Heat Sink Colour.
Could anyone tell me about the heatsink is really in lighter colour can release heat faster ( similar to we wearing lighter clothes in summer), but why people always painted the heatsink in black or very dark colour, and the material of the coating on heatsink will affect their performance? Thanks. 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Design of low cost ESD gun.
Can anyone provide some information about I want to make a low cost ESD gun for ESD test, the peak voltage about 4 or 8 k volt ( if it can induced + and - poloarity will be more better), the waveform just little similar to the specification, thanks. 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: Power cord Requirement in Latin America
Kevin, you can get the information here http://www.ita.doc.gov/media/Publications/pdf/current2002FINAL.pdf this is a 30 page pdf document you can download, it's free. Best regards, Lou Guerin Littlefeet, Inc. Poway, Ca From: Kevin Tseng [mailto:kevin_ts...@emclab2000.com] Sent: Thursday, May 08, 2003 2:03 PM To: Owner-Emc-Pstc (E-mail) Cc: EMC-PSTC (E-mail) (E-mail); Kevin Tseng (E-mail) Subject: Power cord Requirement in Latin America Dear EMC Group, Has any member know the require mark for AC Power, ITE, and AC adapter in Latin America (Brazil, Argentina, Bolivia, Mexico, Chile, Columbia, Costa Rica, Ecuador, El Salvador, Guatemala, Honduras, Nicaragua, Panama, Paraguay, Peru, Uruguay, and Venezuela). I couldn't find the information any where. Please help me to fin the information. I appreciate your help. Best Regards, Kevin Tseng/Program Manager EMC Compliance Management Group 670 National Ave. Mountain View CA94043 USA Tel: 650-988-0900x110 Fax:650-988-6647 www.emclab2000.com http://www.emclab2000.com/
RE: USB Interface
Hello Peter, I believe the USB spec was written with IEC60950 (clause 2.5: Limited Power Sources) in mind. It is not 100% guarantee to pass the requirement until being tested upon. So far I haven't come across system with USB interface (version 1.0 ~2.0) that fail this requirement. Cheng-Wee Lai Product Safety Department/Manager EMC Compliance Management Group Tel: 650-988-0900 ext. 118 Fax: 650-988-6647 email: chengwee_...@emclab2000.com From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of peter merguerian Sent: Wednesday, May 07, 2003 11:10 AM To: emc-p...@ieee.org Subject: USB Interface Dear All Where can I find a document regarding the international standard for USB interfaces? Does a computer USB interface meet the power limited criteria in IEC 60950? Peter _ Do you Yahoo!? The New http://us.rd.yahoo.com/search/mailsig/*http://search.yahoo.com Yahoo! Search - Faster. Easier. Bingo.
Re: ESD failure
Ravinder, I'd say that you are in pretty good shape now. EN 55024 (information technology equipment), EN 61000-6-1 (generic devices in residential, commercial, and light industrial environments), and EN 61000-6-2 (generic devices in industrial environments) all specify performance criterion B for: * +/-4kV contact discharges (including zaps to the horizontal and vertical coupling planes). * +/-8kV air discharges. I like to test up to +/-8kV contact discharge and +/-15kV air discharge. The effort we are willing to invest in trying to raise the ESD-immunity level depends on: * Where we are in the project. * How much margin we have already. * How much of a schedule crunch we are in. * The expected pain level for the next round of ESD fixes. * Whether my boss/client is starting to complain about the time I've already spent in ESD testing, versus everything else he/she needs me to do... If we are ESD testing an engineering unit, with another board spin planned-- and we have the time and opportunity-- I'll try to push the ESD-immunity level as high as I can so that we can include the fixes in the next layout pass. If we are testing a Design Verification Test unit, with no more board spins planned, I will shoot for at least 25% margin (meet performance criterion B for +/-5kV contact and +/-10kV air discharges), with no permanent damage for +/-8kV contact discharge and +/-15kV air discharge. If we are running the final approval tests on my own or a client's product, I grudgingly accept meeting performance criterion B for up to +/-4kV contact and +/-8kV air discharges. But I'll want to get the unit back into the ESD lab as soon as possible to see what happened to our margins! As always in engineering, we have to trade-off the time/effort to perfect a piece of a design versus getting the entire job done. I personally give ESD testing high priority, because it can help me find and fix so many weaknesses in designs quickly. But the person paying the bills has the final say, as long as we meet the legal and regulatory requirements. John Barnes KS4GL, PE, NCE, ESDC Eng, SM IEEE dBi Corporation http://www.dbicorporation.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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: ESD gun verification
John, The IEC TC77b WG-9 made clarification for what was intended to be understood as verification and what was intended to be a calibration. Different words are used now, but the new version of he standard 77b/378/CDV tries to eliminate the misunderstanding by some metrologists. They think that the present standard requires a traceble calibration as a daily or weekly test, not only a yearly calibration. David Pommerenke From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: Thursday, May 08, 2003 1:25 PM To: emc-p...@majordomo.ieee.org Subject: Re: ESD gun verification I read in !emc-pstc that Pommerenke, David davi...@umr.edu wrote (in a5d66e6b6f478b48a3cef22aa4b9fca378e...@umr-mail1.umr.edu) about 'ESD gun verification' on Wed, 7 May 2003: Brain, Spelling! I like to repeat: For verification you do not need calibrated equipment or full bandwidth. The verification is just a method to increase trust in the calibration. If you use some homemade current target and a 500 MHz scope, you will get a pretty good picture of the waveform and detect most changes in an ESD generator. A comb-generator run on an OATS is not a NSA calibration, still it establishes trust in the antennas, cables and the spectrum analyzer. Quite right and sensible, but tell that to a UK metrologist! If it's not 200% accurate, it's not believable.(;-) -- 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Power cord Requirement in Latin America
Dear EMC Group, Has any member know the require mark for AC Power, ITE, and AC adapter in Latin America (Brazil, Argentina, Bolivia, Mexico, Chile, Columbia, Costa Rica, Ecuador, El Salvador, Guatemala, Honduras, Nicaragua, Panama, Paraguay, Peru, Uruguay, and Venezuela). I couldn't find the information any where. Please help me to fin the information. I appreciate your help. Best Regards, Kevin Tseng/Program Manager EMC Compliance Management Group 670 National Ave. Mountain View CA94043 USA Tel: 650-988-0900x110 Fax:650-988-6647 www.emclab2000.com http://www.emclab2000.com/
RE: USB Interface
Peter, Try http://www.usb.org/developers/docs/ on USB 2.0. Kris From: peter merguerian [mailto:pmerguerian2...@yahoo.com] Sent: woensdag 7 mei 2003 20:10 To: emc-p...@ieee.org Subject: USB Interface Dear All Where can I find a document regarding the international standard for USB interfaces? Does a computer USB interface meet the power limited criteria in IEC 60950? Peter .
