RE: Shield Room Lighting
Well, except for the cold inrush current wear. I always left my lights off when I wasn't working in the chamber. A camera still allowed me to monitor equipment activity, which was either on a CRT or indicator lights. Fluorescents can indeed cause a large problem, but generally changing the tube every so often (the analyzer will tell you long before your eye) and eventually the ballast the fluorescents, in my experience will do fine. I have a current problem with some special ballasts and expensive spectral output fluorescents that require me to turn them off if I want to see anything below 100 Mhz, and pretty much anything up to 200 Mhz. Its all nasty broadband. Very expensive to fix, so I just put in some task lighting so that I can walk around without killing myself while measuring, and when I need to troubleshoot or repair I snap the fluorescents back on. Dirty but cheap and accomplishes the purpose for the prescan chamber. Gary -Original Message- From: Ralph McDiarmid [mailto:ralph.mcdiar...@xantrex.com] Sent: Thursday, October 31, 2002 11:55 AM To: EMC-PSTC (E-mail) Subject: RE: Shield Room Lighting We use four florescent screw-in lights in our 3-metre chamber and detect some emission 3dB or so above the noise floor. Ralph McDiarmid, AScT Member Technical Staff Engineering Services Xantrex Technology Inc. -Original Message- From: POWELL, DOUG [mailto:doug.pow...@aei.com] Sent: Thursday, October 31, 2002 9:49 AM To: EMC-PSTC (E-mail) Subject: Shield Room Lighting Greetings all, I wanted to share an experience and I hope benefits someone else. My past experience with shield room lighting is that incandescent bulbs frequently burn out, about once every 2-3 months. I tried ruggedized lamps of various sorts, still with the same results. Obviously, I wanted to avoid florescent lighting because of the huge fields they radiate. After some investigation and discussions with co-workers, it became apparent that the problem is the line filter for service power in the room and the tungsten filament in the bulb. These line filters are typically have a really large line to neutral capacitance which significantly lowers the source impedance of the line. Coupled with this, tungsten experiences a fairly high in-rush current owing to it's very dynamic negative temperature coefficient. I toyed with idea of using inrush limiters but I thought there had to be a reliable low-tech solution. And at all costs, whatever solution I used, I wanted to avoid injecting unwanted RF noise into the room. I discovered traffic light signal bulbs. Available from a few sources, these bulbs have at least 5 filament supports, heat dissipaters and reflectors and are designed for continuous on/off operation in all sorts of weather conditions. They even keep working when the hanging fixtures bang into each other in wind storms. I also learned that these bulbs have about a 1 to 2 year life expectancy in these conditions, so I tried it out in my room. So far, I've logged a full year of use on 4 x 150W bulbs with no burn out. And no, I don't just leave them turned on. If you want to try this, do it soon because it appears that these bulbs may become a thing of the past and prices may be driven up. Over the last few years, many cities and counties are replacing their incandescent bulbs with the new LED bulbs and with great success. As soon as a white LED light becomes available I may try it out, although I guess I could use red LED lamps since I used to be in the navy. Best regards, -doug Douglas E. Powell Compliance Engineer Advanced Energy Industries, Inc. Fort Collins, CO 80535 USA ___ This message, including any attachments, may contain information that is confidential and proprietary information of Advanced Energy Industries, Inc. The dissemination, distribution, use or copying of this message or any of its attachments is strictly prohibited without the express written consent of Advanced Energy Industries, 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc
Circuit pack ESD drain
All, Does anyone know of a sample waveform or general characteristics for worst case VI on an ESD drain pin when a circuit pack is inserted into an equipment shelf? This is an odd question I know, but my management asked for the info and I really have no idea (and it shouldn't happen anyway ;o) I guess even a typical maximum charge that can be expected to be on a circuit pack would be sufficient information. Thanks in advance! Dave Heald --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
Re: CE marking/testing of military equipment
Hi Folks Sorry - it's me again.! 'Her Majesty's Stationery Office' (HMSO is NOT the goverment standards group - it is the official government REGULATIONS publiishing site and is just like the Government Printing Office (at least, I think that is what it is called) in Washington etc. Also, I think you will find that many other countries that are not republics (God Forbid that should happen to the UK! - we already almost have President Tony Blair, and that is bad enough!) have odd names for some of their national institutions and organisations. Therefore I think I could make a few derogatory remarks about some US names and traditions - like calling a baseball or American football [??? - the ball is hardly ever kicked by anone's foot!] series, the World Series when the game in question is only played in the USA and a very few other countries) - so let's leave that type of funny remark for another time and place. Regards John Allen Technical Consultant Electromagnetics, Safety and Reliability Group ERA Technology Ltd Cleeve Rd Leatherhead Surrey KT22 7SA Tel: +44 (0) 1372-367025 (Direct) +44 (0) 1372-367000 (Switchboard) Fax: +44 (0) 1372-367102 (Fax) (but sent from my home email address!) - Original Message - From: plaw...@west.net To: EMC-PSTC emc-p...@ieee.org Sent: Wednesday, October 30, 2002 10:50 PM Subject: Re: CE marking/testing of military equipment Hi Gert: I made the comment about the UK based on the following information: http://www.emctla.org/Tech%20Notes/technical_guidance_note_33.htm 2) I found the standard referred to at: http://www.hmso.gov.uk/si/si1992/Uksi_19922372_en_1.htm See section 20. PS: I love the Brits - who else would title the government standards group 'Her Majesty's Stationery Office'! On Wed, 30 Oct 2002 20:48:18 +0100, Gert Gremmen g.grem...@cetest.nl wrote: There is no ground to beieve that military equiment is to be excluded in any country in Europe. This is definitely not the case in the Netherlands. Regards, Gert Gremmen ce-test, qualified testing Rotterdam, The Netherlands http://www.ce-test.nl -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of plaw...@west.net Sent: woensdag 30 oktober 2002 18:49 To: EMC-PSTC Subject: CE marking/testing of military equipment I have a customer asking for CISPR 22 test results on a commercial power supply intended for use in military equipment in Europe. I've heard the UK excludes military equipment from CE marking. Do other countries also exclude military equipment from the EMC Directive? If CISPR standards are not used for European military equipment, would MIL-STD-461 be used? Patrick Lawler plaw...@west.net --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list Patrick Lawler plaw...@west.net --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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:
Re: CE marking/testing of military equipment
Hi Folks Sorry the first message today was incomplete - here is the full version: I fully support Nick's observations. In respect of the comments made by Gert, I would like to point out that the UK appears to be not the only Member country that has taken advantage of Article 223 , and those countries are Full members - not half-members - so those comments are unjustiable! Even more to the point, it should be remembered (as I pointed out in my earlier message) that many newer directives include specific exclusions for equipment for military and state security applications - so everyone else now appears to accept and agree that the UK stance and legislation on the EMC Directive is entirely justifiable! Regards John Allen Technical Consultant Electromagnetics, Safety and Reliability Group ERA Technology Ltd Cleeve Rd Leatherhead Surrey KT22 7SA Tel: +44 (0) 1372-367025 (Direct) +44 (0) 1372-367000 (Switchboard) Fax: +44 (0) 1372-367102 (Fax) (but sent from my home email address!) - Original Message - From: Nick Williams nick.willi...@conformance.co.uk To: emc-p...@majordomo.ieee.org Sent: Thursday, October 31, 2002 4:30 PM Subject: RE: CE marking/testing of military equipment The UK's position is consistent with the provisions of, inter alia, article 223 of the Treaty of Rome and is therefore entirely legal. I shall not dignify the remaining comments by replying to them. They are unworthy of a forum such as this. Regards Nick. At 07:23 +0100 31/10/02, Gert Gremmen wrote: Hi Patrick, This text is British law,en the Uk is only a half member of the EC. This law is is not backed up by the EMC directive European Text. It is therefore contradictory to the EC membership requirements and theoretically illegal. But who will complain, as it is not creating trade barriers, and is limited to pure military equipment. As always, the British stand out in Europe, gaining from the profits, and not accepting the obligations. As Margaret Thatcher already said: Why else did God create the Channel ? Regards, Gert Gremmen ce-test, qualified testing Rotterdam, The Netherlands http://www.ce-test.nl -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of plaw...