Executive Search - Technical Management - Electronics
I have been asked to post this ad: Established, international technology development organization in the greater Boston, MA area need an Assistant Group Director/Senior Project Manager for their Electrical and Electronics Systems Group. The group is engaged in the development of advanced electronic and electromagnetic controls, actuators, sensors and shielding systems for use by commercial, industrial and government customers in a variety of applications including utility system management, active electromagnetic signature control, and remote control of electrical power. For more information and a complete job description, please contact: Adam M. Smith Vice President The Abbott Group Tel (410)757-4100 Fax (410)757-9034 Email: abbotts...@aol.com
IEC 950 amd. 4
Dear emc-pstc colleagues: I have heard a rumor that IEC 950 amd. 4 is removing the "two layer" option for supplementary insulation. (see section 2.9.4.2: "Thin Sheet Material"). This leaves only the three layer option. Does any one know if this is true? Thanks a lot for your feedback! Mel PedersenMidcom, Inc. Homologations Engineer Phone: (605) 882-8535 e-mail: mpeder...@midcom.anza.com Fax:(605) 886-6752
Re: O.A.T.S. enclosure
Hello, We built a 3 Meter site a few years back - maybe some of our experiences will help. We built it using all wood framing with nails no bigger than 16 penny (about 2" to 2 1/4"). We have two windows with plastic frames (to let in some light), a ridge vent that is made of cardboard (for ventilation), and a ridge pole that is made of plywood. The outer surface is plastic house siding. We used asphalt roof shingles. The thing looks like a ski slope with the peak at the maximum for the adjustable antenna. We had no problem staying within the 4 dB limits. We have passed every year so moisture must not be too much of a problem. We have a different problem in that the water table is very high here and we couldn't put a basement under our site, so we built up. Our ground plane is eight feet off the ground. It works fine for a 3 Meter site but there is no way to move outside and use it as a 10 Meter site. That also makes the building very very tall. Bill Franklin wfrank...@bb-elec.com > > Winter is coming and Hurricane Fran took my fabric-type Air Support > structure with him leaving my 10 meter "all-weather" Open Air Test Site as a > "fair-weather" site. :>( > > How about passing on your experiences regarding problems with any particular > types of PERMANENT building schemes to enclose RFI test sites. What (other > than the obvious conductive types) materials will erode my site attenuation? > Will I have to be concerned about things such as moisture content of the > framing? > > What types of designs yield a robust structure, yet allow for the 6 meter > high antenna clearance so the antenna can be moved from the 1m position to > the 10m position without dropping the mast? > > Thanks > > Joe > Joe Tolbert > GENICOM Corp. > Waynesboro, VA > jtolb...@genicom.com > >
Switzerland requirements
PSNet Although Switzerland is surrounded by the European Union, they are determined not to be legal a part of it. With regard to their requirements however, as I remember they are using all of the EU requirements for equipment developed to meet the CE marking scheme. Now, will the Swiss accept commercial and industrial equipment that is only CE marked? Or do they want some further evidence of compliance? Are they on the same introduction timeline for the requirements (Machinery Directive last year, EMC Directive this year, and the Lo Voltage Directive next year)? Wot else do we know on this? :>) br, Pete Perkins - - - - - Peter E Perkins Tigard, ORe 97281 +1/503/452-1201 phone/fax p.perk...@ieee.org email - - - - -
Re: UL 1950/CSA 22.2 No. 950