question regarding unlicensed transmitters
Hello Group, I have a general question along the following lines. Given an 802.11b wireless product, designed for operation on Channel 1-14, and with the capability to be configured by the user software interface for whatever country or region the user is in: If the user chooses to configure the product to operate on channels that are not allocated for a given country; who is in trouble, the manufacturer, or the user, or both? And does the responsibility vary by country? Thanks in advance George Stults WatchGuard Technologies Inc.
Malaysian Requirements for C.O. Equipment
I could've sworn I had this information, but can't seem to find it for the life of me. Has anyone had the pleasure of selling C.O. Equipment in Malaysia? If so, what where the applicable requirements regarding telecom, EMC and safety? To clarify, this product would not connect to the PSTN and does not provide connections to outside plant, only internal to the Central office. The more details, the better - Certification agencies, contact info, lead time, cost, etc. Thx, Joe * Joe Finlayson Manager, Compliance Engineering Telica, Inc. 734 Forest Street, Bldg. G, Suite 100 Marlboro, MA 01752 Tel: (508) 804-8212 Fax: (508) 480-0922 Email: jfinlay...@telica.com 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: Acoustic Noise Level
I read in !emc-pstc that richwo...@tycoint.com wrote (in 846BF526A205F8 4BA2B6045BBF7E9A6A04675F30@flbocexu05) about 'Acoustic Noise Level' on Wed, 7 May 2003: Does anyone know of a recommended maximum acoustic noise level for a laboratory? I'm not looking for a regulatory level, but a recommended maximum level that will allow employees in the lab to carry out normal activities without the noise causing undue problems with their productivity. It depends what the activities are, but in general, the quieter the better, down to the 'library' level (about 40 dBA), but not below, because sensory deprivation occurs in 'deathly hush' conditions. If the noise level is rather high, say 60 to 65 dBA, the critical factor is whether the sound is 'tonal' (has an identifiable pitch, as opposed to simply noise) and, above all, if it has a rhythmic component. The latter can drive people made even if it's more than 10 dB below the total noise level. -- 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: reinforced insulation - EN60950
Hi Alexandru: 1. Is the combination of Basic Insulation + FuseTransorb(15V) equivalent to Reinforced Insulation? No. The scheme of protection against electric shock relies on passive devices, not active devices. As a general rule, active devices, e.g., transorb, are not allowed as equivalent to one element of a two-safeguard scheme, i.e., basic insulation and supplementary insulation. For example, a GFCI/RCCB/ELCB could not be used as a substitute for supplementary insulation because it is an active device. Active schemes are permitted where additional enviromental conditions may exist that could bypass either or both Basic Insulation and Supplementary Insulation (or Reinforced Insulation). For example, GFCI/RCCB/ELCB is required for environments might be wet, where that wetness could bypass the insulation. Another general rule is that deliberate operation of a fuse is not permitted. (I do not have the rationale for this rule.) (Your characterization of Basic Insulation + Fuse Transorb as equivalent to Reinforced Insulation is incorrect. Reinforced Insulation is defined as a single, robust insulation equivalent to Double Insulation. The fact that your scheme includes Basic Insulation as an element means that the system cannot be Reinforced Insulation. A better characterization would be equivalent to Double Insulation.) 2. Does the transorb have to comply with a specific EN safety standard (like one applicable to Y caps)? Yes, if one exists. In the situation you describe, the transorb must be able to dissipate the full mains voltage and current, where the current is the circuit prospective current, for the maximum duration of the fuse, and still be operative for the next such event. Additionally, the transorb would need to dissipate the mains current at a current just below the fuse operating point, and do so indefinitely. And, there would be additional requirements. Best regards, Rich This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RES: Brazilian Test Houses Accredited to do Anatel testing
Dear Alexander and Group, as I told to Kevin: Contact Mr. Victor Vellano (vell...@cpqd.com.br) or Mr. Wilson Aparecido ( mailto:wil...@cpqd.com.br wil...@cpqd.com.br) at CPqD. The phone is +55 19 3705-7097. You can also contact CPqD in USA ( www.cpqdusa.com). Regards Sérgio L. Rocha Loures IC SC QE L - Laboratório de qualificação Quality and Engineering - Supply Chain SIEMENS Tel: +55 41 341-5898 Fax: +55 41 341-5058 sergioro...@siemens.com.br De: J Alexander [mailto:alexander...@yahoo.com] Enviada em: quarta-feira, 7 de maio de 2003 20:18 Para: Kevin Harris; EMC-PSTC (E-mail) Assunto: Re: Brazilian Test Houses Accredited to do Anatel testing Group, This is valuable info to the List members. Please copy the group on your replies. Alex Kevin Harris kevinharr...@dsc.com wrote: Dear Group, Could any of you who have worked with a test house in Brazil that is accredited to do Anatel testing (and that you are happy with) forward me the contact details of that test house off line please Thank you Kevin Harris 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 Archive is being moved, we will announce! when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc _ Do you Yahoo!? The New http://us.rd.yahoo.com/search/mailsig/*http://search.yahoo.com Yahoo! Search - Faster. Easier. Bingo. The information contained in this e-mail and in the attached files are for the exclusive use of the addressee herein nominated, and may contain trade secrets, privileged and other confidential information,protected by the applicable laws. In case you are not the right addressee, you are hereby notified that any reviewing, reading, copying and/or distributing of this e-mail's content is strictly prohibited and unauthorized. Please, delete the e-mail's content and notify the sender immediately. Thank you for your cooperation.
