Permanent Delivery Failure
The attached message had PERMANENT fatal delivery errors! After one or more unsuccessful delivery attempts the attached message has been removed from the mail queue on this server. The number and frequency of delivery attempts are determined by local configuration parameters. YOUR MESSAGE WAS NOT DELIVERED! Failed address: john.dav...@polycom.com --- Session Transcript --- MX-record resolution of [polycom.com] in progress (DNS Server: 63.102.226.211)... P=020 D=polycom.com TTL=(5) MX=[mail.polycom.com] {216.52.12.3} P=010 D=polycom.com TTL=(5) MX=[mail.polycom.com] {216.52.12.3} Attempting MX: P=010 D=polycom.com TTL=(5) MX=[mail.polycom.com] {216.52.12.3} Attempting SMTP connection to [216.52.12.3 : 25] Waiting for socket connection... Socket connection established Waiting for protocol initiation... 220 corpit05.polycom.com ESMTP Server (Microsoft Exchange Internet Mail Service 5.5.2653.13) ready EHLO chatspace.com 250-corpit05.polycom.com Hello [63.102.226.201] 250-XEXCH50 250-HELP 250-ETRN 250-DSN 250-SIZE 0 250-AUTH LOGIN 250 AUTH=LOGIN MAIL From: SIZE=2976 553 malformed address: SIZE=2976 QUIT --- End Transcript --- : Message contains [1] file attachments - This multipart message contained a part at this location which was removed : Content-Type: message/rfc822; charset=US-ASCII; name="md50002473743.md" Content-Transfer-Encoding: 7bit Content-ID: Content-Description: Replies to this message may be posted in a public forum. --- 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: Resistors pulse loading capabilities
Massimo, Just to underscore what others have stated, long ago in one of the resistor mfr's catalogues, there was a discussion of this topic. Essentially, do not violate the DC wattage rating of the resistor based on a 1 second time period. As an example, a 1W, 1 Ohm, carbon composition resistor should be able to handle a. 1A (or 1V potential) continuously, b. 2A (or 2V potential) at 50% duty cycle, i.e. 1/2 second duration, c. 4A at 25% duty cycle, i.e. 1/4 second duration, etc ... all the way up to the maximum voltage rating of the resistor. For a 600V rated resistor, this would mean the maximum pulse allowed would be 600V peak for less than or equal to 1/600th second or 1.6 milliseconds. This particular conclusion I have doubts about. I explain below. Fusing characteristics of wires is non-linear and therefore for large currents through a resistor (I don't know what that might be), I doubt the above. But for low currents, let's say less than 10 times the current rating of the resistor for the sake of argument (in the case above, that would mean anything less than 10 amps), I think that's acceptable. This is all spectulation and I am by no means an expert. But, if there is any question, please consult the mfr. - Doug McKean --- 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: Bellcore Redundancy Requirements?
I'd be interested as well, for two reasons. 1) I think the requirement is a bit out of date, and really only discusses bringing in two DC power feeds, A and B. That however seems more adapted to the days of simpler systems that would take the power through some steering diodes and take it straight to a back plane and power all of the cards in the box. As things have become more complex systems inject system power supplies (DC-DC for example) into the network but the standards don't seem to address the need for redundancy at this point. Unfortunately, I don't have the document in my hands, it was a question that came up during some recent testing. 2) Isn't L-10 a fan type of specification. The point at which 10% of the fans fail. I have been chasing this question on and off for awhile. Thanks Gary -Original Message- From: kazimier_gawrzy...@dell.com [mailto:kazimier_gawrzy...@dell.com] Sent: Saturday, February 16, 2002 7:25 AM To: emc-p...@ieee.org Subject: RE: Bellcore Redundancy Requirements? Hello All, If any members of this forum have any response copies that were sent out to John's question below, would you please forward a copy to me? Thanks In Advance, Kaz Gawrzyjal kazimier_gawrzy...@dell.com -Original Message- From: Kretsch, John [mailto:john_kret...@adc.com] Sent: Wednesday, February 14, 2001 12:37 PM To: 'emc-p...@ieee.org' Subject: Bellcore Redundancy Requirements? Does anyone in the collective know about _where_ Bellcore spells out any sort of redundancy requirements. There is a buzz about "L-10" requirements and I'm not sure where this comes from. TIA. Regards, John Kretsch --- 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. 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"
SV: Industrial Locations
