RE: Symbols and Markings: Color scheme
A while back I attempted to compile a list of standards (etc) that generically address symbols /or markings. I omitted product-specific standards which may reference, modify or complement these. May not be up to date, please email me [directly] with any corrections if you wish and I can repost. Almost certainly not complete! -Glyn Please read the titles carefully: You will note that some of these standards are safety-related, others are for operational and other markings and signs. Also some are for equipment, and some for the facility. A. SYMBOLS/SIGNS/MARKING/SIGNALS, SAFETY: IEC, EU SEMI (stds w/SYMBOLS) These standards contain symbols: 92/58/EEC (EU Directive) MINIMUM REQUIREMENTS FOR THE PROVISION OF SAFETY AND/OR HEALTH SIGNS AT WORK EN 61310-1 SAFETY OF MACHINERY - INDICATION, MARKING AND ACTUATION - REQUIREMENTS FOR VISUAL, AUDITORY AND TACTILE SIGNALS Specifies requirements for visual, auditory and tactile methods of indicating safety-related information, at the man-machine interface and to exposed persons. Specifies a system of safety signs, colours, markings and other warnings, meant for use for the indication of hazardous situations, and health hazards and for meeting certain emergencies. [symbols for operation, prohibition, warning, mandatory, escape, fire fighting] EN 61310-2 -REQUIREMENTS FOR MARKING Gives general rules on marking for identification of machinery, for the avoidance of hazards arising from incorrect connections, and for safe use related to mechanical and electrical hazards. [symbols for: Ground(earth), ac, dc, +, -, class II, III, !, dangerous voltage] ISO 3864 (1984) SAFETY COLOUR AND SAFETY SIGNS ISO 7000 (1/11/1989) GRAPHICAL SYMBOLS FOR USE ON EQUIPMENT - INDEX AND SYNOPSIS Gives a summary of graphical symbols put on equipment and intended to instruct the user of the equipment in its use and operation. IEC 60417-1 EN 60417-1 GRAPHICAL SYMBOLS FOR USE ON EQUIPMENT - PART 1 - OVERVIEW AND APPLICATION Covers graphical symbols and their meaning (title and application). Mainly intended for identifying equipment or part of the equipment, designating connections, indicating functional states, providing instruction for operation of equipment and packaging information. Reference information is provided to assist the user in finding suitable graphic symbols. It is not intended for the purpose of reproduction and symbols defined are not intended primarily for public information, safety signs, and for use for drawings and in technical documentation of products. When using graphic symbols as safety signs the rules in ISO 3864 apply. IEC 60417-2 EN 60417-2 PART 2 - SYMBOL ORIGINALS Covers graphic symbols included in IEC 60417-1 for the purpose of reproduction. For application and modification rules for graphic symbols, and information which includes references, IEC 60416 should be referred to. B. SYMBOLS/SIGNS/MARKING/SIGNALS, SAFETY: IEC EU (no SYMBOLS) EN 842 SAFETY OF MACHINERY - VISUAL DANGER SIGNALS - GENERAL REQUIREMENTS, DESIGN AND TESTING Gives criteria for perception of visual danger signals in the area that perople are intended to perceive and react to such a signal. Gives the safety and ergonomic requirements and corresponding physical measurements. Not applicable to danger indications presented in either written or pictorial form or those transmitted by data display units. EN 981 (= ISO 11429) SAFETY OF MACHINERY - SYSTEM OF AUDITORY AND VISUAL DANGER AND INFORMATION SIGNALS | ISO 11429 ERGONOMICS - SYSTEM OF AUDITORY AND VISUAL DANGER AND INFORMATION SIGNALS Defines a system of danger and information signals, allowing for different degrees of urgency. Applies to all danger and information signals which have to be clearly perceived and differentiated as specified in ISO/TR 12100-2 [EN 292-2]. Does not apply to certain fields which are covered by specific standards or other conventions in force. EN 61310-3 -- REQUIREMENTS FOR THE LOCATION AND OPERATION OF ACTUATORS This part describes safety-related requirements for actuators, at the man-machine interface and is also applicable to non-electrotechnical technologies and also gives general requirements for actuators. It covers single actuators as well as groups of actuators