RE: request sources for UL and/or IEC accessibility probe (test finger)
Paul, I have used EDD in the past. http://www.productsafet.com/pages/main.html Regards, Josh Folks What sources are out there to purchase an articulated UL and/or IEC accessibility probe (test finger) from the various UL, IEC and other product safety standards. An example is shown in Annex B of EN61010-1 Thanks for your help. Regards , Paul J Smith Teradyne, Boston 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: request sources for UL and/or IEC accessibility probe (test finger)
You might try EDD at http://www.productsafet.com/pages/main.html Pryor McGinnis paul.j.sm...@teradyne.com wrote: Folks What sources are out there to purchase an articulated UL and/or IEC accessibility probe (test finger) from the various UL, IEC and other product safety standards. An example is shown in Annex B of EN61010-1 Thanks for your help. Regards , Paul J Smith Teradyne, Boston 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.co! mailto:emc-p...@hypercom.com m 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: EN55022:1998 and telecom ports
Richard, In addition to Gherys explanation of the note, there is also the definition itself that inherently excludes certain interfaces by means of the wordings widely dispersed and multi-user. But I agree that adding some more definitions of interfaces would help, also myself. Clause 6.3: Telecommunications port Point of connection for voice , data and signalling transfers intended to connect widely dispersed systems via such means as direct connection to multi-user telecom networks (e.g. PSTN, ISDN, xDSL, LAN (token ring, ethernet, etc) and similar networks. Note A port generally intended for connection of components of an ITE system under test (e.g. RS232, IEEE standard 1284 (parallel printer), USB, IEEE Std 1394 (fire wire) etc) and used in accordance with its functional specifications ( e.g. for the max. length of cable to be connected to it), is not considered to be a telecommunications/network port under this definition Regards, Kris From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: donderdag 30 januari 2003 19:32 To: emc-p...@majordomo.ieee.org Subject: EN55022:1998 and telecom ports EN55022:1998 defines telecommunication ports as Ports which are intended to be connected to telecommunications networks (e.g. public switched telecommunication networks, integrated services digital networks), local area networks (e.g. Ethernet, token ring) and similar networks. Since similar networks are included, it would seem that dissimilar networks are excluded. What distinguishes a similar network to a dissimilar network? What are some examples of dissimilar networks that are not included? 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...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: EN55022:1998 and telecom ports
Gary, Unfortunately, Article 3.6 of CISPR 22:1997 states: 3.6 telecommunication ports Ports which are intended to be connected to telecommunication networks (e.g. public switched telecommunication networks, integrated services digital networks), local area networks (e.g. Ethernet, Token Ring) and similar networks. Ethernet is specifically called out as a telecommunication port in the definition. Rats! Ghery From: Gary McInturff [mailto:gary.mcintu...@worldwidepackets.com] Sent: Thursday, January 30, 2003 2:20 PM To: Pettit, Ghery; richwo...@tycoint.com; emc-p...@majordomo.ieee.org Subject: RE: EN55022:1998 and telecom ports Glad to hear this! Ethernet lines are interconnection of ITE components and not telecommunications cables. Asbestos shorts on - fire away. Gary From: Pettit, Ghery [mailto:ghery.pet...@intel.com] Sent: Thursday, January 30, 2003 10:45 AM To: 'richwo...@tycoint.com'; emc-p...@majordomo.ieee.org Subject: RE: EN55022:1998 and telecom ports Richard, Further clarification to this question was provided by the addition of the following note at the end of article 3.6 of CISPR 22:1997 as part of Amendment 2 which was published in October of last year. NOTE A port generally intended for interconnection of components of an ITE system under test (e.g. RS-232, IEEE Standard 1284 (parallel printer), Universal Serial Bus (USB), IEEE Standard 1394 (Fire Wire), etc.) and used in accordance with its functional specifications (e.g. for the maximum length of cable connected to it), is not considered to be a telecommunications/network port under this definition. I haven't seen an EN version of this amendment yet, but CENELEC should be coming with it one of these days. You can purchase a copy of the entire amendment, which adds information on multifunction equipment, from the IEC web page at http://www.iec.ch . Ghery Pettit Intel From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: Thursday, January 30, 2003 10:32 AM To: emc-p...@majordomo.ieee.org Subject: EN55022:1998 and telecom ports EN55022:1998 defines telecommunication ports as Ports which are intended to be connected to telecommunications networks (e.g. public switched telecommunication networks, integrated services digital networks), local area networks (e.g. Ethernet, token ring) and similar networks. Since similar networks are included, it would seem that dissimilar networks are excluded. What distinguishes a similar network to a dissimilar network? What are some examples of dissimilar networks that are not included? 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...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society 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: EN55022:1998 and telecom ports
