English Language Translations of NOM standards
Greetings , Can anyone in the forum suggest a definite (and reputable) source where accurate English translations of NOM standards can be purchased? Regards, Kaz Gawrzyjal kazimier_gawrzy...@dell.com --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
RTTE Directive
Hello group, I have been reading through different articles on the RTTE Directive and getting somewhat confused. I have concluded that there is no requirement for an authorized representative within the Community any longer. This may have been the case all along, but it was good to have that person to submit the technical files to a notified body. I believe the notified body requirement goes away with the RTTE directive also. Now all that is required is for the manufacturer to maintain the technical file and produce the Declaration of Conformity. Am I on the right page? Thanks, Courtland Thomas Patton Electronics --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
RE: RTTE Directive
Courtland, Assuming all of the standards that apply to your equipment are harmonised, you are correct there is no need for a Notified Body. Not a bad idea however to have them do your testing. As far as the authorized representative within the community, I have long believed that this was not necessary. In fact the RTTE and the EMC directive use the same language: Where neither the mfg. nor his authorized representative is established within the community, the obligation to keep the DoC and the technical documentation at the disposal of the competent authority shall be the responsibility of the person who places the product on the Community market. 9 times out of 10 that person will be the mfg. or the authorized rep, but clearly, it does not have to be. ~ Sam Wismer Lead Regulatory Engineer/ Radio Approvals Engineer LXE, Inc. (770) 447-4224 Ext. 3654 Visit Our Website at: http://www.lxe.com -Original Message- From: Courtland Thomas [mailto:ctho...@patton.com] Sent: Tuesday, February 27, 2001 5:07 PM To: emcpost Subject: RTTE Directive Hello group, I have been reading through different articles on the RTTE Directive and getting somewhat confused. I have concluded that there is no requirement for an authorized representative within the Community any longer. This may have been the case all along, but it was good to have that person to submit the technical files to a notified body. I believe the notified body requirement goes away with the RTTE directive also. Now all that is required is for the manufacturer to maintain the technical file and produce the Declaration of Conformity. Am I on the right page? Thanks, Courtland Thomas Patton Electronics --- 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: http://www.rcic.com/ click on Virtual Conference Hall, --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
RE: RTTE Directive
A representative is necessary if the manufacture is not resident in the EU. That entity keeps the technical file and performs any other duties expressly assigned by the manufacturer. This procedure is not related to any procedural requirements to use or not use a Notified Body. A Notified Body is needed if Annex III, IV or V applies. For example, our product is a short range device where the spectrum standard has not been published; so we must follow Annex IV and use a Notified Body. However, once the standard is harmonized, we will switch to following Annex III and a Notified Body will not be required. Richard Woods -- From: Courtland Thomas [SMTP:ctho...@patton.com] Sent: Tuesday, February 27, 2001 5:07 PM To: emcpost Subject: RTTE Directive Hello group, I have been reading through different articles on the RTTE Directive and getting somewhat confused. I have concluded that there is no requirement for an authorized representative within the Community any longer. This may have been the case all along, but it was good to have that person to submit the technical files to a notified body. I believe the notified body requirement goes away with the RTTE directive also. Now all that is required is for the manufacturer to maintain the technical file and produce the Declaration of Conformity. Am I on the right page? Thanks, Courtland Thomas Patton Electronics --- 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: http://www.rcic.com/ click on Virtual Conference Hall, --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
Re: DoC
EDFA411E5E4AD2118D6F00A0C99E4BAC01DF797E@FLBOCEXU02, wo...@sensormatic.com inimitably wrote: Companies A and B are located in the EU. Company A manufacturers a product and applies the name of Company B. Company B sells the product to a customer and the product is shipped from Company A direct to the customer. Which company is responsible for the technical file and issuing the DoC? Company A is the manufacturer and is responsible. Company B may be just a sales unit with insufficient technical knowledge to know whether the DoC is honest or not. But Company A need not put its own name on the DoC. The rules about that vary a bit from one country to another, so the authorities should be contacted. -- Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839 Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Foxhunters suffer from tallyhosis. PLEASE do not mail copies of newsgroup posts to me. --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
Re: Harmonics -- WSJ opinion.
