Flickermeter (EN 61000-3-3) Question
Greetings, I've got a few questions about flickermeters and EN 61000-3-3. If anyone has experience using and perhaps calibrating flickermeters, please e-mail or call. I would like to send a manuscript for a peer review and to answer some questions I have. Thanks. /\ | Martin Rowe | / \ | Senior Technical Editor | /\ /\ | Test Measurement World | / \/ \/\ | voice 617-558-4426 |/\ /\ / \/ | fax 617-928-4426 | \/ \/ | e-mail m.r...@ieee.org | \ / | http://www.tmworld.com |\/ --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
CISPR 14-1 (2000-03) and IEC 60076-3 (2000-03)
Group, The biweekly update from IEC just arrived. The following may be of interest. You can get the update by sending e-mail to c...@iec.ch. /\ | Martin Rowe | / \ | Senior Technical Editor | /\ /\ | Test Measurement World | / \/ \/\ | voice 617-558-4426 |/\ /\ / \/ | fax 617-928-4426 | \/ \/ | e-mail m.r...@ieee.org | \ / | http://www.tmworld.com |\/ CISPR 14-1 (2000-03) - Electromagnetic compatibility - Requirements for household appliances, electric tools and similar apparatus - Part 1: Emission Applies to the conduction and the radiation of radio-frequency disturbances from appliances whose main functions are performed by motors and switching or regulating devices, unless the r.f. energy is intentionally generated or intended for illumination. Includes such equipment as: household electrical appliances, electric tools, regulating controls using semiconductor devices, motor-driven electromedical apparatus, electric toys, automatic dispensing machines as well as cinema or slide projectors. According to M.C. Vrolijk (Nederlandse Philips Bedrijven BV), secretary of the subcommittee F of CISPR (Interference relating to household appliances, tools, lighting equipment and similar apparatus) the first edition of CISPR 14 in 1975 was, as one of the first international standards on radio interferences, trend-setting in the protection of radio services. In fact limits for three phenomena were described, related to the unwanted radio emissions from household appliances and portable tools: - on terminal voltage (from 150 kHz to 30 MHz) on the mains cord, - on potential radiated power (from 30 MHz to 300 MHz) from all electric cords, and - on discontinuous disturbaces on the mains cord, the so-called clicks. This approach has proved to be valid for a quarter of a century, and is still the basis of this 4th edition. Vrolijk adds that it may be expected that this new edition of CISPR 14-1 will also be adopted, or referred to, in legislation on radio disturbances in many countries all over the world. This way the new edition will contribute to the elimination of technical trade barriers and support an open global market. ICS code: 33.100.10 CIS/F 133 pp. CHF 184,00 IEC 60076-3 (2000-03) - Power transformers - Part 3: Insulation levels, dielectric tests and external clearances in air Gives insulation requirements for power transformers and the corresponding insulation tests for specific windings and their terminals. Includes appendices on: partial discharge measurements during induced overvoltage withstand tests on transformers; overvoltage transferred from a high-voltage winding to a low-voltage winding; information to be supplied with enquiries and orders. ICS code: 29.180 TC 14 107 pp. CHF 156,00 --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
List of upcoming dates for standards
Does anyone know of a web site that lists when the various EMC standards will go into effect? If not, would such a web age be useful? /\ | Martin Rowe | / \ | Senior Technical Editor | /\ /\ | Test Measurement World | / \/ \/\ | voice 617-558-4426 |/\ /\ / \/ | fax 617-928-4426 | \/ \/ | e-mail m.r...@ieee.org | \ / | http://www.tmworld.com |\/ --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Re: modest proposal
As perhaps the only member of this list who works for a publishing company, let me explain why a designed language won't work. * We, the ugly Americans, want the world to conform to our native language. We're too lazy, stubborn, and arrogant to learn another language. * A designed language with clear rules, spelling, and punctuation will throw lots of copy editors out of work. * There will always be new feelings, expressions, and physical objects that the designers of the universal language either didn't think we needed or that have come into existance after the adoption of the designed language. Languages change slowly over time. Eventually, the designed language will look like any other language. Languages change faster than editors think they do. I'll bet every one of you has said something like I need to access the data... Many magazine articles, that have supposedly pass through editors, contain the use of the word access as a verb. Around here, I'd have to write I need to gain access to the data because officially, the word access is a noun. Each of you would know what I mean if I were to use access as a verb, but professional editors will get confused and insist on using the word properly. So the bottom line is that speakers of a designed language will slowly change the language to where an accepted useage violates the rules anyway. * A clear language will mean that lawyers will have no choice but to write in lay terms. If the average person can understand a legal writing or a contract, then we won't hire lawyers as much as we do now. Because most politicians start out as lawyers... (you get the idea, I don't need *any* language to explain). /\ | Martin Rowe | / \ | Senior Technical Editor | /\ /\ | Test Measurement World | / \/ \/\ | voice 617-558-4426 |/\ /\ / \/ | fax 617-928-4426 | \/ \/ | e-mail m.r...