crap they got me! Resume attached
This is a multi-part message in MIME format. Gary McInturff Resume.doc Money ran out and times up. I will be unsubscribing from the list from this e-mail in just a moment. If you wish to contact me garymcintu...@aol.com or 509 926 3053. I'll subscribe from home in a day or so - it opens a chance to get some golf in for a moment. Take care all Gary Title: crap they got me! Resume attached Gary McInturff Resume.doc Money ran out and times up. I will be unsubscribing from the list from this e-mail in just a moment. If you wish to contact me garymcintu...@aol.com or 509 926 3053. I'll subscribe from home in a day or so - it opens a chance to get some golf in for a moment. Take care all Gary Gary McInturff Resume.doc Description: Binary data
Re: Heat Sink Colour.
As a general rule of thumb, use polished aluminum fins (no finish) for high velocity forced air cooling (maximum thermal transfer to the airstream). Black anodized works well with more gentle airflow, and you would want a rough cast or sandblasted blackened finish when relying solely on natural convection. The rough surface increases both surface area and turbulence. scott Lacey On 9 May 2003 at 9:50, LEUNG YAT WAH DEREK wrote: 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 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
Regulatory body in UAE
Dear List, Who are the regulatory bodies in UAE for EMC, telecom and safety? Thanks in advance Hans Mellberg
RE: TEMPEST regulations
Alexandru, You might try the NSA in the US but will likely need to contact the Canadian equivalent (CSIS?) . I had placed an inquiry with the UK source and was advised that since I am in the US, they would not explore the release any docs and kindly supplied additional advice to contact the NSA. Might be the same kind of thing for Canadian distribution requests. Regards, Kaz Gawrzyjal Dell From: Price, Ed [mailto:ed.pr...@cubic.com] Sent: Friday, May 09, 2003 12:32 PM To: 'Alexandru Guidea'; 'emc-p...@majordomo.ieee.org' Subject: RE: TEMPEST regulations -Original Message- From: Alexandru Guidea [ mailto:gui...@cae.com] Sent: Friday, May 09, 2003 8:35 AM To: 'emc-p...@majordomo.ieee.org' Subject: TEMPEST regulations Dear colleagues, I am looking to procure an UK (or NATO) TEMPEST standard/regulation -- JSP 480. Any help in finding a source for this doc will be greatly appreciated. Whether some confidentiality restrictions exist, they can be resolved by our library, as it has similar docs. Thanks, Guidea Alexandru CAE Inc. Montreal, CANADA Alexandru: A JSP is a British Ministry of Defence (MoD) Joint Services Publication. You might try the MoD homepage at: http://www.dstan.mod.uk/index.html but many Comsec documents are classified, so you might have trouble getting a copy (as in not exactly a pdf on the web g). 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: NEW EMC DIRECTIVE
I agree. It seems rather silly to specify a mains or other cable included with the equipment in the DoC or to have separate DoCs for each cable. Ralph McDiarmid, AScT Compliance Engineering Group Xantrex Technology Inc. www.xantrex.com tel: (604) 422 2622 fax: (604) 420 1591 From: Gordon,Ian [mailto:ian.gor...@bocedwards.com] Sent: May 9, 2003 2:10 AM To: 'John Woodgate'; emc-p...@majordomo.ieee.org Subject: RE: NEW EMC DIRECTIVE John et al How can the authors of the directive reconcile the concept of benign equipment (which are outside the scope of the directive) with the requirement to include, for example, a mains lead? Does this mean that if leads are sold separately they must have a D of C? I assume that a lead provided with a piece of equipment would be covered by the D of C for that equipment. Ian Gordon -Original Message- From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: 08 May 2003 17:50 To: emc-p...@majordomo.ieee.org Subject: 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 _ 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
RE: TEMPEST regulations
-Original Message- From: Alexandru Guidea [ mailto:gui...@cae.com] Sent: Friday, May 09, 2003 8:35 AM To: 'emc-p...@majordomo.ieee.org' Subject: TEMPEST regulations Dear colleagues, I am looking to procure an UK (or NATO) TEMPEST standard/regulation -- JSP 480. Any help in finding a source for this doc will be greatly appreciated. Whether some confidentiality restrictions exist, they can be resolved by our library, as it has similar docs. Thanks, Guidea Alexandru CAE Inc. Montreal, CANADA Alexandru: A JSP is a British Ministry of Defence (MoD) Joint Services Publication. You might try the MoD homepage at: http://www.dstan.mod.uk/index.html but many Comsec documents are classified, so you might have trouble getting a copy (as in not exactly a pdf on the web g). 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: ESD gun verification
