RE: Looking for test house to perform surge testing
Hi Keith, Try Mikes Product Service (part of TUV Product Service) Ohmstrasse 2-4 P.O.Box 28 D-94340 Strasskirchen Germany Phone +49 9424 9407 0 Fax +49 9424 9407 60 It's an excellent test house! They do the works within EMC testing. Best regards Korn _ Give a nice day!Gi en god dag! Einar Korn Heide Aas Regulatory Affairs Vingmed Sound A/S P.O. Box 141, N-3181 Horten, Norway Phone: +47 3304 2132 Fax: +47 3304 2491 Home: +47 3304 7352 / +47 9321 5629 VHF: Norway - LA 9563 _ -Original Message- From: Keith Goshia [SMTP:kgos...@qualcomm.com] Sent: Wednesday, February 25, 1998 16:12 To: emc-pstc Subject:Looking for test house to perform surge testing I am looking for a testing house to perform surge testing to meet IEEE Recommended Practice on Surge Voltage in Low Voltage AC Power Circuits, IEEE C62.41 - 1991 to Category C2 10kV 5kA with an 1.2/50 - 8/20 combination waveform === Keith A. Goshia Phone: (303) 247-5025 Senior Regulatory Engineer Cell: (303) 507-0158 D-1021 Fax:(303) 247-5115 Qualcomm Inc. Pager: (800) 401-3175 5450 Western Ave. Lab:(303) 247-5107 Boulder CO, 80301 E-mail: kgos...@qualcomm.com === How does Teflon stick to the pan?
Re: FCC Questions.
RE: FCC Questions.
One additional point about the FCC accepting CISPR data. The CISPR 22 measurements should be tested with ANSI 63 test set-ups for the EUT (Equipment Under Test). -Original Message- From: ron_pick...@hypercom.com [SMTP:ron_pick...@hypercom.com] Sent: Friday, February 20, 1998 2:37 PM To: j...@cirris.com; emc-p...@ieee.org Subject:Re: FCC Questions. Jon, According to FCC Part 15 Subpart B clause 103, an unintentional radiator such as the one you've described can be exempted from the requirements of compliance if (f)the device's power consumption is less than 6nW, and (h)the highest frequency generated and/or used in the device is less than 1.705MHz and if the device does not operate from the AC power lines. Only if this device of yours meets all of these conditions, then FCC Part 15 compliance is not required. As the intended environment is residential, then the Class B requirements must be met. CISPR 22 can be used in lieu of FCC Part 15 for testing requirements. Please note that compliance to FCC Part 15 involves both radiated and conducted emissions. As the FCC has now allowed self declaration for Class B devices (similar to the CE scheme in Europe), testing and supporting test reports are still necessary to validate the self declaration. In allowing this declaration scheme, the FCC has freed up some of its resources to engage in enforcement activities. It is likely that a complaint would have to occur before it reached the FCC's attention, however, there are other methods of enforcement. If it was discovered that your device did not bear any marking and found not comply with the requirements, you will likely be forced to fix the problem, upgrade units already sold and on the shelves and likely face some legal/financial wranglings with the US government (not a pleasant prospect), not to mention the blemish to your commercial reputation which will likely occur in such a case. Of course, the decision of compliance or non-compliance is yours and the risks associated therein. Bear in mind that using a one-of-a-kind product in your own home is one thing, but offering the device for sale to others is quite another in terms of commercial and legal responsibility. I hope this helps. Is there anything anyone would like to add. The above constitutes only my opinion(s). Best regards, Ron Pickard rpick...@hypercom.com __ Reply Separator _ Subject: FCC Questions. Author: Jon Bertrand j...@cirris.com at INTERNET List-Post: emc-pstc@listserv.ieee.org Date:2/20/98 9:13 AM Hello Everyone, A lot of budding midnight designers ask these questions on the microcontroller newsgroups so I thought I'd ask them here - and learn something :) (If I've missed some FAQ that covers this please let me know.) 1) Say I'm building some microcontroller based widget in my home business that runs model trains (or whatever). It's not an intential transmitter, its typically used in the home. And I want to sell them. Do I need some FCC approval. Specifically do I need to: 1.a) Spend money having someone test emissions. 1.b) File some paperwork with the FCC. 2) If I don't have the money for testing - but I really do know how to keep my microcontroller quiet (i.e I know loop area, di/dt, and maybe even have done lots of other 'approved' products) - and a little in-home testing shows it doesn't bother the rabbit ears or show-up on the AM or FM radio. Would I be in violation of some law if I just sold the darn thing. 2.a) Would I be in violation if it really was quiet to CISPR (i.e. would have passed). (i.e. is there now a CE mark like compliance that lets me self declare and assert who's responsible). 3) How does the FCC verify that I don't pollute the EM band - do they random sample train widgets or wait for someone to complain. Thanks, Jon Bertrand j...@cirris.com
RE: Metric Directive in Japan??
I've run across a similar problem: We provide an H Field monitor made by Walker Scientific that reads in Gauss and our Japanese rep (Toyo) told me a couple of weeks ago that he could no longer accept delivery on meters unless we change the scale to read in Tesla... His argument was a Japanese regulation which makes it illegal for HIM to resell the product to his customer. That's all I know Mike Hopkins mhopk...@keytek.com -- From: Mike Morrow[SMTP:mmor...@compuserve.com] Reply To: mmor...@compuserve.com Sent: Monday, February 23, 1998 4:33 PM To: IEEE EMC Board Subject: Metric Directive in Japan?? I have a rep in Japan who is claiming that as of 1/1/99 our pressure transducer products can ONLY have SI units marked on them due to some Japanese Regulation. Anyone know anything about this? He has not been able to produce the regulation so I am extremely skeptical. Thanks Mike Morrow Product Standards Engineer Data Instruments mike_mor...@datainstruments.com mmor...@compuserve.com Phone 978-264-9550 xt-201 Fax 978-263-0630
RE: EN50092-1:1997
What is the point? - Mel -- From: CTL[SMTP:c...@prodigy.net] Sent: Monday, February 23, 1998 12:22 PM To: emc-p...@ieee.org Subject:EN50092-1:1997
Delta transformer grounding (was: RE: GFCI in IT (three phase) Ne tworks)
Doug - Delta-delta transformers are popular with the utilities for economy's sake (they are less expensive than WYE transformers) For similar reasons, some industrial applications distribute and use power within their plants on delta feeds. In office environments, however, it's typical to use a WYE connected secondary, i.e., 120Y/208V, for general appliance use and other WYE connected configurations for lighting and other power. When a delta transformer is grounded, it typically occurs at either a corner, where two secondaries are electrically connected, or center-grounded at the center of one of the secondaries. It is my understanding that the latter case is typical for power provided to homes in the US and is also referred to as split-phase. Regards, Peter L. Tarver Nortel ptar...@nt.com -- From: Doug McKean[SMTP:dmck...@paragon-networks.com] Sent: Tuesday, February 24, 1998 11:11 AM As a result of this very interesting discussion, I have to ask this embarrassingly simple questions. If delta configurations are the most common in the US (I'm assuming this) for polyphase systems, where does ground get connected? If the delta is basically NOT referenced to ground, how then do GFCIs operate? Are the transformers of a delta centertapped for 120vac? Sorry for these simple questions, I'm not a power guy. Only school info from long ago. Regards, Doug
Re: conductive coatings