@ieee.org | \ / | http://www.tmworld.com |\/ --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
The wisdom behind all these standrads
I've been reading messages from this list for several months, and I see many questions about how to comply with the long list of EMC standards. Yet, I can't recall anyone ever questioning the appropriateness of any standard. That is, should the standand add value to a product or to those who use it? Is it that the EMC engineer's place is not to question the wisdom of a standard's value, but simply to make products with those standards, whether or not we agree with the intent of those standards? That's not to say that these regulations are bad. Maybe they're good because they make the world a better place for those who use electronic products. Just wondering. /\ | Martin Rowe | / \ | Senior Technical Editor | /\ /\ | Test Measurement World | / \/ \/\ | voice 617-558-4426 |/\ /\ / \/ | fax 617-928-4426 | \/ \/ | e-mail m.r...@ieee.org | \ / | http://www.tmworld.com |\/ --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Re: Ambient Cancellation Device for OATS
The company is CASSPER www.cassper.com. The system is sold through EMC Test Systems www.emctest.com. Several members of this list have seen the system. They say the demos are impressive. But, those who saw the demo remain skeptical. /\ | Martin Rowe | / \ | Senior Technical Editor | /\ /\ | Test Measurement World | / \/ \/\ | voice 617-558-4426 |/\ /\ / \/ | fax 617-928-4426 | \/ \/ | e-mail m.r...@ieee.org | \ / | http://www.tmworld.com |\/ -- From: Grasso, Charles (Chaz) gra...@louisville.stortek.com To: 'emc-p...@majordomo.ieee.org' Subject: Ambient Cancellation Device for OATS Date: Tuesday, March 21, 2000 01:48 PM Hello - A little while ago there was some discussion of a company designing an ambient cancelation device. Question: Does anyone remember the company?? --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
SAF: Insulation resistance and hipot tests
Group, A reader asked about the order of performing safety tests. Should he perform insulation resistance tests before or after hipot tests? The reader didn't say what type of product he's testing, but I can ask. Thanks, /\ | Martin Rowe | / \ | Senior Technical Editor | /\ /\ | Test Measurement World | / \/ \/\ | voice 617-558-4426 |/\ /\ / \/ | fax 617-928-4426 | \/ \/ | e-mail m.r...@ieee.org | \ / | http://www.tmworld.com |\/ --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Re: SAE Standards
SAE J1113 series cover immunity of engine control units. I'm writing an article that summarazes the tests. It will apprear in the February 15 issue. You can download them at www.sae.org (PDF format, but each test spec (there are about 20) costs $59 to download. I downloaded three of the specs for my article. /\ | Martin Rowe | / \ | Senior Technical Editor | /\ /\ | Test Measurement World | / \/ \/\ | voice 617-558-4426 |/\ /\ / \/ | fax 617-928-4426 | \/ \/ | e-mail m.r...@ieee.org | \ / | http://www.tmworld.com |\/ -- From: rehel...@mmm.com To: emc-p...@majordomo.ieee.org Subject: SAE Standards Date: Monday, January 24, 2000 10:59 AM Could anyone tell me what SAE standards govern product EMC emissions and immunity for after market devices? These would be devices installed into vehicles after the vehicle has been sold. The device in question is a guidance system for snowplows enabling them to remain on the road in the presence of deep snow. The device is an 'advisory only' system for the driver. It does not control any vehicle function. If there are no specific SAE standards, which SAE standards would a conscientious manufacturer adhere to? - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
E-Field Probe Question
I need clarification on a spec for an e-field probe. The spec is Tr less than 10 Hz. What is Tr? The probe is specified in SAE J1113/27 Electromagnetic Compatibility Measurements Procedure for Vehicle Components: Part 27:Immunity to Radiated Electromagnetic Fields-Reverberation Method. Thanks, /\ | Martin Rowe | / \ | Senior Technical Editor | /\ /\ | Test Measurement World | / \/ \/\ | voice 617-558-4426 |/\ /\ / \/ | fax 617-928-4426 | \/ \/ | e-mail m.r...@ieee.org | \ / | http://www.tmworld.com |\/ - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Re: Y3K