Re: ESD failure
Hi, It has been almost a week since I have been trying various techniques to fix the ESD problem in my PCB. I am particularly thankful of the suggestion by John Barnes to place a copper tape on the insulator over HCP and then move the EUT over the tape. John, I improvised it further by connecting a small piece of copper tape to the probe tip. I also connected the copper tape directly to the ground through a long wire. I could then move the probe tip over the circuit board with the ESD gun turned on. This way, I was able to accurately pinpoint the sensitive locations on the board. Currently, I have loaded special microcode which only reads the on-board flash and blinks the LED on the board, which simplifies my debugging process. I have tried placing low value decoupling capacitors (47 pF) on the following signals: JTAG Reset POR Analog VDD PLL VDD Couple of other lines used for ASIC configuration Every step has helped raise the threshold of failure. Now I can contact discharge directly on the board ground screws up to -7 kV without failure. I also have no problem with -7 kV contact discharge on the HCP. On Positive polarity, I can pass 8 kV. However, I am still failing at 8 kV Negative contact discharge on the board screws, and HCP. I would like to know if I am expecting too much from a complex logic (meaning should I declare victory with this level of improvement), or keep trying to make it more robust. I would welcome all suggestions. The ASIC has an embedded processor, and there are no external interrupt lines to filter. According to the ASIC designer, no other pin should impact the working of embedded processor. I still have to test the board with the actual microcode running real application. Once again Thanks to All for your valuable suggestions. Regards, Ravinder Server PCB and Flex Development Hitachi Global Storage Technologies *** Always do right. This will gratify some people and astonish the rest. Mark Twain 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: Brazilian Test Houses Accredited to do Anatel testing
Kevin, I suggest you to contact NMI Brasil that is an Anatel acredited EMC test lab we already worked with. Look at http://www.nmibrasil.com.br The tel is +55 19 38455965. You can also sent them an e-mail : n...@nmibrasil.com.br. I agree that the CPQD is also a good option, but if you want the complete list of acredited labs in Brasil, please go to see http://www.anatel.gov.br/index.asp?link /Certificacao/ensaios_avaliados.htm?Cod=1905 Good luck, Thomas Krzesaj Engenheiro EMC/EMI Genius Instituto de Tecnología Av. Açaí, 875 Bloco E 69075-904 Distrito Industrial Manaus - Amazonas Brasil Tel: +55 92 614-6578 / Fax: +55 92 613-3144 mailto:tkrze...@genius.org.br http://www.thomask.fr.st http://www.genius.org.br ___ If there is no solution, it's that there is no problem... Kevin Harris kevinharr...@dsc.comTo: EMC-PSTC (E-mail) emc-p...@ieee.org Sent by: cc: owner-emc-pstc@majordoSubject: Brazilian Test Houses Accredited to do Anatel testing mo.ieee.org 07/05/2003 12:19 Please respond to Kevin Harris Dear Group, Could any of you who have worked with a test house in Brazil that is accredited to do Anatel testing (and that you are happy with) forward me the contact details of that test house off line please Thank you Kevin Harris 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: Power Adapter LPS
Hi Angus, If you look in Annex P.2 of UL60950, a Class 2 power supply that complies with UL 1310 is deemed to comply with the requirements of UL60950 for the North American market. You do not need to do any further testing. A class 2 power supply is classed as an LPS (8A max). One thing to remember though is that a Class 2 power supply only requires basic insulation between primary and secondary, and most class 2 wall wart units are built this way. Depending on what your equipment you should assess whether this is a problem for your overall safety strategy. The class 2 power supply is a different animal from a Class II power supply as defined in 60950. Regards Doug Angus McGill ang...@cascade-eng.com To: 'emc-p...@majordomo.ieee.org' emc-p...@majordomo.ieee.org cc: Sent by: Subject: Power Adapter LPS owner-emc-pstc@majordom o.ieee.org 05/07/03 04:13 PM Please respond to Angus McGill I am choosing a UL1310 AC power adapter marked Class 2 Transformer for its output rating (12V, 1.0A), to sell with equipment that will be tested to UL60950. What are the advantages to doing additional testing on the power supply and marking it as ITE LPS? Would it help for UL's approval for the ITE equipment? Would it be just a matter of covering another edge in terms of my company's liability? Thanks for your suggestions. (Power input to the ITE is fused at roughly 2x max normal operating current). Angus McGill Cascade Engineering Services, 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Listserver delays -- Re: reinforced insulation - EN60950
