That was back in the day of continuous analog transmissions. Today it's digital, P-25? packets of info in brief little bursts, thus the need for peak reading meter. So far the limits are related to average readings since it's based on heating effects. Tomorrow, (maybe already today??) there is a peak or instantaneous requirement? If I recall right, I'd get ~35 V/m very near to the antenna, just about where your head would be. -
Bill In the event of a national emergency, click on the following links to provide directions to your duly elected mis-representatives. http://www.usa.gov/Contact/Elected.shtml or... https://writerep.house.gov/writerep/wel ome.shtmlhttp://www.senate.gov/general/contact_information/senators_cfm.cfm if really desperate... http://www.usa.gov/Contact/Elected.shtml --- On Wed, 8/11/10, Larry Stillings <[email protected]> wrote: From: Larry Stillings <[email protected]> Subject: RE: [PSES] RI query To: "'Bill Owsley'" <[email protected]>, [email protected], "Doug Nix" <[email protected]> Cc: [email protected] Date: Wednesday, August 11, 2010, 12:42 PM In the hardware store, when those guys (firemen) would come in, we would use their radios to light up 4' fluorescent light bulbs. That was a long time ago, but it still made me wonder even back then ________________________________ From: Bill Owsley [mailto:[email protected]] Sent: Wednesday, August 11, 2010 12:27 PM To: [email protected]; Doug Nix Cc: [email protected] Subject: Re: [PSES] RI query Just for fun; take out your old trusty walky-talky, the ones used by firemen, police, medical, securty guards, etc. and a peak reading field meter. Put the meter reading head, about in the user position, somewhere near the antenna? And push to talk! What is that reading!!! - Bill In the event of a national emergency, click on the following links to provide directions to your duly elected mis-representatives. http://www.usa.gov/Contact/Elected.shtml or... https://writerep.house.gov/writerep/welcome.shtml http://www.senate.gov/general/contact_information/senators_cfm.cfm if really desperate... http://www.usa.gov/Contact/Elected.shtml --- On Wed, 8/11/10, Doug Nix <[email protected]> wrote: From: Doug Nix <[email protected]> Subject: Re: [PSES] RI query To: [email protected] Cc: [email protected] Date: Wednesday, August 11, 2010, 10:49 AM Although not specifically OSHA, you may also want to have a look at the ICNIRP guidelines. These are often considered to represent 'best practice' and are observed in many countries including Canada: Here is the link to the FREE 1998 Guidelines on EMF protection: http://www.icnirp.de/documents/emfgdl.pdf They also publish a FREE Guidance document for using the EMF Guidelines: http://www.icnirp.de/documents/use.htm This link goes to the FREE 2009 Guidelines on Static Magnetic Fields: http://www.icnirp.de/documents/statgdl.pdf http://www.icnirp.de/documents/philosophy.pdf Along with the International Labour Organization, ICNIRP has published a book on the protection of workers from RF fields: Protection of workers against radio-frequency and microwave radiation; A technical review. Geneva: International Labour Office; 1986. ISBN 92-2-105604-X/ISSN 0078-3129. Along with the WHO and the UN Environment Programme, ICNIRP has published Health Criteria for exposure to RF fields: Environmental Health Criteria 137: Electromagnetic Fields (300 Hz to 300 GHz). Geneva, World Health Organization; 1993. ISBN 92-4-157137-3. Regards, Doug Nix, A.Sc.T. IEEE Engineering & Human Environment Joint Chapter Toronto Section, Ontario, Canada http://ewh.ieee.org/r7/toronto/chapters/humanenv.htm [email protected] mobile (519) 729-5704 fax (519) 653-1318 Find me LinkedIn at http://www.linkedin.com/in/dougnix Fostering Technological Innovation and Excellence for the Benefit of Humanity. On 11-August-2010, at 08:28, Cortland Richmond wrote: Try the FCC! quote: OET Bulletin No. 65 (August 1997) Evaluating Compliance With FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields This revised OET Bulletin 65 has been prepared to provide assistance in determining whether proposed or existing transmitting facilities, operations or devices comply with limits for human exposure to radiofrequency (RF) fields adopted by the Federal Communications Commission (FCC). The bulletin offers guidelines and suggestions for evaluating compliance. However, it is not intended to establish mandatory procedures, and other methods and procedures may be acceptable if based on sound engineering practice. unquote LINK: http://www.fcc.gov/oet/info/documents/bulletins/ I made reference to it for some testing. Watch your duty cycle! Cortland Richmond KA5S ----- Original Message ----- From: Ron Pickard To: [email protected] Sent: 8/10/2010 9:23:00 PM Subject: RI query [SNIP] concern has been floating around here for some time about the hazards to a human being that would be in close proximity to the generated EMI of a radiated immunity test. With some products, manual operation manipulation is needed to exercise portions of the product during this testing, which is where this question originates. The concern here relates to the proliferation of cases associated with close proximity to humans and any legal/ perspectives due confining a human in fully shielded and/or anechoic chamber during this test. To that end and in the USA, does OSHA impose any restrictions with this particular type of testing? Are there any maximum permissible exposure limits for this testing environment? If so, at what field intensity(ies) will precautions need to be taken - ---------------------------------------------------------------- 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.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html 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]> - ---------------------------------------------------------------- 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.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html 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]> - ---------------------------------------------------------------- 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.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html 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]> - ---------------------------------------------------------------- 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.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html 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]> - 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.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html 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]>