I only have the generic EN50082-2 (immunity) and EN50081-2 (emission) standards, so I quote the description of locations from these standards: QUOTE start Industrial locations are characterized by the existence of one or more of the following conditions: - industrial, scientific and medical apparatus are present - heavy inductive or capacitive loads are frequently switched - current and associated field are high These are the major contributors to the industrial electromagnetic environment and as such distinguish the industrial from other environments. QUOTE end There are no other industrial examples in these generic standards. Amund, Oslo/Norway -Opprinnelig melding- Fra: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]På vegne av richwo...@tycoint.com Sendt: 19. februar 2002 15:45 Til: emc-p...@majordomo.ieee.org Emne: Industrial Locations Do the Generic emission and immunity ENs for industrial locations provide examples of those locations? If so, I would appreciate someone providing the list of the example locations. I need to compare them against the examples of light-industrial locations. Thanks in advance. Richard Woods Sensormatic Electronics Tyco International --- 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: EN61000-6-2
Hi Gert, Thanks for the reply. EN61000-6-2 calls EN61000-4-6, so I was indirectly referencing that standard. I neglected to apply the equations of section 6.4.1 as pointed out to me by Brian Kunde. My thanks to him and to you for your offer. Kind Regards, Sam Wismer Engineering Manager ACS, Inc. Phone: (770) 831-8048 Fax: (770) 831-8598 Web: www.acstestlab.com -Original Message- From: Gert Gremmen : ce-test, qualified testing [mailto:g.grem...@cetest.nl] Sent: Tuesday, February 19, 2002 1:46 PM To: Sam Wismer; EMC Forum Subject: RE: EN61000-6-2 Hi Sam, I do not understand how an attenuator may alter the impedance level of the CDN output so as to create a high VSWR ? The measuring receiver has 50 Ohms in, and adding an attenuator won't change that ? Do you calibrate for impedance level, or for voltage transfer into 150 Ohms environment ? BTW the standard you need is EN 61000-4-6 ! If you want to call me in the netherlands on +31 10 415 2426 Gert gremmen -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Sam Wismer Sent: dinsdag 19 februari 2002 17:52 To: EMC Forum Subject: EN61000-6-2 Hi Group, EN 61000-6-2 calls for severity level 3, or 10Vrms for conducted disturbances. This equates to 37dBm which is 7dB higher than the upper limit my receiver will handle (during calibration of the CDN). I've tried to use an attenuator and compensate for it in my readings, but this creates a high VSWR. Any ideas how to extend the dynamic range of my receiver without causing high VSWR? Kind Regards, Sam Wismer Engineering Manager ACS, Inc. Phone: (770) 831-8048 Fax: (770) 831-8598 Web: www.acstestlab.com
RE: Resistors pulse loading capabilities
I suspect that this will depend very strongly on the characteristics of specific type of resistor. Further, there will undoubtedly be very significant differences from manufacturer to manufacturer, in the ability to absorb stresses well beyond normal design intent. I think it would be rather hard (or even perhaps impossible) to make generalizations that would apply to, for example, all 1 Watt resistors. Bob Wilson TIR Systems Ltd. Vancouver. -Original Message- From: Massimo Polignano [mailto:massimo.polign...@esaote.com] Sent: February 18, 2002 6:03 AM To: emc-p...@majordomo.ieee.org Subject: Resistors pulse loading capabilities Does anybody out of there know what are the methods to evaluate resistors pulse loading capabilities (maximum peak pulse voltage without failing to open circuit)? Is there any standard models? This could be very useful to design the power supply circuit parts involved in a surge immunity test. Thanks in advance. m.p. - ESAOTE S.p.A. Massimo Polignano Research & Product DevelopmentDesign Quality Control Mngr Via di Caciolle,15tel:+39.055.4229402 I- 50127 Florence fax:+39.055.4223305 e-mail: massimo.polign...@esaote.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: EN61000-6-2
I read in !emc-pstc that Sam Wismer wrote (in <001d01c1b965$b6143e60$0201a8c0@sam>) about 'EN61000-6-2', on Tue, 19 Feb 2002: > Ive tried to use an attenuator and compensate for it in my readings, but >this creates a high VSWR. Any ideas how to extend the dynamic range of my >receiver without causing high VSWR? > Your attenuator is either of a very wrong impedance or faulty. Attenuators normally improve SWR considerably. Can you give more details of what you are doing? -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk After swimming across the Hellespont, I felt like a Hero. 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...@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: Cat 3 vs. Cat 5