Strange behavior of the list-server. Although I got some out-of-office replies, neither I or my fellows in the office (members of the list) have received the message posted 24 h ago. I'll try again... We are still experiencing delivery problems from the listserver. The IEEE gurus are at work trying to solve the problem. We thought it had been solved last week, but we're still experiencing difficulties. Basically, the difficulties show up as very late delivery (and occasional duplicate delivery) to the subscribers near the end of the list (which includes me). Very late can mean DAYS late. Normal time for delivery to the full subscriber list is 3-4 hours. Messages are sent in sequence to the subscriber address list, where long-time subscribers near the head of the list get their messages first, and so forth through the address list. At the moment, it appears that subscribers near the head of the list have normal service. However, subscribers near the end of the list (~700 and above, which would be those who subscribed in the past year or so) are experiencing significant delays, more than 24 hours. If the subscribers near the head of the list set their mailer with an Out Of Office message, then that message is sent immediately to the person posting the message. For posters near the end of the list, the OOO message will be received BEFORE the listserver message. (Indeed, this is the case even when the listserver is operating normally.) Please bear with us while we solve the problem. If you have further questions or comments, please send them directly to me or any of the administrators at the bottom of this message. Best regards, Rich Richard Nute IEEE emc-pstc Listserver Administrator ri...@ieee.org This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: reinforced insulation - EN60950
Alex, consult section 2.3.5 of EN 60950:1992 which specifies the conditions under which SELV can be connected to other circuits including ELV. Richard Woods Sensormatic Electronics Tyco International From: Alexandru Guidea [mailto:gui...@cae.com] Sent: Tuesday, May 06, 2003 6:47 PM To: 'emc-p...@majordomo.ieee.org' Subject: reinforced insulation - EN60950 Dear colleagues, As part of a PCB design required to be compliant with EN60950, we want to use the configuration described below, to be able to relax the traces separation. The circuit intended to become SELV is accessible to the operator. Questions: 1. Is the combination of Basic Insulation + FuseTransorb(15V) equivalent to Reinforced Insulation? 2. Does the transorb have to comply with a specific EN safety standard (like one applicable to Y caps)? Thanks, Alexandru Guidea CAE Inc. Canada Basic Insulation | | ELV||---FUSE--SELV (??) | T | R A N S O R B | | GND (EARTH) 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: Correction factors
I'm not familiar with the software in question, but most spectrum analyzer displays are linear, with some processing taking the spectrum analyzer display and plotting it out as log scale. If you have dense enough info about the transducer factor such that no significant interpolation is necessary, then it doesn't matter if you list it linearly and plot log, or vice versa. As long as you have a limit such as the FCC RE limit which is flat with discontinuous steps log or linear doesn't matter either. Ditto for the old FCC CE limit which was 48 dBuV from 450 kHz to 30 MHz. But the new FCC/CISPR CE limit has a non-zero slope plotted on a log scale, so there you need either an equation or list it as you plot it. From: Franck GALVIN franck.gal...@e-labs.fr Reply-To: Franck GALVIN franck.gal...@e-labs.fr List-Post: emc-pstc@listserv.ieee.org List-Post: emc-pstc@listserv.ieee.org List-Post: emc-pstc@listserv.ieee.org List-Post: emc-pstc@listserv.ieee.org Date: Tue, 6 May 2003 17:35:49 +0200 To: emc-p...@majordomo.ieee.org Subject: Correction factors Dear all, I perform conducted or radiated emission test with HP8594EM spectrum analyser or HP8656A receiver. To not have measurements errors I must enter correction factors (antenna or LISN, cable and other Š). My questions are: 1/ When you enter data to antenna factors for example, you write Œ¹frequency¹¹, Œ¹amplitude¹¹ and what about Œ¹frequency scale¹¹ (log or lin) ? 2/ Does frequency scale depend of correction type (cable, amplifier, antenna, LISN, transient limiterŠ)? Thanks in advance for your answers. Franck GALVIN eLAbs (France)
RES: Brazilian Test Houses Accredited to do Anatel testing
This is a multi-part message in MIME format. Kevin, The CPqD could help you. Contact Mr. Victor Vellano (vell...@cpqd.com.br) or Mr. Wilson Aparecido (wil...@cpqd.com.br). The phone is +55 19 3705-7097. Regards Sérgio L. Rocha Loures IC SC QE L - Laboratório de qualificação Quality and Engineering - Supply Chain SIEMENS Tel: +55 41 341-5898 Fax: +55 41 341-5058 sergioro...@siemens.com.br Minha opinião e não necessariamente a do meu empregador. De: Kevin Harris [mailto:kevinharr...@dsc.com] Enviada em: quarta-feira, 7 de maio de 2003 13:20 Para: EMC-PSTC (E-mail) Assunto: Brazilian Test Houses Accredited to do Anatel testing Dear Group, Could any of you who have worked with a test house in Brazil that is accredited to do Anatel testing (and that you are happy with) forward me the contact details of that test house off line please Thank you Kevin Harris 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Title: RES: Brazilian Test Houses Accredited to do Anatel testing Kevin, The CPqD could help you. Contact Mr. Victor Vellano (vell...