Hello Tran, This thread now seems headed off in new, un-intended, directions. The question of the relative Benefits and Disadvantages of Recognized Components was not the focus of this discussion. This particular thread was initiated to discuss my recent awareness, that in UL 1950 / CSA 22.2 No. 950, Third Edition, the previously hard and fast UL requirement for Recognized Insulation Systems (RISs), never before relaxed in my experience (14 years in this business), no longer appears hard and fast. The harmonized UL/CSA ITE Standard now provides for the use of insulation in compliance with CSA 22.2 No. 0, in lieu of RISs, for insulated coils operating above 105 Deg/C. Thus, materials suitably rated as Class B,F,H, N, etc, are useable without having to satisfy RISs requirements. This has great import, both time-wise and $$-wise for manufacturers. It is especially valuable for manufacturers of ITE, located outside of the U.S. who are usually surprised and dismayed when they first learn of the RISs approach to coil insulation. To my knowledge and supported by Egon Varhu's earlier input, only the UL Standards required RISs. That solo requirement now appears to have an alternative. Regards, Art Michael A.E. Michael, Dir. of Engineering Product Safety Int'l 166 Congdon St. East, Middletown CT 06457-8061 U.S.A. Phone : (860) 344-1651 Fax: (860) 346-9066 Email : p...@connix.com Website: http://www.safetylink.com P.S. In my response to Egon Varhu on this topic earlier this morning, I have just noted a mistake in the last long paragraph. It begins "Within UL, to my knowledge, other than for this provision in UL1446 ..." The standard number mentioned should be UL 1950 (and not UL 1446). Sorry for any confusion I may have caused. :-(
Re: UL 1950/CSA 22.2 No. 95
Reply to: RE>>UL 1950/CSA 22.2 No. 950 Art and Egon, In general, the recognized or certified components program is set up to facilitate component and material manufacturers in selling their products to user or manufacturers. If you selected a right and applicable recognized/certified component or material for using in your assembly or product assembly, it will help to simplify the investigation/certification for that product. If you, as a manufacturer who has the ability to design and build your products (including the P.S.) from the raw material and component level ( because you could not find the right component or material for your specific product), you have the following benefits and disadvantages: Benefits - 1) You have the complete control of your final product manufacturing process. 2) You do not have to pay for other people overhead cost. 3) You do not encount unexpected changes or out-of-business or MD from suppliers and vendors. 4) You have the control of the planning and expansion or enhancement of the product. 5) It will cost you less because less unexpected occurences after production. Disadvantages: 1) Investigation and testing will take longer. 2) It will cost more at the beginning. 3) It could take a longer factory inspection. So, You have to weight the benefits and disadvages before you make your decision. Others may have some different opinions. As usual, opinion is my own Best regards, Bao Tran, P.E. Nortel/NTI Richardson, Texas Bao.Tran. 0189...@nt.com -- List-Post: emc-pstc@listserv.ieee.org Date: 10/3/96 8:15 AM To: Bao Tran From: Egon H. Varju - E X T E R N A L L Y O R I G I N A T E D M E S S A G E - The way most safety agencies look at this is that if all the materials used meet or exceed Class B requirements, then the transformer is Class B. BTW UL1950/CSA950 requires components to meet the requirements of UL _and_ CSA (not _or_!). But nowhere in the standard does it say that any or all components must be UL and/or CSA certified. Any uncertified component may be used, as long as it is tested and/or examined to ensure compliance with the applicable standards. If you have a recognized insulation system, then this makes life easier; otherwise, surely the agency engineer should be capable of examining the materials used to ensure compliance. Just my personal opinion Egon Varju -- RFC822 Header Follows -- Received: by nrchq1.rich1.nt.com with SMTP;3 Oct 1996 08:15:03 U Received: from ruebert.ieee.org by corpgate.nt.com with SMTP (PP); Thu, 3 Oct 1996 13:11:02 + Received: (from daemon@localhost) by ruebert.ieee.org (8.7.5/8.7.3) id HAA13656 for emc-pstc-list; Thu, 3 Oct 1996 07:49:17 -0400 (EDT) List-Post: emc-pstc@listserv.ieee.org Date: 30 Sep 96 19:01:47 EDT From: "Egon H. Varju" <73132.2...@compuserve.com> To: Art Michael Cc: IEEE Subject: Re: UL 1950/CSA 22.2 No. 950 Message-ID: <960930230147_73132._iho9...@compuserve.com> Sender: owner-emc-p...@mail.ieee.org Precedence: bulk Reply-To: "Egon H. Varju" <73132.2...@compuserve.com> X-Resent-To: Multiple Recipients X-Listname: emc-pstc X-List-Description: Product Safety Tech. Committee, EMC Society 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