200102271645.iaa00...@epgc196.sdd.hp.com, Rich Nute ri...@sdd.hp.com inimitably wrote: Of course, no one has shown that unacceptable overheating will actually occur. Do you have any more such gems to contribute? What do you think happens to the total current through a capacitor when the applied voltage contains harmonics? What happens to the I^2R loss and the dielectric loss? What happens to hysteresis loss in motors and transformers? My assertion is based on the original reason for the harmonic current emission standard, not the general case for problems caused by harmonic currents. I apologize for writing in such a way as to confuse the general case of overheating due to harmonic currents with the specific case of overheating in distribution transformers. My recollection of the original reason for the harmonic current standard was to prevent overheating of distribution transformers on the public power network. I have not heard that explanation put forward since 1991 by any electricity supply industry (ESI) expert on the IEC or the BSI committee. It is also not mentioned in the original rationale, Annex A to IEC 77A/164/CD (committee document, not in the public domain). But there must be increased hysteresis loss. Perhaps you can correct this recollection. If this is not correct, then kindly disregard the following remarks. Based on my probably incorrect recollection, my assertion is that no distribution transformer in the public power network has failed due to harmonic current. I strongly suspect that that is not true in UK. There were many failures (some explosive) due to d.c. in the windings before we stopped using half-wave rectifiers in TV sets. I don't know about the situation from 1970 onwards: there have been failures but no specific cases undoubtedly due to harmonics have been cited by our ESI experts. I further recall that such failures were a prediction based on the expected proliferation of products with full-wave rectifiers, especially SMPS. The electric power distribution representatives to the committee predicted massive distribution transformer failures due to harmonic currents by the year 2000 or thereabouts. Therefore, the committee operated with a high sense of urgency. Perhaps you can correct me on this recollection. You are correct, I think, about that, and I have said previously that the early predictions were pessimistic. Nevertheless, here I have about 3.5% voltage waveform distortion, in a residential area, which is more than I would like. The ESI has also been working under a threat from the Commission to impose 'quality of supply' requirements on it, since electricity is a commodity that should have quality requirements (see EN50160). This has made the industry VERY fearful of draconian fines being imposed for outages, and harmonics can be one cause that is avoidable, unlike severe weather. Can you tell us whether, at the time the work on the standard was initiated, any such transformers had indeed failed due to harmonic current overheating? Or, have any such transformers failed due to harmonic current since the work has been undertaken? See above. But I don't think transformers are the big issue. In Europe, the MV network tends to be resonant at about 250 Hz - the fifth harmonic. The ESI has to be very careful that this does not result in over-voltage, because if an MV network fails, a large area is affected. The design of the European distribution networks makes them far less tolerant of harmonic currents that either the US or Japanese networks. This has only quite recently been demonstrated to the IEC committee: the evidence from outside Europe was not submitted previously. Capacitors and motors are the other things that are said to be particularly vulnerable. -- Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839 Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Foxhunters suffer from tallyhosis. PLEASE do not mail copies of newsgroup posts to me. --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
RE: Air Flow Meters
I have a Kurz, model 441s hot wire probe unit. Refer to http://www.kurz-instruments.com/ Regards, Peter L. Tarver, PE Product Safety Manager Sanmina Homologation Services peter.tar...@sanmina.com -Original Message- From: Kurt Mikolajewski [mailto:kmiko...@catena.com] Sent: Monday, February 26, 2001 7:02 AM To: 'Joe Finlayson'; 'EMC PSTC' Subject: RE: Air Flow Meters Joe, One product I have found that uses wire probes is the ATM-24 from Cambridge AccuSence, Inc. Regards, Kurt Mikolajewski Catena Networks Voice: (613) 599-6430, x8551 Voice (Internal):8551 Email: kmiko...@catena.com -Original Message- From: Joe Finlayson [mailto:jfinlay...@telica.com] Sent: Friday, February 23, 2001 4:03 PM To: 'EMC PSTC'; 'NEBS Newsgroup' Subject: RE: Air Flow Meters OK, thanks for all the replies. It appears I am in search of a Hot Wire Anemometer. I've found several on the web, but all seem to use a telescoping probe for measurement, probably for air ducts. Does anyone know of a model that uses a wire for measurement so I can affix it to a modular plug in card, thus sealing the chassis. My goal is to measure air flow rates in each of 21 slots while the cards are installed (thus sealing the chassis for realistic air flow). Thx, Joe -Original Message- From: Joe Finlayson Sent: Friday, February 23, 2001 8:41 AM To: 'EMC PSTC'; 'NEBS Newsgroup' Subject:Air Flow Meters I'm interested in doing an air flow analysis on a per-slot basis for a modular chassis. Can anyone share their experience in using their favorite test tools for this function. One of my colleagues had mentioned that he recalls the use of a thermocouple-type lead that was used at his previous place of employment that measured air flow. Any knowledge of this type of product would be greatly appreciated as well. Thx, Joe * OLE Object: Picture (Metafile) Joe Finlayson Manager, Compliance Engineering Telica, Inc. 734 Forest Street, Bldg. G, Suite 100 Marlboro, MA 01752 Tel:(508) 804-8212 Fax:(508) 480-0922 Email: jfinlay...@telica.com Web:www.telica.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
RE: Harmonics -- WSJ opinion.