@west.net Sent: woensdag 30 oktober 2002 23:50 To: EMC-PSTC Subject: Re: CE marking/testing of military equipment Hi Gert: I made the comment about the UK based on the following information: http://www.emctla.org/Tech%20Notes/technical_guidance_note_33.htm 2) I found the standard referred to at: http://www.hmso.gov.uk/si/si1992/Uksi_19922372_en_1.htm See section 20. PS: I love the Brits - who else would title the government standards group 'Her Majesty's Stationery Office'! On Wed, 30 Oct 2002 20:48:18 +0100, Gert Gremmen g.grem...@cetest.nl wrote: There is no ground to beieve that military equiment is to be excluded in any country in Europe. This is definitely not the case in the Netherlands. Regards, Gert Gremmen ce-test, qualified testing Rotterdam, The Netherlands http://www.ce-test.nl -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of plaw...@west.net Sent: woensdag 30 oktober 2002 18:49 To: EMC-PSTC Subject: CE marking/testing of military equipment I have a customer asking for CISPR 22 test results on a commercial power supply intended for use in military equipment in Europe. I've heard the UK excludes military equipment from CE marking. Do other countries also exclude military equipment from the EMC Directive? If CISPR standards are not used for European military equipment, would MIL-STD-461 be used? Patrick Lawler plaw...@west.net --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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
Re: CE marking/testing of military equipment
Hi Folks I fully support Nick's observations. In respect of the other comments, the UK is not the only Member country that has taken advantage of Article 223 , and those countries are Full members - not half-members - so the comments are unjustiable. Finally, it should be remembered (as I pointed out in my earlier message) that many other new - Original Message - From: Nick Williams nick.willi...@conformance.co.uk To: emc-p...@majordomo.ieee.org Sent: Thursday, October 31, 2002 4:30 PM Subject: RE: CE marking/testing of military equipment The UK's position is consistent with the provisions of, inter alia, article 223 of the Treaty of Rome and is therefore entirely legal. I shall not dignify the remaining comments by replying to them. They are unworthy of a forum such as this. Regards Nick. At 07:23 +0100 31/10/02, Gert Gremmen wrote: Hi Patrick, This text is British law,en the Uk is only a half member of the EC. This law is is not backed up by the EMC directive European Text. It is therefore contradictory to the EC membership requirements and theoretically illegal. But who will complain, as it is not creating trade barriers, and is limited to pure military equipment. As always, the British stand out in Europe, gaining from the profits, and not accepting the obligations. As Margaret Thatcher already said: Why else did God create the Channel ? Regards, Gert Gremmen ce-test, qualified testing Rotterdam, The Netherlands http://www.ce-test.nl -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of plaw...@west.net Sent: woensdag 30 oktober 2002 23:50 To: EMC-PSTC Subject: Re: CE marking/testing of military equipment Hi Gert: I made the comment about the UK based on the following information: http://www.emctla.org/Tech%20Notes/technical_guidance_note_33.htm 2) I found the standard referred to at: http://www.hmso.gov.uk/si/si1992/Uksi_19922372_en_1.htm See section 20. PS: I love the Brits - who else would title the government standards group 'Her Majesty's Stationery Office'! On Wed, 30 Oct 2002 20:48:18 +0100, Gert Gremmen g.grem...@cetest.nl wrote: There is no ground to beieve that military equiment is to be excluded in any country in Europe. This is definitely not the case in the Netherlands. Regards, Gert Gremmen ce-test, qualified testing Rotterdam, The Netherlands http://www.ce-test.nl -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of plaw...@west.net Sent: woensdag 30 oktober 2002 18:49 To: EMC-PSTC Subject: CE marking/testing of military equipment I have a customer asking for CISPR 22 test results on a commercial power supply intended for use in military equipment in Europe. I've heard the UK excludes military equipment from CE marking. Do other countries also exclude military equipment from the EMC Directive? If CISPR standards are not used for European military equipment, would MIL-STD-461 be used? Patrick Lawler plaw...@west.net --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list Patrick Lawler plaw...@west.net --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at:
RE: Shield Room Lighting
I think that another factor in shortening the life of incandescent lights is the fact that they are usually mounted in a heavy glass protective fixture. These glass globes offer a bit more safety from physical damage, and also look nicer than a bare light bulb in a socket. But the light bulb runs a lot hotter when you use the globe. I think this shortens the bulb life too. In my chambers, I have gone to bare bulbs in sockets. Of course, since my chambers are 9 feet tall, the bulbs are fairly safe even when people are moving large objects around (I have never had anyone accidentally hit a bare light bulb). I now use ordinary 100 W bulbs in open fixtures, and, over the past two years, my bulb life has improved to a point where I don't even think about it any more. BTW, my facilities guys wanted me to use some exotic industrial grade bulbs. IIRC, they were rated at 135 V for 100 W (so I suppose they were NOT 100 W bulbs at 120 V g). These bulbs were slightly longer and larger than an ordinary bulb, and had an anti-breakage Teflon film on the bulb surface. This gave then a satin appearance. However, those bulbs burned out just about as fast as ordinary bulbs (I was using them within globes at the time), and I since they cost several times more, I stopped using them. 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 Is Our Specialty Shake-Bake-Shock - Metrology - Reliability Analysis -Original Message- From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: Thursday, October 31, 2002 12:00 PM To: emc-p...@ieee.org Subject: RE: Shield Room Lighting We have the same frequent burn out problem and we also have attributed it to the filters. We just keep replacing them. Has anyone tried the rugged bulbs marketed for use with garage door openers or ceiling fans or have tried the extended life bulbs? Do they last longer in chamber use to justify the cost? Richard Woods Sensormatic Electronics Tyco International -Original Message- From: POWELL, DOUG [mailto:doug.pow...@aei.com] Sent: Thursday, October 31, 2002 12:49 PM To: EMC-PSTC (E-mail) Subject: Shield Room Lighting Greetings all, I wanted to share an experience and I hope benefits someone else. My past experience with shield room lighting is that incandescent bulbs frequently burn out, about once every 2-3 months. I tried ruggedized lamps of various sorts, still with the same results. Obviously, I wanted to avoid florescent lighting because of the huge fields they radiate. After some investigation and discussions with co-workers, it became apparent that the problem is the line filter for service power in the room and the tungsten filament in the bulb. These line filters are typically have a really large line to neutral capacitance which significantly lowers the source impedance of the line. Coupled with this, tungsten experiences a fairly high in-rush current owing to it's very dynamic negative temperature coefficient. I toyed with idea of using inrush limiters but I thought there had to be a reliable low-tech solution. And at all costs, whatever solution I used, I wanted to avoid injecting unwanted RF noise into the room. I discovered traffic light signal bulbs. Available from a few sources, these bulbs have at least 5 filament supports, heat dissipaters and reflectors and are designed for continuous on/off operation in all sorts of weather conditions. They even keep working when the hanging fixtures bang into each other in wind storms. I also learned that these bulbs have about a 1 to 2 year life expectancy in these conditions, so I tried it out in my room. So far, I've logged a full year of use on 4 x 150W bulbs with no burn out. And no, I don't just leave them turned on. If you want to try this, do it soon because it appears that these bulbs may become a thing of the past and prices may be driven up. Over the last few years, many cities and counties are replacing their incandescent bulbs with the new LED bulbs and with great success. As soon as a white LED light becomes available I may try it out, although I guess I could use red LED lamps since I used to be in the navy. Best regards, -doug Douglas E. Powell Compliance Engineer Advanced Energy Industries, Inc. Fort Collins, CO 80535 USA --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org