@cpqd.com.br) or Mr. Wilson Aparecido (wil...@cpqd.com.br). The phone is +55 19 3705-7097. Regards Sérgio L. Rocha Loures IC SC QE L - Laboratório de qualificação Quality and Engineering - Supply Chain SIEMENS Tel: +55 41 341-5898 Fax: +55 41 341-5058 sergioro...@siemens.com.br Minha opinião e não necessariamente a do meu empregador. -Mensagem original- De: Kevin Harris [mailto:kevinharr...@dsc.com] Enviada em: quarta-feira, 7 de maio de 2003 13:20 Para: EMC-PSTC (E-mail) Assunto: Brazilian Test Houses Accredited to do Anatel testing Dear Group, Could any of you who have worked with a test house in Brazil that is accredited to do Anatel testing (and that you are happy with) forward me the contact details of that test house off line please Thank you Kevin Harris --- 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Privacy Disclaimer.txt Description: Binary data
Acoustic Noise Level
Does anyone know of a recommended maximum acoustic noise level for a laboratory? I'm not looking for a regulatory level, but a recommended maximum level that will allow employees in the lab to carry out normal activities without the noise causing undue problems with their productivity. Richard Woods Sensormatic Electronics Tyco International 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: NEW EMC DIRECTIVE
I read in !emc-pstc that Gordon,Ian ian.gor...@bocedwards.com wrote (in E1BA0362B28ED211A1E80008C71EA3060206FBE3@EXC_EAS01) about 'NEW EMC DIRECTIVE' on Thu, 8 May 2003: Does anyone know what a ready-made connection device is? A cable with connectors attached, offered for general sale. A special cable, made for a particular site, comes under the new provisions for 'one-offs' (a term not used in the Directive, of course). I'm sure there are valuable prizes offered within the Commission, for 'the most obscure text of the month'. (;-) -- 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: Harmonized Standard
The 300 386 is somehow a generic standard which is not harmonized within the EU and therefor if you use it you have to take a notified body on board. But in case of the GSM/GPRS modem the 301 489-7 is applicable and this one is harmonized. So the opinion os a notified body is not mandatory. Regards, Oliver -Original Message- From: Stone, Richard A (Richard) [SMTP:rsto...@lucent.com] Sent: Thursday, May 08, 2003 2:37 PM To: 'Kneip, Oliver' Subject: RE: Harmonized Standard what about 300386-2: 97 and now 300386:2001? for Telecommnuciations...should be included I thought. thnak you, Richard, -Original Message- From: Kneip, Oliver [mailto:oliver.kn...@ict.cetecom.de] Sent: Thursday, May 08, 2003 5:28 AM To: 'Kirk Thomas'; emc-p...@majordomo.ieee.org Subject: RE: Harmonized Standard The four essential requirements according to the RTTE Directive are: RF: EN 301 511 EMC: EN 301 489-7 Health: EN 50360 Safety: EN 60950 You may be able to show compliance with the 301 511 if your modem is already tested according to the GCF stanadard TS51.010 or the apropriate PTCRB standard. Best regards / Mit freundlichen Grüßen Oliver Kneip International Type Approval CETECOM ICT Services GmbH Partner for Market Access and Global Success Untertuerkheimer Str. 6-10 - 66117 Saarbruecken - Germany Tel.: +49 (0) 681 5 98 87 25 Fax: +49 (0) 681 5 98 87 75 E-Mail: oliver.kn...@ict.cetecom.de Visit us in the Internet http://www.cetecom-ict.de -Original Message- From: Kirk Thomas [SMTP:k...@cclab.com] Sent: Tuesday, May 06, 2003 12:37 AM To: emc-p...@majordomo.ieee.org Subject:Harmonized Standard I have a GSM/GPRS modem that has been certified under part 24E, and now I am looking for a harmonized standard to test against for Europe. Any suggestions. Thanks for your assistance, Kirk Thomas --- 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc --- 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Fly-back Switched-Mode Power Supplies
All, I wanted to try and get a feel for how many Fly-back SMPS are being designed these days. Are they used frequently in today's designs? 1. Are they typically used for multiple voltage rail output? 2. Typically higher, or lower current applications? 3. Do people have the RF Emissions figured out on them? or are people struggling? Any information, personal experiences, etc. would be greatly appreciated. Thank you. Best Regards, Scott Mee Johnson Controls Inc. Automotive Systems Group EMC Product Compliance 616.394.2565 scott@jci.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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
USB Interface
Dear All Where can I find a document regarding the international standard for USB interfaces? Does a computer USB interface meet the power limited criteria in IEC 60950? Peter _ Do you Yahoo!? The New Yahoo! Search http://us.rd.yah o.com/search/mailsig/*http://search.yahoo.com - Faster. Easier. Bingo.