Hello, The two cables are for LAN connections. Cat3 has bandwidth of 16 MHz, cat5 has 100 MHz. The LAN cables in this time are per Cat5e or Cat6. You can find information in: http://www.connectworld.net/c1.html Regards Jacob -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org] On Behalf Of Reginald Henry Sent: Tuesday, February 19, 2002 9:40 PM To: emc-p...@majordomo.ieee.org Subject: RE: Cat 3 vs. Cat 5 Hello Group, Can anyone direct me toward a site that will give me information about " the industry standard " concerning the "twist per inch " for the different categories of Network Cable wires i.e. Cat 3 vs. Cat 5 ? Thanks, Reg -Original Message- From: Colgan, Chris [mailto:chris.col...@tagmclaren.com] Sent: Thursday, February 07, 2002 11:43 AM To: emc-p...@majordomo.ieee.org Subject: RE: Immunity Standards Very good point! Chris > -Original Message- > From: John Woodgate [SMTP:j...@jmwa.demon.co.uk] > Sent: 07 February 2002 11:03 > To: emc-p...@majordomo.ieee.org > Subject: Re: Immunity Standards > > > I read in !emc-pstc that Colgan, Chris > wrote (in ) about > 'Immunity Standards', on Thu, 7 Feb 2002: > >If your question is "what are the differences?" the answer is > >"considerable". It is beyond the scope of this forum to list the > >differences, I'm afraid you will have to purchase copies of the > standards. > > I don't see that the OP needs to purchase the long-superseded 1992 > version. It would be better to purchase EN61000-6-1! > -- > Regards, John Woodgate, OOO - Own Opinions Only. > http://www.jmwa.demon.co.uk > After swimming across the Hellespont, I felt like a Hero. > 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...@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" ** Please visit us at www.tagmclaren.com ** The contents of this E-mail are confidential and for the exclusive use of the intended recipient. If you receive this E-mail in error, please delete it from your system immediately and notify us either by E-mail, telephone or fax. You should not copy, forward or otherwise disclose the content of the E-mail. TAG McLaren Audio Ltd The Summit, 11 Latham Road Huntingdon, Cambs, PE29 6ZU Telephone : 01480 415600 (+44 1480 415600) Facsimile : 01480 52159 (+44 1480 52159) ** Please visit us at www.tagmclaren.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" --- 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: Chamber Doors
With regards to "beryllium" fingers, they are not beryllium. They are an alloy of copper and beryllium, with the standard C17000 alloy containing only 1.7% beryllium. There is no danger in simply handling these fingers. To be sure, there is a danger in breathing in dust from machining actual beryllium. This danger is less for Be-Cu alloy (owing to the low beryllium content). But this is not particularly relevant here because it is unlikely that any operation will be carried out that can create any significant beryllium "dust" when simply cleaning Be-Cu fingers. Further, these fingers are generally plated with another metal to eliminate poor contact due to tarnishing or corrosion, so one is generally not even touching the Be-Cu alloy at all. Bob Wilson TIR Systems Ltd. Vancouver. -Original Message- From: Wan Juang Foo [mailto:f...@np.edu.sg] Sent: February 19, 2002 2:08 AM To: ieee pstc list Subject: Re: Chamber Doors The other problem could be that whoever build the chamber did not make the door. They buy it off from someone else and the warranty is only one year. :-) One year seems to be reasonable period considering that there is a number of things that can go wrong with moving parts that are constantly held under pressure. BTW, 'Be' (Beryllium) is a highly toxic metal that will not get out of your blood once it enters it. I would strongly advise anyone cleaning their Be-Cu finger stocks from exposing themselves to any possibilities of cuts or abrassions while cleaning these 'fingers'. I understand the concentrations of Be is low but why would anyone take the risk of prolonged exposure to Be dust and metal chippings? Tim Foo --- 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"
EN61000-6-2
Hi Group, EN 61000-6-2 calls for severity level 3, or 10Vrms for conducted disturbances. This equates to 37dBm which is 7dB higher than the upper limit my receiver will handle (during calibration of the CDN). I've tried to use an attenuator and compensate for it in my readings, but this creates a high VSWR. Any ideas how to extend the dynamic range of my receiver without causing high VSWR? Kind Regards, Sam Wismer Engineering Manager ACS, Inc. Phone: (770) 831-8048 Fax: (770) 831-8598 Web: www.acstestlab.com
