RE: US Modem Safety
Alex, It won't pass the UL (or CSA) overvoltage testing. You need the 600V part for that. Dan From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Alex McNeil Sent: Monday, December 01, 2003 6:00 AM To: emc-p...@majordomo.ieee.org Subject: US Modem Safety Hi Colleagues, I intend to use an overcurrent protection device, the Raychem polyswitch TS250-130, on an analogue modem interface for Europe and the US. I know this should be OK for Europe but is the 250V rating (ITU lightning protection to 1.5KV) OK for the US? Kind Regards Alex McNeil Principal Engineer This email has been scanned for all known viruses and appropriate content by the Messagelabs mail service. This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ 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: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org 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.ieee-pses.org/ 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: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
IEEE Product Safety Engineering Society
The Product Safety Engineering Society's web site has been updated with some news items pertaining to the new society as well as a convenient applet to log you into the IEEE Communities site to access EMC-PSTC archives (use the EMC-PSTC Email Forum link in the sidebar). Visit the PSES web site at www.ieee-pses.org. This new Society includes the theory, design, development and implementation of product safety engineering related to the process required for ensuring that electromechanical products are safe for use within a wide-range of environments. Dissemination of technical information to enhance personal product safety engineering skills is a primary focus of the Society. The IEEE Product Safety Engineering Society plans to work closely with various IEEE Societies and Councils that also include product safety engineering as a technical specialty. The new society already has local groups in several cities that will be formed into chapters, and others will be started as demand dictates. Membership benefits will include a virtual community for society members. The society ID for your renewal or application forms is 043-0431 and the yearly fee is US$35. Renew online at www.ieee.org/renewal. Join the IEEE at http://www.ieee.org/services/join/. Customize your membership at www.ieee.org/addnewservices. Thank you! PSES Steering Committee This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ 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: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: Grounding
Ned, You are right, I could not find anything in recent ITE standards specifically stating that hinges are not allowed. Older standards like UL1459 did specifically state that bearings and hinges can not be used. I believe however that the onus would be on the manufacturer to prove that the hinge was a reliable bonding conductor and met all the requirements of such. That could be costly to prove by life testing hinges and running the bonding tests. Dan Roman dan.ro...@ieee.org From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Ned Devine Sent: Friday, November 14, 2003 10:29 AM To: IEEE EMC/Product Safety (IEEE, EMC/Product Safety) Subject: Grounding Hi, I need some help. I told someone that you can not depend on mechanical contact only (i.e. in this case a door hinge) for protective earth. Even if it passes the test, it would still not be acceptable because it does not meet the construction requirements. He then asked me to show him were it said that in the standard (IEC 60950-1 or IEC 60601-1). I looked and could not find it. Am I just missing it, or is it not in the standards? There is a reference in CSA standards to C22.2 No. 0.4 that has the requirement, but I can not find a similar reference in UL or IEC standards. Ned Devine Program Manager III Entela, Inc. 3033 Madison Ave. SE Grand Rapids, MI 49548 Phone: 616 248 9671 Fax: 616 574 9752 e-mail: ndev...@entela.com www.entela.com 1-800-888-3787 Web: www.entela.com Grand Rapids * Detroit * Boston * Toronto * Taipei This message is confidential and intended only for the individual to whom or entity to which it is addressed. If you are not the intended recipient or addressee, or an employee or agent responsible for delivering this message to the addressee, you are hereby notified that any dissemination, distribution, or copying, in whole or part, of this message is strictly prohibited. If you believe that you have been sent this message in error, please do not read it. Please immediately reply to sender that you have received this message in error. Then permanently delete all copies of the message. Thank you. 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: emc_p...@symbol.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: emc_p...@symbol.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
IEEE Product Safety Engineering Society