RE: Correction factors
From: Franck GALVIN [mailto:franck.gal...@e-labs.fr] Sent: Tuesday, May 06, 2003 8:36 AM To: emc-p...@majordomo.ieee.org Subject: Correction factors Dear all, I perform conducted or radiated emission test with HP8594EM spectrum analyser or HP8656A receiver. To not have measurements errors I must enter correction factors (antenna or LISN, cable and other ...). My questions are: 1/ When you enter data to antenna factors for example, you write ''frequency'', ''amplitude'' and what about ''frequency scale'' (log or lin) ? 2/ Does frequency scale depend of correction type (cable, amplifier, antenna, LISN, transient limiter...)? Thanks in advance for your answers. Franck GALVIN eLAbs (France) Franck: I have somewhat older HP hardware software than your setup, but here's how the HP software works for me. When you are creating an equipment calibration table, you are asked to declare the number of data pairs (frequency amplitude) that define a curve which represents the response of the equipment. For example, an external attenuator might be defined by only two pairs, say, 0.01 / 20 18000 / 20 (data units are MHz dB). However, for something like a current probe or antenna, you might have a file of 50 pairs or so. You also choose LIN or LOG, which specifies the interpolation method used between the data points. I always choose LOG, since the completed emission plots usually use a logarithmic frequency scale. I don't think this makes any practical difference, but then I always enter enough data pairs so that the delta dB from one pair to another is 1 dB or less. After setting up a calibration file (you need a transducer, cable and limit set of files), be sure to test the expected accuracy by injecting a known signal into the coax cable head-end to verify that the factors are being added correctly to the raw spectrum analyzer data. IIRC, the HP convention was to always subtract the correction factor value from the raw data. Thus, you have to make the attenuator data a negative number, so that subtracting a negative yields adding a positive! (Hope you don't think I'm joking!!! Read you software manual very carefully.) Regards, Ed Ed Price ed.pr...@cubic.com NARTE Certified EMC Engineer Technician Electromagnetic Compatibility Lab Cubic Defense Systems San Diego, CA USA 858-505-2780 (Voice) 858-505-1583 (Fax) Military Avionics EMC Is Our Specialty
RE: Harmonized Standard
The four essential requirements according to the RTTE Directive are: RF: EN 301 511 EMC: EN 301 489-7 Health: EN 50360 Safety: EN 60950 You may be able to show compliance with the 301 511 if your modem is already tested according to the GCF stanadard TS51.010 or the apropriate PTCRB standard. Best regards / Mit freundlichen Grüßen Oliver Kneip International Type Approval CETECOM ICT Services GmbH Partner for Market Access and Global Success Untertuerkheimer Str. 6-10 - 66117 Saarbruecken - Germany Tel.: +49 (0) 681 5 98 87 25 Fax: +49 (0) 681 5 98 87 75 E-Mail: oliver.kn...@ict.cetecom.de Visit us in the Internet http://www.cetecom-ict.de -Original Message- From: Kirk Thomas [SMTP:k...@cclab.com] Sent: Tuesday, May 06, 2003 12:37 AM To: emc-p...@majordomo.ieee.org Subject: Harmonized Standard I have a GSM/GPRS modem that has been certified under part 24E, and now I am looking for a harmonized standard to test against for Europe. Any suggestions. Thanks for your assistance, Kirk Thomas --- 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: AC outlet max current
Hi Bob, Indeed, the code allows 100% of the branch circuit current rating to be used for noncontinuous loads. However, I don't believe this applies to plug-and-cord loads. The NEC seems pretty explicit in this regard. Have you seen an exception to table 210.21(B)(2) and section 210.23(a)? Why would plug-and-cord loads be treated separately if they could be classified as continuous or noncontinuous anyway? Best regards, JP Hare From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Robert Johnson Sent: Monday, May 05, 2003 10:48 AM To: 'JP Hare'; emc-p...@majordomo.ieee.org Subject: RE: AC outlet max current A noncontinuous load is permitted to use 100% of the circuit rating. Only continuous loads need the derating. Bob Johnson ITE Safety From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org] On Behalf Of JP Hare Sent: Thursday, May 01, 2003 12:20 PM To: Gonzalez, Kenneth P (Rocky); emc-p...@majordomo.ieee.org Subject: RE: AC outlet max current Hi Rocky, Article 210 of the NEC lists the requirements for branch circuits and associated receptacles. Table 210.21(B)(2) shows the receptacle load limits and section 210.23 discusses the permissible loads in more detail. On a related topic, I recently had a discussion with a colleague regarding the plug for a certain North American hand-held hair dryer. The ratings on it are 1875 watts, 125 volts. That puts it right at a 15 amps. However the plug is an ungrounded polarized NEMA 1-15 type with a built in GFIC. This allows it to be plugged into any standard 15 amp receptacle that you find in the US. Knowing the 80% requirement for cord-and-plug-connected loads, I questioned how an NRTL could list this device. It would seem that a 5-20 plug (perpendicular blades) would be necessary so that a 20 amp receptacle would have to be used. Our thoughts ranged from the cynical money talks theory to a more logically based engineering justification. (The code says that bathroom receptacles must be on their own 20 amp branch with no other receptacles.) But we never came to a final conclusion on why an NRTL would allow a 15 amp plug-and-cord load to be plugged into a 15 amp receptacle. Maybe our peers on the EMC-PSTC listserv have some ideas? Regards, J.P. Hare 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
safety agency product file
Dear all, Can anyone tell me the correct way of doing this things ? Q1.Normally for product safety agency file,is the customer or the local safety agency should send the file to the manufacturer ? Q2.Or it is the manufacturer's responsibility to get the product safety agency file from the customer / local safety agency rep ? Your replies to this question is much appreciated. Regards, Alice _ http://uk.rd.yahoo.com/evt=8613/*http //uk.yahoo.com/mail/tagline_plus/?http: /uk.promotions.yahoo.com/yplus/btoffer.html Yahoo! Plus - For a better Internet experience
RE: CE or e-mark? Was pls help me