SV: Surge - injection point on screened cable
Hello Kevin, That's correct, we do not have 20 different fire detectors (only 5-6), but in addition we have some sounders, manual call point, address units, fire door controllers, etc. And of course the fire alarm panel (control and indicating equipment). The cable screen is connected to earth on the panel, but not to any devices on the detection loop, it just runs through. I know this 20m requirements, but I wonder how much more induced surge pulse will occur when testing on a 20m cable compared to induce the pulse close up (0.5m) to a device ? Could be possible to increase the voltage to make some sort of correction? During the discussion with the lab today, it seems that I have to bring my wire cutter tomorrow and an extra 20m cable Best regards Amund Westin, Oslo / NORWAY -Opprinnelig melding- Fra: Kevin Harris [mailto:kevinharr...@dsc.com] Sendt: 31. oktober 2002 22:41 Til: 'am...@westin-emission.no'; emc-p...@majordomo.ieee.org Emne: RE: Surge - injection point on screened cable Hi Amund, You only require the one piece of 20 meter cable and it has to be attached to your EUT. Only one thing can be the EUT at a time. I don't know if the EUT is your control and indicating equipment ( CIE ) or your other devices on the cable or if it is all of them. Assuming (worst case) that it is all of them, then you need to select each part in turn as the EUT add the 20 meter cable to it and isolate all the other devices from the surge. Trying to surge all 20 devices at the same time is not proper either. In the case you state, you have whatever protection scheme you have implemented in each device in parallel with 19 others and therefore improperly distribute the surge energy across all of them. BTW are your devices on the cable earthed? If they are not, be sure to check that the test house has a 10nF cap from the screen to earth at the EUT end of the cable as per Fig 3 in EN 50130-4 I may be reading things in to far, but I inferred from your wish to surge all devices on the cable at the same time that you have 20 different things that you want tested and not 20 identical devices. I can't imagine that you actually have 20 completely different fire detectors. If you have devices that have various options test only a fully loaded one and apply the results across the whole line. It's a whole lot cheaper testing that way :) Best Regards, Kevin Harris Manager, Approvals and CAD Services Digital Security Controls 3301 Langstaff Road Concord, Ontario CANADA L4K 4L2 Tel: +1 905 760 3000 Ext. 2378 Fax +1 905 760 3020 Email: kevinharr...@dsc.com -Original Message- From: am...@westin-emission.no [mailto:am...@westin-emission.no] Sent: Thursday, October 31, 2002 10:48 AM To: emc-p...@majordomo.ieee.org Subject: Surge - injection point on screened cable [fadr] According to IEC/EN 61000-4-5, the surge pulse shall be injected onto a screened cable 20 meters from the DUT. We have a fire alarm system with 20 detectors connected on the same screened cable, 1.5 meters between each detector. We have been told from the local test lab that we have to add a 20m cable between each detector in order to surge test each detector. I'm sure our local cable distributor like that idea ... , but do we really have to do this ? Why is this 20 meters cable needed ? Is it to induce the surge pulse from the screen into the cable lines? The 20 detectors make a total cable distance of 30 meters and the screen is continuous. Is it possible to insert a pulse in the beginning of the cable and test all detectors simultaneous ? Regards Amund --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute:
Re: Official Languages of Countries
the CIA website has great descriptions of each country. Yes, that CIA!!! http://www.cia.gov/cia/publications/factbook/index.html --- Stephen Irving sirv...@lutron.com wrote: Hello everyone. My name is Steve Irving, and I am new to this forum. Does anyone know where to find a reliable, up-to-date list of the official languages of each country? This list would be useful to people selling products internationally, as many standards require instructions in the official language of each country of sale. Thanks for your help, Steve Stephen R. Irving Project Electrical Engineer Lutron Electronics, Co. Inc. +1 (610) 282 - 6468 +1 (610) 282 - 7324 [Fax] = Best Regards Hans Mellberg Regulatory Compliance EMC Design Services Consultant By the Pacific Coast next to Silicon Valley, Santa Cruz, CA, USA office:831-454-9450, cell:408-507-9694, fax:831-454-0755 __ Do you Yahoo!? HotJobs - Search new jobs daily now http://hotjobs.yahoo.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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: Shield Room Lighting
All, I've had at least three requests for sources on bulbs and possibly more requests on the way. So I'll reply to the group instead of individually. By the way, oven, refrigerator, garage door, and drop light bulbs did not work for me. They were rugged use but apparently not rugged enough. In fact, I thought about buying some of these traffic signal bulbs for my own use in the shop at home. Also forget looking into those special life-time guarantee deals you sometimes see by mail order. All they do is rate the bulb for 130V and count on enough people not cashing in on the guarantee to make a profit. A couple of makers are ITE, GE Lighting Sylvania. Ask specifically for incandescent traffic signal bulbs. The ones I am using are the GE Watt-Miser 135W, 120V, 7000 Hr Traffic Signal bulb. I got them through a local electric supply house, not at the local hardware/lumber stores like Home Depot. If you use the following link and replace the string 12345 string with your actual zip code you should get a nice list of local places who might be able to help. http://www.google.com/search?sa=Xoi=fwppb=fq=electric+12345 Although I've not done it, you should also be able to order online: http://hhlightinginc.com/traffic.htm http://www.electriciansupplies.com/index.cfm/S/21/Traffic_Signal_Light_Bulbs .htm http://www.eriklighting.com/product.asp?lc=5sc=96 http://www.mmlights.com/trafficsignal.html http://www.urbantransport-technology.com/contractors/surfacing/luxram/ I attached a photo of one of my bulbs. As you can see, it has a standard envelope size and screw-in base, it fits most light fixtures. These lamps feature 5 filament support wires, a heat deflector inside the envelope, the base has special high temperature glue and 95% krypton gas (inert). Right now I have a similar request in for the same type of lighting but this time in a spot or flood light configuration. We'll see what turns up. -doug ___ This message, including any attachments, may contain information that is confidential and proprietary information of Advanced Energy Industries, Inc. The dissemination, distribution, use or copying of this message or any of its attachments is strictly prohibited without the express written consent of Advanced Energy Industries, Inc. attachment: ge_bulb.jpg
Re: CCC mark testlab cetification
Fred, You raised a good point here by answering Chet's questions. Here is the update of CNCA accreditation. Since CCC was initially anounced to be implemented in May, the whole system was actually not ready at that time even the cost of testing and certification were not defined until late July. BTW - The first US manufacturer who went through CCC factory inspection and certification since CCC was implemented is my customer so I know they were not ready when my customer applied for CCC. In June, CNCA announced TWO (2) CCC certification bodies accredited to issue CCC certification mark and 68 Chinese labs accredited to perform CCC testing covering 19 categories of products regulated under CCC. 9 labs located in different regions of China are accredited for electrical electronics and IT products testing. The complete set (47 volumes) of CCC regulations are available for manufacturer's reference for a couple of US dollars each volume. If I were you, the manufacturer, I would not spend several hundred dollars to buy them from other sources. For Chinese manufacturers, the closest lab will be assigned for CCC testing. For foreign manufacturers, the labs located in Beijing will be assigned for CCC testing. (This seems to loose recently and foreign manufacturer now can name a prefered lab to perform CCC testing if sufficient reasons being raised. One of my customers did this recently as two labs in Beijing have different views on the issue of whether the power adapter provided by other manufacturer shall be included in the certification of their products and we finally achieved a perfect agreement with one of the Certification body for the best interest of this customer, this, I thought, is the value of using a qualified agent). There is no other