John, in response to your attached thread you may want to review some of the field surveys that are available from the Low Frequency Emissions Industry Coalition (LFEIC) @ http://www.eiafoundation.org/eng/lfeic/docpublic/default.htm. Regards. --- Ed Jones IBM Corporation Somers N.Y. -- Forwarded by Edward Jones/Somers/IBM on 02/27/2001 02:12 PM --- John Juhasz jjuh...@fiberoptions.com@ieee.org on 02/26/2001 01:36:30 PM Please respond to John Juhasz jjuh...@fiberoptions.com Sent by: owner-emc-p...@ieee.org To: 'Rich Nute' ri...@sdd.hp.com, emc-p...@majordomo.ieee.org cc: Subject: RE: Harmonics -- WSJ opinion. Rich, I would think that you knew that this would generate discussion? One comment of Mr Hunter's that stood out in particular was the very last . . . . . . the only ones who benefit from the harmonic current emission standard are the European electricity distributors. They avoid investments in bolstering their networks against the theoretical harmonics risk at the cost of manufacturers and consumers. I would say that this senitment has been echoed by many compliance engineers. But the comment is 'non-technical' . . . can anyone in this forum offer any 'technical' arguments that would a)Back-up such a statement as Mr. Hunter's or b) FAVOR the harmonic standard? I like to give the benefit of the doubt that the standard was created based on sound technical evidence. John Juhasz Fiber Options Bohemia, NY -Original Message- From: Rich Nute [mailto:ri...@sdd.hp.com] Sent: Monday, February 26, 2001 12:11 PM To: emc-p...@majordomo.ieee.org Subject: Harmonics -- WSJ opinion. With thanks to Ed Jones... On Thusday, February 22, The Wall Street Journal Europe published an interesting opinion on the harmonic current emissions standard. The opinion is by Rob Hunter, a lawyer and Chairman of the Centre for the New Europe, a Brussels-based think tank. Mr. Hunter is quite critical of the EU New Approach process. He says: In this procedure, the EU sets vague safety and technical rules for everything from toys to super- computers -- for example, toys shall be 'safe.' The EU then delegates to private standardization bodies the drafting of detailed requirements explaining what the delphic rules mean. The supposed advantage of this New Approach is twofold. For industry, it gets to write the detailed rules applying to it. For the Commission, the New Approach frees it from a burdenom task; it also allows the Commission to claim that it has nothing to do with writing the standards, and hence cannot be held responsible. All this sounds quite above-board. It isn't. For one thing, the standards are not merelay a means of proving compliance with the underlying legislation. They actually determine the meaning of the law itself. Mr. Hunter discusses ...the way these standard-setting bodies can be gamed by industry insiders for advantage. Mr. Hunter goes on to show how the New Approach process allows the Commission to sidestep ...WTO laws prohibiting 'mandatory' product measures that create 'unnecessary obstacles' to international trade. Mr. Hunter's opinion goes on to show that the only ones who benefit from the harmonic current emission standard are the European electricity distributors. They avoid investments in bolstering their networks against the theoretical harmonics risk at the cost of manufacturers and consumers. 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 Heald davehe...@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: http://www.rcic.com/ click on Virtual Conference Hall, --- 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
RE: Calibration of test equipment
As soon as a reference device goes out into the general lab population, it's subject to physical and electrical abuse. It may take you quite a while to notice that some device has just one attenuator range that's damaged (but not completely blown, just shifted a bit). As far as I'm concerned, once a device hits the general lab population, it's no more reliable than anything else out there. (Although I may put a bit more faith in the most recently calibrated item, simply since it's likely to have had the least exposure to trouble.) Regards, Ed Another P.O.V. : Anecdotal experience: at the last three companies I've worked, the biggest single source of test equipment/instrumentation failure has been directly from the Calibration Process. When a fully functional instrument is submitted for calibration, and a device is returned that has no (or severly decreased functionality), it valid to assume that the calibration process does not always insure measurement integrity, nor add value to the development lab receiving the calibration services. It serves The Process (ISO 9k-speak). Brian O'Connell Taiyo Yuden (USA), Inc. --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
Re: Harmonics -- WSJ opinion.