IEC 950 amd. 4
Dear emc-pstc colleagues: I have heard a rumor that IEC 950 amd. 4 is removing the "two layer" option for supplementary insulation. (see section 2.9.4.2: "Thin Sheet Material"). This leaves only the three layer option. Does any one know if this is true? Thanks a lot for your feedback! Mel PedersenMidcom, Inc. Homologations Engineer Phone: (605) 882-8535 e-mail: mpeder...@midcom.anza.com Fax:(605) 886-6752
EMC test cell
Bonjour, I am currently looking for a EMC test cell. The dimensions of the EUT that are going to be tested in this enclosure are 1 cubic meter (3.3 cubic feet). I want the enclosure to be at least capable of pre-compliance in the emission as well as in susceptibility. If you could give me some pointers on how to choose a test cell, I would greatly appreciate. I would also like to know if a test conducted in a test cell will be valid in regards of the European market. Thank you for your time. Stephane Marcouiller Teknor industrial computers EMC lab. smarc...@teknor.com
O.A.T.S. enclosure
Winter is coming and Hurricane Fran took my fabric-type Air Support structure with him leaving my 10 meter "all-weather" Open Air Test Site as a "fair-weather" site. :>( How about passing on your experiences regarding problems with any particular types of PERMANENT building schemes to enclose RFI test sites. What (other than the obvious conductive types) materials will erode my site attenuation? Will I have to be concerned about things such as moisture content of the framing? What types of designs yield a robust structure, yet allow for the 6 meter high antenna clearance so the antenna can be moved from the 1m position to the 10m position without dropping the mast? Thanks Joe Joe Tolbert GENICOM Corp. Waynesboro, VA jtolb...@genicom.com
Re: UL 1950/CSA 22.2 No. 950
Hello Egon, My comments follow your responses. -- On 30 Sep 1996, Egon H. Varju wrote: > The way most safety agencies look at this is that if all the materials used > meet or exceed Class B requirements, then the transformer is Class B. I agree (with the exception of UL who normally requires compliance with UL 1446 when a "system" of materials. The point of this thread is that I've apparently located a situation in which UL will accept a "non-system" of materials for coils operating above Class A (105 Deg/C) conditions. I believe this to be a unique situation but it may show up in other harmonized standards that I am not familiar with. > BTW UL1950/CSA950 requires components to meet the requirements of UL _and_ CSA > (not _or_!). I refer you to Annex P.2 (pages 208 and 209) of the Third Edition (the Harmonized Standard); The second sentence reads, "In the U.S. and Canada, any of the following components which comply with EITHER the specified UL or CSA standards are considered to comply with the requirements of this standard."When one drops down to the item addressing Sub-clause 2.2.2 - Insulating materials, the ALTERNATIVE standards listed are, UL 1446 or CSA 22.2 No. 0.(the capitalized emphasis is mine) Note: I spoke with Tiki Wong in your Rexdale/Etobicoke office and he concurs with my position. Also, I spoke with Norm Hellriegel (the Insulation Systems' guru at UL's Melville office, and he agreed with my reading of the standard, but did offer the caveat that he was not extremely familiar with the harmonized ITE standard and its requirements (nor would I expect him to be). > But nowhere in the standard does it say that any or all components > must be UL and/or CSA certified. Any uncertified component may be used, as > long as it is tested and/or examined to ensure compliance with the applicable > standards. If you have a recognized insulation system, then this makes life > easier; otherwise, surely the agency engineer should be capable of examining > the materials used to ensure compliance. Within UL, to my knowledge and experience, other than for this provision in UL 1446, an engineer cannot determine the long-term degradation of a "system" of materials other than by having a UL 1446 Recognized