Yes Eric, I have worked with conductive coatings on plastic with no problems as long as some things are kept in mind - There's a whole UL thing to it that I can list if enough people want me to. The coatings cannot withstand repeated removal from the product. The coatings are very fragile. Follow the basic rule of - install the cover only when you know it's not going to be removed. I looked into nickel, copper, and silver. It seemed that nickel was half as conductive as copper and silver was more than twice conductive as copper. Price seemed to follow suit also. Shielding effectiveness totally dependent upon how well your vendor can control the thickness. Stay below 1 ohms/sq. I forget how many mils that works out to be for nickel. 7 mils maybe? Observe the type of emulsion used for the specific metal used. Nickel conductive coating is not nickel conductive coating. There are at least two out there I found - one's basically a water based paint, the other is a sort of oil based paint. The oil base is obviously less conductive and that translates to a thicker coating needed to be applied and that translates to more paint - more cost. Don't use it for primary ground obviously. I also looked into conductive plastic coatings. At the bottom of it all, conductive plastic was twice as expensive as plastic with conductive coating. Regards, Doug -- From: Eric Henning henn...@fp.com To: emc-p...@ieee.org Subject: conductive coatings Date: Tuesday, February 24, 1998 3:53 PM anybody have any opinions on conductive coatings on plastic for rfi/emi protection? we've been very successful at designing our products to be quiet and immune even in plastic boxes but i've been asked to look into conductive coatings for further protection. i've ordered some spray/brush on coatings but is it a waste of time? I was hoping to find spray can samples but haven't, anybody know of spray bomb coatings? also looking into vacuum application. I guess i'd like to try spray/brush stuff first just to see if it makes any difference. thanks eric henn...@fp.com
dow and dop
Pryor This extract from the EMC+LVD Yearbook 98 Standards section, which will be published early March may help you. More info from web site below Certification Clauses The European Commission has declared the certification clauses in ENs to be illegal. These clauses were used to extend the transition period, in some cases beyond the 'dow' of the previous edition. Any 'dow' longer than three years from 'dop' now requires agreement by the Commission. Proposals for new 'docs' are shown in the Remarks Column since none of these dates had been published in OJEC at the time of going to press. Please note that 'docs' were formerly known as 'dows'. Where national standards are mentioned in the remarks column the information derives from the certification clause and the latest information on the 'doc' should be sought. These dates will be published in the OJEC when a standard is listed. Best regards Alan E Hutley Nutwood UK Ltd Editor and Publisher UK EMC Journal http://www,-emc-journal.co.uk
Looking for test house to perform surge testing
I am looking for a testing house to perform surge testing to meet IEEE Recommended Practice on Surge Voltage in Low Voltage AC Power Circuits, IEEE C62.41 - 1991 to Category C2 10kV 5kA with an 1.2/50 - 8/20 combination waveform === Keith A. Goshia Phone: (303) 247-5025 Senior Regulatory Engineer Cell: (303) 507-0158 D-1021 Fax:(303) 247-5115 Qualcomm Inc. Pager: (800) 401-3175 5450 Western Ave. Lab:(303) 247-5107 Boulder CO, 80301 E-mail: kgos...@qualcomm.com === How does Teflon stick to the pan?
Bellcore Fire Resistance
How do you verify that material, component, wiring, and cables used in component power supply meet Bellcore NEBS TR-NWT-63 requirement for Fire Resistance in section 4.3.3. Is there any similarity between UL flammability and Bellcore fire resistance? Parviz Boozarpour, P. E. Electronic Engineering Services ee...@pacbell.net
Re: Looking for test house to perform surge testing
Keith, Don't know of any test houses that have a Surge generator with 2 Ohms of source impedance. Haefely-Trench make one, called the PSURGE 30.1. Their phone # is (703) 494-1900. Ask for Leo Makowski. When I bought one for Fluke, it was about $90k. It will generate surges up to 30 kV and stores about 4000 J of energy in the 9 uF capacitor. Good luck, Dan Teninty P.E. Senior Engineering Specialist Systems Safety Raytheon Missile Systems Tucson, AZ __ Reply Separator _ Subject: Looking for test house to perform surge testing Author: kgos...@qualcomm.com at mime List-Post: emc-pstc@listserv.ieee.org Date:2/25/98 7:11 AM I am looking for a testing house to perform surge testing to meet IEEE Recommended Practice on Surge Voltage in Low Voltage AC Power Circuits, IEEE C62.41 - 1991 to Category C2 10kV 5kA with an 1.2/50 - 8/20 combination waveform === Keith A. Goshia Phone: (303) 247-5025 Senior Regulatory Engineer Cell: (303) 507-0158 D-1021 Fax:(303) 247-5115 Qualcomm Inc. Pager: (800) 401-3175 5450 Western Ave. Lab:(303) 247-5107 Boulder CO, 80301 E-mail: kgos...@qualcomm.com === How does Teflon stick to the pan? RFC-822-headers: Received: from CONVERSION-DAEMON by mail.hac.com (PMDF V5.1-10 #26245) id 0eoy00f018m...@mail.hac.com for daniel e teninty@mime.mail.hac.com; Wed, 25 Feb 1998 11:25:39 -0800 (PST) Received: from PROCESS-DAEMON by mail.hac.com (PMDF V5.1-10 #26245) id 0eoy00f018m...@mail.hac.com for daniel e teninty@mime.mail.hac.com; Wed, 25 Feb 1998 11:25:26 -0800 (PST) Received: from fw-es05.hac.com by mail.hac.com (PMDF V5.1-10 #26245) with ESMTP id 0eoy004fr8l...@mail.hac.com for daniel e teninty@mime.mail.hac.com; Wed, 25 Feb 1998 11:24:36 -0800 (PST) Received: from ruebert.ieee.org ([199.172.136.3]) by fw-es05.hac.com (8.8.4/8.8.4) with ESMTP id LAA13751 for deteni...@mail.hac.com; Wed, 25 Feb 1998 11:26:30 -0800 (PST) Received: (from daemon@localhost) by ruebert.ieee.org (8.8.8/8.8.8) id KAA15288 for emc-pstc-list; Wed, 25 Feb 1998 10:13:18 -0500 (EST) List-Post: emc-pstc@listserv.ieee.org Date: Wed, 25 Feb 1998 08:11:52 -0700 From: Keith Goshia kgos...@qualcomm.com Subject: Looking for test house to perform surge testing Sender: owner-emc-p...@majordomo.ieee.org X-Sender: kgos...@redcloud.qualcomm.com X-Resent-to: Multiple Recipients emc-p...@majordomo.ieee.org Reply-to: Keith Goshia kgos...@qualcomm.com Message-id: 3.0.32.19980225081151.00762...@redcloud.qualcomm.com MIME-version: 1.0 X-Mailer: Windows Eudora Pro Version 3.0 (32) Precedence: bulk X-Info: Help requests to emc-pstc-requ...@majordomo.ieee.org X-Info: [Un]Subscribe requests to majord...@majordomo.ieee.org X-Moderator-Address: emc-pstc-appro...@majordomo.ieee.org X-Listname: emc-pstc X-Priority: 1 (Highest)
RE: Bellcore Fire Resistance
Hello Parviz: One way to verify that your supplier is in compliance to the Bellcore specifications is to ask for a Certificate of Conformance (C of C), stating compliance to these requirements. The more specific you are the better. As suppliers of magnetics to the telecommunications industry, many of our customers request this. We often need to supply them with the mass of flammable polymeric mass, and indicate all of the components (in our case tapes, plastics, etc.), quantities, and whether or not they are individually in compliance. The Similarity between the Bellcore and UL requirements is that Bellcore relies in part on the UL ratings. For example, (clause 4.2.3 of GR-63-CORE), tapes must be UL 510 flame retardant, foamed polymers must be UL 94 HF1 or better, plastics must be UL 94V-1 or better, etc. They must also have an LOI (Oxygen Index) of 28% or greater as determined by ASTM D 2863-77. For information technology equipment, UL 1950 generally requires a UL 94V-2 rating (not as stringent as Bellcore). For cables and other things, other UL, IEEE, IEC, ANSI, CSA, etc. standards may be called out. For electronic components, rather than verifying the flame retardency of the materials, the component needle flame test may be performed. You will still need to verify that they are building the components with the same materials that you had it tested with. Hope this helps, Mel PedersenMidcom, Inc. Homologations Engineer Phone: (605) 882-8535 mpeder...@midcom.anza.com Fax: (605) 886-6752 -- From: Parviz Boozarpour[SMTP:ee...@pacbell.net] Sent: Wednesday, February 25, 1998 12:48 PM To: emc-p...@ieee.org Subject:Bellcore Fire Resistance How do you verify that material, component, wiring, and cables used in component power supply meet Bellcore NEBS TR-NWT-63 requirement for Fire Resistance in section 4.3.3. Is there any similarity between UL flammability and Bellcore fire resistance? Parviz Boozarpour, P. E. Electronic Engineering Services ee...@pacbell.net