Hi John: Of course, no one has shown that unacceptable overheating will actually occur. Do you have any more such gems to contribute? What do you think happens to the total current through a capacitor when the applied voltage contains harmonics? What happens to the I^2R loss and the dielectric loss? What happens to hysteresis loss in motors and transformers? My assertion is based on the original reason for the harmonic current emission standard, not the general case for problems caused by harmonic currents. I apologize for writing in such a way as to confuse the general case of overheating due to harmonic currents with the specific case of overheating in distribution transformers. My recollection of the original reason for the harmonic current standard was to prevent overheating of distribution transformers on the public power network. Perhaps you can correct this recollection. If this is not correct, then kindly disregard the following remarks. Based on my probably incorrect recollection, my assertion is that no distribution transformer in the public power network has failed due to harmonic current. I further recall that such failures were a prediction based on the expected proliferation of products with full-wave rectifiers, especially SMPS. The electric power distribution representatives to the committee predicted massive distribution transformer failures due to harmonic currents by the year 2000 or thereabouts. Therefore, the committee operated with a high sense of urgency. Perhaps you can correct me on this recollection. Can you tell us whether, at the time the work on the standard was initiated, any such transformers had indeed failed due to harmonic current overheating? Or, have any such transformers failed due to harmonic current since the work has been undertaken? 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: http://www.rcic.com/ click on Virtual Conference Hall,
Re: Harmonics -- WSJ opinion.
Years ago Digital Equipment Corporation had problems with power distribution in office module systems. As I recall, it was a combination of phase balancing of loads and harmonic currents in the neutral. A module system which distributed three phase 5 wire power and indicated the phase connection with a number on each receptacle was designed specifically for DEC by the module manufacturer and later put on the general market. I don't know who made the system and couldn't tell you how to contact anyone involved. I was also aware of some transformers at DEC which were damaged by third harmonic currents. A periodic maintenance inspection program was put in place to monitor transformer delta and phase currents. They also did periodic thermal imaging of circuit breaker panels as part of this program, but I don't believe that was due to harmonic currents. My first experience with third harmonics was with mercury vapor lighting fixtures which were connected phase to phase. High currents circulating in the delta connected load overheated the ballast windings. One way of protecting transformers (and neutral wiring) from odd harmonic currents is to use four pole breakers, with the fourth pole in series with the delta, or in the neutral of the wye. Gary McInturff wrote: Years ago when switch mode power supplies were really first being introduced, we had a number of them installed in cubicles in a new building. We were the first occupants. We started having a rash of fires that were starting in the outlet receptacles in the cubicles. The building management teams went looking for the causes and we found no imbalance in the power distribution etc. The world looked good to them. Still the fires continued (quickly extinguished at the source mind you so they never spread) but it was observed that those offices that were have a problem all had the equipment with the switch mode supplies, and we quickly shuffled those around and the fires quit. Neither the building engineers or we EE's had any clue about harmonics on problems with these so that wasn't looked at and I can't say for certain that was the reason, but after shifting the load of the switch mode supplies around on different branch circuits the problem stopped. So I certainly have my suspicions. Gary -Original Message[Gary McInturff] ut - From: John Juhasz [mailto:jjuh...@fiberoptions.com] Sent: Monday, February 26, 2001 10:37 AM To: 'Rich Nute'; emc-p...@majordomo.ieee.org Subject: RE: Harmonics -- WSJ opinion. Rich, I would think that you knew that this would generate discussion? One comment of Mr Hunter's that stood out in particular was the very last . . . . . . the only ones who benefit from the harmonic current emission standard are the European electricity distributors. They avoid investments in bolstering their networks against the theoretical harmonics risk at the cost of manufacturers and consumers. I would say that this senitment has been echoed by many compliance engineers. But the comment is 'non-technical' . . . can anyone in this forum offer any 'technical' arguments that would a)Back-up such a statement as Mr. Hunter's or b) FAVOR the harmonic standard? I like to give the benefit of the doubt that the standard was created based on sound technical evidence. John Juhasz Fiber Options Bohemia, NY -Original Message- From: Rich Nute [mailto:ri...@sdd.hp.com] Sent: Monday, February 26, 2001 12:11 PM To: emc-p...