Insulation System in place. I'm not aware of any relief in this requirement if the coil in question operates above Class A conditions (other than in this particular scenerio). > Just my personal opinion > > Egon Varju ThanX for your input. I look forward to continuing this emailversation (a non-standard word coined by me. :-) It would be interesting to learn what other UL or CSA "requirements" may no longer be required when harmonized standards replace individual U.S. or Canadian standards. Regards, Art Michael A.E. Michael, Dir. of Engineering Product Safety Int'l 166 Congdon St. East, Dept. EM Middletown CT 06457-8061 U.S.A. Phone : (860) 344-1651 Fax: (860) 346-9066 Email : p...@connix.com Website: http://www.safetylink.com
RE: Cypress...I really mean Cyprus
Tony: We have done a number of modem approvals in Cyprus, but I have yet to see a copy of the technical specifications. This is due to the fact that we utilize our distributor which handles much of the approval process. Approvals for modems are required in Cyprus. We have always sent in a modem configured to meet the UK requirements. This has always worked well, until we sent them a modem that met NTR3 instead of NET4 or BS6305. Cyprus seems to very similar requirements to the older UK specs and have not changed their requirements in line with NTR3, at least as far as I know. You can try the following authority as they are the ones that tested ours modems and gave us the approvals: Cyprus Telecommunications Authority Telecommunications Street P.O. Box 4929 1396 Nicosia Cyprus Phone: +357 2 310727 Fax: +357 2 310267 The only name I have in my records is E. Kapelides and he works for the Research and Type Approval group. Hope this helps. ...Mike _ Michael Miele Telebit Corporation __ Forward Header __ Subject: RE: Cypress...I really mean Cyprus Author: Tony Fredriksson at Internet List-Post: emc-pstc@listserv.ieee.org Date:9/30/96 5:14 PM BTW, I think I spelled the name of the country incorrectly. It may actually be Cyprus. Any info on regs would still be greatly appreciated. Regards, tony_fredriks...@netpower.com -- From: Tony_Fredriksson To: emc-pstc Subject: RE: Cypress List-Post: emc-pstc@listserv.ieee.org Date: Monday, September 30, 1996 10:03AM All, Anyone know of any special requirements for shipping ITE to Cypress? I don't believe it is part of the EU, EFTA, or EEA although it may be true that what is good for Greece is also OK for Cypress. thx, tony_fredriks...@netpower.com
Re: UL 1950/CSA 22.2 No. 950
The way most safety agencies look at this is that if all the materials used meet or exceed Class B requirements, then the transformer is Class B. BTW UL1950/CSA950 requires components to meet the requirements of UL _and_ CSA (not _or_!). But nowhere in the standard does it say that any or all components must be UL and/or CSA certified. Any uncertified component may be used, as long as it is tested and/or examined to ensure compliance with the applicable standards. If you have a recognized insulation system, then this makes life easier; otherwise, surely the agency engineer should be capable of examining the materials used to ensure compliance. Just my personal opinion Egon Varju
Re: EU Directive on Fire/Toxic Fumes
Richard Woods wrote: > Is anyone aware of an EU Directive on Fire and/or Toxic > Fumes that suposedly is effective Jan 1997? What is the > number of the directive, and what is its scope? Is > electrical and electronic equipment affected? If so, > what standards are in place? I had a look through the Cenelec document "Information on the links between Products, Directives and Standards", and the only reference I could find was: "Fire testing - Cables - Gases evolved during combustion - Degree of Acidity", which is standard HD-602-S1 and is invoked by the Low Voltage Directive 73/23/EEC (which you have to CE mark for after 1/1/97). Other than that, the only other reference to toxic fumes was "Fire Hazard - Miniminalization of toxic hazards - General" which is standard EN60695-7-1 (dor 1995), but it doesn't seem to be invoked by any Directive. Don't know that this helps, but you never know... Regards, -- - Alan Hudson EMC/EW Specialist Marconi Simulation (Scotland, UK) mailto:alan.hud...@gecm.com
Re: Taiwan EMC requirments.
