Re: LVD Essential Requirement for Radiation Protection
Ionizing radiation's MAIN effect is ionization of material it interacts with, i.e. it breaks molecular bonds, whereas nonionizing is any other kind of radiation. The classification is not physiological, does not refer to the human tissue, but matter in general. Some non-ionizing radiation can cause ionization, but only at very high intensities, and not as its prime effect. UV, RF, MW, ELF.. is hence non-ionizing radiation Neven Pischl - Original Message - From: Tony Firth tony.fi...@quester.com To: emc-p...@majordomo.ieee.org Sent: Thursday, January 13, 2000 4:12 PM Subject: re: LVD Essential Requirement for Radiation Protection Patrick, In general terms Non-Ionizing refers to emissions that do not cause damage to human tissue, (RF, Visible Light, ESD Ionization Generators, Etc.), whereas Ionizing covers emissions capable of causing damage to human tissue, presumably from gene damage, (X-Rays, High Level Beta, Gamma Radiation, Hi intensity UV, Etc.) I do not know at what level e.g. a Microwave Generator would transit from being Non-Ionizing to Ionizing, although my understanding is that it is still classified as being Non-Ionizing. And, of course, corona discharge Ionizing Generators, (that ionize the air around them by design), are classified as Non-Ionizing! Unfortunately do not have a precise physiological definition. Hope this helps. Tony Tony Firth, Elect.Eng., Quester Technology Inc., Fremont,CA 94539-7474 Patrick Lawler wrote: What does 'non-ioniozing emissions' cover? Is it in the category of personnel safety and low-frequency EMF, or does it encompass simple product emissions like those specified in CISPR 11? - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Re: LVD Essential Requirement for Radiation Protection
Patrick: I think you might find this definitive paragraph from the Canadian Broadcaster's Manual on Non Ionizing Radiation pertintent to your query and which complements other comments received: Radiation, Ionizing and Non Ionizing ... the energy in an electromagnetic wave increases with frequency. Around the ultraviolet range ( about 2 million Mhz) the energy is sufficient to dislodge captive electrons, resulting in charged particles (ions) dashing about with energies sufficient to break down or change atoms or molecular structures. At this point the energy wave is classed as ionizing radiation. Humans endure continuos natural low level ionizing radiation and regulations control occupational exposure to some 2.5 millirems per hour for x-rays; the American and Canadian standards for ultraviolet are based on a maximum exposure of one milliwatt per square centimeter . Visible light and infrared are controlled as well, at ten milliwatts per sq. cm. Excessive radiation at any frequency can be injurious to health. Limits do vary from country to country and Canada's Safety Code 6 is a guidline recently revised where exposure to EM radiation can occur. It applies to the general population as well as workers in the field. Copies are availabel in pdf format if needed. Ralph Cameron EMC Consultant and Suppression of Consumer Electronic Equipment ( After Sale) . - Original Message - From: Patrick Lawler plaw...@west.net To: emc-p...@majordomo.ieee.org Sent: Thursday, January 13, 2000 11:49 AM Subject: Re: LVD Essential Requirement for Radiation Protection What does 'non-ioniozing emissions' cover? Is it in the category of personnel safety and low-frequency EMF, or does it encompass simple product emissions like those specified in CISPR 11? On Wed, 12 Jan 2000 11:33:02 -0500, wo...@sensormatic.com wrote: An interesting thing has happened to the LVD. Until now, the radiation essential requirement of the LVD has been interpreted as referring to ionizing radiation and there are harmonized standards addressing that requirement, for example, EN 60950. That interpretation has now changed. In a draft mandate to CENELEC, CEN and ETSI, the Commission is now interpreting the radiation essential requirement of the LVD to include non-ionizing emissions and that the limits for the general public are to be per the Council's EMF Recommendation. The standards bodies are mandated to produce basic and product standards that would apply to the LV and RTTE Directives. There are no worker limits promulgated at the EU level. Which leads me to my question. When would this new interpretation of the essential requirement take effect - now or the DOW of the associated standard? -- Patrick Lawler plaw...@west.net - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Re: LVD Essential Requirement for Radiation Protection