@majordomo.ieee.org Subject: Harmonics -- WSJ opinion. With thanks to Ed Jones... On Thusday, February 22, The Wall Street Journal Europe published an interesting opinion on the harmonic current emissions standard. The opinion is by Rob Hunter, a lawyer and Chairman of the Centre for the New Europe, a Brussels-based think tank. Mr. Hunter is quite critical of the EU New Approach process. He says: In this procedure, the EU sets vague safety and technical rules for everything from toys to super- computers -- for example, toys shall be 'safe.' The EU then delegates to private standardization bodies the drafting of detailed requirements explaining what the delphic rules mean. The supposed advantage of this New Approach is twofold. For industry, it gets to write the detailed rules applying to it. For the Commission, the New Approach frees it from a burdenom task; it also allows the Commission to claim that it has nothing to do with writing the standards, and hence cannot be held responsible. All this sounds quite above-board. It isn't. For one thing, the standards are not merelay a means of proving
RE: Calibration of test equipment
-Original Message- From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: Monday, February 26, 2001 1:52 PM To: Jon D. Curtis Cc: Flinders, Randall; michael.sundst...@nokia.com; c...@prodigy.net; brian.harl...@vgscientific.com; emc-p...@ieee.org Subject: Re: Calibration of test equipment 3a9aa4c8.3df94...@curtis-straus.com, Jon D. Curtis jdc@curtis- straus.com wrote: I personally think this interpretation is overly severe, but we comply with it because we want our test reports to be accepted by authorities who think this process is reasonable. You are effectively succumbing to technological blackmail, and making resistance to such nonsense that much more difficult for others. I suppose the idea is that the calibrated equipment might catch an 'uncalibrating' infection from other equipment. (;-) -- Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839 Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Foxhunters suffer from tallyhosis. PLEASE do not mail copies of newsgroup posts to me. --- John: Actually, the infection model isn't all that strange. I have had the unfortunate experience of having damaged an RF signal generator by connecting it into a power splitting network while also applying RF power to another port of that network. It served as a good reminder that you have to always watch were the power really flows, as well as where it's supposed to flow. As soon as a reference device goes out into the general lab population, it's subject to physical and electrical abuse. It may take you quite a while to notice that some device has just one attenuator range that's damaged (but not completely blown, just shifted a bit). As far as I'm concerned, once a device hits the general lab population, it's no more reliable than anything else out there. (Although I may put a bit more faith in the most recently calibrated item, simply since it's likely to have had the least exposure to trouble.) Regards, Ed Ed Price ed.pr...@cubic.com Electromagnetic Compatibility Lab Cubic Defense Systems San Diego, CA. USA 858-505-2780 (Voice) 858-505-1583 (Fax) Military Avionics EMC Services Is Our Specialty Shake-Bake-Shock - Metrology - Reliability Analysis --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
RE: Harmonics -- WSJ opinion.
Years ago when switch mode power supplies were really first being introduced, we had a number of them installed in cubicles in a new building. We were the first occupants. We started having a rash of fires that were starting in the outlet receptacles in the cubicles. The building management teams went looking for the causes and we found no imbalance in the power distribution etc. The world looked good to them. Still the fires continued (quickly extinguished at the source mind you so they never spread) but it was observed that those offices that were have a problem all had the equipment with the switch mode supplies, and we quickly shuffled those around and the fires quit. Neither the building engineers or we EE's had any clue about harmonics on problems with these so that wasn't looked at and I can't say for certain that was the reason, but after shifting the load of the switch mode supplies around on different branch circuits the problem stopped. So I certainly have my suspicions. Gary -Original Message[Gary McInturff] ut - From: John Juhasz [mailto:jjuh...@fiberoptions.com] Sent: Monday, February 26, 2001 10:37 AM To: 'Rich Nute'; emc-p...@majordomo.ieee.org Subject: RE: Harmonics -- WSJ opinion. Rich, I would think that you knew that this would generate discussion? One comment of Mr Hunter's that stood out in particular was the very last . . . . . . the only ones who benefit from the harmonic current emission standard are the European electricity distributors. They avoid investments in bolstering their networks against the theoretical harmonics risk at the cost of manufacturers and consumers. I would say that this senitment has been echoed by many compliance engineers. But the comment is 'non-technical' . . . can anyone in this forum offer any 'technical' arguments that would a)Back-up such a statement as Mr. Hunter's or b) FAVOR the harmonic standard? I like to give the benefit of the doubt that the standard was created based on sound technical evidence. John Juhasz Fiber Options Bohemia, NY -Original Message- From: Rich Nute [ mailto:ri...@sdd.hp.com mailto:ri...@sdd.hp.com ] Sent: Monday, February 26, 2001 12:11 PM To: emc-p...