Re: conductive coatings
Eric, I'll chip in my two cents here, having had some experiences with conductive coatings. I've seen emission problems from products with both nickel coatings and copper. Problems have been due to incomplete coverage, failure to fill details, and unauthorized vendor mechanical changes. You can build testers for quick estimates how effective a coating is. My favorite is two, one-turn, shielded loops with adjustable spacing. While magnetic coupling is perhaps an unfair test for chassis shielding, I feel it gives a good handle on how well a coating will prevent nearby current-carrying conductors from generating external fields. (I've been able to follow a computer's clock lines through the bottom of a chassis by using a small -- 2mm -- loop; a result which rather startled the people who saw it done.) I generally calibrate a two-loop probe at a standard distance, say, an inch or two cm, setting air as zero, and galvanized iron as perfect. Because the coupling is rather localized, this will usually find small defects in coverage which multiple resistance tests might miss. The failures have mostly been related to quality of the coating, not necessarily its material, however,some materials require different techniques. Nickel has a relatively high resistivity and must be quite thick for good shielding. Copper can be MUCH thinner, but is, as a result, more prone to failure to fill in chassis details than nickel, where multiple passes are more likely to cover everything. I had to press a vendor to run three or four sprayer passes for a copper coating which replaced a nickel one, and it took a good deal of cajoling to make it happen. However, once this was done, performance was better even that a nickel one meeting emission requirements in use. You will need to coordinate among mechanical, electrical and QC departments when using coatings. Too may details in the casting will result in a hard-to-cover enclosure, and you will need to know here the electrical design expects ground pits so these areas can be treated with special care. All these are possible,but (as with most other things in our business) they are most often done in isolation, which makes our job more difficult! == Original Message Follows Date: 24-Feb-98 13:08:27 MsgID: 1058-10464 ToID: 72146,373 From: Eric Henning INTERNET:henn...@fp.com Subj: conductive coatings Chrg: $0.00 Imp: Norm Sens: StdReceipt: NoParts: 1 anybody have any opinions on conductive coatings on plastic for rfi/emi protection? we've been very successful at designing our products to be quiet and immune even in plastic boxes but i've been asked to look into conductive coatings for further protection. i've ordered some spray/brush on coatings but is it a waste of time? I was hoping to find spray can samples but haven't, anybody know of spray bomb coatings? also looking into vacuum application. I guess i'd like to try spray/brush stuff first just to see if it makes any difference. thanks eric henn...@fp.com == End of Original Message =
RE: Delta transformer grounding (was: RE: GFCI in IT (three phase) Ne tworks)
George - The answer to your question is: yes. However, in the US, this is type of system is used to deliver power to homes and there are either no or very few homes supplied with three-phase power. Such a system would be abhorrent to any user of all three phases, who would prefer the corner-grounding method. Perhaps this thread has become a bit muddled in that I was responding to a question Doug McKean posed about grounding of delta secondaries. There are two basic methods, as I described. I was not trying to address the GFCI question or otherwise say that the center-grounded-delta configuration was suitable for other than power delivery to homes, receiving 120V line-to-neutral and 240V line-to-line. My apologies for the confusion. Regards, Peter L. Tarver Nortel ptar...@nt.com -- From: Georg M. Dancau[SMTP:dan...@compuserve.com] Sent: Thursday, February 26, 1998 3:47 AM Peter Tarver wrote: Delta-delta transformers are popular with the utilities for economy's sake (they are less expensive than WYE transformers) For similar reasons, some industrial applications distribute and use power within their plants on delta feeds. In office environments, however, it's typical to use a WYE connected secondary, i.e., 120Y/208V, for general appliance use and other WYE connected configurations for lighting and other power. When a delta transformer is grounded, it typically occurs at either a corner, where two secondaries are electrically connected, or center-grounded at the center of one of the secondaries. It is my understanding that the latter case is typical for power provided to homes in the US and is also referred to as split-phase. Regards, Peter L. Tarver Nortel ptar...@nt.com Hi Pete I want to address the issue of or center-grounded at the center of one of the secondaries. Do you mean like this ? [Image] I never encountered this yet. In this case, the voltages of the three active conductors with respect to earth would be: V(L1)=480V*sqrt(3)/2=415V V(L2)=480V/2=240V V(L3)=480V/2=240V The voltage of the imaginary center point would be about 208V. You would have enormous leakage currents through the Y capacitors in the power line filters. On the other hand, as far as I remember, the IEC 38 states, that for a TN network, one active conductor is earthed (not stating which one). In this case I do not see any conformance with the IEC38. I'll be glad for any comment from the pstc community on this issue. Best regards George -- ** * Dr. Georg M. Dancau * HAUNI MASCHINENBAU AG * * g.m.dan...@ieee.org * Manager EMC Lab * * TEL: +49 40 7250 2102 * Kampchaussee 8..32 * * FAX: +49 40 7250 3801 * 21027 Hamburg, Germany * ** * home: Tel: +49 4122 99451 * Hauptstr. 60a * * Fax: +49 4122 99454 * 25492 Heist, Germany* **
RE: RUSSIA
Russian certification is done through GOSSTANDART. The GOST certificate is based on testing which is similar to the rest of the world (e.g. IEC 950, CISPR22, etc.). CE marking does not however satisfy the requirements. There are a few companies that can offer the GOST certificate. One of them is Intertek Testing Services. ITS has several engineers who have spent time in Russia training for the process. The specific list of standards, as you might imagine, gets pretty lengthy. You may contact me directly for more information. Bob Martin, PE, NCE Sr. Technical Manager - NEBU Intertek Testing Services r...@itsqs.com -- From: Paul Smith To: emc-p...@ieee.org Subject: RUSSIA List-Post: emc-pstc@listserv.ieee.org Date: Friday, February 27, 1998 3:35AM To: the whole group, Does anybody have any information regarding EMC and safety requirements in Russia. I know that in the past equipment could only be imported with a certificate of conformity prepared by SGS, and that the general EMC requirement was CISPR based (I think!) as to safety I'm not aware of their requirement. However I have heard that this is to be 'phased' out and that the EN guidelines will be used for both EMC and product safety. I really need to know when this will happen or if it has happened and what their requirements will eventually be (specification numbers et al) Thanks very much Paul Smith
abstract: emc susceptibility of slotted screens article