Most spectrum analyzers don't do very well with a single event. The repetitive waveform needs to be there to be operated upon. - Robert - Robert A. Macy, PEm...@california.com 408 286 3985 fx 408 297 9121 AJM International Electronics Consultants 101 E San Fernando, Suite 402 San Jose, CA 95112 On Fri, 9 May 2003 08:28:11 -0400 Chris Maxwell chris.maxw...@nettest.com wrote: One question that struck me is: Why isn't a spectrum analyzer used to verify the waveform? Most labs don't have a 4Ghz oscilloscope; but they almost all have a 10Ghz spectrum analyzer. It seems that the spectrum of the waveform should be just as traceable and repeatable as the waveform itself. From my own experience, I use this method to quickly verify our EFT generator in our own lab (although I'm just a manufacturer, not a third party lab). We have the EFT generator calibrated yearly; and whenever I use it, I turn on the spectrum analyzer and read the spectrum just to make sure that it's working. Chris Maxwell | Design Engineer - Optical Division email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024 NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA web www.nettest.com | tel +1 315 797 4449 | 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
TEMPEST regulations
Dear colleagues, I am looking to procure an UK (or NATO) TEMPEST standard/regulation -- JSP 480. Any help in finding a source for this doc will be greatly appreciated. Whether some confidentiality restrictions exist, they can be resolved by our library, as it has similar docs. Thanks, Guidea Alexandru CAE Inc. Montreal, CANADA 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: Heat Sink Colour.
To efficiently radiate heat, the radiator needs to appear black at the wavelength of the radiation. For electronic devices, the wavelength of radiation is well into the infrared region. It turns out that almost any organic coating will work well. Paints are organic coatings. The color of the paint really doesn't make much difference, though you do want to avoid metalic paints. Don Borowski Schweitzer Engineering Labs Pullman, Washington hansm hans.mellb...@baclcorp.com@majordomo.ieee.org on 05/08/2003 07:31:24 PM Please respond to hansm hans.mellb...@baclcorp.com Sent by:owner-emc-p...@majordomo.ieee.org To:LEUNG YAT WAH DEREK ywle...@vtc.edu.hk, EMC- PSTC emc-p...@majordomo.ieee.org cc: Subject:Re: Heat Sink Colour. Only in static or radiant mode. Otherwise surface finish has more effect in forced or convection mode. But, in any event, black seems to be the the most radiant in black body radiation mode. There are more details than than but this is just a thumbnail synopsis. Hans Mellberg Engineering Manager BACL 230 Commercial Street Sunnyvale CA 94085 USA 408-732-9162 x38 408-732-9164 fax From: LEUNG YAT WAH DEREK ywle...@vtc.edu.hk To: EMC- PSTC emc-p...@majordomo.ieee.org Sent: Thursday, May 08, 2003 6:50 PM Subject: 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 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
Alexandru, The short answer is no, the circuit would not provide the equivalent of reinforced insulation. However, have a look at 2.2.4 (60950-2000)- Connection of SELV circuits to other circuits. You can connect SELV circuits to other circuits provided, that under single fault conditions (i.e. the transzorb, or fuse shorted out) you do not exceed the SELV limits, and you have a minimum of basic insulation between SELV circuits and the primary circuit (including the neutral). Regards Doug Alexandru Guidea gui...@cae.com To: 'emc-p...@majordomo.ieee.org' emc-p...@majordomo.ieee.org Sent by: cc: owner-emc-pstc@majordom Subject: reinforced insulation - EN60950 o.ieee.org 05/06/03 12:46 PM Please respond to Alexandru Guidea 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
Re: NEW EMC DIRECTIVE
