860 mbar is 25.3958 inches of Hg. Atmospheric pressure (in the range we care about) falls at about 1 inch of Hg per 1000 feet. Thus, if standard atmospheric pressure is 29.92 inches of Hg, this would equate to about 4525 feet altitude. That’s “feet”, not “meters”. Even Denver would be too high for a lab to qualify to test ESD to IEC 61000-4-2.
From: John Woodgate <[email protected]> Sent: Thursday, July 29, 2021 10:26 AM To: [email protected] Subject: Re: [PSES] Climatic conditions for ESD testing That explains it: they want to be able to do the tests in La Paz. (;-) ====================================================================================== Best wishes John Woodgate OOO-Own Opinions Only www.woodjohn.uk <http://www.woodjohn.uk> Rayleigh, Essex UK Istae nunc praetereunt nisi non ubicumque On 2021-07-29 17:49, Charlie Blackham wrote: EN 61000-4-2 specifies a minimum air pressure of 860 mbar but, 1. 920 mbar is the centre of a cat 5 hurricane at sea level 2. 860 mbar is about 4500m above sea level Hardly the most rigorous set of criteria ever written into a standard 😊 Best regards Charlie Charlie Blackham Sulis Consultants Ltd Tel: +44 (0)7946 624317 Web: <https://sulisconsultants.com/> https://sulisconsultants.com/ Registered in England and Wales, number 05466247 _____ <https://www.avg.com/internet-security> This email has been checked for viruses by AVG antivirus software. www.avg.com <https://www.avg.com/internet-security> - ---------------------------------------------------------------- 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 <[email protected] <mailto:[email protected]> > 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) <http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected] <mailto:[email protected]> > Mike Cantwell <[email protected] <mailto:[email protected]> > For policy questions, send mail to: Jim Bacher <[email protected] <mailto:[email protected]> > David Heald <[email protected] <mailto:[email protected]> > - ---------------------------------------------------------------- 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 <[email protected]> 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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