Taiwan EMC requirements: Implementing date Product group Jan.01 ,1997 TV, VCR,FAX machine, copier July 01, 1997 Household appliances, ITE Jan. 01, 1998 Microwave Oven, Electric Tool, Telephone,and audio equipment July 01,1998 Any other equipment involve in EMC requirement No Immunity requirement at this time. EMI : ISM equipment : CISPR 11 : Class A @ 30 meter, Class B @10 meter Test setup : refer to ANSI C63.4 ITE : CISPR 22 : Class A @ 10 meter, Class B @ 3 meter ( this is not a typo). Test Setup: CISPR 22 or ANSI C63.4 TV broadcast receiver and associated equipment : CISPR 13 @ 3 meter Household equipment : CISPR 14 Lighting Device : CISPR 15. Tests have to be conducted by appointed lab in Taiwan. Test report has to be in Chinese. User's manual has to be in Chinese. Application Fee : NT$3,000.00 for each model Certificate Fee : NT$300.00 for each model Application Fee for series of model: NT$2,000.00 / each model ( above fee does not include the fee charged by appointed lab) Mike Kuo Compliance Consulting Services Sunnyvale Ca TEL(408)752-8166, FAX:(408)752-8168 __ Reply Separator _ Subject: Taiwan EMC requirements. Author: grasso%stkww...@ccsvm.stortek.com X-Resent-To: Multiple Recipients at internet-mail List-Post: emc-pstc@listserv.ieee.org Date:10/2/96 5:47 AM Question to the group... Does anyone know if & when ITE equipment will be comprehensively included or will the implmentation be done piece meal?? --( Forwarded letter 1 follows )- X-Router: (TAO/SMTP Gateway 1.1.34) Received: from stortek.com by CCSVM.STORTEK.COM (IBM VM SMTP V2R3) with TCP; Wed, 02 Oct 96 05:47:21 MDT Received: from ns-1.csn.net by stortek.com with SMTP id AA02287 (5.65c/IDA-1.4.4); Wed, 2 Oct 1996 05:48:52 -0600 Received: from ruebert.ieee.org by ns-1.csn.net with SMTP id AA11064 (5.65c/IDA-1.4.4); Wed, 2 Oct 1996 05:48:50 -0600 Received: (from daemon@localhost) by ruebert.ieee.org (8.7.5/8.7.3) id GAA28634 f or emc-pstc-list; Wed, 2 Oct 1996 06:56:21 -0400 (EDT) List-Post: emc-pstc@listserv.ieee.org Date: Wed, 02 Oct 96 11:19:04 EST From: "Mark Gandler" Message-Id: <9609028442.aa844284...@mail.stil.scitex.com> To: emc-p...@ieee.org Subject: Taiwan EMC requirments. Sender: owner-emc-p...@mail.ieee.org.smtp Precedence: bulk Reply-To: "Mark Gandler" X-Resent-To: Multiple Recipients X-Listname: emc-pstc X-List-Description: Product Safety Tech. Committee, EMC Society 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 There are some information about Taiwan Government requirements. Please be informed that Taiwan Government is going to implement the regulation of Electromagnetic Interference. The dates for implementing this regulation on respective products are as follows: Jan. 1st 1997 Copiers Jul. 1st 1997 Fax Jul. 1st 1997 Computer peripheral(including printer, plotter, scanner, ..) All the products above must be inspected by recognized lab. for acquiring the certification of importation approval. Should the product can not meet the requirement of Class B ITE, the importation of the product will be prohibited upon the implement of the EMI regulation. Does somebody know anymore about Taiwan regulation of EMI? Thanks, Mark Gandler EMC Engineer Scitex Corporation L.T.D Tel- 972-9-597240 Fax- 972-9-597900
Telecom Regulatory Test Equipment
Does anybody know of any companies that manufactures a good telecom test set (or parts of test sets) that are flexible enough to adapt to several countries regulations (especially Europeen}. I know this isn't strictly a EMC or PS issue but I figure most EMC and PS people live next door to telecom types so I'll give it a shot By the way is there a similar group for telecom folks? I can be reached by e-mail at kev...@ica.net or by mail at Digital Security Controls 1645 Flint Road Downsview, Ontario Canada M3J 2J6 or by phone at 416 665-8460 Ext 378 or by fax at 416 665-7498 Thanks Kevin Harris Manager, Compliance Engineering, D.S.C.
Re: Taiwan EMC requirments.
On Wed, 2 Oct 1996 grasso%stkww...@ccsvm.stortek.com wrote: > Question to the group... > > Does anyone know if & when ITE equipment will be comprehensively included or > will the implmentation be done piece meal?? I think it should read: > Jul. 1st 1997 Computer "and" peripheral(including printer, plotter, ^^^ ^^ > scanner, ..) > >