I read in !emc-pstc that Gordon,Ian ian.gor...@bocedwards.com wrote (in E1BA0362B28ED211A1E80008C71EA3060206FBEA@EXC_EAS01) about 'NEW EMC DIRECTIVE' on Fri, 9 May 2003: How can the authors of the directive reconcile the concept of benign equipment (which are outside the scope of the directive) with the requirement to include, for example, a mains lead? Does this mean that if leads are sold separately they must have a D of C? It appears so. I suppose the standards one would cite for EMC and safety are those which apply to the products the cable is intended to be used with. For general-purpose mains leads, I suppose one would cite the Generics for EMC, and they would pass by default. I assume that a lead provided with a piece of equipment would be covered by the D of C for that equipment. I think the DOC had better say 'the Model XYZ, including the cables supplied with it'. -- 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: Field trial requirements
I read in !emc-pstc that Jon Jones jon.jo...@atltelecom.com wrote (in D1D4A262894FD511A65900902707BB246122B5@CARDIFF-NT-MAIL) about 'Field trial requirements' on Fri, 9 May 2003: Are there any EU legal requirements regarding the supply of products for field trials that have not yet completed the CE process. Is it legal to do so provided the products are labelled accordingly, (Evaluation sample etc), installed in restricted locations and are still the property of the manufacturer (thus in effect not being made available as defined in the new / global approach) If the products are not 'placed on the market', they are not 'in free circulation'. But there may well be difficulties in shipping them across national borders in Europe. The approach of the regulatory authorities differs from country to country. If you designate each item as being for use at a named site only, you may be able to use the provisions for 'one-offs' in the new Directive. But this is a matter which has already been raised as an objection to the current draft, AIUI. -- 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: ESD gun verification
Dear Chris, Why not a Spectrum Analyzer? For none-traceble verification it is a very good tool. For tracable measurements there are the following problems: - The amplitude uncertainty is about +/- 1.5 dB =about 15 % - The pulse is repeated let's say 20 times a second, but the pulse is only 100 ns wide. So the requirements for the linearity of the mixer is very high. David Pommerenke From: Chris Maxwell [mailto:chris.maxw...@nettest.com] Sent: Friday, May 09, 2003 7:28 AM To: Pommerenke, David; John Woodgate; emc-p...@majordomo.ieee.org Subject: RE: ESD gun verification One question that struck me is: Why isn't a spectrum analyzer used to verify the waveform? Most labs don't have a 4Ghz oscilloscope; but they almost all have a 10Ghz spectrum analyzer. It seems that the spectrum of the waveform should be just as traceable and repeatable as the waveform itself. From my own experience, I use this method to quickly verify our EFT generator in our own lab (although I'm just a manufacturer, not a third party lab). We have the EFT generator calibrated yearly; and whenever I use it, I turn on the spectrum analyzer and read the spectrum just to make sure that it's working. Chris Maxwell | Design Engineer - Optical Division email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024 NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA web www.nettest.com | tel +1 315 797 4449 | -Original Message- From: Pommerenke, David [SMTP:davi...@umr.edu] Sent: Thursday, May 08, 2003 5:46 PM To: John Woodgate; emc-p...@majordomo.ieee.org Subject: 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 -Original Message- 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 This message is from the IEEE EMC Society Product Safety
RE: ESD gun verification
One question that struck me is: Why isn't a spectrum analyzer used to verify the waveform? Most labs don't have a 4Ghz oscilloscope; but they almost all have a 10Ghz spectrum analyzer. It seems that the spectrum of the waveform should be just as traceable and repeatable as the waveform itself. From my own experience, I use this method to quickly verify our EFT generator in our own lab (although I'm just a manufacturer, not a third party lab). We have the EFT generator calibrated yearly; and whenever I use it, I turn on the spectrum analyzer and read the spectrum just to make sure that it's working. Chris Maxwell | Design Engineer - Optical Division email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024 NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA web www.nettest.com | tel +1 315 797 4449 | -Original Message- From: Pommerenke, David [SMTP:davi...@umr.edu] Sent: Thursday, May 08, 2003 5:46 PM To: John Woodgate; emc-p...@majordomo.ieee.org Subject: 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 -Original Message- 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 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
RE: Design of low cost ESD gun.