agency accredited to issue CCC mark other than 2 accredited Chinese agencies both located in Beijing. There is no so-called registered agent to perform CCC certification either issueing CCC mark or perform CCC testing. There is no foreign labs accredited by CNCA to perform CCC testing other than 68 accredited labs in China. All application must be made to 2 accredited CCC certification bodies and tested by one of 68 labs in China, either directly by the manufacturers or through an agent. However, the value of employing an agent, I believe, is to efficiently communicate with both certification body and test lab to facilitate the process, define the testing scope, and trouble-shooting with Chinese Engineers if unpleasant failure occurs. So such agent should have both Estern and Western backgrounds, understand Chinese culture, speak their language, and with sound Compliance Engineering knowledge. Please also note that MII Type approval is different. MII and CNCA are not in the same boat. MII has its own regulations and accredited labs. For foreign manufacturers, MII test lab can assign Engineers to the customer site to perform testing and issue MII accredited report for MII type approval - (BWT: We have done this for our customers before and it's is extremely helpful and benefitial to foreign manuacturers consdiering the transporation cost of big telecom racks shipped to China!, It could be OK if US Western coast ports are running smoothly). Should anyone like to understand more of China approvals, feel free to contact me off-line. Hope this helps. Leslie Fred Borda fbo...@typeapproval.com wrote: Hi Chet, The set of documents published by CNCA, the authority that administers the CCC mark scheme in China, is available in English at: http://www.typeapproval.com/cn/emc.html The document labeled Regulations for CPCS.pdf is the overall regulations guiding the regime. It addresses type testing. While I don't believe it specifically says that testing performed outside China is not accepted, a lot is determined at the implementation level. Testing must be performed at CNCA accredited laboratories. I don't know of any such accredited labs outside China. I know that several US manufacturers had sought to have their own labs accredited at one point, but the last I heard was that these applications have all been in limbo for a very long time. As a practical matter, the testing must be conducted in China. As for laboratories becoming accepted agents, if by that you mean accreditation to have their test reports accepted by certification bodies in China, this is the procedure mentioned above that some labs have tried. I'm eager to hear from any list members about progress they may have made in this accreditation process. If by accepted agent you mean a foreign lab to become a certification body to issue the CCC mark, I think we may not see this for some time to come. Has anyone else seen further movement on this front? -Fred Borda Compliance International www.typeapproval.com At AM 11:01 10/31/02 -0800, Summers, Chet wrote: Hello Listmembers. I am researching the procedures needed to obtain the CCC mark for shipment of
Re: CCC mark testlab cetification
Hi Chet, To get an overview of CCC regulations, download this file: http://www.siemic.com/Original%20files/CCC%20mark.pdf I just want to remind you that some other regulation may be applicable to your products in addition to CCC, particularly, the MPS regulations on security products. For a general review of Chinese regulations, pls take a look at the attached document (CHINA.pdf). For those who are not interested in this topic, please ignore the attachment although I thought it could be interesting to you. For more detail information and procedures of China approvals, pls contact me off-line. Thanks, Leslie Summers, Chet csumm...@pelco.com wrote: Hello Listmembers. I am researching the procedures needed to obtain the CCC mark for shipment of CCTV equipment into China and need some guidance from those experienced in the process. First, which Chinese document explicitly mandates type testing within China? I have read from various sourches that any testing not performed within the country is completely unacceptable. Where can I review the Chinese Government's official stand on type testing, for EMC and product safety? Lastly, I am looking for procedures necessary for a Regulatory Compliance Lab to become an accepted agent within China. Any experiences with this process that you are willing to share will be appreciated. Chet Summers Compliance Engineer Pelco tel 1-559-292-1981 X2822 fax 1-559-294-2697 --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list - Do you Yahoo!? HotJobs - Search new jobs daily now CHINA.pdf Description: CHINA.pdf
Official Languages of Countries
Hello everyone. My name is Steve Irving, and I am new to this forum. Does anyone know where to find a reliable, up-to-date list of the official languages of each country? This list would be useful to people selling products internationally, as many standards require instructions in the official language of each country of sale. Thanks for your help, Steve Stephen R. Irving Project Electrical Engineer Lutron Electronics, Co. Inc. +1 (610) 282 - 6468 +1 (610) 282 - 7324 [Fax]
RE: Shield Room Lighting
We have the same frequent burn out problem and we also have attributed it to the filters. We just keep replacing them. Has anyone tried the rugged bulbs marketed for use with garage door openers or ceiling fans or have tried the extended life bulbs? Do they last longer in chamber use to justify the cost? Richard Woods Sensormatic Electronics Tyco International -Original Message- From: POWELL, DOUG [mailto:doug.pow...@aei.com] Sent: Thursday, October 31, 2002 12:49 PM To: EMC-PSTC (E-mail) Subject: Shield Room Lighting Greetings all, I wanted to share an experience and I hope benefits someone else. My past experience with shield room lighting is that incandescent bulbs frequently burn out, about once every 2-3 months. I tried ruggedized lamps of various sorts, still with the same results. Obviously, I wanted to avoid florescent lighting because of the huge fields they radiate. After some investigation and discussions with co-workers, it became apparent that the problem is the line filter for service power in the room and the tungsten filament in the bulb. These line filters are typically have a really large line to neutral capacitance which significantly lowers the source impedance of the line. Coupled with this, tungsten experiences a fairly high in-rush current owing to it's very dynamic negative temperature coefficient. I toyed with idea of using inrush limiters but I thought there had to be a reliable low-tech solution. And at all costs, whatever solution I used, I wanted to avoid injecting unwanted RF noise into the room. I discovered traffic light signal bulbs. Available from a few sources, these bulbs have at least 5 filament supports, heat dissipaters and reflectors and are designed for continuous on/off operation in all sorts of weather conditions. They even keep working when the hanging fixtures bang into each other in wind storms. I also learned that these bulbs have about a 1 to 2 year life expectancy in these conditions, so I tried it out in my room. So far, I've logged a full year of use on 4 x 150W bulbs with no burn out. And no, I don't just leave them turned on. If you want to try this, do it soon because it appears that these bulbs may become a thing of the past and prices may be driven up. Over the last few years, many cities and counties are replacing their incandescent bulbs with the new LED bulbs and with great success. As soon as a white LED light becomes available I may try it out, although I guess I could use red LED lamps since I used to be in the navy. Best regards, -doug Douglas E. Powell Compliance Engineer Advanced Energy Industries, Inc. Fort Collins, CO 80535 USA ___ This message, including any attachments, may contain information that is confidential and proprietary information of Advanced Energy Industries, Inc. The dissemination, distribution, use or copying of this message or any of its attachments is strictly prohibited without the express written consent of Advanced Energy Industries, 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: Shield Room Lighting