Hi Zhang, If the product is meant for use on vehicles, then you should have it 'e'- marked. The appropriate EMC directive for the e-mark is 95/54/EC and should be available on the internet free. Depending on the what the lamp is for, there may be additional requirements in the SAE standards. To the best of my knowledge, the directive does not require conducted emissions to be performed but some vehicle manufacturers may insist on it as the directive appears to have a number of shortcomings, which I am told are being addressed. Best regards - Chris Chileshe --- (Own Opinions Only etc etc) From: qiaofeng.zh...@nb.chn.tuv.com [SMTP:qiaofeng.zh...@nb.chn.tuv.com] Sent: Thursday, May 08, 2003 5:52 AM To: emc-p...@majordomo.ieee.org Subject:pls help me There is a fluorescent lamp luminaire used in cars which is to be certification.My questions is can it only apply for emc-ce or it shall apply for E-mark and I also want to know the standards of this produce for EMC and E-mark respectively. thanks for any feedback. Zhang qiaofeng 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This e-mail has been scanned for all viruses by Star Internet. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk This e-mail has been scanned for all viruses by Star Internet. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: NEW EMC DIRECTIVE
Yes. In common parlance it is a ready made cable (as opposed to a cable assembled in situ); e.g. a network cable, USB cable, printer cable, or any other type of cable procured with connectors already assembled. Best regards, Neil R. Barker Compliance Engineering Manager e2v technologies ltd Waterhouse Lane Chelmsford Essex CM1 2QU U.K. Tel: +44 (01245) 453616 Fax: +44 (01245) 453410 E-mail: neil.bar...@e2vtechnologies.com -Original Message- From: Gordon,Ian [mailto:ian.gor...@bocedwards.com] Sent: 08 May 2003 09:23 To: 'IEEE EMC-PSTC GROUP' Subject: NEW EMC DIRECTIVE All There is a review of the new EMC directive available written by Alan McHale of RFI Ltd. available at the following website: http://www.compliance-club.com/article.php?sid=137mode=order =0. The author refers to ready-made connection devices and indicated that these now fall within the scope of the directive. Does anyone know what a ready-made connection device is? Ian Gordon 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: Correction factors
On Tue, 6 May 2003 17:35:49 +0200, Franck GALVIN franck.gal...@e-labs.fr wrote: I perform conducted or radiated emission test with HP8594EM spectrum analyser or HP8656A receiver. To not have measurements errors I must enter correction factors (antenna or LISN, cable and other .). My questions are: 1/ When you enter data to antenna factors for example, you write ''frequency'', ''amplitude'' and what about ''frequency scale'' (log or lin) ? 2/ Does frequency scale depend of correction type (cable, amplifier, antenna, LISN, transient limiter.)? I'm familiar with the 8590-series analyzers, so I'll comment about that one. The 'Frequency Scale' feature allows you to accurately specify a limit line/correction factor that is linear with log(frequency) by using only two data points. Without this feature, you have to interpolate many data points between the start and stop frequency for an accurate limit line. The scale mode has no benefit if the limit line/correction factor is flat with frequency. The obvious example is to draw the CISPR 11/CISPR 22 Class B Conducted emission limit line from 0.15-0.50MHz. The limit line entries using the 'log' scale mode: 0.15 66dBuV SLOPE 0.50 56dBuV FLAT The limit line entries using the 'linear' scale mode (2dB increments in amplitude): 0.150 66dBuV SLOPE 0.191 64dBuV SLOPE 0.243 62dBuV SLOPE 0.309 60dBuV SLOPE 0.393 58dBuV SLOPE 0.500 56dBuV SLOPE As far as correction factors are concerned, use the scale mode that best fits your accuracy/data point requirements. 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
ESD test standard - present CDV - justification for changes
Dear Jim, Thanks for taking the time to read the standard. Let me expand on the justification of the changes. Table of Content 1) New current target 2) On the correlation problems with ESD testing 3) Specific answers to your points (marked by ### in your email) David Pommerenke University Missouri Rolla 1) New current target = If you accept that a larger calibration bandwidth is needed (see my point (2)) then there is a need for a new target. The present target is only useful up to 1 GHz. Above 1 GHz targets that are build the same way differ a lot. The present target also has a high input impedance in the RF range (it reaches kOhm), so that the current is disturbed relative to a large ground plane. Now a target also needs to be calibrated, as one needs to determine if it fulfills its specification. This requires a either a network analyzer or a spectrum analyzer with tracking or a signal generator and a power meter. or a TDR in TDT arrangement. The good news is that this is only relevant for the manufacturer of the target, NOT FOR THE USER of the target. Now the construction of the new target is quite simple. I have made about 10 in the last years. There are also other constructions possible that are more simple. Note the target information is information, i.e., everyone can make their own target, as long as it measures correctly the construction does not matter. 2) On the correlation problems with ESD testing. Every ESD test is a combination of many physical tests. Disruption or disturbance can be caused by: a) dielectric breakdown b) Current (ohmic loss - thermal) c) Induction - voltage - oxid breakdown d) Induction - current - thermal e) Induction - disturbance f) Ohmic voltage drop - disturbance g) Inductive voltage drop - disturbance And there are many more. For each of them the question: - Is an ESD test reproducible? Will have a different answer. For example, the dielectric breakdown is strongly related to the voltage, and the voltage of ESD generators is well controlled. Now modern ICs can react to pulses of about 50ps width (just look at your PC). Now, induction is a differentiation process, e.g., it is a high-pass filter. The high frequency components of the current and the transient fields will dominate the circuit response (in this case: mostly disturbance, not destruction). If you compare the high frequency components of different ESD generator currents and fields, you will see differences larger than 20dB. As a consequence, failure levels for fast ICs (disturbance) will vary as much as 1:5 if ONLY the ESD generator is changed. This has been observed in many Industry applications and tests and is the main driving force for improving the standard. We are in the process of publishing results of such correlation under well controlled conditions and the analysis of the reasons (correlation: ESD generator parameters vs. disturbance failure levels). The paper is in the review-process of the IEEE Transactions on EMC. I will not post it here while it is in review, but I can email a pre-print version to interested individuals. From: Jim Ericson [mailto:jde...