Industrial Locations
Do the Generic emission and immunity ENs for industrial locations provide examples of those locations? If so, I would appreciate someone providing the list of the example locations. I need to compare them against the examples of light-industrial locations. Thanks in advance. Richard Woods Sensormatic Electronics Tyco International --- 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: Resistors pulse loading capabilities
>-Original Message- >From: John Barnes [mailto:jrbar...@iglou.com] >Sent: Tuesday, February 19, 2002 4:45 AM >To: emc-p...@majordomo.ieee.org >Subject: Re: Resistors pulse loading capabilities > > > >Massimo, >All the tests that I've seen for evaluating the peak-pulse-power >handling capabilities of resistors are based on charging a bank of >capacitors to a high voltage, then applying this energy (E = >1/2 * c * V >* V) to the part/equipment-under-test through a low-resistance >low-inductance switch or relay. You need to be very careful running >these tests, because there is enough energy involved to kill you! > >For the Keytek surge generator that I used to run IBM Lightning Surge >Susceptibility tests on network adapter cards, this came to something >like 4 joules at 800 volts, with the tester rated to deliver up to 200 >amps maximum. That tester required you to toggle two widely-spaced >switches to trigger a discharge, to make sure that you had >both hands on >the tester. I always triple-checked my test setup, then had another >experienced engineer double-check me, before I even plugged in >the surge >tester. I blew up quite a few components, and fried a few circuit >boards, while developing/helping develop some 35 IBM and Lexmark >networking/digital-office products from 1990 through January 2002. > >NOTE: You also want to put a direct short across the >capacitors when the >tester is not in use. Dielectric absorbtion stores some energy in the >dielectric of a capacitors as a physical displacement of the atoms. >This can take seconds to hours to relax, and as it does it induces a >corresponding charge on the capacitors' plates. Without a bleeder >resistor of some type across the capacitors, up to 10% or so of the >initial charging voltage can appear on the capacitors after they have >supposedly been discharged. This could give you a nasty, if non-fatal >shock, next time you want to use the tester. > >As for help choosing the resistors for your circuit, check out >The Resistor Handbook by Cletus J. Kaiser (98 pages, 1994, CJ >Publishing, Olathe, Kansas, ISBN 0-9628525-1-1). This is the best >single source I've found for information on resistors. On >page 3, under >the subheading One Short Pulse it says: > "The theory of pulse handling depends on the pulse width. > One > short pulse of 100 milliseconds or less is assumed to never >havetime enough to do more than heat the element. Therefore >the > calculation is based on the total mass of the element (wire) >being heated to the maximum internal hot-spot temperature." > >As Bob Wilson said, this will depend on the overall type of resistor, >and on the specific details of its construction (i.e. manufacturer/ >series). You need to consider the bulk sections of the resistor, which >have relatively-uniform construction, and the interfaces between them. > >So I would expect bulk-metal resistors, such as those made by >Vishay, to >have the highest peak-power/rated-power capability because they are >essentially one piece of metal. From there I would look at: >1. Carbon-composition resistors. >2. Wirewound resistors. >3. Untrimmed metal-film resistors. >4. Untrimmed carbon-film resistors. >5. Untrimmed cermet resistors. >6. Trimmed metal-film resistors. >7. Trimmed carbon-film resistors. >8. Trimmed cermet resistors. > >The untrimmed film resistors have rather sloppy tolerances, on >the order >of +/-20% or so, but have much higher pulse-power handling capability >than their trimmed brethren. (We got bitten by this, when purchasing >had trouble getting the part we had specified for a Token-Ring >card, and >substituted a part that the salesman said "was even better >than" the one >we wanted.) If you must use a trimmed resistor, because of tolerances, >abrasive trimming would probably be better than laser trimming, because >it makes a smoother cut and leaves less debris. > >I found it very educational to look at resistors under a microscope >(about 10-30x magnification sufficed), both before and after >running the >Lightning Surge Susceptibility test. The failed resistors looked like >they had been machine-gunned, with a vertical line of pits across the >surface of the resistor from the corner of the "L" (left by >trimming) to >the edge of the resistor. > > John Barnes > dBi Corporation > >--- Let me add one more type of resistor, right at the top of your list. I have used silicon carbide resistors (made by Carborundum, then Ceseiwid, now the name has changed again) as pulse generator loads and source impedance adjustors. These resistors have the inductance of a similar sized piece of rod stock, and can handle tremendous short duration currents. They can function properly right up to the point of glowing. They withstand high voltages pretty well (best to cho