We use four florescent screw-in lights in our 3-metre chamber and detect some emission 3dB or so above the noise floor. Ralph McDiarmid, AScT Member Technical Staff Engineering Services Xantrex Technology Inc. -Original Message- From: POWELL, DOUG [mailto:doug.pow...@aei.com] Sent: Thursday, October 31, 2002 9:49 AM To: EMC-PSTC (E-mail) Subject: Shield Room Lighting Greetings all, I wanted to share an experience and I hope benefits someone else. My past experience with shield room lighting is that incandescent bulbs frequently burn out, about once every 2-3 months. I tried ruggedized lamps of various sorts, still with the same results. Obviously, I wanted to avoid florescent lighting because of the huge fields they radiate. After some investigation and discussions with co-workers, it became apparent that the problem is the line filter for service power in the room and the tungsten filament in the bulb. These line filters are typically have a really large line to neutral capacitance which significantly lowers the source impedance of the line. Coupled with this, tungsten experiences a fairly high in-rush current owing to it's very dynamic negative temperature coefficient. I toyed with idea of using inrush limiters but I thought there had to be a reliable low-tech solution. And at all costs, whatever solution I used, I wanted to avoid injecting unwanted RF noise into the room. I discovered traffic light signal bulbs. Available from a few sources, these bulbs have at least 5 filament supports, heat dissipaters and reflectors and are designed for continuous on/off operation in all sorts of weather conditions. They even keep working when the hanging fixtures bang into each other in wind storms. I also learned that these bulbs have about a 1 to 2 year life expectancy in these conditions, so I tried it out in my room. So far, I've logged a full year of use on 4 x 150W bulbs with no burn out. And no, I don't just leave them turned on. If you want to try this, do it soon because it appears that these bulbs may become a thing of the past and prices may be driven up. Over the last few years, many cities and counties are replacing their incandescent bulbs with the new LED bulbs and with great success. As soon as a white LED light becomes available I may try it out, although I guess I could use red LED lamps since I used to be in the navy. Best regards, -doug Douglas E. Powell Compliance Engineer Advanced Energy Industries, Inc. Fort Collins, CO 80535 USA ___ This message, including any attachments, may contain information that is confidential and proprietary information of Advanced Energy Industries, Inc. The dissemination, distribution, use or copying of this message or any of its attachments is strictly prohibited without the express written consent of Advanced Energy Industries, 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
Re: CCC mark testlab cetification
Hi Chet, The set of documents published by CNCA, the authority that administers the CCC mark scheme in China, is available in English at: http://www.typeapproval.com/cn/emc.html The document labeled Regulations for CPCS.pdf is the overall regulations guiding the regime. It addresses type testing. While I don't believe it specifically says that testing performed outside China is not accepted, a lot is determined at the implementation level. Testing must be performed at CNCA accredited laboratories. I don't know of any such accredited labs outside China. I know that several US manufacturers had sought to have their own labs accredited at one point, but the last I heard was that these applications have all been in limbo for a very long time. As a practical matter, the testing must be conducted in China. As for laboratories becoming accepted agents, if by that you mean accreditation to have their test reports accepted by certification bodies in China, this is the procedure mentioned above that some labs have tried. I'm eager to hear from any list members about progress they may have made in this accreditation process. If by accepted agent you mean a foreign lab to become a certification body to issue the CCC mark, I think we may not see this for some time to come. Has anyone else seen further movement on this front? -Fred Borda Compliance International www.typeapproval.com At AM 11:01 10/31/02 -0800, Summers, Chet wrote: Hello Listmembers. I am researching the procedures needed to obtain the CCC mark for shipment of CCTV equipment into China and need some guidance from those experienced in the process. First, which Chinese document explicitly mandates type testing within China? I have read from various sourches that any testing not performed within the country is completely unacceptable. Where can I review the Chinese Government's official stand on type testing, for EMC and product safety? Lastly, I am looking for procedures necessary for a Regulatory Compliance Lab to become an accepted agent within China. Any experiences with this process that you are willing to share will be appreciated. Chet Summers Compliance Engineer Pelco tel 1-559-292-1981 X2822 fax 1-559-294-2697 --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list Fred Borda Director Marketing Business Development Compliance International www.typeapproval.com -- The experts in telecommunications equipment type approval across the Asia-Pacific region -- 4713 First Street, Suite 280 Pleasanton, California 94566-7362 USA Tel +1.925.417.5571 (direct) Fax +1.925.417.5574 Mobile +1.650.740.5762 fbo...@typeapproval.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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: Surge - injection point on screened cable
With respect to 'alarm systems' - EN 50130-4 is the applicable technical standard. However, 50130-4 refers to the IEC 1000/EN61000 series specs, 'but with modifications'. Let's take for instance the 1000-4-5 Surge spec that Amund referenced. In EN 50130-4, the following is stated: The test apparatus and procedure shall be as described in IEC 1000-4-5 with the following modifications and clarifications taken into account: Then there are two paragraphs - one for Mains and one for I/O lines. With regard to the length of cables in the I/O lines: The length of the signal lines between the EUT and to coupling/decoupling network(s) shall be less than/equal to 2m, But the sentence continues with a clarification if there is screened cables: however, if it is specified that certain signal lines must only be connected with screened cables, the in these cases the transients shall be applied to the screen of a 20m length of screened cable as show in figure 3. (Figure 3 is titled : Typical arrangement for coupling onto screened signal lines. It shows the test set-up with a 20m dimension between the EUT and the coupling/decoupling network). I guess they made that pretty clear in THAT standard. While a 'typical' installation of my product does not use screened cables of such lengths, I do make such a length available for the test. Hope this helps. John A. Juhasz GE Interlogix Fiber Options Div. Bohemia, NY -Original Message- From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: Thursday, October 31, 2002 1:05 PM To: emc-p...@majordomo.ieee.org Subject: RE: Surge - injection point on screened cable This is a good example of an inarticulate clause in a standard. One sentence in clause 7.5 reads Normally, the maximum length of the specified shielded cable shall be used. But the following sentence reads With respect to the frequency spectrum of the surge 20 m length of the specified shielded cable shall be used in non-inductively bundled configuration for physical reasons. Duh! What they heck are they trying to say in that last sentence? Are we expected to use the maximum length cable specified for the application but no longer than 20 m? That's seems to be what is being said in a convoluted way. Richard Woods Sensormatic Electronics Tyco International -Original Message- From: am...@westin-emission.no [mailto:am...@westin-emission.no] Sent: Thursday, October 31, 2002 10:48 AM To: emc-p...@majordomo.ieee.org Subject: Surge - injection point on screened cable According to IEC/EN 61000-4-5, the surge pulse shall be injected onto a screened cable 20 meters from the DUT. We have a fire alarm system with 20 detectors connected on the same screened cable, 1.5 meters between each detector. We have been told from the local test lab that we have to add a 20m cable between each detector in order to surge test each detector. I'm sure our local cable distributor like that idea ... , but do we really have to do this ? Why is this 20 meters cable needed ? Is it to induce the surge pulse from the screen into the cable lines? The 20 detectors make a total cable distance of 30 meters and the screen is continuous. Is it possible to insert a pulse in the beginning of the cable and test all detectors simultaneous ? Regards Amund --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our
CCC mark testlab cetification
Hello Listmembers. I am researching the procedures needed to obtain the CCC mark for shipment of CCTV equipment into China and need some guidance from those experienced in the process. First, which Chinese document explicitly mandates type testing within China? I have read from various sourches that any testing not performed within the country is completely unacceptable. Where can I review the Chinese Government's official stand on type testing, for EMC and product safety? Lastly, I am looking for procedures necessary for a Regulatory Compliance Lab to become an accepted agent within China. Any experiences with this process that you are willing to share will be appreciated. Chet Summers Compliance Engineer Pelco tel 1-559-292-1981 X2822 fax 1-559-294-2697 --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
Re:RE: EN61000-3-3 -3-11 off topic a bit!