All renewing IEEE members and those considering membership in the IEEE who have an interest in Product Safety have a new society to consider, the Product Safety Engineering Society (PSES). Visit the PSES web site at www.ieee-pses.org. This new Society includes the theory, design, development and implementation of product safety engineering related to the process required for ensuring that electromechanical products are safe for use within a wide-range of environments. Dissemination of technical information to enhance personal product safety engineering skills is a primary focus of the Society. The IEEE Product Safety Engineering Society plans to work closely with various IEEE Societies and Councils that also include product safety engineering as a technical specialty. The new society already has local groups in several cities that will be formed into chapters, and others will be started as demand dictates. Membership benefits will include a virtual community for society members. The society ID for your renewal or application forms is 043-0431 and the yearly fee is US$35. Renew online at www.ieee.org/renewal. Join the IEEE at http://www.ieee.org/services/join/. Customize your membership at www.ieee.org/addnewservices. Thank you! PSES Steering Committee 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: emc_p...@symbol.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: PSTN + Signal Cable
Alex, Assuming your talking about 60950 and the signal lines are SELV you only need basic insulation, not reinforced, between TNV-3 and SELV. Distance through insulation does not come into play, just the dielectric test and voltage rating of the wire in this case. Dan Roman dan.ro...@ieee.org From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Alex McNeil Sent: Thursday, September 18, 2003 3:04 AM To: emc-p...@majordomo.ieee.org Subject: PSTN + Signal Cable Hi Colleagues, Does anyone foresee a problem if I route the PSTN and Signal wires within the same cable? I am thinking of a particular application where the above scenario would fit well in my design. I ensure that the 1.6mm (and 2.0mm for re-inforced insulation) spacing requirement is met on the PCB connector and PCB tracking. The only problem I see is the cable insulation does not meet the 0.4mm thru insulation requirement but the manufacturer will test the cable for 1500Vrms dielectric strength between the PSTN wires and the Signal wires, 100% of production and produce a CoC. Or must I specify that the wire insulation meet the 0.4mm thru insulation requirement? Thanks in advance of your replies. Kind Regards Alex McNeil This email has been scanned for all viruses by the MessageLabs Email Security System.
Japanese J1
Hello list, Does anyone know if there is a difference between what some call J1 for Japan and ISDN running on T1 lines (e.g. NTT ISDN) in Japan? Is J1 used to refer to a non-ISDN line or T1 leased line? What's the typical J1 application? Are both covered by the Green Book? I looked around on the JATE web site but didn't have any luck. Thanks in advance, Dan Roman dan.ro...@ieee.org 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: PCBA Inspection Stamps
Doug, You could attach a process tag that goes with the board and have the inspectors and testers stamp that instead. I'm sure you could make your manufacturing processes accommodate the change and still maintain traceability. The product at the customer's site does not need the stamps on the PCB, you just need to maintain traceability during your manufacturing process. Just one low-tech option I'm sure. Dan -Original Message- From: POWELL, DOUG [mailto:doug.pow...@aei.com] Sent: Friday, December 06, 2002 6:03 PM To: EMC-PSTC (E-mail) Subject: PCBA Inspection Stamps Hello group, I have a request for information on stamping methods of PCBAs. I would normally post this question on one of the discussion forums for PCB design, but this question really does pertain to product safety. But first, please indulge me while I provide a little background information... My company uses a very large number of PCB assemblies with wide variety of technologies. Many of these boards have safety considerations and receive routine hipot testing during manufacture. As is normally the case, in-house and outsource assembly of the boards requires various kinds of inspection and test with stamps for validation. Traditionally these are rubber stamps or some form of an adhesive label with printing. Many of our boards have high voltage separation from SELV circuits and as it turns out the most convenient place to put a stamp is in a safety keepout zone. There have been a number of hipot failures that track right through this stamp. In our standard practices manual, we specify the use of only white epoxy based inks, but some of these are conductive as well. In addition, with the ever shrinking geometries of high density boards, placing a nonconductive stamp on a low voltage circuit interferes by insulating test points for bed of nails testing. Since inspection marks are usually placed by hand, the faults we see are fairly random. So, on the one hand conductive inks are bad and on the other hand nonconductive inks are bad. In an effort to solve this problem, we've considered providing a silk-screened area of the board that is safe to stamp, but real estate is now at a premium and solder-side silk costs on average about 10% more. Plus, it won't be long until computerized component ID and location eliminates the need for silk-screen entirely. My question is this: Has anyone discovered a technology or process of any sort, for marking of ultra-high density or high voltage PCBAs and is easy to implement in most board houses? I have to think that with all the technological advances the old rubber stamp or adhesive label could be replaced somehow. Who knows, maybe some form of UV identification? I am very interested to hear any success stories that you may have. Best regards to all, -doug Douglas E. Powell Compliance Engineer Advanced Energy Industries, Inc. Fort Collins, CO 80535 USA ___ This message, including any attachments, may contain information that is confidential and proprietary information of Advanced Energy Industries, Inc. The dissemination, distribution, use or copying of this message or any of its attachments is strictly prohibited without the express written consent of Advanced Energy Industries, Inc. --- 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: docopocoss