Our magazine's standard is k for both 1000 and for 1024. So, 1024 bytes appears as 1 kbyte (we always spell out byte. I suppose we'd use k for Boltzmann's constant. Upper case K is for Kelvin. We use M for mega (1 million) and m for milli (1/1000). We also use M for the binary, as in 1 Mbytes. /\ | Martin Rowe | / \ | Senior Technical Editor | /\ /\ | Test Measurement World | / \/ \/\ | voice 617-558-4426 |/\ /\ / \/ | fax 617-928-4426 | \/ \/ | e-mail m.r...@ieee.org | \ / | http://www.tmworld.com |\/ -- According to IEEE's standard dictionary of Electrical and Electronics Terms, there are two meanings for k (lower case) and two for K (upper case): K:cathode (vacuum tube) K:kelvin k:kilo k:Bolzmann's constant Note: They do NOT list M (caps) as Mega, but do list m (lower case) as milli. The 1998 EMC Encyclopedia shows M = mega and m = milli. Mike Hopkins KeyTek - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Re: Piezo lighters
Just remember to burn off the lighter fuel first. Do that outside. You may also have to file down any burrs in the outer tube, too. Sparks will take the shortest distance they can find to discharge. Scrape off some paint from the outer tube to attach a ground return wire. Solder it in place if you can. I used one of these barbeque lighters last year for a sixth grade science project to show that sparks generate broadband radio waves. /\ | Martin Rowe | / \ | Senior Technical Editor | /\ /\ | Test Measurement World | / \/ \/\ | voice 617-558-4426 |/\ /\ / \/ | fax 617-928-4426 | \/ \/ | e-mail m.r...@ieee.org | \ / | http://www.tmworld.com |\/ -- From: Lacey,Scott sla...@foxboro.com To: 'carlos.perk...@eu.effem.com' Cc: 'emc-p...@ieee.org' Subject: RE: Piezo lighters Date: Thursday, December 16, 1999 08:18 AM Carlos, I am assuming that you want to know the maximum possible developed voltage, rather than the voltage just prior to arcing. I would use an oscilloscope (preferably digital) and a high-voltage oscilloscope probe (100:1). I expect that you will see in the range of 6 to 8 kV. You must widen or eliminate the spark gap in order to see the maximum voltage. Your best bet would be to hacksaw the outer tube until you can access the center electrode. An ignitor for a propane barbecue grill is almost identical, and comes equipped with wires, in case you are just looking for generic values rather than those of a specific unit. Have Fun! Scott Lacey - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
How to recover from yesterday's virus
Several members of this list have contacted me asking how to recover damaged files from the unzipped_files.exe virus. Here's how I did it. I had Norton Utilities running on my PC at the time of the virus. Norton creates an additional recycle bin called the protected bin. Open the Norton Utilities integrator then open the Unerase wizard. You'll get three choices. Select Find all protected files on local drives. Norton will need a few seconds to find the files. Then you get a list of all the protected files. Select your files and click Recover. Windows will ask you if you want to overwrite the file with 0 bytes with the protected file. Click Yes. I sometimes got an error box saying Unable to continue because another application has been writing to volume. You may want to close other programs and retry this operation. Just hit Retry and your file will be recoverd. Or, close all other windows apps and you won't get the error message. If you didn't have Norton installed on your system when the virus struck, then you may or may not be able to recover your files. I'm not sure. If someone installs Norton and tries to recover the files, please let me know if you were successful or not. So what did I learn from spending most of a day trying to figure out how to recover? * Back up your files. At the very least, make copies of you Word and Excel files in ZIP format. I keep archived files in zip format and they were not damaged. * IT people are rather useless. They had me uninstall and reinstall MS Office 97, which did nothing. * Never operate a PC without Norton Utilities. I use it both at home and at work. * Use a mail client by someone other than Microsoft. Most of these e-mail based viruses use VBA code to do their dmaage or to find new addresses. In fact avoid Microsoft wherever possible. Heck, run Wordperfect. That's what I do at home. Now, back to your local EMC discussion. /\ | Martin Rowe | / \ | Senior Technical Editor | /\ /\ | Test Measurement World | / \/ \/\ | voice 617-558-4426 |/\ /\ / \/ | fax 617-558-4470 | \/ \/ | e-mail m.r...@ieee.org | \ / | http://www.tmworld.com |\/ - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