@majordomo.ieee.org Subject: Harmonics -- WSJ opinion. With thanks to Ed Jones... On Thusday, February 22, The Wall Street Journal Europe published an interesting opinion on the harmonic current emissions standard. The opinion is by Rob Hunter, a lawyer and Chairman of the Centre for the New Europe, a Brussels-based think tank. Mr. Hunter is quite critical of the EU New Approach process. He says: In this procedure, the EU sets vague safety and technical rules for everything from toys to super- computers -- for example, toys shall be 'safe.' The EU then delegates to private standardization bodies the drafting of detailed requirements explaining what the delphic rules mean. The supposed advantage of this New Approach is twofold. For industry, it gets to write the detailed rules applying to it. For the Commission, the New Approach frees it from a burdenom task; it also allows the Commission to claim that it has nothing to do with writing the standards, and hence cannot be held responsible. All this sounds quite above-board. It isn't. For one thing, the standards are not merelay a means of proving compliance with the underlying legislation. They actually determine the meaning of the law itself. Mr. Hunter discusses ...the way these standard-setting bodies can be gamed by industry insiders for advantage. Mr. Hunter goes on to show how the New Approach process allows the Commission to sidestep ...WTO laws prohibiting 'mandatory' product measures that create 'unnecessary obstacles' to international trade. Mr. Hunter's opinion goes on to show that the only ones who benefit from the harmonic current emission standard are the European electricity distributors. They avoid investments in bolstering their networks against the theoretical harmonics risk at the cost of manufacturers and consumers. 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/ 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: http://www.rcic.com/ http://www.rcic.com/ click on Virtual
RE: Calibration of test equipment
Regarding Jon's last comments about the use of un-calibrated equipment. CDS has an internal Metrology department which handles almost all of my periodic calibration (I send out my antennas, current probes LISN's). Every year, we have a long discussion about their need to minimize calibration costs. (I have to provide them with a budget to cover all of my predicted calibration costs.) One thing I have done to minimize costs is to put all of my power supplies, amplifiers, pulse generators and function generators on a No Periodic Calibration; User Verified status. My rationale is that I never trusted these devices to actually create what you set them for, so I always use a calibrated DMM or oscilloscope to verify and monitor any settings. (All of this NPC equipment carries a bright label warning of its status.) Of course, I still keep all oscilloscopes, meters, spectrum analyzers, measurement pre-amps, attenuators and probes on normal periodic calibration. I also keep any signal sweepers, signal generators and AF/RF synthesizers also on calibration, since I like to be able to use them stand-alone for some testing. Also, having calibrated RF signal sources allows me to informally cross-check my meters and analyzers. Using this system, I have moved from 100% calibrated equipment to only about 30% calibrated equipment. Considering that I have about 300 capital equipment items, this has resulted in a pretty decent cost reduction in the past few years. Regards, Ed Ed Price ed.pr...@cubic.com Electromagnetic Compatibility Lab Cubic Defense Systems San Diego, CA. USA 858-505-2780 (Voice) 858-505-1583 (Fax) Military Avionics EMC Services Is Our Specialty Shake-Bake-Shock - Metrology - Reliability Analysis -Original Message- From: Jon D. Curtis [mailto:j...@curtis-straus.com] Sent: Monday, February 26, 2001 10:48 AM To: Flinders, Randall Cc: michael.sundst...@nokia.com; c...@prodigy.net; brian.harl...@vgscientific.com; emc-p...@ieee.org Subject: Re: Calibration of test equipment As I understand it the interpretation to have tracibility to your national authority through equipment used only for calibration originated with NAMAS. Some other accreditors have picked it up since then. The requirement need not be that onerous. You can calibrate your own equipment traceably to your national authority using equipment that you send out for calibration. Where the instrument is cheap (multimeter) we buy an extra and use it only for calibration. Where it is expensive (oscope, receiver), we use it for calibration only directly after it returns from outside calibration (or inside tracible cal) and after we have calibrated our secondary equipment with it we put it into regular service for the year. If you manage your yearly calibration cycle well this shouldn't crimp your style too much. The key is not to have equipment in your calibration chain back to the national authority that has been used for non-calibration purposes between the time of its calibration and that of the secondary calibration. The idea is to have high confidence that the tracibilty chain is intact. If a piece of equipment in the chain has been used daily in regular rough and tumble testing it is seen as having a much higher probability of operating outside of its tolerances. In my experience the outside cal houses are pretty tough on their gear too, so I am not sure that much is gained. I personally think this interpretation is overly severe, but we comply with it because we want our test reports to be accepted by authorities who think this process is reasonable. To directly answer your