Yes, with apparently only one user of this word on the face of the planet! :-) TLAs are bad enough, 10LAs I can't handle (guess that would be a TLA as well). Dan -Original Message- From: Rich Nute [mailto:ri...@sdd.hp.com] Sent: Tuesday, November 05, 2002 12:44 PM To: j...@jmwa.demon.co.uk Cc: emc-p...@majordomo.ieee.org Subject: docopocoss docopocoss This word was unknown to me. I checked an American dictionary and could not find it. Then, I called up the Google search engine and entered the word, hoping to find an English dictionary. Google immediately came back with the definition. 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: DSL Modems
All, When Verizon installed my ADSL service a couple years back they put in what they called a whole house filter, but it is actually a splitter/filter. I don't recall any Listing marks of any kind on the device. It was installed on the network side of the gray box on the side of my house, not on the customer premise side so Listing may not apply. I took the device with me when I moved but DSL was not available in my new location. It is potted so I have no hope of determining the construction, guess I could apply ring voltage to it in the lab and hi-pot it and see what happens! I suspect though that it is TNV-3 in and TNV-3 out. Shortly after my DSL was installed (I was one of the first in my area) they stopped installing the whole house splitter and required the user to put a filter on every phone (yuk) except for the DSL modem. So even if splitters are available that do a TNV-3 to TNV-1 or even TNV-3 to SELV connection, at least in the Verizon NJ customer area DSL modems are TNV-3 all the time. Dan -Original Message- From: Peter Merguerian [mailto:pmerguer...@itl.co.il] Sent: Wednesday, September 18, 2002 9:24 AM To: 'Rob Keller'; emc-p...@majordomo.ieee.org Subject: RE: DSL Modems Rob Hi! I assume that the ADSL modem is connected to the phone line through an external splitter. If you find an approved splitter having the required TNV-3 to TNV-1 insulation, and you specify the specific splitter in your manual, I gather that your interface can be TNV-1. If no such splitter is specified, then the interface should be classified TNV-3. Now a question to the group - is anyone familiar with external Listed/Certified splitters that have the TNV-3 - TNV-1 insulation? This e-mail message may contain privileged or confidential information. If you are not the intended recipient, you may not disclose, use, disseminate, distribute, copy or rely upon this message or attachment in any way. If you received this e-mail message in error, please return by forwarding the message and its attachments to the sender. PETER S. MERGUERIAN Technical Director I.T.L. (Product Testing) Ltd. 26 Hacharoshet St., POB 211 Or Yehuda 60251, Israel Tel: + 972-(0)3-5339022 Fax: + 972-(0)3-5339019 Mobile: + 972-(0)54-838175 http://www.itl.co.il http://www.i-spec.com -Original Message- From: Rob Keller [mailto:r...@cclab.com] Sent: Tuesday, September 17, 2002 10:38 PM To: emc-p...@majordomo.ieee.org Subject: DSL Modems Greetings all, Question regarding the classification of DSL modems. DSL modems connect to the standard telecom network yet they do not require a ring signal or go on/off hook, therefore the classification would be TNV-1. Yet there are ring signals still present on the telecom lines for the the other equipment. So, because of the ring signals, which would exceed the limits of SELV, connecting to the input the modem, should the classification be TNV-3. Any insight would be greatly appreciated. Rob Keller Product Safety Engineer Communication Certification Laboratory r...@cclab.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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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:
RE: thermocouple welder
Brian, I use a Hot Spot welder from DCC Corp. Works quite well and even comes with green tinted safety glasses (as suggested by an earlier poster). Here is a link to a description of it, I think they give company contact info as well: http://www.thomasregister.com/olc/dcc/hot2.htm Dan -Original Message- From: Brian McAuliffe [mailto:i...@mcac.ie] Sent: Tuesday, September 17, 2002 11:14 AM To: Emc-Pstc Post Subject: thermocouple welder any recommendations for a fine-wire thermocouple tip welder ? Brian Brian McAuliffe MCA Compliance Solutions Ltd Unit 2 Lissane Business Park|Clarecastle|Co.Clare|Ireland w: www.mcac.ie e: i...@mcac.ie t: +353 (0)65 6823452 m: +353 (0)87 2352554 --- 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
NEBS - Bonding and Grounding
NEBS Gurus, Do the 1089 bonding and grounding DC short circuit tests apply down to the component level in a system or are they limited to the power supply or some other demarcation point? If it applies anywhere in the system it seems to me that you'd never finish testing. You'd have to test the power supply, backplane, mother board, daughter cards, IC dies...sort of like doing the UL 15W test for home entertainment equipment. Reading through section 9 and specifically 9.8 it seems they are keying on the power supplied directly from the CBN and not that power indirectly derived from the CBN after DC to DC converters. Where is the demarcation point if there is one? Do labs that test to NEBS handle this consistently? Thanks in advance. Dan Roman Compliance Engineer Intel --- 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: FCC Gives TV Makers Deadline