Glad to hear this! Ethernet lines are interconnection of ITE components and not telecommunications cables. Asbestos shorts on - fire away. Gary From: Pettit, Ghery [mailto:ghery.pet...@intel.com] Sent: Thursday, January 30, 2003 10:45 AM To: 'richwo...@tycoint.com'; emc-p...@majordomo.ieee.org Subject: RE: EN55022:1998 and telecom ports Richard, Further clarification to this question was provided by the addition of the following note at the end of article 3.6 of CISPR 22:1997 as part of Amendment 2 which was published in October of last year. NOTE A port generally intended for interconnection of components of an ITE system under test (e.g. RS-232, IEEE Standard 1284 (parallel printer), Universal Serial Bus (USB), IEEE Standard 1394 (Fire Wire), etc.) and used in accordance with its functional specifications (e.g. for the maximum length of cable connected to it), is not considered to be a telecommunications/network port under this definition. I haven't seen an EN version of this amendment yet, but CENELEC should be coming with it one of these days. You can purchase a copy of the entire amendment, which adds information on multifunction equipment, from the IEC web page at http://www.iec.ch . Ghery Pettit Intel From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: Thursday, January 30, 2003 10:32 AM To: emc-p...@majordomo.ieee.org Subject: EN55022:1998 and telecom ports EN55022:1998 defines telecommunication ports as Ports which are intended to be connected to telecommunications networks (e.g. public switched telecommunication networks, integrated services digital networks), local area networks (e.g. Ethernet, token ring) and similar networks. Since similar networks are included, it would seem that dissimilar networks are excluded. What distinguishes a similar network to a dissimilar network? What are some examples of dissimilar networks that are not included? 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...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society 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: request sources for UL and/or IEC accessibility probe (test finger)
Folks What sources are out there to purchase an articulated UL and/or IEC accessibility probe (test finger) from the various UL, IEC and other product safety standards. An example is shown in Annex B of EN61010-1 Thanks for your help. Regards , Paul J Smith Teradyne, Boston 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: EN55022:1998 and telecom ports
hu...OK, what about RS-485 and RS-422 ports? Are they similar networks and therefore must be tested as a telecom port or are they dissimilar like RS232? Richard Woods Sensormatic Electronics Tyco International From: Pettit, Ghery [mailto:ghery.pet...@intel.com] Sent: Thursday, January 30, 2003 1:45 PM To: 'richwo...@tycoint.com'; emc-p...@majordomo.ieee.org Subject: RE: EN55022:1998 and telecom ports Richard, Further clarification to this question was provided by the addition of the following note at the end of article 3.6 of CISPR 22:1997 as part of Amendment 2 which was published in October of last year. NOTE A port generally intended for interconnection of components of an ITE system under test (e.g. RS-232, IEEE Standard 1284 (parallel printer), Universal Serial Bus (USB), IEEE Standard 1394 (Fire Wire), etc.) and used in accordance with its functional specifications (e.g. for the maximum length of cable connected to it), is not considered to be a telecommunications/network port under this definition. I haven't seen an EN version of this amendment yet, but CENELEC should be coming with it one of these days. You can purchase a copy of the entire amendment, which adds information on multifunction equipment, from the IEC web page at http://www.iec.ch . Ghery Pettit Intel From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: Thursday, January 30, 2003 10:32 AM To: emc-p...@majordomo.ieee.org Subject: EN55022:1998 and telecom ports EN55022:1998 defines telecommunication ports as Ports which are intended to be connected to telecommunications networks (e.g. public switched telecommunication networks, integrated services digital networks), local area networks (e.g. Ethernet, token ring) and similar networks. Since similar networks are included, it would seem that dissimilar networks are excluded. What distinguishes a similar network to a dissimilar network? What are some examples of dissimilar networks that are not included? 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...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: single fault conditions
While s-c and o-c at device terminals do not simulate true fault conditions within components, testing must be practical. If we are to begin considering simulation of true fault conditions within components, there may be no end to the number of tests. We can easily put bounds on the number of fault-condition tests. First, there are no fault-condition tests for electric shock. The requirements for electric shock presume the failure of basic insulation, so we do not need to fault basic insulation. Second, fire only occurs under fault conditions (a priori). So, we need to introduce those faults likely to cause heating sufficient to raise a fuel material to ignition temperature. Electrical heating occurs in a resistance. So, the faults that should be introduced are those that will produce maximum heating in a specific resistance for a prolonged period of time. This premise requires identification of resistances capable of dissipating enough power for a long enough period of time for ignition of nearby materials. Once this is done, then the faults that are considered are those that will maximize current in the resistances. This process narrows down the number of fault tests to a very reasonable number. (By the way, this process is no different than that for fault testing x-radiation from crts -- only those faults which will maximize the anode voltage are considered.) Best regards, Rich This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: single fault conditions