PSNet Susceptibility Analysis of Arbitrarily Shaped 2-D Slotted Screens Using a Hybrid Generalized Scattering Matrix Finite-element Technique by J V B Tejedor, L Nuno M F Battaller , Spanish authors in IEEE Transactions on Electromagnetic Compatibility, Vol 40, No 1, February 1998 Abstract: The electromagnetic susceptibility (EMS) inside slotted screens has been studied using a hybrid technique. The screen is characterized by a generalized admittance or impedance matrix, computed using the finite element method (FEM), which is then combined with a modal solution in free-space. The scattering matrix for the screen can then be easily computed. As a practical application, the electrical performance of slotted square envelope has been studied. IN general, it is shown that coupling to the interior of slotted screens is maximized at frequencies corresponding to resonances of the shorted scree, provided that the fields do not vanish near the aperture. Index Terms:Electromagnetic coupling, finite-element methods, scattering matrices, shielding. - - - - - Peter E Perkins Principal Product Safety Consultant Tigard, ORe 97281-3427 +1/503/452-1201 phone/fax p.perk...@ieee.org email visit our website: http://ourworld.compuserve.com/homepages/peperkins - - - - -
Partial Discharge Test
Dear Group, Is there any in the group that is familiar with the Partial Discharge Test? Have started to read IEC 664 Insulation coordination for equipment within low-voltage systems, but find some details lacking. Thanks Sincerely, Frank Goto A-pex International
[1]RUSSIA
[1]RUSSIA2/27/98 Hi, I am on Jury Duty call for the work week starting Monday, 3/2 and ending 3/6. For urgent issues, please contact Tim Stover. Otherwise, I will respond to your e-mail as my schedule permits. Regards, Tony Fredriksson Manager Agency Compliance -- List-Post: emc-pstc@listserv.ieee.org Date: 2/27/98 4:01 AM To: Tony Fredriksson From: Paul Smith To: the whole group, Does anybody have any information regarding EMC and safety requirements in Russia. I know that in the past equipment could only be imported with a certificate of conformity prepared by SGS, and that the general EMC requirement was CISPR based (I think!) as to safety I'm not aware of their requirement. However I have heard that this is to be 'phased' out and that the EN guidelines will be used for both EMC and product safety. I really need to know when this will happen or if it has happened and what their requirements will eventually be (specification numbers et al) Thanks very much Paul Smith -- RFC822 Header Follows -- Received: by mac.net.com with ADMIN;27 Feb 1998 03:56:55 -0800 Received: from ns1.net.com by unet.net.com (SMI-8.6/SMI-SVR4) id DAA26340; Fri, 27 Feb 1998 03:48:45 -0800 Received: from ruebert.ieee.org (ruebert.ieee.org [199.172.136.3]) by ns1.net.com (8.8.6/8.6.9) with ESMTP id DAA18535; Fri, 27 Feb 1998 03:54:20 -0800 (PST) Received: (from daemon@localhost) by ruebert.ieee.org (8.8.8/8.8.8) id EAA03008 for emc-pstc-list; Fri, 27 Feb 1998 04:12:02 -0500 (EST) Comments: Authenticated sender is smithp@kirkcaldy1 From: Paul Smith smi...@stranduk.com To: emc-p...@ieee.org List-Post: emc-pstc@listserv.ieee.org Date: Fri, 27 Feb 1998 08:35:20 + MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Subject: RUSSIA Priority: normal X-mailer: Pegasus Mail for Windows (v2.31) Message-ID: 888570151.10285...@stranduk.demon.co.uk Sender: owner-emc-p...@majordomo.ieee.org Precedence: bulk Reply-To: Paul Smith smi...@stranduk.com X-Resent-To: Multiple Recipients emc-p...@majordomo.ieee.org X-Listname: emc-pstc X-Info: Help requests to emc-pstc-requ...@majordomo.ieee.org X-Info: [Un]Subscribe requests to majord...@majordomo.ieee.org X-Moderator-Address: emc-pstc-appro...@majordomo.ieee.org
IEEE Activity in Local Chapter: Course Offering at Reduced Cost
To encourage activity in IEEE local chapters I have decided to make an offering of my courses at reduced cost to those who are active or will become active soon. Please pass this information to all. Richard Haynes is offering two courses at the NMi USA Inc in Tinton Falls(near Freehold), NJ as follows: 1) A 3 hr. Overview Course entitled, Executive Summary: EMC/EMI/ESD Related to Corrosion and Materials Reliability Issues, on March 10 and again on May 26. 2) A 1 day in depth course entitled, EMC/EMI/ESD Related to Corrosion and Materials Reliability Issues, on March 12 and again on May 28 We are offering a 50% discount for IEEE members that are active in their local chapter. Any questions call: Thomas P. Tortoriello 732-842-8900, nmius...@aol.com Richard Haynes 609-497-4584, rhay...@usa.net
[Fwd: Message from Internet]
Hi folks, something seems not to be OK with the list server. I got twice this message. What does it mean? Anybody else got similar messages ? Greetings George -- ** * Dr. Georg M. Dancau * HAUNI MASCHINENBAU AG * * g.m.dan...@ieee.org * Manager EMC Lab * * TEL: +49 40 7250 2102 * Kampchaussee 8..32 * * FAX: +49 40 7250 3801 * 21027 Hamburg, Germany * ** * home: Tel: +49 4122 99451 * Hauptstr. 60a * * Fax: +49 4122 99454 * 25492 Heist, Germany* ** ---BeginMessage--- Sender: owner-emc-p...@majordomo.ieee.org Received: from ruebert.ieee.org (ruebert.ieee.org [199.172.136.3]) by dub-img-3.compuserve.com (8.8.6/8.8.6/2.10) with ESMTP id RAA02726; Thu, 26 Feb 1998 17:51:54 -0500 (EST) From: owner-emc-p...@majordomo.ieee.org Received: (from daemon@localhost) by ruebert.ieee.org (8.8.8/8.8.8) id PAA24880 for emc-pstc-list; Thu, 26 Feb 1998 15:34:46 -0500 (EST) List-Post: emc-pstc@listserv.ieee.org Date: Thu, 26 Feb 1998 15:34:46 -0500 (EST) Message-Id: 199802262034.paa24...@ruebert.ieee.org To: undisclosed-recipients:; ---End Message---
RF choke in protective earth
Good Morning. Seeking opinions on use of RF choke in protective earth. Due to invertor circuitry, rf noise is tripping GFCI. Series coil in P.E. appears to solve problem. RF coil will not effect 10-25 A PE safety test done at 60 Hz. Also coil shall be equivalent to AWG of PE conductor to pass equivalent ground fault circuitry. Nevertheless, it is disconcerting to place a series component in the Protective earth conductor. Comments are appreciated. Thank You Rich Lanzillotto rl...@concentric.net
RUSSIA
To: the whole group, Does anybody have any information regarding EMC and safety requirements in Russia. I know that in the past equipment could only be imported with a certificate of conformity prepared by SGS, and that the general EMC requirement was CISPR based (I think!) as to safety I'm not aware of their requirement. However I have heard that this is to be 'phased' out and that the EN guidelines will be used for both EMC and product safety. I really need to know when this will happen or if it has happened and what their requirements will eventually be (specification numbers et al) Thanks very much Paul Smith
RE: Antenna Factors of 3 Antennas
Look for ANSI C63.5, telephone: 212.642.4900, http://www.ansi.org Mirko Matejic -- From: Bailin Ma To: emc-p...@ieee.org Subject: Antenna Factors of 3 Antennas List-Post: emc-pstc@listserv.ieee.org Date: Thursday, February 26, 1998 11:33AM Hi, Is anybody kind enough to give me a hint where I should go to find information on how to calibrate antenna factors of three antennas by using those three antennas themselves. Thank you. Best Regards, Barry Ma 408-778-2000 x4465 408-778-0239 Fax
Antenna Factors of 3 Antennas
Hi, Is anybody kind enough to give me a hint where I should go to find information on how to calibrate antenna factors of three antennas by using those three antennas themselves. Thank you. Best Regards, Barry Ma 408-778-2000 x4465 408-778-0239 Fax
Precipitation Static
I realize this may be slightly out of scope for this group, but maybe someone has experience in this matter. I need to analyze how adding antennas to an aircraft will affect p-static dissipation for the aircraft. Specifically I would like to know how the number of dischargers required for a specific surface area is determined. Any advice or references will be greatly appreciated. _ Jeff Bruce EME EngineerRaytheon Systems Co. (903) 457-4187 Electromagnetic Effects Fax: (903) 457-7640 Box 6056, CBN 024 bruc...@gvl.esys.comGreenville, TX 75403 The opinions expressed here are mine and not that of my employer.