I guess these sets are essentially computers with an RF input so why not Class B? Throw in TiVo (sp?) and they're even have hard drives. If the FCC wants to speed deployment have them force my cable company to carry HDTV signals! Dan -Original Message- From: Gary McInturff [mailto:gary.mcintu...@worldwidepackets.com] Sent: Thursday, August 08, 2002 10:20 AM To: Wani, Vijay (V); emc-p...@majordomo.ieee.org Subject: RE: FCC Gives TV Makers Deadline Well, it fits the definition of 15.3 (k) Digital devices, and unless you can call it an appliance I don't see an allowance in the 15.103 Exemptions, that would exclude it from the regulations. Gary -Original Message- From: Wani, Vijay (V) [mailto:vw...@dow.com] Sent: Thursday, August 08, 2002 5:29 AM To: 'emc-p...@majordomo.ieee.org' Subject: FCC Gives TV Makers Deadline Group: there was an article on wall-street journal about government's significant attempts to speed the nation's changeover to digital television. does this mean, digital TV has to comply with FCC Class B? thank you in advance. vijay wani http://www.fcc.gov/headlines.html --- 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: creepage v breakdown voltage
I was looking into this a few weeks ago also and found similar results experimentally as other posters have mentioned. The only voltage per inch spec I was able to come up with was in the IPC specs but they were way out of whack! 0.12 mils per volt or more meaning that 2121 Vdc distance that the safety standards say should be 2.5 mm the IPC spec is saying you need 5 mm While the safety standards may be conservative to allow for temperature, grease, dirt, etc. over time the IPC specs are ultra-conservative. The dielectric tables for hermetically sealed material group III is probably closer to the actual breakdown but I never did find a spec I could use to predict the ACTUAL breakdown voltage of a gap between traces. If anyone finds a rule of thumb or equation I'd like to have it also. Dan -Original Message- From: MCA Compliance [mailto:bally...@iolfree.ie] Sent: Friday, March 15, 2002 4:54 AM To: Emc-Pstc Post Subject: creepage v breakdown voltage does data exist which correlates creepage distance on a pcb with hi-potential test voltage it should withstand ? for example, I know 60950 sugests a test voltage of 1500Vrms for 1 minute and a creepage of 2.5mm (material group III) for basic insulation. How did they arrive at 2.5 mm ??? Brian email: i...@mcac.ie --- 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...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: Voltage Spikes on Power Lines etc
George, The ACTA for Part 68 has issued an advisory for Customer Information documentation for Part 68 devices. It suggests a warning be included suggesting the use of an AC surge arrestor. This is on page 7 of 8 of a PDF file downloadable from http://www.part68.org/. It claims that telephone companies have reported that electrical surges are very destructive to customer telephone equipment connected to AC power sources. It also states that This has been identified as a major nationwide problem. A source for this information is not provided, but perhaps somewhere on the web site you might find a contact that could point you to hard data. Dan -Original Message- From: George Stults [mailto:george.stu...@watchguard.com] Sent: Thursday, March 14, 2002 12:17 PM To: emc-p...@majordomo.ieee.org Subject: Voltage Spikes on Power Lines etc Hi Folks, I am trying right now to convince some folks that power line voltage spike problems can be and usually are severe enough to degrade or kill ITE products that don't have adequate over-voltage protection. I found a link using Google that describes the problems [ http://www.kalglo.com/powrline.htm ] but I'm looking for additional links to specifics or summaries if any one knows of such. Thanks in advance. George S. --- 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...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: CE - the abbreviation
Thanks, makes sense, but they do not mention what CB stands for even once on their web site, at least no place that I could find. Dan -Original Message- From: geor...@lexmark.com [mailto:geor...@lexmark.com] Sent: Tuesday, February 12, 2002 10:15 AM To: Roman, Dan Subject: RE: CE - the abbreviation CB = Certification Bodies See www.cbscheme.org for excellent info on CB Scheme. --- 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...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: CE - the abbreviation
My understanding also but here is one I've never figured out, what does CB stand for in the CB Scheme of things? Dan -Original Message- From: Alan E Hutley [mailto:nutwoo...@nutwood.eu.com] Sent: Tuesday, February 12, 2002 3:37 AM To: am...@westin-emission.no; emc-p...@majordomo.ieee.org Subject: Re: CE - the abbreviation Hi Amund I have always understood it to mean Conformite Europeenne. And that it indicates that the manufacturer has satisfied all assessment procedures specified by law for its product. It is not of course a quality mark. Alan E Hutley www.compliance-club.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...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: skinny power cords.