I was just looking through my new copy of IEC61000-3-3:1994+A1:2001 standard. Under section 1 SCOPE, in the forth paragraph, it refers to the 3-11 standard this way; Part 3-11 is applicable to equipment with rated input current less than or equal to 75 A per phase and subject to conditional connection. Brian Kunde LECO Corp. Reply Separator Subject:RE: EN61000-3-3 -3-11 off topic a bit! Author: dhe...@tellium.com List-Post: emc-pstc@listserv.ieee.org Date: 10/31/02 11:43 AM But when was the last time you saw a plug rated (just a random example) 250V 3(phase)Y 75A when it means 25A per phase? the 75A rating is definately 'per phase'. -Original Message- From: Spencer, David H [mailto:david.spen...@usa.xerox.com] Sent: Thursday, October 31, 2002 8:16 AM To: emc-p...@majordomo.ieee.org Subject: RE: EN61000-3-3 -3-11 off topic a bit! I've just looked at all the draft copies of this standard(that I have), and the older version TR IEC 1000-3-5. Still only says 75amps. Again no per phase. I would have to say if TC77A wanted it to say 75A per phase, it would be in there. Regards Dave Spencer -Original Message- From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: Wednesday, October 30, 2002 3:07 PM To: emc-p...@majordomo.ieee.org Subject: EN61000-3-3 -3-11 off topic a bit! I read in !emc-pstc that Spencer, David H david.spen...@usa.xerox.com wrote (in 052106A55179D611B34300096BB02E3F8B93@USAMCMS4) about 'EN61000-3-3 -3-11 off topic a bit!' on Wed, 30 Oct 2002: Having looked into EN61000-3-11, there is a big difference from EN61000-3-3. The scope of 3-3 refers to products rated 16 amps or less per phase. There is no per phase specification in EN61000-3-11. Only this in the title: equipment with rated current 75 A. Further, the scope does not specify that as a per phase rating. I would say that the standard does not apply to any product with a total rating 75A. That would allow 3 phase products rated greater than 25A per phase to fall outside the scope of EN61000-3-11! That certainly needs to be clarified. I'll set the wheels in motion immediately. It SHOULD say 'per phase'. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron
RE: Surge - injection point on screened cable
This is a good example of an inarticulate clause in a standard. One sentence in clause 7.5 reads Normally, the maximum length of the specified shielded cable shall be used. But the following sentence reads With respect to the frequency spectrum of the surge 20 m length of the specified shielded cable shall be used in non-inductively bundled configuration for physical reasons. Duh! What they heck are they trying to say in that last sentence? Are we expected to use the maximum length cable specified for the application but no longer than 20 m? That's seems to be what is being said in a convoluted way. Richard Woods Sensormatic Electronics Tyco International -Original Message- From: am...@westin-emission.no [mailto:am...@westin-emission.no] Sent: Thursday, October 31, 2002 10:48 AM To: emc-p...@majordomo.ieee.org Subject: Surge - injection point on screened cable According to IEC/EN 61000-4-5, the surge pulse shall be injected onto a screened cable 20 meters from the DUT. We have a fire alarm system with 20 detectors connected on the same screened cable, 1.5 meters between each detector. We have been told from the local test lab that we have to add a 20m cable between each detector in order to surge test each detector. I'm sure our local cable distributor like that idea ... , but do we really have to do this ? Why is this 20 meters cable needed ? Is it to induce the surge pulse from the screen into the cable lines? The 20 detectors make a total cable distance of 30 meters and the screen is continuous. Is it possible to insert a pulse in the beginning of the cable and test all detectors simultaneous ? Regards Amund --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: CE marking/testing of military equipment/off topic
Hmm conferred by the Pope? I thought be generated the CofE in direct conflict to the Catholic Church... Best Regards Charles Grasso Senior Compliance Engineer Echostar Communications Corp. Tel: 303-706-5467 Fax: 303-799-6222 Cell: 303-204-2974 Email: charles.gra...@echostar.com; Email Alternate: chasgra...@ieee.org -Original Message- From: Cortland Richmond [mailto:72146@compuserve.com] Sent: Thursday, October 31, 2002 10:33 AM To: Ted Rook; ieee pstc list Subject: Re: CE marking/testing of military equipment/off topic Her Majesty Queen Elizabeth Second of The United Kingdom of Great Britain and Northern Ireland (G*d help us); Defender Of The Faith Funny you should mention that; it relates to certain matters under discussion here. Did you know that the first British monarch to bear the title Defender Of The Faith was Henry VIII? And that it was conferred on him by the Pope? See what happens when there's no DOW specified? (grin) Cortland --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
Shield Room Lighting
Greetings all, I wanted to share an experience and I hope benefits someone else. My past experience with shield room lighting is that incandescent bulbs frequently burn out, about once every 2-3 months. I tried ruggedized lamps of various sorts, still with the same results. Obviously, I wanted to avoid florescent lighting because of the huge fields they radiate. After some investigation and discussions with co-workers, it became apparent that the problem is the line filter for service power in the room and the tungsten filament in the bulb. These line filters are typically have a really large line to neutral capacitance which significantly lowers the source impedance of the line. Coupled with this, tungsten experiences a fairly high in-rush current owing to it's very dynamic negative temperature coefficient. I toyed with idea of using inrush limiters but I thought there had to be a reliable low-tech solution. And at all costs, whatever solution I used, I wanted to avoid injecting unwanted RF noise into the room. I discovered traffic light signal bulbs. Available from a few sources, these bulbs have at least 5 filament supports, heat dissipaters and reflectors and are designed for continuous on/off operation in all sorts of weather conditions. They even keep working when the hanging fixtures bang into each other in wind storms. I also learned that these bulbs have about a 1 to 2 year life expectancy in these conditions, so I tried it out in my room. So far, I've logged a full year of use on 4 x 150W bulbs with no burn out. And no, I don't just leave them turned on. If you want to try this, do it soon because it appears that these bulbs may become a thing of the past and prices may be driven up. Over the last few years, many cities and counties are replacing their incandescent bulbs with the new LED bulbs and with great success. As soon as a white LED light becomes available I may try it out, although I guess I could use red LED lamps since I used to be in the navy. Best regards, -doug Douglas E. Powell Compliance Engineer Advanced Energy Industries, Inc. Fort Collins, CO 80535 USA ___ This message, including any attachments, may contain information that is confidential and proprietary information of Advanced Energy Industries, Inc. The dissemination, distribution, use or copying of this message or any of its attachments is strictly prohibited without the express written consent of Advanced Energy Industries, 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
Re: CE marking/testing of military equipment/off topic
Her Majesty Queen Elizabeth Second of The United Kingdom of Great Britain and Northern Ireland (G*d help us); Defender Of The Faith Funny you should mention that; it relates to certain matters under discussion here. Did you know that the first British monarch to bear the title Defender Of The Faith was Henry VIII? And that it was conferred on him by the Pope? See what happens when there's no DOW specified? (grin) Cortland --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
Another interesting UK vacancy
I was reading the news.bbc.uk web page today (again). I followed the link from the Apache helicopters parked in shed due to the lack of pilots story, this led me to Westland Helicopters. They have a vacancy posted for an EMC engineer at the HNC+ some experience level. I wish I could spot jobs in the San Jose bay area as easily. Jim --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: CE marking/testing of military equipment
The UK's position is consistent with the provisions of, inter alia, article 223 of the Treaty of Rome and is therefore entirely legal. I shall not dignify the remaining comments by replying to them. They are unworthy of a forum such as this. Regards Nick. At 07:23 +0100 31/10/02, Gert Gremmen wrote: Hi Patrick, This text is British law,en the Uk is only a half member of the EC. This law is is not backed up by the EMC directive European Text. It is therefore contradictory to the EC membership requirements and theoretically illegal. But who will complain, as it is not creating trade barriers, and is limited to pure military equipment. As always, the British stand out in Europe, gaining from the profits, and not accepting the obligations. As Margaret Thatcher already said: Why else did God create the Channel ? Regards, Gert Gremmen ce-test, qualified testing Rotterdam, The Netherlands http://www.ce-test.nl -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of plaw...@west.net Sent: woensdag 30 oktober 2002 23:50 To: EMC-PSTC Subject: Re: CE marking/testing of military equipment Hi Gert: I made the comment about the UK based on the following information: http://www.emctla.org/Tech%20Notes/technical_guidance_note_33.htm 2) I found the standard referred to at: http://www.hmso.gov.uk/si/si1992/Uksi_19922372_en_1.htm See section 20. PS: I love the Brits - who else would title the government standards group 'Her Majesty's Stationery Office'! On Wed, 30 Oct 2002 20:48:18 +0100, Gert Gremmen g.grem...@cetest.nl wrote: There is no ground to beieve that military equiment is to be excluded in any country in Europe. This is definitely not the case in the Netherlands. Regards, Gert Gremmen ce-test, qualified testing Rotterdam, The Netherlands http://www.ce-test.nl -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of plaw...@west.net Sent: woensdag 30 oktober 2002 18:49 To: EMC-PSTC Subject: CE marking/testing of military equipment I have a customer asking for CISPR 22 test results on a commercial power supply intended for use in military equipment in Europe. I've heard the UK excludes military equipment from CE marking. Do other countries also exclude military equipment from the EMC Directive? If CISPR standards are not used for European military equipment, would MIL-STD-461 be used? Patrick Lawler plaw...@west.net --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list Patrick Lawler plaw...@west.net --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc
RE: EN61000-3-3 -3-11 off topic a bit!