Country indication
Dear all, I find it a little wast of time to read about seminars and job's in parts of the world where I never will come. Could we all try to include an indication in the beginning of the mail of where in the world jobs and training happens. Also for you Americans I'm not familiar with your abbreviations of your states (but I'm learning). Best regard and thank's for a very interesting and helpfull group, Mr. Kim Boll Jensen (Denmark)
Re: Publishing QAs
Bill Thanks for your reply. Our intention is to publish a few of the more interesting QAs as a service to our UK readers. At the suggestion of Rich Nute we will do this having first obtained permission and we will naturally give full credit to all sources, which hopefully should result in more subscribers to this and your newsgroup.We simply believe that it is all part of the communications mix and the more avenues that encourage interactive technical discussion the better. Yes please keep posting the FAQs on your news group. We may start a UK newsgroup but will contact you direct as this is really a UK domestic matter. We hope this fully clarifies our position and intentions. Alan E Hutley Editor and Publisher UK EMC Journal nutwoo...@msn.co.uk www.emc-journal.co.uk -Original Message- From: Bill Lyons b...@lyons.demon.co.uk To: nutwoo...@email.msn.com nutwoo...@email.msn.com; emc-p...@ieee.org emc-p...@ieee.org List-Post: emc-pstc@listserv.ieee.org Date: Wednesday, February 25, 1998 10:52 Subject: Re: Publishing QAs In message 05d573029041928upimssmtpus...@email.msn.com Alan E Hutley writes: We publish the UK EMC Journal and would like to publish some of the QAs that appear here. Does anyone out there have a problem with this. Your comments would be welcomed. We want to build up a list of FAQs which will also be published on our web site. Alan, As you know, I have included your QA FAQs (in the sense of a set of specific frequently-asked questions and their answers) in the FAQ (in the sense of a listing of material and sources) which I update each month for the s.e.e.c (sci.engr.electrical.compliance) newsgroup. I have been for many months sending a short announcement of the monthly update to EMC-PSTC (and also, for that matter, to TREG), which seems to have met with general approval, or at least nobody has ever expressed disapproval. What I have not done, nor would I think appropriate, is to mail the lengthy FAQ itself to the mailing list. I think the point of mailing lists like EMC-PSTC is that they are for questions and discussions on specific topics as they arise, not for posting of general material, however valuable. Short pointers to the availability (elsewhere) of such material is useful, or at least not objectionable. Occasionally there might be a specific announcement from someone in the know of a new piece of information, but I would have thought regular mailings of quasi-tutorial material not appropriate. The alternative, of course, is to start your own mailing list for dissemination of whatever material you choose, in which case I am sure participants in EMC-PSTC would not object to an announcement of your mailing list so they can subscribe if they choose. Hope you (and other readers) won't mind a slightly different query, Alan, which is whether you wish your QA FAQs to continue to appear in the s.e.e.c FAQ, and if so whether you can provide updates. (The s.e.e.c FAQ is available at http://world.std.com/~techbook/compliance_faq.html) Regards to all, Bill. -- Bill Lyons - b...@lyons.demon.co.uk / w.ly...@ieee.org (maintainer of the s.e.e.c FAQ)
ESD Protection for 100BASE-T?
Folks, How does one provide ESD immunity for 100BASE-T ethernet ports without interfering with the signal? Thanks for listening. Mike Donnelly
fw:Nortel Job Opportunities in EMC Product Safety
---forwarded-message Feb 24 15:07 1998 To:'emc-p...@majordomo.ieee.org' (BNR400) From: Nathan Belsher:0H32(BNR) BNRTP BNR Subject: Nortel Job Opportunities in EMC Product Safety Nortel (Northern Telecom), a leading global manufacturer of telecommunications systems has some outstanding career opportunities at its Research Triangle Park facility near Raleigh, North Carolina. In the wireless and broadband product integrity group, two openings in the area of EMC and Product Safety present opportunities for advanced career development. Senior EMC Engineer (Job # X36322) Reporting to the manager of the wireless and broadband product integrity group, this senior level position provides EMC design guidance for new existing high tech products. You will define EMC requirements for product development and team with packaging and electrical designers to ensure EMC requirements are met. You will also conduct simulation activities of circuit pack layouts and other subsystems to optimize EMC performance and generate EMC test plans to verify hardware and systems integrity. To qualify you will need a sound electrical engineering and design background in RF and EMC reduction techniques and immunity . You should also be familiar with telecom systems, EMC analysis techniques and tools (PCB and System Level), and EMC standards such as FCC part 15, FCC part 68, EN55022, and IEC 801. Excellent communication and project management skills are also required. Senior Product Safety Engineer (Job # X36329) Reporting to the manager of the wireless and broadband product integrity group, this senior level position provides Product Safety design guidance for new high tech products. You will define the Product Safety requirements for product development and team with packaging and electrical designers to ensure the safety requirements are met. You will conduct new product safety reviews and provide input to designers of circuit packs and systems. To qualify you will need a sound electrical or mechanical engineering background in product design and agency approval. You should also have a thorough working knowledge of UL, CSA, and IEC product safety design. Familiarity with UL1950, EN60950 and principal country deviations is a must. Excellent commuunication and project management skills are also required. Nortel offers excellent compensation and benefits. For confidential consideration, please e-mail your resume to karen_kirche...@nt.com or, mail to Nortel, U.S. Resource Center, P. O. Box 13010, (Job # ), Dept. 1175/NTP, Research Triangle Park, NC. 27709. We thank all applicants for their interest but only those selected for an interview will be contacted. Nortel is an equal opportunity/affirmative action employer proud to maintain a drug and smoke free workplace. NORTEL posted by Nathan Belsher nbels...@nortel.ca
Publishing QAs
Hello Everyone We publish the UK EMC Journal and would like to publish some of the QAs that appear here. Does anyone out there have a problem with this. Your comments would be welcomed. We want to build up a list of FAQs which will also be published on our web site. Best Regards Alan E Hutley Editor and Publisher UK EMC Journal Nutwood UK Ltd http://www.emc-journal.co.uk
Australian Medical Approval
I am working on an electronic medical device certification for one of our customers. The product has already passed CE (EMC)requirements, EN60601-1-2, including CISPR 11 Emissions testing. From an EMC standpoint, do we need to do anything besides emissions for AS/NZS 2064, 12? It doesn't seem that this product can go through the ISM self-declaration route. The ACA has strongly suggested that I contact the TGA (Therapeutic Goods Administration) for further information. I have a phone and fax number (no contact person). Does anyone have any additional information? A contact? An E-mail? A Website? Todd Robinson Marketing Manager CKC Laboratories, Inc. 800-500-4362 http://www.ckc.com
conductive coatings
anybody have any opinions on conductive coatings on plastic for rfi/emi protection? we've been very successful at designing our products to be quiet and immune even in plastic boxes but i've been asked to look into conductive coatings for further protection. i've ordered some spray/brush on coatings but is it a waste of time? I was hoping to find spray can samples but haven't, anybody know of spray bomb coatings? also looking into vacuum application. I guess i'd like to try spray/brush stuff first just to see if it makes any difference. thanks eric henn...@fp.com
Three Product Safety Openings In Boston Area
American Power Conversion currently has three openings for Product Safety Engineers in Billerica, Mass. The candidate(s) should be familiar with IEC 950. Knowledge of UL 1778, CSA 107.1, EN 50091, and the Low Voltage Directive is a plus. Ability to process paperwork and an attention to detail is a must. The job consists of, but is not limited to, interfacing with various approval agencies(UL, CSA, VDE, TUV, PCBC, etc.), resolving factory variation notices, and conducting safety tests to IEC 950, UL 1778, CSA 107.1, and EN 50091. Openings are for associate engineer, engineer, and senior engineer. Contact: Bill Burks American Power Conversion 755 Middlesex Turnpike Billerica, MA 01821 Telephone: 978-670-2440 ext 303 Fax: 978-670-2380
Re: Ground Hog Day. -Reply
Hate to be another ditto but I'm also seeing this effect with emc-pstc and some other listservers with which I'm subscribed.