Since you can buy a compliant gun for a few thousand dollars (used, demos, etc), why would you want to spend at least that much in time and materials to get something close?? Mike Hopkins Thermo Electron michael.hopk...@thermo.com From: LEUNG YAT WAH DEREK [mailto:ywle...@vtc.edu.hk] Sent: Thursday, May 08, 2003 9:50 PM To: emc-p...@majordomo.ieee.org Subject: 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 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: Radius High Speed Lines
The article at: http://www.ultracad.com/90deg.pdf deals with your question. Although he specifically deals with 90 degree corners, 45 degree are addressed too. Fred Townsend 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
John et al How can the authors of the directive reconcile the concept of benign equipment (which are outside the scope of the directive) with the requirement to include, for example, a mains lead? Does this mean that if leads are sold separately they must have a D of C? I assume that a lead provided with a piece of equipment would be covered by the D of C for that equipment. Ian Gordon -Original Message- From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: 08 May 2003 17:50 To: emc-p...@majordomo.ieee.org Subject: 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 _ 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
Field trial requirements
Group, Are there any EU legal requirements regarding the supply of products for field trials that have not yet completed the CE process. Is it legal to do so provided the products are labelled accordingly, (Evaluation sample etc), installed in restricted locations and are still the property of the manufacturer (thus in effect not being made available as defined in the new / global approach) many thanks. Jon Jones Principal Approvals Engineer _ This message has been checked for all known viruses by Star Internet delivered through the MessageLabs Virus Control Centre. __ Disclaimer of Liability ATL Telecom Ltd shall not be held liable for any improper or incorrect use of the information described and/or contained herein and assumes no responsibility for anyones use of the information. In no event shall ATL Telecom Ltd be liable for any direct, indirect, incidental, special, exemplary, or consequential damages (including, but not limited to, procurement or substitute goods or services; loss of use, data, or profits; or business interruption) however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence or otherwise) arising in any way out of the use of this system, even if advised of the possibility of such damage. 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: CISPR 16-4 + VERIFICATION OF TEST EQUIPMENT
Luke et al Are you trying to satisfy the relevant clauses of ISO 17025 General requirements for the competence of testing and calibration laboratories ? I have been following the guidance in UKAS document LAB 34 http://www.ukas.com/pdfs/Lab34.pdf for calculating uncertainties in EMC measurements. This is based on the older NIS 81 document and references the CISPR standard you refer to. Am I correct in saying that as long as you do a valid assessment of uncertainties, by following whatever standard, you can satisfy the relevant requirements of ISO 17025? On the issue of verification of ESD test equipment, referred to in other postings, but relevant to ISO 17025 compliance, is it not sufficient to merely observe that a spark is generated by a calibrated ESD gun when the device is operational and brought close to a conductive surface? Do you really need to observe the waveform? If this is not sufficient then shouldn't the same rationale be applied to all other pieces of immunity test equipment? Ian Gordon -Original Message- From: Luke Turnbull [mailto:luke.turnb...@trw.com] Sent: 06 May 2003 15:02 To: emc-p...@ieee.org Subject: 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 _ 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
Re: Heat Sink Colour.
Very simply, dark colors pass radiated energy. Light colors reflect radiated energy. The human body radiates very little energy but the sun contains huge amounts of radiated energy. Therefore white clothes are cooler because they reflect the sun's energy. Fred Townsend LEUNG YAT WAH DEREK wrote: 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 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
Hello Kevin, What information are you looking for? Nominal Voltages and Frequency or certification requirements? From the country list you provide, only two of them require approval of power cords: Argentina and most recently Brazil. I suggest that you contact Feller on this because they are the only power cord manufacturer that I know of who is on top of South American power cord requirements. However, if you are interested in voltages and frequencies you can look at the following web site: http://kropla.com/electric.htm Not all countries are covered by this web site, but it is the most comprehensive source available, for free, on the internet. Use at your own risk. Best regards, Ron Wellman At 02:03 PM 5/8/2003 -0700, Kevin Tseng wrote: 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/ 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: Heat Sink Colour.
Only in static or radiant mode. Otherwise surface finish has more effect in forced or convection mode. But, in any event, black seems to be the the most radiant in black body radiation mode. There are more details than than but this is just a thumbnail synopsis. Hans Mellberg Engineering Manager BACL 230 Commercial Street Sunnyvale CA 94085 USA 408-732-9162 x38 408-732-9164 fax - Original Message - From: LEUNG YAT WAH DEREK ywle...@vtc.edu.hk To: EMC- PSTC emc-p...@majordomo.ieee.org Sent: Thursday, May 08, 2003 6:50 PM Subject: 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