forming part of an assembly. IEC 60416 2nd ED 1988 Superseded [= ISO 3461-1] ISO 3461-1 GENERAL PRINCIPLES FOR THE CREATION OF GRAPHICAL SYMBOLS - GRAPHICAL SYMBOLS FOR USE ON EQUIPMENT Specifies the basis for the creation of graphical symbols used on equipment. Gives rules for designing symbols, to include their shape and size, and instructions for their application. IEC 80416-1 (2001) BASIC PRINCIPLES FOR GRAPHICAL SYMBOLS FOR USE ON EQUIPMENT - PART 1: CREATION OF SYMBOL ORIGINALS Defines the key principles for the creation of symbol originals for use on equipment. Also contains rules for design such as shape and size, and also for preparation of the accompanying texts. EN 80416 Basic principles for
Re: Grounding of EUT in EN61000-4-6 conducted immunity test
snip: In the case where a CDN is installed on each line from the EUT, how are the signal line shields handled at the EUT - left unterminated, terminated to ground, or terminated to the metallic case? snip I am no expert on the specifics of EN61000-4-6. I like to think I have a good understanding of the physics of field-to-wire coupling. People reading that article I referred to may or may not agree with my self-assessment. With regard to the specific question above, I would assume, and I stress assume, that shield termination at the EUT would have to be production configuration. To me that is not the issue at all, but the real issue raised by the original question was grounding of the EUT chassis to the ground plane. That is what my paper talked about (in part). For those who are interested and do not have access to the symposium record, either hard copy or CD, I can send an electronic version in Word. Any recipient would have to swear not to reproduce it because it is copyrighted by the IEEE. Ken Javor From: Dan Kinney (A) dan.kin...@heapg.com Date: Fri, 14 Feb 2003 17:13:06 -0500 To: 'Ken Javor' ken.ja...@emccompliance.com, Dan Kinney (A)dan.kin...@heapg.com, Oliver Betz list...@gmx.net, emc-p...@majordomo.ieee.org Subject: RE: Grounding of EUT in EN61000-4-6 conducted immunity test Thanks for the quick response. Please let me explore this further. I have used the special case as the general case where the EUT has many signal lines in which it would be too costly and impractical to have a CDN on each line. The special case allows the test engineer the flexibility of disregarding the multiple impedances by way of the method described in the body of the document and amplified in Annex A. I will admit I somehow missed the point about the lower impedance requirement of the AE. In the case where a CDN is installed on each line from the EUT, how are the signal line shields handled at the EUT - left unterminated, terminated to ground, or terminated to the metallic case? EN61000-6-2 is the generic immunity standard we use. It states the functional earth port of the EUT will be tested using this basic standard. If the earth is to be lifted, how is this possible? I was not a member of this community in 1997 thus do not have a copy of the symposium record. Is it available on the IEEE site? Thanks again for your quick response. Dan Kinney -Original Message- From:Ken Javor [SMTP:ken.ja...@emccompliance.com] Sent:Friday, February 14, 2003 4:41 PM To:Dan Kinney (A); Oliver Betz; emc-p...@majordomo.ieee.org Subject:Re: Grounding of EUT in EN61000-4-6 conducted immunity test I was working off IEC 1000-4-6 (1996), Figures 2 and 5b, which cover direct injection and show the EUT isolated above ground. Figure 6 shows clamp injection and EUT isolation above ground. What you are referencing is a special case in the annex when the cm 150 Ohm impedance cannot be met. The theory is, I believe, as I stated before. Incidentally clamp injection is fundamentally different than CDN injection. CDN injects line-to-ground, and clamp injects in series with the cable. The standard specifically says that when using a clamp installed between EUT and AE, the AE must be an equal or lower impedance than the EUT. This is opposite of what you want with a CDN. My paper covers that issue in detail. It appeared in the 1997 IEEE EMC Symposium record, page 479. Ken Javor 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: best screw/washer choices for attaching PCB to Chassis?