What does 'non-ioniozing emissions' cover? Is it in the category of personnel safety and low-frequency EMF, or does it encompass simple product emissions like those specified in CISPR 11? On Wed, 12 Jan 2000 11:33:02 -0500, wo...@sensormatic.com wrote: An interesting thing has happened to the LVD. Until now, the radiation essential requirement of the LVD has been interpreted as referring to ionizing radiation and there are harmonized standards addressing that requirement, for example, EN 60950. That interpretation has now changed. In a draft mandate to CENELEC, CEN and ETSI, the Commission is now interpreting the radiation essential requirement of the LVD to include non-ionizing emissions and that the limits for the general public are to be per the Council's EMF Recommendation. The standards bodies are mandated to produce basic and product standards that would apply to the LV and RTTE Directives. There are no worker limits promulgated at the EU level. Which leads me to my question. When would this new interpretation of the essential requirement take effect - now or the DOW of the associated standard? -- Patrick Lawler plaw...@west.net - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: LVD Essential Requirement for Radiation Protection
Generally, non-ionizing emissions are electromagnetic fields from 0-300 GHz - i.e., from static fields up to light frequencies. The concern is with human exposure and not emissions. Thus, spurious emissions would not normally be of concern, but intentional emissions could be. Potential sources would include * static fields (e.g., magnets and dc loops) * magnetic fields from loops (e.g., degausers and motors) * electric fields from high voltage devices (e.g., monitors) * radio transmitter antennas Richard Woods -- From: Patrick Lawler [SMTP:plaw...@west.net] Sent: Thursday, January 13, 2000 11:49 AM To: emc-p...@majordomo.ieee.org Subject: Re: LVD Essential Requirement for Radiation Protection What does 'non-ioniozing emissions' cover? Is it in the category of personnel safety and low-frequency EMF, or does it encompass simple product emissions like those specified in CISPR 11? On Wed, 12 Jan 2000 11:33:02 -0500, wo...@sensormatic.com wrote: An interesting thing has happened to the LVD. Until now, the radiation essential requirement of the LVD has been interpreted as referring to ionizing radiation and there are harmonized standards addressing that requirement, for example, EN 60950. That interpretation has now changed. In a draft mandate to CENELEC, CEN and ETSI, the Commission is now interpreting the radiation essential requirement of the LVD to include non-ionizing emissions and that the limits for the general public are to be per the Council's EMF Recommendation. The standards bodies are mandated to produce basic and product standards that would apply to the LV and RTTE Directives. There are no worker limits promulgated at the EU level. Which leads me to my question. When would this new interpretation of the essential requirement take effect - now or the DOW of the associated standard? -- Patrick Lawler plaw...@west.net - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: LVD Essential Requirement for Radiation Protection
Non-ionizing emissions cover about everything from DC to daylight. It refers to emissions with insufficient energy to ionize atoms by stripping away electrons. Ionizing radiation, such as X rays and gamma rays, have enough energy to ionize atoms. Bad stuff in large enough doses. Ghery Pettit Intel -Original Message- From: Patrick Lawler [mailto:plaw...@west.net] Sent: Thursday, January 13, 2000 8:49 AM To: emc-p...@majordomo.ieee.org Subject: Re: LVD Essential Requirement for Radiation Protection What does 'non-ioniozing emissions' cover? Is it in the category of personnel safety and low-frequency EMF, or does it encompass simple product emissions like those specified in CISPR 11? On Wed, 12 Jan 2000 11:33:02 -0500, wo...@sensormatic.com wrote: An interesting thing has happened to the LVD. Until now, the radiation essential requirement of the LVD has been interpreted as referring to ionizing radiation and there are harmonized standards addressing that requirement, for example, EN 60950. That interpretation has now changed. In a draft mandate to CENELEC, CEN and ETSI, the Commission is now interpreting the radiation essential requirement of the LVD to include non-ionizing emissions and that the limits for the general public are to be per the Council's EMF Recommendation. The standards bodies are mandated to produce basic and product standards that would apply to the LV and RTTE Directives. There are no worker limits promulgated at the EU level. Which leads me to my question. When would this new interpretation of the essential requirement take effect - now or the DOW of the associated standard? -- Patrick Lawler plaw...@west.net - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