specific question about a signal generator used in immunity: If it is being used as an uncalibrated signal source in the measurement and you are using a power meter or receiver for tracibility then you can use that signal generator, even if it went off a cliff the day before. If you are relying on the calibrated output level that the signal generator says it is putting out, then you should not have used that instrument in non-calibration use since its last calibration. Jon. Flinders, Randall wrote: Does this mean that a signal generator that is used for Radiated Immunity testing should not be used to calibrate Pre-Amps and Cables? How about Antenna Calibration? Can you use the same receiver you use on the OATS to calibrate those? I know this is a common practice with Commercial Test Labs. Is there guidance as to what types of equipment can be used for both lab use and for the calibration of other equipment? michael.sundst...@nokia.com wrote: I think there is a special requirement to keep the calibration equipment separate from the EMC equipment. In other words the calibration equipment can only be used for the calibration process and not for testing EMC. Michael Sundstrom Product Test Technician EMC Nokia Mobile Phones, Dallas PCC * Email michael.sundst...@nokia.com % Desk (972) 374-1462
RE: DoC
Hi, For the Medical Directives and I am assuming, for the others, the manufacturer is the company who's name is on the product. In your example, Company B is responsible for the technical file and DoC. If they are basing their DoC on a technical file held by Company A, they should have contractual access to that information. Ned Ned Devine Program Manager III Entela, Inc. 3033 Madison Ave. SE Grand Rapids, MI 49548 Phone 616 248 9671 Fax 616 574 9752 e-mail ndev...@entela.com -Original Message- From: wo...@sensormatic.com [mailto:wo...@sensormatic.com] Sent: Tuesday, February 27, 2001 10:08 AM To: emc-p...@majordomo.ieee.org Subject: DoC Companies A and B are located in the EU. Company A manufacturers a product and applies the name of Company B. Company B sells the product to a customer and the product is shipped from Company A direct to the customer. Which company is responsible for the technical file and issuing the DoC? Richard Woods --- 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: http://www.rcic.com/ click on Virtual Conference Hall, --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
DoC
Companies A and B are located in the EU. Company A manufacturers a product and applies the name of Company B. Company B sells the product to a customer and the product is shipped from Company A direct to the customer. Which company is responsible for the technical file and issuing the DoC? Richard Woods --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
Re: What standards and features should ATE software systems (specifically VLSI) support
Folks, I have been asked about info on any ATE (specifically VLSI) standards and features that software systems should support. The standards may include what formats of device input data should be supported (or consider supporting) as well as output formats for results. If it is not proprietary, we would like to know what companies are using or are planning to use these formats/features. Best Regards,Paul J Smith, Teradyne, Inc., Boston, paul.j.sm...@teradyne.com --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
SLIM 7 The latest Document
Hi All The latest SLIM 7 Document is available from our web site under news flash, in pdf format. www.emc-journal.co.uk http://www.emc-journal.co.uk/ Cheers Alan E Hutley
RE: DC Cable color code
There are no color code requirements in EN60950 with the exception that green/yellow cannot be used for other than earthing conductors. Richard Woods -- From: Zohar Zosmanovich [SMTP:zohar_zosmanov...@radwin.com] Sent: Tuesday, February 27, 2001 3:43 AM To: 'emc-p...@majordomo.ieee.org' Subject: DC Cable color code Hi, Does cables for DC voltage distribution (in ITE) needs to be color coded for Europe ? Thanks Zohar (Jana) Zosmanovich Compliance Engineer, RADWIN ltd. 34 Habarzel St., Tel Aviv 69710, Israel Tel.: 972-3-7666735 ; Fax: 972-3-7657535 Email: mailto:zohar_zosmanov...@radwin.com --- 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: http://www.rcic.com/ click on Virtual Conference Hall, --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
RE: SAR
If the drafts have been submitted for public comment (check the CENELEC site for status), you should be able to obtain copies from BSI or any other CENELEC member. Richard Woods -- From: John Woodgate [SMTP:j...@jmwa.demon.co.uk] Sent: Tuesday, February 27, 2001 2:05 AM To: ron_cher...@densolabs.com Cc: emc-p...@ieee.org Subject: Re: SAR 88256a00.00017d3d...@smtp.densolabs.com, ron_cher...@densolabs.com wrote: Does anyone have a copy or can direct me to a location where I can get a copy of prEN50360 and prEN50361. If they are really still 'pr', they are unapproved drafts and are not in the public domain. But if they are published, go to hppt://www.cenelec.org and search for 'EN 50360' and 'EN 50361'. -- Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839 Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Foxhunters suffer from tallyhosis. PLEASE do not mail copies of newsgroup posts to me. --- 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: http://www.rcic.com/ click on Virtual Conference Hall, --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
Re: FW: Harmonics -- WSJ opinion.