ABNT standards/license in Brazil
Greetings, This is in follow-up of the thread started last week, regarding standards requirements for Brazil. There were numerous requests for the address for the ABNT, so I'm sending this to the entire forum, rather than answer individually. Comitê Brasileiro de Eletricidade - COBEI Associação Brasileira de Normas Técnicas - ABNT Rua Líbero Badaró, 496 - 3.o andar Caixa Postal 8363 São Paulo, SP, CEP 01008 Brasil For those of you that are accent-challenged, here it goes again, without the accents: Comite Brasileiro de Eletricidade - COBEI Associacao Brasileira de Normas Tecnicas - ABNT Rua Libero Badaro, 496 - 3.o andar Caixa Postal 8363 Sao Paulo, SP, CEP 01008 Brasil Tel: 55 11 239 1155 Fax: 55 11 34 0192 Contacts: Eng. Antonio Sartorio - COBEI Executive Secretary Sr. Milton M. Ferreira - COBEI President Please note, however, that I have not kept track of these gentlemen. This information is about five years old, so there is a good chance that the contact names are no longer valid. But the address should be all right. If anybody has more current information, I'd appreciate an update. For your info, COBEI is the division of ABNT that is responsible for electrical standards. Hope you find this info useful. Regards, __ Egon H. Varju, P.Eng. February 23, 1998 @ 10:53 AM CSA Pacific Region Tel: 1-604-244-6640 HAVE MODEM - WILL TRAVEL Fax: 1-604-244-6600 E-mail:eva...@compuserve.com var...@csa.ca e...@varju.bc.ca __
EN 55103-1 and EN 55103-2
Bonjour de Montreal, I just read in the ERA Safety and EMC Newsletter that Part 1 (emissions) and Part 2 (immunity) of EN 55103 Audio, video, audio-visual entertainment lighting control apparatus for professional use have been published in the Official Journal of the European Communities (OJ). According to the same source, the applicability of these new standards are well defined and rely on the primary function. It also seems that they are written to be consistent with other standards (such as EN 55022 for an PC add-on audio/video card such as Matrox is building) so multiple test and/or limits are not needed. Does anybody has some light to the basic standards, limits and acceptable criteria as defined in these standards ? Thank you in advance, -- Benoit Nadeau, ing. M.ing. (P.eng., M.eng) Gerant du Groupe Conformite (Conformity Group Manager) Matrox http://www.matrox.com/ -- 1055, boul. St-Regis Dorval (Quebec) Canada H9P 2T4 Tel : (514) 969-6000 (x2475) FAX : (514) 969-6275 Internet : bnad...@matrox.com, mailto:bnad...@matrox.com
Re: EN50082-1:1997
Pryor - The 1997 version of the standard cannot be used as sefl-certification standard until it is referenced in the Official Journal (OJ). The idea was that the OJ would list the standard and also list the date of withdrawal (dow) of conflicting standards (in this case the 1992 edition), effectively giving a transition period. If the OJ does not give a dow then I assume that the DOW listed in the standard will be used to define the end of the transition period. During the transition period, either standard can be used for self-certification of a device. After the transition period, only the 1997 version can be used. So, in answer to your questions: I am getting conflicting opinions on the effectivity of EN50082-1:1997. the dop is 1998-03-01 the dow is 2001-07-01 One opinion is that all NEW products released after the dop (1998-03-01) must meet the 1997 version. Not in my opinion - I believe that the EMC Directive treats each product as it is placed on the market as a NEW product. Also the dop of the standard cannot be used to determine whether or not it can be used for the EMC Directive, it depends on the OJ. A second opinion is that NEW products may meet the 1992 version until the dow (2001-07-01). Depending on the dow listed in the OJ, this is correct (in my opinion) It is generally agreed that existing products have until the dow (2001-07-01) to meet the 1997 version. Correct (in my opinion) I would appreciate and clarification. Best Regards Pryor McGinnis ++ +Mark Briggs MSc CEng, MIEE + + Manager, EMC Consulting Services + + Elliott Labs, 684 W Maude Avenue + +Sunnyvale, CA 94086+ ++ + Phone: +1 (408) 245 7800 x238+ + Fax: +1 (408) 245 3499 + ++ + Email: mbri...@elliottlabs.com + + http://www.elliottlabs.com + ++
Re[2]: FCC Questions.
however, for FCC Rules, Part 68 (telephony) requirements, Registration is the only choice. Many persons confuse the two. Tania Grant, Lucent Technologies, Octel Messaging Division tgr...@lucent.com __ Reply Separator _ Subject: RE: FCC Questions. Author: Frazee; Doug doug_fra...@atk.com at P_Internet_Mail List-Post: emc-pstc@listserv.ieee.org Date:2/23/98 4:18 PM Registration is not a term that I have seen in any FCC publication related to demonstrating device compliance. Section 15.101 publishes a table listing types of devices(unintentional radiators), and authorization required. Types of authorization are: verification, certification, notification and declaration of conformity. For other class B digital devices and peripherals, verification is called out. Testing must be performed at a listed FCC test site and kept on file by the manufacturer. No application, fees or data submittal to the FCC is required for this class of equipment. Doug Frazee EMC Compliance Engineer Windermere Information Technology Services (WITS) 401 Defense Highway Annapolis, Maryland 21401 USA Tel:(410) 266-1793 FAX:(410) 266-1853 doug_fra...@atk.com -- From: Mike Palmer[SMTP:mpal...@ndigital.com] Sent: Monday, February 23, 1998 7:36 AM To: emc-p...@majordomo.ieee.org Subject: Re: FCC Questions. Doug McKean wrote: *snip* Yes. CFR 47 Part 15 specifies not only minimum frequencies at which your little device operates (I believe anything above 7kHz) but also power (I believe anything above picowatts). I'm positive someone here will list the specifics. I unfortunately do not have the standard in front of me. Specifically do I need to: 1.a) Spend money having someone test emissions. Yes. For reason why see answer to 1.b) below. 1.b) File some paperwork with the FCC. Yes. Since your device will be used in a residence, you will need Class B which involves registration. Registration will cost you. What if said microcontroller-based device is designed primarily for use within an automobile and is, again, not an intentional transmitter (e.g. say, a PIC-based performance computer or a data aquisition unit etc). Does the fact that it's not for use in residential areas loosen the FCC restrictions at all? -- - Mike Mike Palmer Design Engineer Northern Digital Inc. Received: from curly.eng.octel.com (148.147.200.26) by m-internet.corp.octel.com with SMTP (IMA Internet Exchange 2.1 Enterprise) id 00043FEF; Mon, 23 Feb 98 14:49:14 -0800 Received: from gw3.octel.com (gw3.octel.com [148.147.1.15]) by curly.eng.octel.com (8.6.12/8.6.12) with ESMTP id OAA27551; Mon, 23 Feb 1998 14:53:27 -0800 Received: (from daemon@localhost) by gw3.octel.com (8.6.10/8.6.12) id OAA06372; Mon, 23 Feb 1998 14:52:57 -0800 Received: from ruebert.ieee.org(199.172.136.3) by gw3.octel.com via smap (V1.3) id sma006285; Mon Feb 23 14:52:32 1998 Received: (from daemon@localhost) by ruebert.ieee.org (8.8.8/8.8.8) id RAA04172 for emc-pstc-list; Mon, 23 Feb 1998 17:17:53 -0500 (EST) Message-ID: F1AB88C8C043D011875C00805FD426B856AE5B@Exchange_WV1.ATK.COM From: Frazee, Doug doug_fra...@atk.com To: emc-p...@majordomo.ieee.org, Mike Palmer mpal...@ndigital.com Subject: RE: FCC Questions. List-Post: emc-pstc@listserv.ieee.org Date: Mon, 23 Feb 1998 16:18:32 -0600 X-Priority: 3 X-Mailer: Internet Mail Service (5.0.1458.49) Sender: owner-emc-p...@majordomo.ieee.org Precedence: bulk Reply-To: Frazee, Doug doug_fra...@atk.com X-Resent-To: Multiple Recipients emc-p...@majordomo.ieee.org X-Listname: emc-pstc X-Info: Help requests to emc-pstc-requ...@majordomo.ieee.org X-Info: [Un]Subscribe requests to majord...@majordomo.ieee.org X-Moderator-Address: emc-pstc-appro...@majordomo.ieee.org