I agreed completely with Scott. A 6 to 9 foot 18AWG cord will handle well in excess of 20A for a short period of time without starting to smoke (heck, it'll handle close to in excess of 60A for a very very short time without bursting into flames--not that it was a good experience finding this out). Point is, the cordage will handle a fault either indefinitely or long enough for the branch circuit breaker to trip provided you are connected to a 15A or 20A branch circuit. Another data point, you routinely pass more current through the cord when doing the earthing test and that uses more current than the cord is rated. Leave the tester on for awhile and the cord does not really heat up either. What this list needs is a power cord manufacturer or agency safety engineer that does power cords to settle this once and for all! Dan -Original Message- From: Scott Lacey [mailto:sco...@world.std.com] Sent: Wednesday, October 24, 2001 7:43 PM To: Gary McInturff Cc: emc-p...@majordomo.ieee.org Subject: RE: skinny power cords. Gary, I believe the answer is that the power cord rating of 6 or 10 amps is the operating current, at which it will have minimum temperature rise. Under fault conditions it will experience a rather dramatic temperature rise that is still well below the melting temperature of the insulation. The breaker or fuse should clear well before the cord is cooked to the point of failure. Scott Lacey --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Light Emission from Professional Photography Flashes
If there aren't standards there probably should be. I remember seeing a NOVA episode in which Dr. Harold Edgerton, inventor of the strobe, demonstrated a strobe similar to that used during WWII to photograph German positions from the air at night. He fired the strobe at a newspaper 3 feet away and it instantly burst into flames! Makes the little green dot in front of your eye seem pretty trivial. Dan -Original Message- From: Peter Merguerian [mailto:pmerguer...@itl.co.il] Sent: Friday, October 19, 2001 11:46 AM To: EMC-PSTC (E-mail) Subject: Light Emission from Professional Photography Flashes Dear All, Any limitations/requirements for amount of light emitted from professional photography flashes? Any UL, IEC or European standards which specify limitations? I know how many you like being photographed - but imagine what harm one of these flashes can cause to your eyes! This e-mail message may contain privileged or confidential information. If you are not the intended recipient, you may not disclose, use, disseminate, distribute, copy or rely upon this message or attachment in any way. If you received this e-mail message in error, please return by forwarding the message and its attachments to the sender. PETER S. MERGUERIAN Technical Director I.T.L. (Product Testing) Ltd. 26 Hacharoshet St., POB 211 Or Yehuda 60251, Israel Tel: + 972-(0)3-5339022 Fax: + 972-(0)3-5339019 Mobile: + 972-(0)54-838175 --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: board scanning on the cheap (sort of)
Brent, You'd find a paper titled Constructing the Lagrangian of VLSI Devices from Near Field Measurements of the Electric and Magnetic Fields on page 129 of the IEEE 2000 Symposium record volume one very interesting. It lists some results using just such a measuring device. A description I believe of the contraption itself can be found in the IEEE 1999 EMC Symposium record titled Measuring the Electric and Magnetic Near fields in VLSI Devices. Dan -Original Message- From: brent.dew...@us.datex-ohmeda.com [mailto:brent.dew...@us.datex-ohmeda.com] Sent: Wednesday, August 08, 2001 4:03 PM To: emc-p...@majordomo.ieee.org Subject: board scanning on the cheap (sort of) With all this talk about visualization, I thought I'd toss in my bit. Here at Datex-Ohmeda we have a small NC mill sometimes used by the RD group to make small prototype parts, but it often sits idle. Since I have a spectrum analyzer and a variety of small dimension H and E field probes I've built, I thought it would be interesting to build the equivalent of an EMScan. The control program is being written in LabVIEW and is coming along pretty well. One nice thing about the mill is that I can program the scan height for any rectangle I define, so tall components can be hopped over. When it's all done, I should be able to play a frequency swept movie of the board on an intensity graph. The cheaper way to do this would be to find an older X-Y plotter and skip the height variation. If I ever get the beast done, it will be open source to LabVIEW users. Best regards, Brent DeWitt Datex-Ohmeda Louisville, CO --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on Virtual Conference Hall, --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on Virtual Conference Hall,