RE: Chamber Doors
"Are you sure? Berylium Oxide (BeO) has a long-standing reputation for being toxic, but I've never heard of metalic berylium (Be) posing a problem." See the following for more details: http://www.atsdr.cdc.gov/tfacts4.html Paul Hare e: ph...@pirus.com Compliance Engineer w: 978.206.9179 Pirus Networks f: 978.206.9199 43 Nagog Park c: 508.450.0376 Acton, MA 01720 i: www.pirus.com -Original Message- From: plaw...@west.net [mailto:plaw...@west.net] Sent: Tuesday, February 19, 2002 12:07 PM To: EMC-PSTC Subject: Re: Chamber Doors On Tue, 19 Feb 2002 18:08:09 +0800, "Wan Juang Foo" wrote: >BTW, 'Be' (Beryllium) is a highly toxic metal that will not get out of your >blood once it enters it. I would strongly advise anyone cleaning their >Be-Cu finger stocks from exposing themselves to any possibilities of cuts >or abrassions while cleaning these 'fingers'. >I understand the concentrations of Be is low but why would anyone take the >risk of prolonged exposure to Be dust and metal chippings? Are you sure? Berylium Oxide (BeO) has a long-standing reputation for being toxic, but I've never heard of metalic berylium (Be) posing a problem. Patrick Lawler plaw...@west.net --- 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: Cat 3 vs. Cat 5
Hello Group, Can anyone direct me toward a site that will give me information about " the industry standard " concerning the "twist per inch " for the different categories of Network Cable wires i.e. Cat 3 vs. Cat 5 ? Thanks, Reg -Original Message- From: Colgan, Chris [mailto:chris.col...@tagmclaren.com] Sent: Thursday, February 07, 2002 11:43 AM To: emc-p...@majordomo.ieee.org Subject: RE: Immunity Standards Very good point! Chris > -Original Message- > From: John Woodgate [SMTP:j...@jmwa.demon.co.uk] > Sent: 07 February 2002 11:03 > To: emc-p...@majordomo.ieee.org > Subject: Re: Immunity Standards > > > I read in !emc-pstc that Colgan, Chris > wrote (in ) about > 'Immunity Standards', on Thu, 7 Feb 2002: > >If your question is "what are the differences?" the answer is > >"considerable". It is beyond the scope of this forum to list the > >differences, I'm afraid you will have to purchase copies of the > standards. > > I don't see that the OP needs to purchase the long-superseded 1992 > version. It would be better to purchase EN61000-6-1! > -- > Regards, John Woodgate, OOO - Own Opinions Only. > http://www.jmwa.demon.co.uk > After swimming across the Hellespont, I felt like a Hero. > 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...@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" ** Please visit us at www.tagmclaren.com ** The contents of this E-mail are confidential and for the exclusive use of the intended recipient. If you receive this E-mail in error, please delete it from your system immediately and notify us either by E-mail, telephone or fax. You should not copy, forward or otherwise disclose the content of the E-mail. TAG McLaren Audio Ltd The Summit, 11 Latham Road Huntingdon, Cambs, PE29 6ZU Telephone : 01480 415600 (+44 1480 415600) Facsimile : 01480 52159 (+44 1480 52159) ** Please visit us at www.tagmclaren.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" --- 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: Resistors pulse loading capabilities
Massimo, All the tests that I've seen for evaluating the peak-pulse-power handling capabilities of resistors are based on charging a bank of capacitors to a high voltage, then applying this energy (E = 1/2 * c * V * V) to the part/equipment-under-test through a low-resistance low-inductance switch or relay. You need to be very careful running these tests, because there is enough energy involved to kill you! For the Keytek surge generator that I used to run IBM Lightning Surge Susceptibility tests on network adapter cards, this came to something like 4 joules at 800 volts, with the tester rated to deliver up to 200 amps maximum. That tester required you to toggle two widely-spaced switches to trigger a discharge, to make sure that you had both hands on the tester. I always triple-checked my test setup, then had another experienced engineer double-check me, before I even plugged in the surge