@nas.com] Sent: Tuesday, May 06, 2003 12:02 AM To: Pommerenke, David; emcpost Subject: Re: current-sensing transducer photos David: Thank you for the Committee Draft Version of the new ESD Standard. The committee is to be commended for producing such a thoroughly researched document that aims at improving test reproducibility of such a complex event as electrostatic discharge. While I am personally fascinated with the scientific aspects of ESD, I must say that the CDV rather took my breath away ... from the standpoint of ESD Current Target/Conical Adapter Line mechanical complexity ... to the cost implications for the EMC Laboratories and their clients. 4 GHz Current Targets, Network Analyzers, Oscilloscopes, and Electrostatic Voltmeters are far from trivial expenditures for any Laboratory. # Most test labs neither build ESD-current targets, not do they calibrate ESD generators themselves. For ESD-target and ESD-generator manufacturers, it is quire reasonable to expect that they can characterize the device they are building or calibrating. # I guess what I am missing is the underlying justification of need to change from the current 1 GHz approach. ## Please see my text above. There are more references that should be part of the CDV, they may also be in a justification document.# I don't mean to beat this subject into a dead horse. I am not qualified to do that (even if I wanted to) either from experience or education. I would only make the following comments from my perceptions based on 7 years with an EMC Lab, and 18 years building, testing, and evaluating Silicon for a couple of semiconductor manufacturers: 1. In the several years of performing (or directly
reinforced insulation - EN60950
Dear colleagues, As part of a PCB design required to be compliant with EN60950, we want to use the configuration described below, to be able to relax the traces separation. The circuit intended to become SELV is accessible to the operator. Questions: 1. Is the combination of Basic Insulation + FuseTransorb(15V) equivalent to Reinforced Insulation? 2. Does the transorb have to comply with a specific EN safety standard (like one applicable to Y caps)? Thanks, Alexandru Guidea CAE Inc. Canada Basic Insulation | | ELV||---FUSE--SELV (??) | T | R A N S O R B | | GND (EARTH) 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: Harmonized Standard
Kirk, In Europe the harmonized standards for GSM/GPRS are contained in the Official Journal of the European Communities dated 9.3.2002 ref 2002/C 62/03. I recommend you strongly to get your product approved by the Global Certification Forum which has requirements far more above the RTTE directive. Visit the GCF site for more details : http://gcf.gsm.org/ Pierre-Marie Sophia Certification and Environmental Labs Intel Corporation Senior Approval Engineer From: Kirk Thomas [mailto:k...@cclab.com] Sent: mardi 6 mai 2003 00:37 To: emc-p...@majordomo.ieee.org Subject: Harmonized Standard I have a GSM/GPRS modem that has been certified under part 24E, and now I am looking for a harmonized standard to test against for Europe. Any suggestions. Thanks for your assistance, Kirk Thomas 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
CISPR 16-4.
Dear all, Does anyone know if CISPR 16-4 (Uncertainty in EMC measurements) is called up by any testing standard, or whether it is to be called up in the future? Otherwise, it appears that this standard is an interesting read, but nothing more. Thanks Dr Luke Turnbull Principal EMC Engineer TRW Conekt Stratford Road Solihull B90 4GW Tel: +44 (0)121.627.3966 Fax:+44 (0)121.627.4353 email: luke.turnb...@trw.com web: www.trw.com/conekt/ 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: NEW EMC DIRECTIVE
An interface cable. They couldn't just use a simple word. Ari. -Original Message- From: ext Gordon,Ian [mailto:ian.gor...@bocedwards.com] Sent: Thursday, May 08, 2003 11:23 AM To: 'IEEE EMC-PSTC GROUP' Subject: NEW EMC DIRECTIVE All There is a review of the new EMC directive available written by Alan McHale of RFI Ltd. available at the following website: http://www.compliance-club.com/article.php?sid=137mode=order =0. The author refers to ready-made connection devices and indicated that these now fall within the scope of the directive. Does anyone know what a ready-made connection device is? Ian Gordon _ This e-mail has been scanned for viruses by the WorldCom Internet Managed Scanning Service - powered by MessageLabs. For further information visit http://www.worldcom.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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
NEW EMC DIRECTIVE
All There is a review of the new EMC directive available written by Alan McHale of RFI Ltd. available at the following website: http://www.compliance-club.com/article.php?sid=137mode=order=0. The author refers to ready-made connection devices and indicated that these now fall within the scope of the directive. Does anyone know what a ready-made connection device is? Ian Gordon _ This e-mail has been scanned for viruses by the WorldCom Internet Managed Scanning Service - powered by MessageLabs. For further information visit http://www.worldcom.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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
pls help me
There is a fluorescent lamp luminaire used in cars which is to be certification.My questions is can it only apply for emc-ce or it shall apply for E-mark and I also want to know the standards of this produce for EMC and E-mark respectively. thanks for any feedback. Zhang qiaofeng 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 Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