RE: EMI sniffer goggles
In a past job (10 years ago) another compliance engineer and myself were discussing how nice it would be to have EMI sunglasses while working on fixing a particularly noisy and troublesome piece of equipment. The idea was inspired by the X-ray glasses sold on the back cover of comic books. Might be a good ad to take out in the April issue of Compliance Engineering or Conformity magazines! Dan -Original Message- From: Wan Juang Foo [mailto:f...@np.edu.sg] Sent: Tuesday, August 07, 2001 9:28 PM To: EMC-PSTC Discussion Group Subject: Re: EMI sniffer goggles I suppose that can be achieve with some class of liquid crystals embedded in a polymer medium. The problem is that is the representation in the near field or just a plane (cross section). I will prefer a none intrusive gas or vapour that will 'glow' at different field intensity and colour, very much like a corona or aurora. :-) Now we can have a glass tank 'gas chamber' within an anechoic chamber to evaluate the field strengths in 3D. Then the argument will be that there will be different gasses for different frequent frequency ranges ;-) Just think about the possible effect on the environment. Dreams comes true when we want them to... Tim Foo, (or just call me 'Tim') E-mail: f...@np.edu.sg ECE, School of Engineering, http://www.np.edu.sg/ece/ Tel: + 65 460 6143 Ngee Ann Polytechnic, Fax: + 65 467 1730 535 Clementi Road, Singapore 599489 Doug McKean dmck...@corp.auspex.coTo: EMC-PSTC Discussion Group emc-p...@majordomo.ieee.org m cc: (bcc: Wan Juang Foo/ece/staff/npnet) Sent by: Subject: Re: EMI sniffer goggles owner-emc-pstc@majordom o.ieee.org 08/08/01 05:18 AM Please respond to Doug McKean Okay, here's what I'd like to have ... Translucent material which is color responsive to emi. Similar to the material on the side of batteries which responds to voltage levels. A pane of translucent material which can be put on the end of a stick much like a pane of glass or a pane of of it which could be stood from a floor support next to the product and show a pattern of emi strengths by color. Or, a thin sheet of it much like plastic wrap which can be placed on a part of a product (such as a surface or edge) which would also respond to field strength. snip --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on Virtual Conference Hall, --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on Virtual Conference Hall,
RE: How Safe ???
Is that McDonald's below sea level? Just wondering how far over 212F/100C they could get the water to go! Anything over around 150F is scalding isn't it? Anything under 150F and coffee drinkers would complain the coffee is cold. Let's sue the coffee producers for coming up with a product that can only be enjoyed when it is dangerous to klutzes. Dan -Original Message- From: Price, Ed [mailto:ed.pr...@cubic.com] Sent: Wednesday, July 25, 2001 10:29 PM Cc: emc-p...@majordomo.ieee.org Subject: RE: How Safe ??? Now that's interesting! Is there actually a standard for the delivery temperature of products such as coffee, cocoa, tea, sodas, Popsicles, ice cream and banana splits? Regards, Ed -Original Message- From: lisa_cef...@mksinst.com [mailto:lisa_cef...@mksinst.com] Sent: Wednesday, July 25, 2001 7:49 AM To: John Juhasz Cc: emc-p...@majordomo.ieee.org; 'oover...@lexmark.com'; owner-emc-p...@majordomo.ieee.org Subject: Re: How Safe ??? ... Just for the record, in the case against McDonalds, that particular McDonalds had be cited several times prior by inspectors for keeping their coffee too hot, they repeatedly paid the fine and ignored the warnings The law suit was long overdue (PS, I do agree with you though on most of the points you make) SNIP --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on Virtual Conference Hall,
RE: Oils for the 950 Hot Flaming Oil Test
Peter, Here is a link to the MSDS data sheet from the company I buy chemicals from. They have numerous other data sheets but only for the chemicals they sell. It lists synonyms for Kerosene which may help you locate other sources that go by another name. http://www.jtbaker.com/cgi-bin/msds-s.pl?searchdata=P339int=false Dan -Original Message- From: Peter Merguerian [mailto:pmerguer...@itl.co.il] Sent: Thursday, July 26, 2001 3:19 AM To: EMC-PSTC (E-mail) Subject: Oils for the 950 Hot Flaming Oil Test Dear All, Does anyone have the MSDS for Kerosene # 1? This is the oil used by UL to conduct the Hot Flaming Oil Test in the UL60950/EN 60 950 ITE standards when the bottom openings do not comply with some of the bottom cfonstructions specified in the standard. I am also trying to determine other types of oils (and relevant MSDSs) which may be suitable for the test. PETER S. MERGUERIAN Technical Director I.T.L. (Product Testing) Ltd. 26 Hacharoshet St., POB 211 Or Yehuda 60251, Israel Tel: + 972-(0)3-5339022 Fax: + 972-(0)3-5339019 Mobile: + 972-(0)54-838175 --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on Virtual Conference Hall, --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on Virtual Conference Hall,