tester. I blew up quite a few components, and fried a few circuit boards, while developing/helping develop some 35 IBM and Lexmark networking/digital-office products from 1990 through January 2002. NOTE: You also want to put a direct short across the capacitors when the tester is not in use. Dielectric absorbtion stores some energy in the dielectric of a capacitors as a physical displacement of the atoms. This can take seconds to hours to relax, and as it does it induces a corresponding charge on the capacitors' plates. Without a bleeder resistor of some type across the capacitors, up to 10% or so of the initial charging voltage can appear on the capacitors after they have supposedly been discharged. This could give you a nasty, if non-fatal shock, next time you want to use the tester. As for help choosing the resistors for your circuit, check out The Resistor Handbook by Cletus J. Kaiser (98 pages, 1994, CJ Publishing, Olathe, Kansas, ISBN 0-9628525-1-1). This is the best single source I've found for information on resistors. On page 3, under the subheading One Short Pulse it says: "The theory of pulse handling depends on the pulse width. One short pulse of 100 milliseconds or less is assumed to never havetime enough to do more than heat the element. Therefore the calculation is based on the total mass of the element (wire) being heated to the maximum internal hot-spot temperature." As Bob Wilson said, this will depend on the overall type of resistor, and on the specific details of its construction (i.e. manufacturer/ series). You need to consider the bulk sections of the resistor, which have relatively-uniform construction, and the interfaces between them. So I would expect bulk-metal resistors, such as those made by Vishay, to have the highest peak-power/rated-power capability because they are essentially one piece of metal. From there I would look at: 1. Carbon-composition resistors. 2. Wirewound resistors. 3. Untrimmed metal-film resistors. 4. Untrimmed carbon-film resistors. 5. Untrimmed cermet resistors. 6. Trimmed metal-film resistors. 7. Trimmed carbon-film resistors. 8. Trimmed cermet resistors. The untrimmed film resistors have rather sloppy tolerances, on the order of +/-20% or so, but have much higher pulse-power handling capability than their trimmed brethren. (We got bitten by this, when purchasing had trouble getting the part we had specified for a Token-Ring card, and substituted a part that the salesman said "was even better than" the one we wanted.) If you must use a trimmed resistor, because of tolerances, abrasive trimming would probably be better than laser trimming, because it makes a smoother cut and leaves less debris. I found it very educational to look at resistors under a microscope (about 10-30x magnification sufficed), both before and after running the Lightning Surge Susceptibility test. The failed resistors looked like they had been machine-gunned, with a vertical line of pits across the surface of the resistor from the corner of the "L" (left by trimming) to the edge of the resistor. John Barnes dBi Corporation --- 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: Chamber Doors
On Tue, 19 Feb 2002 18:08:09 +0800, "Wan Juang Foo" wrote: >BTW, 'Be' (Beryllium) is a highly toxic metal that will not get out of your >blood once it enters it. I would strongly advise anyone cleaning their >Be-Cu finger stocks from exposing themselves to any possibilities of cuts >or abrassions while cleaning these 'fingers'. >I understand the concentrations of Be is low but why would anyone take the >risk of prolonged exposure to Be dust and metal chippings? Are you sure? Berylium Oxide (BeO) has a long-standing reputation for being toxic, but I've never heard of metalic berylium (Be) posing a problem. Patrick Lawler plaw...@west.net --- 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: New Generic ENs
Richard, EN 61000-6-1 has common deviations in clause 2, 3.5, Table 1 and Table 5. EN 61000-6-3 has common deviations in clause 2, 4, 9, Table 1 and Annex A. Both standards have an Annex ZA showing comparison between international and EN/HD standards. Hope this helps. Regards, Kris Carpentier richwo...@tycoint.com on 19.02.2002 15:59:49 Please respond to richwo...@tycoint.com To: emc-p...@majordomo.ieee.org cc: (bcc: Kristiaan CARPENTIER/BE/ALCATEL) Subject: New Generic ENs Are EN 61000-6-1 and -3 identical to the IEC generic standards, or did CENELEC introduce modifications? Richard Woods Sensormatic Electronics Tyco International --- 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: Flammabilty requirement for cloth used on loudspeaker / UL6500