But when was the last time you saw a plug rated (just a random example) 250V 3(phase)Y 75A when it means 25A per phase? the 75A rating is definately 'per phase'. -Original Message- From: Spencer, David H [mailto:david.spen...@usa.xerox.com] Sent: Thursday, October 31, 2002 8:16 AM To: emc-p...@majordomo.ieee.org Subject: RE: EN61000-3-3 -3-11 off topic a bit! I've just looked at all the draft copies of this standard(that I have), and the older version TR IEC 1000-3-5. Still only says 75amps. Again no per phase. I would have to say if TC77A wanted it to say 75A per phase, it would be in there. Regards Dave Spencer -Original Message- From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: Wednesday, October 30, 2002 3:07 PM To: emc-p...@majordomo.ieee.org Subject: EN61000-3-3 -3-11 off topic a bit! I read in !emc-pstc that Spencer, David H david.spen...@usa.xerox.com wrote (in 052106A55179D611B34300096BB02E3F8B93@USAMCMS4) about 'EN61000-3-3 -3-11 off topic a bit!' on Wed, 30 Oct 2002: Having looked into EN61000-3-11, there is a big difference from EN61000-3-3. The scope of 3-3 refers to products rated 16 amps or less per phase. There is no per phase specification in EN61000-3-11. Only this in the title: equipment with rated current 75 A. Further, the scope does not specify that as a per phase rating. I would say that the standard does not apply to any product with a total rating 75A. That would allow 3 phase products rated greater than 25A per phase to fall outside the scope of EN61000-3-11! That certainly needs to be clarified. I'll set the wheels in motion immediately. It SHOULD say 'per phase'. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
Re: CE marking/testing of military equipment/off topic
Not only that but when a King succeeds to the throne it will become His Majesty's Stationery Office. Yep it is a bit quaint but the organization was up to date the last time I contacted them. Your Humble Servant Ted Rook A Subject of Her Majesty Queen Elizabeth Second of The United Kingdom of Great Britain and Northern Ireland (G*d help us); Defender Of The Faith, and until daddy died, Emperor of India. Best Regards Ted Rook, Console Engineering, ext 4659 Please note our new location and phone numbers: Crest Audio Inc, 16-00 Pollitt Drive Fair Lawn, NJ 07410 USA 201 475 4600 telephone receptionist, 8.30 - 5 pm EST. 201 475 4659 direct line w/voice mail, 24 hrs. 201 475 4677 fax, 24 hrs. plaw...@west.net 30-Oct-02 5:50:10 PM Hi Gert: I made the comment about the UK based on the following information: http://www.emctla.org/Tech%20Notes/technical_guidance_note_33.htm 2) I found the standard referred to at: http://www.hmso.gov.uk/si/si1992/Uksi_19922372_en_1.htm See section 20. PS: I love the Brits - who else would title the government standards group 'Her Majesty's Stationery Office'! On Wed, 30 Oct 2002 20:48:18 +0100, Gert Gremmen g.grem...@cetest.nl wrote: There is no ground to beieve that military equiment is to be excluded in any country in Europe. This is definitely not the case in the Netherlands. Regards, Gert Gremmen ce-test, qualified testing Rotterdam, The Netherlands http://www.ce-test.nl -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of plaw...@west.net Sent: woensdag 30 oktober 2002 18:49 To: EMC-PSTC Subject: CE marking/testing of military equipment I have a customer asking for CISPR 22 test results on a commercial power supply intended for use in military equipment in Europe. I've heard the UK excludes military equipment from CE marking. Do other countries also exclude military equipment from the EMC Directive? If CISPR standards are not used for European military equipment, would MIL-STD-461 be used? Patrick Lawler plaw...@west.net --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list Patrick Lawler plaw...@west.net --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute:
Surge - injection point on screened cable
According to IEC/EN 61000-4-5, the surge pulse shall be injected onto a screened cable 20 meters from the DUT. We have a fire alarm system with 20 detectors connected on the same screened cable, 1.5 meters between each detector. We have been told from the local test lab that we have to add a 20m cable between each detector in order to surge test each detector. I'm sure our local cable distributor like that idea ... , but do we really have to do this ? Why is this 20 meters cable needed ? Is it to induce the surge pulse from the screen into the cable lines? The 20 detectors make a total cable distance of 30 meters and the screen is continuous. Is it possible to insert a pulse in the beginning of the cable and test all detectors simultaneous ? Regards Amund --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: Temp/Humidity Meter
-Original Message- From: HALL,KEN (HP-Roseville,ex1) [mailto:ken_h...@hp.com] Sent: Wednesday, October 30, 2002 4:32 PM To: 'POWELL, DOUG' Cc: 'g...@microprecision.com'; Emc-Pstc (E-mail) Subject: RE: Temp/Humidity Meter Hello, We buy Radio Shack and others and have them calibrated by MicroPrecision Regards, Ken Hall Hewlett-Packard http://www.microprecision.com/index.html There's just something about the above statement that makes me feel so ancient obsolete. g 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 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: EN61000-3-3 -3-11 off topic a bit!
I've just looked at all the draft copies of this standard(that I have), and the older version TR IEC 1000-3-5. Still only says 75amps. Again no per phase. I would have to say if TC77A wanted it to say 75A per phase, it would be in there. Regards Dave Spencer -Original Message- From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: Wednesday, October 30, 2002 3:07 PM To: emc-p...@majordomo.ieee.org Subject: EN61000-3-3 -3-11 off topic a bit! I read in !emc-pstc that Spencer, David H david.spen...@usa.xerox.com wrote (in 052106A55179D611B34300096BB02E3F8B93@USAMCMS4) about 'EN61000-3-3 -3-11 off topic a bit!' on Wed, 30 Oct 2002: Having looked into EN61000-3-11, there is a big difference from EN61000-3-3. The scope of 3-3 refers to products rated 16 amps or less per phase. There is no per phase specification in EN61000-3-11. Only this in the title: equipment with rated current 75 A. Further, the scope does not specify that as a per phase rating. I would say that the standard does not apply to any product with a total rating 75A. That would allow 3 phase products rated greater than 25A per phase to fall outside the scope of EN61000-3-11! That certainly needs to be clarified. I'll set the wheels in motion immediately. It SHOULD say 'per phase'. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
Re: CE marking/testing of military equipment
I believe that the Germans insist on military equipment being CE marked. UK military equipment needs to comply with Def Stan 59-41 for EMC requirements. Find it at www.dstan.mod.uk Luke Turnbull plaw...@west.net 10/30/02 05:48pm I have a customer asking for CISPR 22 test results on a commercial power supply intended for use in military equipment in Europe. I've heard the UK excludes military equipment from CE marking. Do other countries also exclude military equipment from the EMC Directive? If CISPR standards are not used for European military equipment, would MIL-STD-461 be used? Patrick Lawler plaw...@west.net --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
Re: CE marking/testing of military equipment
I read in !emc-pstc that plaw...@west.net wrote (in aun0su4ie5qe20vnk5b p66i32clboe7...@4ax.com) about 'CE marking/testing of military equipment' on Wed, 30 Oct 2002: PS: I love the Brits - who else would title the government standards group 'Her Majesty's Stationery Office'! It isn't the standards group, it's the government publisher, now part privatised. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: CE marking/testing of military equipment