I read in !emc-pstc that Price, Ed ed.pr...@cubic.com wrote (in b78135310217d511907c0090273f5190d0b...@curly.ds.cubic.com) about 'best screw/washer choices for attaching PCB to Chassis?' on Mon, 10 Feb 2003: Put a dab of Locktite into the female thread on the PEM before assembly. - provided you will junk the *whole product* if anything fails on the board. I've had Loctited screws hold until the head is a mangled mess or the PEM separates from its mounting surface. -- 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: North American Production-Line Tests; ANSI or Other
I'm sorry but I seem to have missed the purpose of this question. Is it to find the source document for the simple and purist reason of Knowledge? I most sincerely hope that you are forced into justify these essential tests. Gregg Having lost sight of our objectives we redoubled our efforts. 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
VDE701-1 vs 60990
I would like to know if there are significant differences between VDE701-1 and IEC60990 with regard to test circuits for measuring leakage currents and touch currents. Both IEC1010-1 and EN60950 both refer to test circuits which appear to be derived from 60990. Thank you, Ralph McDiarmid, AScT Regulatory Compliance Group Xantrex Technology Inc.
RE: North American Production-Line Tests; ANSI or Other
Going back a ways, UL 1459, ed. 3 Sections 72 and 73 along with Appendix C provide quite a lot of details regarding production line tests for telecom equipment. I have not been able to find a reference within UL 1459 which might indicate a deeper source of the requirements as reflected in 1459. My opinion and not that of my employer. Regards, Kaz Gawrzyjal kazimier_gawrzy...@dell.com From: Sam Davis [mailto:sda...@ptitest.com] Sent: Friday, February 14, 2003 10:03 AM To: emc-p...@majordomo.ieee.org Subject: RE: North American Production-Line Tests; ANSI or Other In searching UL 60950, don't look for production line tests, look for Routine Testing. Even then, the only routine testing I found in my very limited search was for routine hipot testing. Sam From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Jayasinghe, Ryan Sent: Thursday, February 13, 2003 6:26 PM To: 'Rich Nute'; pmerguerian2...@yahoo.com Cc: emc-p...@majordomo.ieee.org Subject: RE: North American Production-Line Tests; ANSI or Other Hello Rich, Good question. I tried tracking this down myself as I had to show my people where the Hi Pot and Bonding tests were required. You can't get from UL1950 to the production line tests. I know it's called out on the Factory Audit Manuals... but where does the requirement come from? What I got a hold of was a UL procedure for their Follow up Services personnel. But I hope you can use this document to further track down the source of the requirement. Try doing a search in Google for File E211188 Vol. 1 This is where I saw it. File E211188 Vol. 1 Issued: ( ) A P P E N D I X STANDARDIZED APPENDIX PAGES FOR: INFORMATION TECHNOLOGY EQUIPMENT INCLUDING ELECTRICAL BUSINESS EQUIPMENT (NWGQ, NWGQ7), POWER SUPPLIES FOR INFORMATION TECHNOLOGY EQUIPMENT INCLUDING ELECTRICAL BUSINESS EQUIPMENT (QQGQ, QQGQ7), TELEPHONE APPLIANCES AND EQUIPMENT (WYQQ, WYQQ7), POWER SUPPLIES FOR TELEPHONE APPLIANCES AND EQUIPMENT (QQJE, QQJE7) These appendix pages shall also be used for Components Recognized under the categories noted below when one or more descriptive Sections of the Follow-Up Service Procedure require that the manufacturer conduct the factory production-line tests described in Appendix D: (NWGQ2/QQGQ2/WYQQ2/QQJE2) (NWGQ8/QQGQ8/WYQQ8/QQJE8) Ryan Jazz JayasingheCanoga Perkins (www.canoga.com http://www.canoga.com ) Compliance Engineer 20600 Prairie Street Direct: (818) 678-3898 or x1198 Chatsworth, CA 91311-6008 Main:(818) 718-6300 e-mail: r...