RE: Copper Thieving
Capacitively. If your floating structure ends up being resonate at a fundamental or one of the harmonics it will become a very effective unintentional radiator. Dan -Original Message- From: David Gelfand [mailto:gelf...@memotec.com] Sent: Thursday, January 18, 2001 2:34 PM To: emc-p...@majordomo.ieee.org Subject: Re: Copper Thieving How does electrically floating copper interact with electromagnetic fields? David --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: Copper Thieving
I make them ground it with appropriately spaced vias. -Original Message- From: Perry Qu [mailto:perry...@alcatel.com] Sent: Thursday, January 18, 2001 4:19 PM To: Roman, Dan Cc: 'Stephen Phillips'; rehel...@mmm.com; emc-p...@majordomo.ieee.org; DORIN OPREA Subject: Re: Copper Thieving Hi! Dan: I understand that EMC guys don't want to see the floating coppers on the PCB because of ESD and/or emission problem. But on the manufacture side, they claim that if you don't do copper balance on the layer where you have large area without copper, you will sure have over-eching in that area, plus warpage of the board. The question is, where do we find a compromised solution that makes everyone happy ? Regards Perry --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: Copper Thieving
Remember that you can also cause yourself all kinds of EMI headaches if you have electrically floating copper areas or patterns on the board. It has lead to many arguments with the CAD department over the years! -- Dan -Original Message- From: Stephen Phillips [mailto:step...@cisco.com] Sent: Thursday, January 18, 2001 9:33 AM To: rehel...@mmm.com; emc-p...@majordomo.ieee.org Subject: Re: Copper Thieving Copper applied to the outer PCB layers, in a pattern, to even out the copper placement so the board is less likely to warp through soldering. Obviously, it would be put where there is not etch, large open areas, to somewhat offset where you might have planes of copper elsewhere on the layer. Beware of Creepage and Clearance violations (if applicable). Some PCB fab. houses have carte-blanche to add this, we don't allow that - and control it as part of our own PCB CAD instead. Best regards, Stephen At 09:15 AM 1/18/01 Thursday , rehel...@mmm.com wrote: Please excuse my lack of knowledge..what is copper thieving? --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: Thermocouple issues
I use either epoxy or a cement made out of water glass and kaolin powder. I have a thermocouple welder so I'm not too concerned about keeping them intact while removing them. -- Dan Roman, Compliance Engineer Dialogic®, an Intel Company 1515 Rt. Ten, Parsippany, NJ 07054 mailto:dan.ro...@dialogic.com Mail Stop: 2PY2-021 Voice: +1 (973) 967-6485 Fax: +1 (973) 967-8109 -Original Message- From: Joe Finlayson [mailto:jfinlay...@telica.com] Sent: Friday, December 15, 2000 2:53 PM To: 'NEBS Newsgroup'; 'EMC PSTC' Subject: Thermocouple issues I am in the process of performing a thermal evaluation and am using thermocouples to measure surface temperatures of IC's, etc. I'm finding that the thermocouple tape that I'm using tends to experience a degradation of the adhesive as the temperatures increase (in the 80-100°C range) causing the thermocouples to separate from the surfaces. I'd appreciate any advice that could point to a higher performing tape/adhesive for such an application. Some of the IC's are quite small which doesn't leave much surface area for adhesion and I am using as many as 40 thermocouples per card. Thx, Joe * ... Joe Finlayson Manager, Compliance Engineering Telica, Inc. 734 Forest Street, Bldg. G, Suite 100 Marlboro, MA 01752 Tel:(508) 480-0909 x212 Fax:(508) 480-0922 Email: jfinlay...@telica.com Web:www.telica.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Job Opening: Regulatory Technician/Engineering Aide