nebbjkpamlaglbmfcdnnceigcdaa.jo...@medson.com, Jon Griver jo...@medson.com wrote: He either pays the manufacturer for increased design and manufacturing costs for compliance with the harmonics standard, or he pays the electric company for increased infrastructure. True, but the intent of the current standards work is to try to minimise the total cost, thus being fair to the consumer, the equipment manufacturers and the supply industry. It's not an easy task, because relevant data is scarce, and costly to collect. -- Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839 Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Foxhunters suffer from tallyhosis. PLEASE do not mail copies of newsgroup posts to me. --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
Re: DC Cable color code
116CA223EAAED2119F050090272E3D7F011457F6@EXCHANGE, Zohar Zosmanovich zohar_zosmanov...@radwin.com wrote: Does cables for DC voltage distribution (in ITE) needs to be color coded for Europe ? Not if you mean 'within the equipment'. But you must NOT use green/yellow for anything but the 'protective earth conductor'. Outside the equipment, avoid blue, brown and black, which could be mistaken for mains wiring. -- Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839 Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Foxhunters suffer from tallyhosis. PLEASE do not mail copies of newsgroup posts to me. --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
DC Cable color code
Hi, Does cables for DC voltage distribution (in ITE) needs to be color coded for Europe ? Thanks Zohar (Jana) Zosmanovich Compliance Engineer, RADWIN ltd. 34 Habarzel St., Tel Aviv 69710, Israel Tel.: 972-3-7666735 ; Fax: 972-3-7657535 Email: mailto:zohar_zosmanov...@radwin.com --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
FW: Harmonics -- WSJ opinion.
RE: Harmonics -- WSJ opinion.Rich, John It's of no interest to the consumer. He pays in any case. He either pays the manufacturer for increased design and manufacturing costs for compliance with the harmonics standard, or he pays the electric company for increased infrastructure. Best Wishes, Jon Griver One comment of Mr Hunter's that stood out in particular was the very last . . . . . . the only ones who benefit from the harmonic current emission standard are the European electricity distributors. They avoid investments in bolstering their networks against the theoretical harmonics risk at the cost of manufacturers and consumers.
Re: SAR
88256a00.00017d3d...@smtp.densolabs.com, ron_cher...@densolabs.com wrote: Does anyone have a copy or can direct me to a location where I can get a copy of prEN50360 and prEN50361. If they are really still 'pr', they are unapproved drafts and are not in the public domain. But if they are published, go to hppt://www.cenelec.org and search for 'EN 50360' and 'EN 50361'. -- Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839 Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Foxhunters suffer from tallyhosis. PLEASE do not mail copies of newsgroup posts to me. --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
SAR
Does anyone have a copy or can direct me to a location where I can get a copy of prEN50360 and prEN50361. Thanks, Ron Chernus, W6EEE Compliance Engineer, DENSO --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
Re: Harmonics -- WSJ opinion.
E15CFB09B1FAD311B74700D0B746BDC12CC814@EMAIL, John Juhasz jjuh...@fiberoptions.com wrote: I like to give the benefit of the doubt that the standard was created based on sound technical evidence. It was based on INADEQUATE technical evidence, but not on NO technical evidence. Also involved was a prediction of how the demonstrated rise in harmonics over the decade 1978-1988 would continue in the future. That prediction seems to have been pessimistic, not because the harmonics currents of distorting loads are less in proportion to the fundamental, but because the fundamental has decreased due to design improvements and 'green' pressures. I lead an IEC group which is producing an IEC Report on the subject (future IEC61000-1-4). -- Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839 Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Foxhunters suffer from tallyhosis. PLEASE do not mail copies of newsgroup posts to me. --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
Re: Harmonics -- WSJ opinion.
200102262030.maa28...@epgc196.sdd.hp.com, Rich Nute ri...@sdd.hp.com wrote: Of course, no one has shown that unacceptable overheating will actually occur. Do you have any more such gems to contribute? What do you think happens to the total current through a capacitor when the applied voltage contains harmonics? What happens to the I^2R loss and the dielectric loss? What happens to hysteresis loss in motors and transformers? -- Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839 Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Foxhunters suffer from tallyhosis. PLEASE do not mail copies of newsgroup posts to me. --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
Re: Calibration of test equipment
3a9aa4c8.3df94...@curtis-straus.com, Jon D. Curtis jdc@curtis- straus.com wrote: I personally think this interpretation is overly severe, but we comply with it because we want our test reports to be accepted by authorities who think this process is reasonable. You are effectively succumbing to technological blackmail, and making resistance to such nonsense that much more difficult for others. I suppose the idea is that the calibrated equipment might catch an 'uncalibrating' infection from other equipment. (;-) -- Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839 Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Foxhunters suffer from tallyhosis. PLEASE do not mail copies of newsgroup posts to me. --- 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: http://www.rcic.com/ click on Virtual Conference Hall,