Hi Patrick, This text is British law,en the Uk is only a half member of the EC. This law is is not backed up by the EMC directive European Text. It is therefore contradictory to the EC membership requirements and theoretically illegal. But who will complain, as it is not creating trade barriers, and is limited to pure military equipment. As always, the British stand out in Europe, gaining from the profits, and not accepting the obligations. As Margaret Thatcher already said: Why else did God create the Channel ? Regards, Gert Gremmen ce-test, qualified testing Rotterdam, The Netherlands http://www.ce-test.nl -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of plaw...@west.net Sent: woensdag 30 oktober 2002 23:50 To: EMC-PSTC Subject: Re: CE marking/testing of military equipment Hi Gert: I made the comment about the UK based on the following information: http://www.emctla.org/Tech%20Notes/technical_guidance_note_33.htm 2) I found the standard referred to at: http://www.hmso.gov.uk/si/si1992/Uksi_19922372_en_1.htm See section 20. PS: I love the Brits - who else would title the government standards group 'Her Majesty's Stationery Office'! On Wed, 30 Oct 2002 20:48:18 +0100, Gert Gremmen g.grem...@cetest.nl wrote: There is no ground to beieve that military equiment is to be excluded in any country in Europe. This is definitely not the case in the Netherlands. Regards, Gert Gremmen ce-test, qualified testing Rotterdam, The Netherlands http://www.ce-test.nl -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of plaw...@west.net Sent: woensdag 30 oktober 2002 18:49 To: EMC-PSTC Subject: CE marking/testing of military equipment I have a customer asking for CISPR 22 test results on a commercial power supply intended for use in military equipment in Europe. I've heard the UK excludes military equipment from CE marking. Do other countries also exclude military equipment from the EMC Directive? If CISPR standards are not used for European military equipment, would MIL-STD-461 be used? Patrick Lawler plaw...@west.net --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list Patrick Lawler plaw...@west.net --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald:
Re: EN61326:1997 Planning
And you seem to have forgotten that Schaffner also have products that compete for these test too Frank. lol Derek. --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
Re: EN61326:1997 Planning
Didn't forget at all. there are 7 or 8 manufacturers that can supply this equipment. Mike Hopkins - Original Message - From: Frank Krozel fr...@electronicinstrument.com To: Mike Hopkins michael.hopk...@thermo.com; 'Bill Flanigan' bflani...@ameritherm.com; emc-p...@majordomo.ieee.org Sent: Wednesday, October 30, 2002 7:05 PM Subject: Re: EN61326:1997 Planning Mike / all. You seem to have forgotten Amplifier Research has competing equipment to the one that you work for. Frank - Original Message - From: Mike Hopkins michael.hopk...@thermo.com To: 'Bill Flanigan' bflani...@ameritherm.com; emc-p...@majordomo.ieee.org Sent: Wednesday, October 30, 2002 12:34 PM Subject: RE: EN61326:1997 Planning These days, there are a number of combination testers on the market that will perform tests to both IEC 61000-4-5 and 61000-4-11. Thermo KeyTek has one for just under $10k that also does EFT and Mag fields for the same price Other manufacturers have similar units - prices depend on things like voltage (testing to as high as 6kV for surge), how the dip interrupt tests are done (external variac's and switches vs. internal tap switched transformers), software control, etc... I'll leave the CISPR 11 questions to someone more qualified than I am. Mike Hopkins -Original Message- From: Bill Flanigan [mailto:bflani...@ameritherm.com] Sent: Wednesday, October 30, 2002 10:27 AM To: emc-p...@majordomo.ieee.org Subject: EN61326:1997 Planning A few questions about compliance to EN 61326. Guidance requested from my emc-pstc colleagues What happened in Amendment 2; I have the standard to +A1 Immunity: EN 61000-4-5 [Imm'y Surge] what kind of equipment is needed to conduct this test? EN 61000-4-11[Imm'y Voltage dips] what kind of equipment is needed to conduct this test? Emissions: We manufacture equipment classified under EN55011 as ClassA Group2; we generate RF energy for industrial purposes, excluding communications. Section 7.2 says 'For equipment using ISM frequencies, see CISPR11.' *Does this mean _use_ EN55011:91 for emissions limits as I have been doing? EN 61326-1 doesn't mention anything about Group2 limits. *Is there now a distinction between ISM equipment and equipment using ISM frequencies? Not trying to split hairs here, but if it doesn't actually use ISM frequencies my equipment is calssified as ISM equipment, right? Wm Flanigan Standards Engineer Ameritherm Inc 1.800.456.4328 bflani...@ameritherm.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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: Measuring AC Line Impedance
I would have expected that the inductance would dominate the branch impedance at line frequency and its harmonics. Ralph McDiarmid, AScT Member Technical Staff Engineering Services Xantrex Technology Inc. www.xantrex.com -Original Message- From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: Wednesday, October 30, 2002 11:30 AM To: emc-p...@majordomo.ieee.org Subject: Re: Measuring AC Line Impedance I read in !emc-pstc that Spencer, David H david.spen...@usa.xerox.com wrote (in 052106A55179D611B34300096BB02E3F8B94@USAMCMS4) about 'Measuring AC Line Impedance' on Wed, 30 Oct 2002: Any comments or input would be welcome. It's how I do it. It comes as a surprise to some people that the voltage goes up when you put a big capacitor across the supply. Don't go over the top with BIG caps and resonate the supply inductance. You would NOT like the result, and neither would the electricity supplier. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
Re: Temp/Humidity Meter
Here are some EXTECH brand meters, somewhat mingled under Moisture Meters and Thermometers: http://www.electrical-contractor.net/the_store/EX/HMoisture_Main.htm http://www.electrical-contractor.net/the_store/EX/Therm_Main.htm Bill Addiss At 10:44 AM 10/30/02 -0800, Flinders, Randall wrote: Greetings fellow EMC'ers.. We are looking for a quality outdoor Temperature/Humidity meter for our open area test site. Any recommendations? Thanks! Randy Flinders Electromagnetic Compatibility Engineer Emulex Corporation - We Network Storage 3535 Harbor Blvd. Costa Mesa, Ca. 92626 Direct: (714) 513-8012 Fax: (714) 513-5408 Email: randall.flind...@emulex.com mailto:randall.flind...@emulex.com Web: http://www.emulex.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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list This E-mail scanned for viruses by RAVES(ReadyConnect.Net Anti-Virus EMail System) Bill Addiss Electrical Safety Forum http://www.Electrical-Safety.com This E-mail scanned for viruses by RAVES(ReadyConnect.Net Anti-Virus EMail System) --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
Re: measuring AC line impedance (:-)
I did that once. I had been measuring resistance and then needed to measure ac outlet potential, but forgot to change the meter knob position. Now I have a new meter. -- From: Ted Rook t...@crestaudio.com To: emc-p...@ieee.org Subject: measuring AC line impedance (:-) Date: Wed, Oct 30, 2002, 5:42 PM don't you stick the probes in the outlet with the knob set to 'OHMS'? (;o) sorry couldn't resist it. don't try this at home folks. --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: Temp/Humidity Meter
Hello, We buy Radio Shack and others and have them calibrated by MicroPrecision Regards, Ken Hall Hewlett-Packard http://www.microprecision.com/index.html -Original Message- From: POWELL, DOUG [mailto:doug.pow...@aei.com] Sent: Wednesday, October 30, 2002 2:42 PM To: 'Flinders, Randall'; Emc-Pstc (E-mail) Subject: RE: Temp/Humidity Meter You could buy a Radio Shack hand held unit, but I don't know if you can trace calbration. Check out Vaisala Products at http://www.vaisala.com/thumbnail.asp?Section=5444 Best regards, -doug Douglas E. Powell Compliance Engineer Advanced Energy Industries, Inc. Fort Collins, CO 80535 USA -Original Message- From: Flinders, Randall [mailto:randall.flind...@emulex.com] Sent: Wednesday, October 30, 2002 11:44 AM To: Emc-Pstc (E-mail) Subject: Temp/Humidity Meter Greetings fellow EMC'ers.. We are looking for a quality outdoor Temperature/Humidity meter for our open area test site. Any recommendations? Thanks! Randy Flinders Electromagnetic Compatibility Engineer Emulex Corporation - We Network Storage 3535 Harbor Blvd. Costa Mesa, Ca. 92626 Direct: (714) 513-8012 Fax: (714) 513-5408 Email: randall.flind...@emulex.com mailto:randall.flind...@emulex.com Web: http://www.emulex.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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list ___ This message, including any attachments, may contain information that is confidential and proprietary information of Advanced Energy Industries, Inc. The dissemination, distribution, use or copying of this message or any of its attachments is strictly prohibited without the express written consent of Advanced Energy Industries, 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com 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://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