@canoga.com mailto:r...@canoga.com FAX:(818) 678-3798 From: Rich Nute [mailto:ri...@sdd.hp.com] Sent: Thursday, February 13, 2003 2:52 PM To: pmerguerian2...@yahoo.com Cc: emc-p...@majordomo.ieee.org Subject:Re: North American Production-Line Tests; ANSI or Other Hi Peter: Anyone knows of ANSI or other North American production-line test procedures/requirements for electrical/electronic equipment? Some UL and CSA standards specify the procedures for roduction-line tests, but what I am looking for is the source of these procedures/requirements. I don't believe any North American standard specifies production-line tests. For UL, production-line tests are specified in the front of each Volume of the UL Follow-Up Services (FUS) procedure. For CSA, I believe production-line tests are specified in the product report. Best regards, Rich This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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
RE: North American Production-Line Tests; ANSI or Other
Sir For some time, both UL and TUV have required my employer to test with a 25A to 40A current, depending on the branch circuit rating that the device can be connected to (as specified in the Conditions of Acceptability). Also, CSA has (at least for as long as I have been employed here) always required Ground Continuity tests (both Production and Type tests) to be performed at at least 30A for 950, 1010, and 601 devices. R/S, Brian -Original Message- From: peter merguerian [ mailto:pmerguerian2...@yahoo.com] Sent: Thursday, February 13, 2003 4:17 PM To: Rich Nute Cc: emc-p...@majordomo.ieee.org Subject: Re: North American Production-Line Tests; ANSI or Other Rich, I am trying to find the rationale why production-line ratyhing tests in North America are usually done with a simple ohmmeter and without passing a current of say 25 A through the circuit. There must be some rationale of doing it this way somewhere.
Re: Looking for Tables of Metric Wire Sizes
Good Morning John, Visit the Safety Link www.safetylink.com and search (Control-F) on the term ILSCO Wire Gauge Comparison Charts - Lots of good info there. While at the Safety Link also search (Control-F) on the term wire charts for resources provided by Alpha Wire. Regards, Art Michael Int'l Product Safety News A.E. Michael, Editor P.O. Box 1561 INT Middletown CT 06457-8061 U.S.A. Phone : (860) 344-1651 Fax: (860) 346-9066 Email : i...@safetylink.com Website: http://www.safetylink.com ISSN : 1040-7529 On Fri, 14 Feb 2003, John Barnes wrote: EMC-PSTC'ers, Where can I find a table(s) or list(s) of the preferred wire sizes (electrical and otherwise) used in Europe, Japan, and other countries on the metric system? I'm looking for: * Names/numbers of standards. * URL's for wire-manufacturer's websites. * URL's for distributors' catalogs. * URL's for web pages on the subject. * URL's for linecord manufacturer's web pages. OR * Anything of the sort that may lead me to this information. Or can you tell me from your own experience which of the following (or other?) gages are currently used outside the US? I've gone through manufacturer's catalogs, searched the Internet, and looked through some 15 bookcases of electronics and metal-working books in my personal collection without finding a definitive answer as to which metric wire gages are currently used worldwide. I am working on the ampacity (current-carrying capacity) appendix to my new book, Robust Electronic Design Reference, which I am writing for Kluwer. I also plan to put the wire gage information on dBi's web site, to make it readily available so that I can get comments and corrections via the Internet. In the US we use American Wire Gage (AWG, also called Brown Sharp Gage, BS) and even gages for the most part, which correspond to a roughly 20% reduction in diameter for each step. So far I have found tables that specify metric cross-sectional area in: * Hitachi Electronic Wires and Cables catalog, 1991-- page 278 lists JIS sizes for 0.035, 0.05, 0.1, 0.14, 0.18. 