Here's your chance to join Dialogic, an Intel subsidiary, in Parsippany New Jersey. As the leader in open computer telephony (CT), Dialogic provides the critical building blocks and technical services that enable customers to develop solutions serving the converging Internet and telecommunications market segments. Dialogic products are used in voice, fax, data, speech recognition and synthesis, call center management and Internet Protocol (IP) telephony applications in both customer premise equipment (CPE) and public network environments. Responsibilities: Technical and documentation functions in the support of product safety, electro-magnetic compatibility, and telecommunication certifications. Performs testing and design troubleshooting as well as report writing and preparation of technical documentation to be submitted to regulatory agencies. Responsible for operation and maintenance of EMC, Safety, and telecommunications labs. Travel required, one day per week to local test houses, long distance overnight travel required several times a year. Qualifications: Requires an AA electrical degree, military/vocational technical training, or equivalent experience (3-5 years). You must also possess: - Excellent verbal and written communication and interpersonal skills. - Ability to track and coordinate multiple simultaneous projects. - Working knowledge of PC hardware configuration and Windows NT based software. - Experience with lab test equipment (spectrum analyzers, oscilloscopes, DVM, etc.). - Product support and troubleshooting experience - Prior experience in product safety, EMI, or telecommunications a plus. Interested? Submit your resume today. Contact Judy Sarver (973) 967-6626 mailto:judy.sar...@dialogic.com. Employment Practices Intel hires qualified candidates who are authorized to work in the U.S.-- that is, authorized to work without restriction as to a particular employer. This includes U.S. citizens or nationals, U.S. legal permanent residents, temporary residents granted legalization under the Immigration Reform and Control Act of 1986, asylees, and refugees. For foreign nationals who do not fall in one of the above categories, we limit our hiring of persons requiring visa sponsorship or individuals currently on a non-immigrant visa (e.g., H-1, J-1, L-1, F-1, B-1, TN) to candidates at the MS and PhD levels (or those who have equivalent work experience) who are applying for positions for which there is a demonstrated shortage of qualified U.S. candidates. At Intel, we are committed to equal employment opportunity. We respect, value and welcome diversity in our workforce, as well as in our customers, our suppliers and the global marketplace. Intel also values being a great place to work and strives to maintain a safe and drug-free workplace. Accordingly, Intel conditions all offers of employment on satisfactory completion of a drug screen (where allowed) and a background check. Intel 's Vision- One Billion Connected Computers, Millions of Servers and Trillions of Dollars of E-Commerce. Sound exciting? Here is just one of the exciting opportunities that will make it happen. Get into it!! -- Dan Roman, Compliance Engineer Dialogic®, an Intel Company 1515 Rt. Ten, Parsippany, NJ 07054 mailto:dan.ro...@dialogic.com Mail Stop: 2PY2-021 Voice: +1 (973) 967-6485 Fax: +1 (973) 967-8109 --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: PDF file copy method
One thing not mentioned in all the posts on this subject is that if the document was scanned and not captured then the text is really graphics and would not be selectable as text. Thankfully most documents these days are created directly from the source document into a PDF using PDF Writer which allows the file to be compact and the text selectable. This is not always the case though. -- Dan Roman, Compliance Engineer Dialogic®, an Intel Company 1515 Rt. Ten, Parsippany, NJ 07054 mailto:dan.ro...@dialogic.com Mail Stop: 2PY2-021 Voice: +1 (973) 967-6485 Fax: +1 (973) 967-8109 --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: NEAR/ FAR FIELD CORRELATION ISSUES
I also have been following this thread with interest, but even more practical and technically less challenging alternate methods of testing take too long for acceptance in my opinion. Forget near-field measurements with probes, I'd like to see quicker movement on acceptance of standards like EN50147-3 for fully anechoic compact chambers. I'm not going to get greedy and look for (or expect) near field or cable clamp measurement acceptance in the near future. Since I mentioned it, does anyone know if there is movement or progress in the area of standards tailored specifically for compact chambers like EN50147-3? -- Dan Roman, Compliance Engineer * mailto:dan.ro...@dialogic.com *Voice: +1 (973) 993-3000 ext. 6485 Fax: +1 (973) 993-8466 - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