CE question
I have a question regarding a unique piece of equipment to be shipped to the EC. It is is a training system used specifically at schools for vacuum training courses. Several components which make up this system are CE marked while a few are not. My question is Is there an exception to the the EMC/LV directives which allows such training products to be shipped without compling? If so, what and where? and also, what paperwork would be required to accompany the equipment? Any help is appreciated. Regards, Lisa Cefalo cefa...@mksinst.com
RE: CE question
Dear Eric, I do not think that you should interpret the list as mentioned below as a list of equipment falling under the EMC-directive. It is a list showing which apparatus might get disturbed by a not-EMC apparatus, and showing the relative importance of the EMC-directive related interference problems. This list is related to the Essential Requirements, and when the interference of an apparatus must be judged USING ESSENTIAL REQUIREMENTS -thus by a competent body- their investigation will be directed towards the prevention of interference to apparatus on this list. Educational apparatus show up here as a victim of EMC not as the cause. Educational equipment is however enumerated in the Guidelines, with the exception for studying Electro-magnetic phenomena in educational, research and training. They will however generate interference too, and as ALL electric and electronic apparatus have to fulfill essential requirements, educational equipment does too. However many educational equipment is used to show electronic principles and theory of operation, and is therefore constructed with an open architecture, often in the form of building blocks. Resistors, transistors meters, on a low level of integration and f.a. full microprocessor systems, FM-modulators, data acquisition boards etc at a high level of integration. There is no way in which interference from this kind of set up can be inherently prevented. The combination of misc. blocks is clearly some kind of experiment, very much related to the proto-type phase in an industrial environment. To my opinion in both applications there is some educational/learning function in the set up, and both relate to the same practical problems in application of the directive. The GUIDE to the EMC-directive (available on my website http://www.cetest.nl/features.htm in WORD format) excludes experiments form radio-amateurs if non-commercial. This is clearly not the route for educational systems. There are 2-3 other ways of showing exclusion from the directive - the educational building blocks are shown to be a component , having no direct function - the educational equipment has a EM studying function ( electronics is just a special case of EM-phenomena) , although this is clearly on the edge and was certainly not the authors had in mind (5.2.9) - the educational set up is not a finished product.(direct function is undefined) 3.7 Your second question regarding the definition of an experiment, becomes easy now: an experiment is a not-finished product. The reasons, as shown before should NOT be applied to any educational apparatus with a clear and definite function, such as demonstration voltmeters, demonstration computers, and has been intended to show a way of producing electronic or mixed technology KIT type equipment, used to show many different principles in an educational environment. Let me know what you think (group members too ) Regards, Gert Gremmen == CE-test, qualified testing, Consultancy, Compliance tests for EMC and Electrical Safety 15 Great EMC-design tips available ! Visit our site : http://www.cetest.nl The Dutch Electronics Directory http://www.cetest.nl/electronics.htm == -Oorspronkelijk bericht- Van:eric.lif...@natinst.com [SMTP:eric.lif...@natinst.com] Verzonden: dinsdag 24 februari 1998 23:52 Aan:cet...@cetest.nl CC: cefa...@mksinst.com; emc-p...@ieee.org Onderwerp: RE: CE question Ing. et al, I looked into this some time ago and determined that educational devices do not have an exemption under the EMC Directive, I quote it here: Quoting --- The maximum electromagnetic disturbance generated by the apparatus shall be such as not to hinder the use of in particular the following apparatus: (a) domestic radio and television receivers (b) industrial manufacturing equipment (c) mobile radio equipment (d) mobile radio and commercial radiotelephone equipment (e) medical and scientific apparatus (f) information technology equipment (g) domestic appliances and household electronic equipment (h) aeronautical and marine radio apparatus (i) educational electronic equipment (j) telecommunications networks and apparatus (k) radio and television broadcast transmitters (l) lights and fluorescent lamps. --- End Quote Item (i) clearly states that educational electronics are within the scope of the EMC Directive. Unless, is there some other directive that supercedes or augments 89/336 that reverses this requirement? What is your definition for an experimental device? I am curious because we have an educational product (made up strictly by electronics) that we redesigned and EMC tested for CE Mark compliance. Eric Lifsey Compliance Engineer National Instruments Ing. Gert Gremmen cet...@cetest.nl on 02/24/98 02:47:00 PM Please
FW: EMC/safety Requirements in South America?
I am resending this inquiry, due to the very limited responses, if you have information that can help me, please pass it along. Thanks! -- From: Frazee Doug[SMTP:dfra...@windermeregroup.com] Sent: Monday, March 02, 1998 3:15 PM To: 'emc-p...@ieee.org' Cc: Banchero, Bill Subject:EMC/safety Requirements in South America? I am always looking for convenient sources of international compliance information. Most recently, my need is for a client that manufactures Ground Stations for use in air traffic control. The ground stations include an intentional RF transmitter currently approved for the US as well as several European countries, a router and VME card cage with digital electronics. Approved modems for the ground station are purchased in the destination country and installed during deployment of the ground station. The ground station currently has been tested to the LVD (EN 60950) and EMC Directive (EN 50081-1/2). European EMC and safety testing was performed by independent US compliance laboratories (self declaration). Transmitter approvals were performed by a European Notified Body contracted by the European manufacturer of the radio. Our client wishes to deploy these ground stations in the following countries: Peru Paraguay Columbia Venezuela Guiana Equador Bolivia Chile I need to determine what transmitter approval, EMC and safety requirements exist in these countries for this device and whether additional testing needs to be performed. I do not like to burden this group with questions of this sort, but I do not have sources for this type of information. Any leads or help would be greatly appreciated. Doug Frazee EMC Compliance Engineer Windermere Information Technology Services (WITS) 401 Defense Highway Annapolis, Maryland 21401 USA Tel:(410) 266-1793 FAX:(410) 266-1853 dfra...@windermeregroup.com
job opportunity
BABT Product Service is currently looking for a lead EMC Engineer for our facility located in Santa Clara California. The requirements include a strong technical background with skills in providing customers with EMC solutions through troubleshooting or design techniques. This person must have an understanding of the current national/international emissions and immunity standards for EMC testing. The candidate must also have good communications skills, the ability to work well with customers and lead a team of engineers and technicians. Requires a BSEE and 5+ years' related experience, Please forward resume to: Tim O'Shea TÜV Product Service 1775 Old Highway 8; Suite 103 New Brighton MN 55112-1891 fax: 612 638 0285 email: tos...@tuvps.com