0.2, 0.3, 0.5, 0.75, 1.25, 2, 3.5, 5.5, 8, 14, 22, 38, 60, and 100 mm^2. * Oleflex Cable Advanced Cable Technology catalog, 1984/1985-- page 54 lists European Cable Stranding for 0.14, 0.25, 0.34, 0.38, 0.5, 0.75, 1.0, 1.5, 2.5, 4, 6, 10, 16, 25, 35, 50, 70, 95, 120, 150, 185, 240, 300, 400, and 500 mm^2. * IEC 950, 1996-- Table 11 lists sizes of conductors for power supply cords of 0.75, 1.00, 1.25, 1.5, 2.5, 4, 6, 10, 16, 25, 35, and 50 mm^2. I have found tables that specify metric diameters for solid wires: * Querschnitt und Gewicht von Runddrahten aus Kupfer, date unknown-- page unknown lists Durchmesser (diameters) of 0.04, 0.05, 0.56, 0.06, 0.063, 0.07, 0.08, 0.09, 0.1, 0.112, 0.118, 0.125, 0.132, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.2, 0.224, 0.236, 0.25, 0.265, 0.28, 0.3, 0.315, 0.335, 0.355, 0.38, 0.4, 0.425, 0.45, 0.475, 0.5, 0.53, 0.56, 0.6, 0.63, 0.65, 0.71, 0.75, 0.8, 0.85, 0.9, 0.95, 1, 1.06, 1.12, 1.18, 1.25, 1.32, 1.4, 1.5, 1.6, 1.8, 2, 2.5, 2.65, and 3 mm. * Metric wire gage-- gages 0.5 to 100 corresponding to diameters of 0.050mm to 10.0mm. * German Wire Gage (GWG)-- gages 1 through 25 corresponding to diameters of 5.5mm to 0.438mm. I've also found tables based on diameters in inches: * British Standard Wire Gage (SWG), also called New British Standard (NBS), English Legal Standard, and Imperial Wire Gage. * Birmingham Wire Gage (BWG), also called Stub's Iron Wire Gage. * London Gage, also called the Old English Wire Gage. * Twist Drill Gage. * Stubs Steel Wire Gage. * Steel Wire Gage (Stl.W.G.), also called Washburn Moen (WM), Roebling steel wire gage, or American Steel Wire Co.'s gage. * Steel music wire gage. * Music wire gage. But some of my sources go back to the 1940's, so I don't know how far I can trust them... Thanks! John Barnes KS4GL, PE, NCE, ESDC Eng, SM IEEE dBi Corporation http://www.dbicorporation.com/ (859)253-1178 phone (859)252-6128 fax --- 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:
Looking for Tables of Metric Wire Sizes
EMC-PSTC'ers, Where can I find a table(s) or list(s) of the preferred wire sizes (electrical and otherwise) used in Europe, Japan, and other countries on the metric system? I'm looking for: * Names/numbers of standards. * URL's for wire-manufacturer's websites. * URL's for distributors' catalogs. * URL's for web pages on the subject. * URL's for linecord manufacturer's web pages. OR * Anything of the sort that may lead me to this information. Or can you tell me from your own experience which of the following (or other?) gages are currently used outside the US? I've gone through manufacturer's catalogs, searched the Internet, and looked through some 15 bookcases of electronics and metal-working books in my personal collection without finding a definitive answer as to which metric wire gages are currently used worldwide. I am working on the ampacity (current-carrying capacity) appendix to my new book, Robust Electronic Design Reference, which I am writing for Kluwer. I also plan to put the wire gage information on dBi's web site, to make it readily available so that I can get comments and corrections via the Internet. In the US we use American Wire Gage (AWG, also called Brown Sharp Gage, BS) and even gages for the most part, which correspond to a roughly 20% reduction in diameter for each step. So far I have found tables that specify metric cross-sectional area in: * Hitachi Electronic Wires and Cables catalog, 1991-- page 278 lists JIS sizes for 0.035, 0.05, 0.1, 0.14, 0.18. 