***Virus Warning*** Re: IEC 61000-4-28
This morning, I got hit with the latest worm virus. Somebody on this listerver has or had it. I received a message with an attachement called zipped_files.exe and unkowingly opened it. The virust replaced all of MS office files (Word, Excel, etc.) files with blank files, 0 kB. The massage subject line was Re: IEC 61000-4-28, a message I posted ti this group a few days ago. The From field contained the name Mario Guiseppe or something close to that. I had no backus of my current work but fortunately I need only spend about 1 hour retyping for at least I ahve a paper backup. Has this happened a week later, I would have been much worse off because my next issue's of articles would have been much farther along. /\ | Martin Rowe | / \ | Senior Technical Editor | /\ /\ | Test Measurement World | / \/ \/\ | voice 617-558-4426 |/\ /\ / \/ | fax 617-558-4470 | \/ \/ | e-mail m.r...@ieee.org | \ / | http://www.tmworld.com |\/ - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
IEC 61000-4-28
I received the following announcement from IEC: IEC 61000-4-28 (1999-11) - Electromagnetic compatibility (EMC) - Part 4-28: Testing and measurement techniques - Variation of power frequency, immunity test Establishes a reference for evaluating the immunity of electric and electronic equipment when subjected to variations of the power frequency. Only conducted phenomena are considered, including immunity tests for equipment connected to public and industrial networks. ICS code: 33.100.20 - SC 77A - 27 pp. - CHF 55.00 Does anyone care about IEC standards? By that, I mean does anyone make an effort to comply with a standard that's not published in the OJ and therefore is not required for CE marking? Might individual countries require compliance? Thanks, /\ | Martin Rowe | / \ | Senior Technical Editor | /\ /\ | Test Measurement World | / \/ \/\ | voice 617-558-4426 |/\ /\ / \/ | fax 617-558-4470 | \/ \/ | e-mail m.r...@ieee.org | \ / | http://www.tmworld.com |\/ - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
IEEE-EMC CD-ROM -- Thanks to all
Thanks to the 25 people who responded to my offer for a CD-ROM with the 1996-1999 EMC Syposium Proceedings. Unfortunately, I have only one copy. Several of you asked where to buy a copy. You might try the IEEE EMC Society web page, www.emcs.org, or Mira Digital Publishing, phone +1 314-776-, fax +1 314-776-2276, e...@miracd.com. The CD-ROM is IEEE catalog number 99CH3621C. Several also asked about subscribing to Test Measurement World. See URL in my signature. Thanks, /\ | Martin Rowe | / \ | Senior Technical Editor | /\ /\ | Test Measurement World | / \/ \/\ | voice 617-558-4426 |/\ /\ / \/ | fax 617-558-4470 | \/ \/ | e-mail m.r...@ieee.org | \ / | http://www.tmworld.com |\/ - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
IEEE-EMC Symposium Proceedings CD-ROM
I have an extra copy of the IEEE-EMC Symposium proceedings from 1996-1999 on a CD-ROM. First person to send me your snail-mail address gets it. /\ | Martin Rowe | / \ | Senior Technical Editor | /\ /\ | Test Measurement World | / \/ \/\ | voice 617-558-4426 |/\ /\ / \/ | fax 617-558-4470 | \/ \/ | e-mail m.r...@ieee.org | \ / | http://www.tmworld.com |\/ - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Re: broadband/narrowband
The _Electrical Engineering Handbook_ (Editord by Richard C. Dorf, 1993) defines a broadband emission on page 934 as: An emission having a spectral distribution sufficiently broad in comparison to the response of a measuring receiver. So Werner is correct. /\ | Martin Rowe | / \ | Senior Technical Editor | /\ /\ | Test Measurement World | / \/ \/\ | voice 617-558-4426 |/\ /\ / \/ | fax 617-558-4470 | \/ \/ | e-mail m.r...@ieee.org | \ / | http://www.tmworld.com |\/ -- From: werner_schae...@hp-sonoma-om1.om.hp.com To: l...@tempest-inc.com Cc: emc-p...@majordomo.ieee.org Subject: Re: broadband/narrowband Date: Friday, October 08, 1999 04:44 PM The definition of a signal being narrowband or broadband is very simple: if a signal's spectrum EXCEEDS the measurement instrument's resolution bandwidth it is defined to be BROADBAND. In case a signal's spectrum is completely contained within the passband of the resolution bandwidth of the instrument (i.e. EMI receiver or spectrum analyzer), it is classified as a narrowband signal. PLEASE recognize that THE ONLY criteria for the determination of a signal being narrowband or broadband is the instruments resolution bandwidth. Thus if the bandwidth is changed, e.g. to a larger value, the signal could become a narrowband signal. This definition has a lot of problems to it but it is the official definition in CISPR and IEC publications. I hope, this helps. Best regards, Werner Schaefer Hewlett-Packard - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
EMI Measurements and DTV
My name is Martin Rowe, editor at Test Measurement World. I'm interested in learning about problems with radiated EMI measurements outdoors in the presence of digital television (DTV) broadcasts. Does anyone have experience in this matter? What sort of problems dies the 6-MHz flat spectrum of DTV cause? What can you do about it? Thanks, /\ | Martin Rowe | / \ | Senior Technical Editor | /\ /\ | Test Measurement World | / \/ \/\ | voice 617-558-4426 |/\ /\ / \/ | fax 617-558-4470 | \/ \/ | e-mail m.r...@ieee.org | \ / | http://www.tmworld.com |\/ - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
