daniel E. Teninty, P.E. Managing Partner DTEC Associates LLC http://www.dtec-associates.com Streamlining the Compliance Process 5406 S. Glendora Drive Spokane, WA 99223 (509) 443-0215 (509) 443-0181 fax -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Robert Macy Sent: Thursday, September 13, 2001 5:08 PM To: emc-p...@ieee.org Subject: Need electrical characteristics of epidermis (skin) Sorry to post here but am running into a brick wall at trying to find out something as simple as the resistivity and dielectric constant for skin! Does anybody have a source? Need quick, please. - Robert - --- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
Need electrical characteristics of epidermis (skin)
Sorry to post here but am running into a brick wall at trying to find out something as simple as the resistivity and dielectric constant for skin! Does anybody have a source? Need quick, please. - Robert - --- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