0.2, 0.3, 0.5, 0.75, 1.25, 2, 3.5, 5.5, 8, 14, 22, 38, 60, and 100 mm^2. * Oleflex Cable Advanced Cable Technology catalog, 1984/1985-- page 54 lists European Cable Stranding for 0.14, 0.25, 0.34, 0.38, 0.5, 0.75, 1.0, 1.5, 2.5, 4, 6, 10, 16, 25, 35, 50, 70, 95, 120, 150, 185, 240, 300, 400, and 500 mm^2. * IEC 950, 1996-- Table 11 lists sizes of conductors for power supply cords of 0.75, 1.00, 1.25, 1.5, 2.5, 4, 6, 10, 16, 25, 35, and 50 mm^2. I have found tables that specify metric diameters for solid wires: * Querschnitt und Gewicht von Runddrahten aus Kupfer, date unknown-- page unknown lists Durchmesser (diameters) of 0.04, 0.05, 0.56, 0.06, 0.063, 0.07, 0.08, 0.09, 0.1, 0.112, 0.118, 0.125, 0.132, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.2, 0.224, 0.236, 0.25, 0.265, 0.28, 0.3, 0.315, 0.335, 0.355, 0.38, 0.4, 0.425, 0.45, 0.475, 0.5, 0.53, 0.56, 0.6, 0.63, 0.65, 0.71, 0.75, 0.8, 0.85, 0.9, 0.95, 1, 1.06, 1.12, 1.18, 1.25, 1.32, 1.4, 1.5, 1.6, 1.8, 2, 2.5, 2.65, and 3 mm. * Metric wire gage-- gages 0.5 to 100 corresponding to diameters of 0.050mm to 10.0mm. * German Wire Gage (GWG)-- gages 1 through 25 corresponding to diameters of 5.5mm to 0.438mm. I've also found tables based on diameters in inches: * British Standard Wire Gage (SWG), also called New British Standard (NBS), English Legal Standard, and Imperial Wire Gage. * Birmingham Wire Gage (BWG), also called Stub's Iron Wire Gage. * London Gage, also called the Old English Wire Gage. * Twist Drill Gage. * Stubs Steel Wire Gage. * Steel Wire Gage (Stl.W.G.), also called Washburn Moen (WM), Roebling steel wire gage, or American Steel Wire Co.'s gage. * Steel music wire gage. * Music wire gage. But some of my sources go back to the 1940's, so I don't know how far I can trust them... Thanks! John Barnes KS4GL, PE, NCE, ESDC Eng, SM IEEE dBi Corporation http://www.dbicorporation.com/ (859)253-1178 phone (859)252-6128 fax 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: OATS building
Hi Folks, I am looking for the best, but low cost, building material to cover a 6M X 8M OATS site. Some years ago I used a test house who had purchased a facility made by a conservatory manufacturer. Made from good quality plastic (UPVC?) panels and plastic windows they had also arranged for ALL fixings to be plastic, even the hinges. Built over a turntable facility with underground pipe (water) to feed power and signals, it worked well. Regards Neil Helsby ** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.mimesweeper.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
Tests for a product powered through the signal cable.
Dear all:
Can anyone kindly let me know how to decide what tests should be performed
for a DC module/product powered by USB port or PS2 port per EMC directive.
My thoughts are listed below:
EN55022 (Conducted Emission--yes; Radiated Emission--yes)
EN 55024
Table 1 --IEC 61000-4-6--yes, IEC 61000-4-3--yes, IEC 61000-4-2--yes
Table 2 (only for apply to the cable)--IEC 61000-4-6--yes, IEC61000-4-5--yes,
IEC 61000-4-4--yes
Table 3-no
Table4-no
I am not sure whether my decesions are right or wrong.
Thanks for your responses in advance!!
Yu-Lung Chen
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