I have heard the "lilly" tablets can be purchased at Target stores, although I have not yet verified this. Ed >From: Rich Nute >Reply-To: Rich Nute >To: e.l...@wanadoo.fr >CC: emc-p...@majordomo.ieee.org >Subject: Re: Flammabilty requirement for cloth used on loudspeaker / UL6500 >Date: Wed, 13 Feb 2002 13:35:17 -0800 (PST) > > >Hi Pierre: > > > > Unfortunately, Hexamine is temporarely unavailable from IMSPLUS, and, > > furthermore, this product cannot be sold outside the US. > > > > If somebody knows another source, he's welcome ! > >I did a Google search and found at least one more source: > > http://www.omahas.com/store/commerce.pl?product=Messkits > >I believe there are some Euro sources in the Google results, >but I did not check all the listed sources. > > >Good luck and 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...@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" Send and receive Hotmail on your mobile device: Click Here --- 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: Chamber Doors
The other problem could be that whoever build the chamber did not make the door. They buy it off from someone else and the warranty is only one year. :-) One year seems to be reasonable period considering that there is a number of things that can go wrong with moving parts that are constantly held under pressure. BTW, 'Be' (Beryllium) is a highly toxic metal that will not get out of your blood once it enters it. I would strongly advise anyone cleaning their Be-Cu finger stocks from exposing themselves to any possibilities of cuts or abrassions while cleaning these 'fingers'. I understand the concentrations of Be is low but why would anyone take the risk of prolonged exposure to Be dust and metal chippings? Tim Foo |-+-> | | Cortland Richmond | | | <72146.373@compuserve.| | | com> | | | Sent by: | | | owner-emc-pstc@majordo| | | mo.ieee.org | | | | | | | | | 02/12/02 01:23 AM | | | Please respond to | | | Cortland Richmond | | | | |-+-> >---| | | |To: "djumbdenst...@tycoint.com" , ieee pstc list| |cc: (bcc: Wan Juang Foo/ece/staff/npnet) | |Subject: Re: Chamber Doors | >---| >> Can you share with us what experiences you have had with doors of your steel clad chambers? If you could share such things as chamber vendor, hinge adjustments, door maintenance recommended and performed, warranty claims and length of time without problems, that would help us understand the 1 year policy. Anyone have any interesting stories? << Don, >From the numbers you gave, I'd say the reason is, the doors are five times more likely to fail than the chambers. This is reasonable - they are the only things that move. And I'd say that the causes of failure are more related to installation practice and maintenance, than to design, so a one-year warranty will cover problems due to (say) being slightly mishung. Though workmanship should have its own warranty, if their team installs it. After a year, door failures are likely almost ALL due to maintenance or its lack, than to materials and installation. I've rarely seen folks doing monthly maintenance on the fingers that seal a door. That's MY two cents. Cortland --- 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"
New Generic ENs
Are EN 61000-6-1 and -3 identical to the IEC generic standards, or did CENELEC introduce modifications? Richard Woods Sensormatic Electronics Tyco International --- 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"
Wood Packaging Treatment
The following information is being forwarded since someone recently asked about the subject. The information is extracted with permission from Recycling Policy NewsBriefs Email Bulletin for Raymond Communications, Inc. College Park MD, publishers of State Recycling Laws Update and Recycling Laws International. All material copyright 2001, Raymond Communications. http://www.raymond.com February 16, 2002 Wood Packaging to Face Major Restrictions New international laws and standards will have a major impact on how end-users deal with their solid wood packaging. The European Union, Finland, Brazil, China and other countries already restrict un-treated coniferous wood packaging. Thus, end-users need to purchase packaging that is heat-treated and stamped. But draft international standards for wood packaging go much farther - requiring either fumigation or heat treatment of any raw wood packaging - including hardwoods (e.g. pallets) and dunnage. The draft standard, from the Secretariat of the International Plant Protection Convention, Food and Agriculture Organization of the United Nations has drafted new guidelines designed to keep foreign pests from eating away at forests. Besides treatment, the draft standards require complete de-barking - a requirement that may be impossible to enforce, according to experts at the U.S.Department of Agriculture. The standard allows a wide variety of treatments, including heat treatment or methyl bromide fumigation. The packaging, which includes wooden dunnage, must be marked with the symbol, plus the method of treatment, country of origin, and number of the original producer of the packaging. Exporters must purchase a finished package with the proper stamping if it gets exported. If you produce or modify the wood package (e.g. repair the pallet) USDA says you will have to get it treated and inspected to certify wood packaging leaving the country. --- 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: Resistors pulse loading capabilities