FDA classification for electrocardiographs
We have submitted a 510(k) file for one of our ECG devices. The indication for use is to be used by a physician to analyze cardiac performance and in the description we say: can be equipped with a resting interpretation program offered to the physician on advisory basis only. We classified it as a 74DPS Class II device. The reviewer has told us that in view of the interpretative ECG capabilities of your device, it will be placed into regulatory class III, with product code of 74DSI My questions are: 1. Why FDA considers of higher concern a device equipped with an interpretation program whose analysis the physician is asked to over-read and validate or change? 2. Where can you find detailed classification rules? 3. Why such a device has to be classified as a DSI (Arrhythmia Detector and Alarm) as it could produce a audible or visible signal or alarm when an arrhythmia exists while the physician is not on the bed side? Thanks for any answer. Massimo --- ESAOTE S.p.A. Massimo Polignano Research Product Development Regulatory Affairs Via di Caciolle,15 tel:+39.55.4229402 I- 50127 Florencefax:+39.55.4223305 e-mail: regr...@esaote.com
Re: Seminars:EMC/EMI/ESDRelated to Corrosion and Material Reliability Issues
-Original Message- From: Richard Haynes vale...@pluto.njcc.com To: emc-p...@ieee.org emc-p...@ieee.org; t...@world.std.com t...@world.std.com; e-saf...@dorado.crpht.lu e-saf...@dorado.crpht.lu Cc: Michael J Azar mja...@emc-turntech.com; Tom Tortoriello tomtort...@aol.com; Matejic, Mirko mmate...@foxboro.com; Bob Alongi sec.bos...@ieee.org Date: Tuesday, February 03, 1998 12:53 PM Subject: Seminars:EMC/EMI/ESDRelated to Corrosion and Material Reliability Issues Greetings, Presentations on the above named subject matter are scheduled for various times through this year in California, New Jersey, Mass. and Ga. If interested in details, please contact by private e-mail to: NJ: Thomas Tortoriello, 732-842-8900, nmius...@aol.com March 10 12, May 2628 CA: Michael Azar, 650-988-6647, mja...@emc-turntech.com March 17 19, June 9 11, Sept 8 11, Nov. 10 12 Mass: May 6th, Mirko Matejic, Pres. IEEE EMC NE, 508-549-3185, mmate...@foxboro.com Mass: May 16th, Bob Alongi, IEEE Boston, 617-890-5290, sec.bos...@ieee.org Ga: April 8th, 3:00 p,m,
Re: Seminars:EMC/EMI/ESDRelated to Corrosion and Material Reliability Issues
EMC/EMI/ESD Issues Related to Corrosion and MaterialsReliability Greetings, Presentations on the above named subject matter are scheduled for various times through this year in California, New Jersey, Mass. and Ga. If interested in details, please contact by private e-mail to: NJ: Thomas Tortoriello, 732-842-8900, nmius...@aol.com March 10 12, May 2628 CA: Michael Azar, 650-988-6647, mja...@emc-turntech.com March 17 19, June 9 11, Sept 8 11, Nov. 10 12 Mass: May 6th, Mirko Matejic, Pres. IEEE EMC NE, 508-549-3185, mmate...@foxcorro.com Mass: May 16th, Bob Alongi, IEEE Boston, 617-890-5290, sec.bos...@ieee.org Ga: Atlanta, April 8, Madhaven Swaninathan, manhavan.swaninat...@ee.gatech.edu 1/2 and 1 day Courses are planned. File Attachment: ATT00091.htm
fu: GTEM cell abstract
PSNet Thanx to Mirko Matejic for pointing out this acceptance of GTEM's which is useful for products evaluated to US requirements. Ideal correlation between GTEM and OATS is not expected. Few years ago in a Public Notice FCC laid out conditions for accepting final compliance data from GTEMs. Mirko Matejic My purpose in reporting these abstracts is more educational... hopefully to more understand the basis for requirements and tools used to demonstrate compliance... that way companies will not get caught misapplying the tools in some way that leads to non-compliance... I would hope that others would offer such educational information on this net also... - - - - - Peter E Perkins Principal Product Safety Consultant Tigard, ORe 97281-3427 +1/503/452-1201 phone/fax p.perk...@ieee.org email visit our website: http://ourworld.compuserve.com/homepages/peperkins - - - - -
RF Wiring to NEC Requirements
What article of the US National Electrical Code specifies the wiring installation requirements for rf outputs of commercial transmitters (not amateur) from the transmitter output to the antenna? The best I can find is Article 820 but that may be a stretch.
RE: abstract: GTEM correlation paper
Ideal correlation between GTEM and OATS is not expected. Few years ago in a Public Notice FCC laid out conditions for accepting final compliance data from GTEMs. Mirko Matejic The Foxboro Company Foxboro, Massachusetts
Metric for Japan EU
[fixed date below] Recently there was two seperate comments on this list server about a new metric-only requirement for Japan with a possible deadline of 1-1-199[9]. In chasing down this issue, I have the following tentative and marginally useful info (in other words, normal internet banter) to share with the group: The US Dept of Commerce says there is no such requirement in Japan, metric is preferred, dual units are still acceptable. The same source reports that the EU Metric Directive has spawned a petition from the USA asking for a delay in it's implementation; the EU is reported to be agreeable to such a delay. However, as of this time there is no actual agreement on the EU Metric Directives delay. The Commerce Dept spokesperson recommended the following web site to watch for related topics: http://www.qualitydigest.com/ I am not terribly comforted by the info provided on Japan, the EU info seemed to be potentially interesting but is too premature to get very excited about. Regards, Eric Lifsey National Instruments
IEC 364
Does anyone know what chapter(s) of IEC364, Electrical Installations of Buildings, covers signalling and control circuits? These circuits may be called band 1 and band 2 circuits.
EMI room filters
I am looking for 10 - 12 pre-owned filters for shielded enclosures. The filters should be: 277VAC 60 - 100 A 100dB DC-18GHz If you have any of these items that you are trying to get rid of, please contact me directly. Bob Martin ITS - Northeast Boxborough MA (978)263-2662 fax (978)263-7086 r...@itsqs.com Thanks.
RE: RF choke in protective earth
That is the very choke that one would look for during a laboratory assessment. For (conducted) emission measurements with open, 400 uH, ground the safety ground, PE, is still connected (at 50 Hz). Such component does not violate any safety standards that I can think of. Matthias R. Heinze TUV Rheinland -Original Message- From: Ing. Gert Gremmen [SMTP:cet...@cetest.nl] Sent: Friday, February 27, 1998 12:40 PM To: 'rlanz' Cc: 'EMC POST' (E-mail) Subject:RE: RF choke in protective earth Hello Rich, RF-earth coil are common practice in Inverter circuits. Special chokes exist for this purpose and are even incorporated into approved mains filter designs. One of the shelf laying on my table has a earth series coil having a 1 mOHM resistance. The type is Schaffner 343-3/05. Inductance is 400 uH. The thing is IEC 950 compatible acc. to Schaffner. Regards, Gert Gremmen == CE-test, qualified testing, Consultancy, Compliance tests for EMC and Electrical Safety 15 Great EMC-design tips available ! Visit our site : http://www.cetest.nl The Dutch Electronics Directory http://www.cetest.nl/electronics.htm == -Oorspronkelijk bericht- Van:rlanz [SMTP:rl...@concentric.net] Verzonden: vrijdag 27 februari 1998 15:56 Aan:emc-p...@ieee.org Onderwerp: RF choke in protective earth Good Morning. Seeking opinions on use of RF choke in protective earth. Due to invertor circuitry, rf noise is tripping GFCI. Series coil in P.E. appears to solve problem. RF coil will not effect 10-25 A PE safety test done at 60 Hz. Also coil shall be equivalent to AWG of PE conductor to pass equivalent ground fault circuitry. Nevertheless, it is disconcerting to place a series component in the Protective earth conductor. Comments are appreciated. Thank You Rich Lanzillotto rl...@concentric.net