Hi Massimo, Try http://www.vtm.co.uk/. They had a good calculation method in the printed version of their catalog which does not seem to be available on the website ( I haven't looked very hard for it). It worked well for sizing in-rush limiting resistors. Regards - Chris -Original Message- From: Massimo Polignano [SMTP:massimo.polign...@esaote.com] Sent: Monday, February 18, 2002 2:03 PM To: emc-p...@majordomo.ieee.org Subject:Resistors pulse loading capabilities Does anybody out of there know what are the methods to evaluate resistors pulse loading capabilities (maximum peak pulse voltage without failing to open circuit)? Is there any standard models? This could be very useful to design the power supply circuit parts involved in a surge immunity test. Thanks in advance. m.p. - ESAOTE S.p.A. Massimo Polignano Research & Product DevelopmentDesign Quality Control Mngr Via di Caciolle,15tel:+39.055.4229402 I- 50127 Florence fax:+39.055.4223305 e-mail: massimo.polign...@esaote.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" This e-mail has been scanned for all viruses by Star Internet. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk This e-mail has been scanned for all viruses by Star Internet. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk --- 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"
IEC 61000-6-3
I can't find IEC 61000-6-3 on the IEC web site, but it was published many years ago. Could it be under a different numbering scheme? What's interesting is that IEC 61000-6-1 is there as are other parts of the -6 series. Richard Woods Sensormatic Electronics Tyco International --- 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"
GSM EMC Test Specification
Hi Folk I want to know EMC standards and Test specifications of GSM as follow. ■ GSM phone ■ GSM accessory (i.e. Adaptor,Ear phone) If you kow about that,Please let me know. Best regards James.
Re: Resistors pulse loading capabilities
I read in !emc-pstc that Massimo Polignano wrote (in ) about 'Resistors pulse loading capabilities', on Mon, 18 Feb 2002: >Does anybody out of there know what are the methods to evaluate resistors >pulse loading capabilities (maximum peak pulse voltage without failing to >open circuit)? >Is there any standard models? >This could be very useful to design the power supply circuit parts involved >in a surge immunity test. Try IEC60115 (a multi-part standard) and IEC/TR60440. Brief details are available at http://www.iec.ch The specification sheets for metal glaze resistors, such as Philips VR25 and VR37, may be informative. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk After swimming across the Hellespont, I felt like a Hero. 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...@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"
Resistors pulse loading capabilities
Does anybody out of there know what are the methods to evaluate resistors pulse loading capabilities (maximum peak pulse voltage without failing to open circuit)? Is there any standard models? This could be very useful to design the power supply circuit parts involved in a surge immunity test. Thanks in advance. m.p. - ESAOTE S.p.A. Massimo Polignano Research & Product DevelopmentDesign Quality Control Mngr Via di Caciolle,15tel:+39.055.4229402 I- 50127 Florence fax:+39.055.4223305 e-mail: massimo.polign...@esaote.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: IEC 61000-6-3
Thanks to David Spencer who pointed out that the document can be located using the CISPR rather than IEC prefix. > -Original Message- > From: WOODS, RICHARD > Sent: Monday, February 18, 2002 12:46 PM > To: 'emc-pstc' > Subject: IEC 61000-6-3 > > I can't find IEC 61000-6-3 on the IEC web site, but it was published many > years ago. Could it be under a different numbering scheme? What's > interesting is that IEC 61000-6-1 is there as are other parts of the -6 > series. > > > Richard Woods > Sensormatic Electronics > Tyco International > --- 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"