Sir To paraphrase Mr. Mertinooke (previous post in this thread), my testing also goes way beyond requirments of 950 and 1010-based standards, because these standards have not, and cannot keep up with advances in circuit design and materials technology. As very small, hi power-density (e.g., resonate-mode converters) power supplies become more common, as FETs used in the main and PFC converters become more reliable 70 deg ambient, and as the thermal conductivity of embedded materials increases, standards and associated test conditions must change. I have never seen my employer's designs fail in an unsafe mode in the field; and not necessarily because two or three NCBs/NRTLs/etc said the unit was ok, but because of internal safety testing, conducted outside of the scope of any applicable standard, that revealed the actual (potential) safety hazards. Product Safety Test design resulted from system-level simulation and extremes of differential design equations. I did not consider these tests even more difficult to simulate repeatably. I am concerned that we are wasting our time stressing components that could never fail , other than multiple-fault conditions. I am also concerned that there are products on the market, tested in good faith, that would be unsafe for a more probable SFC, that would not be tested for, in accordance with existing standards. I apreciated you comments, got the grey-matter in motion.. R/S, Brian -Original Message- From: Peter L. Tarver [ mailto:peter.tar...@sanmina-sci.com] Sent: Thursday, January 30, 2003 9:13 AM To: emc-p...@majordomo.ieee.org Subject: RE: single fault conditions While s-c and o-c at device terminals do not simulate true fault conditions within components, testing must be practical. If we are to begin considering simulation of true fault conditions within components, there may be no end to the number of tests. Simulation of internal component faults would not only be difficult to establish, but (as Rich Nute alludes) would be even more difficult to simulate repeatably. Then, even if repeatable, how can one be certain that any particular test condition will impose the worst case effects on both the component and the remainder of the interconnected circuitry, leading to multiple simulated faults on a single component. Repeating for each FET, diode, electrolytic capacitor, etc, alternate component vendors, alternate part nos. from the same vendor (even due to obsolescence), the sale of the week that the purchasing agent just made ... would certainly need to be considered. Better to do the oversimplified testing or products would go end-of-life before abnormal condition testing is completed. Regards, Peter L. Tarver, PE
RE: EN61000-3-2/3 applicability
Sam, Section 5 of EN61000-3-2 lists examples of the environments and a partial listing include houses, shops, offices, cinemas, bars, and workshops. An industrial device that is intended to be used in both an industrial location (i.e., not from the public distribution grid) and in a cinema, for example, would have to comply with EN61000-3-2. Products intended solely for industrial locations and not powered from the public distribution grid (i.e. the grid that powers the listed locations above) do not have to comply with this standard. Richard Woods Sensormatic Electronics Tyco International From: Sam Wismer [mailto:swis...@acstestlab.com] Sent: Wednesday, January 29, 2003 2:43 PM To: EMC Forum Subject: EN61000-3-2/3 applicability The scope of these standards includes all equipment having an input current upto and including 16A per phase and intended to be connected to a public low-voltage distribution systems of between 220V and 250V at 50Hz line to neutral. Does public infer that only consumer goods that use residential service are obligated to these standards or are industrial products used in industrial locations that meet the electrical specifications as identified above also obligated to these standards? Kind Regards, Sam Wismer Engineering Manager ACS, Inc. *Tel: (770) 831-8048 *Fax: (770) 831-8598 *Web: http://www.acstestlab.com www.acstestlab.com mailto:*swis...@acstestlab.com *swis...@acstestlab.com
RE: Circuit Breaker Tripping Dring Fault Tests
John - That impedance value is suprisingly high, but tends to support the contention that the fault current at an outlet will be much lower than was suggested (65kA, which, to me, appeared more like a peak surge current than a fault current). For those interested, below are what the IEC Web Store has to say about IEC 60725. Title: Considerations on reference impedances for use in determining the disturbance characteristics of household appliances and similar electrical equipment Abstract: Records the information that was available and the factors that were taken into account in arriving at the reference impedance of 0.4+ j 0.25 ohm which has been incorporated in IEC 60555. Has the status of a technical report. 0.5 Ohm seems large for a flexible cord. Regards, Peter L. Tarver, PE Product Safety Manager Sanmina-SCI Homologation Services San Jose, CA peter.tar...@sanmina-sci.com -Original Message- From: John Woodgate Sent: Wednesday, January 29, 2003 2:10 PM H'mm. IEC 60725 gives a 'reference impedance' (a sort of weighted average, omitting extreme values) for a 230 V 50 Hz 100 A service-rating household supply as 0.47 ohms at the service entry. Allowing another 0.5 ohms for the mains wiring and the flexible mains lead, we get 230 V and 0.97 ohms at the appliance, giving a prospective short-circuit current of about 240 A. 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: EN55022:1998 + A1:2000
All A suggestion for a ferrite clamping method: You could use the ferrite tiles ( like on a chamber) in a stacked configuration. They have a hole in the middle of them you could use to run a wire through. More or less tiles and you vary attenuation. Tile cost last time I heard was about $10.00 a tile. Dan Anchondo From: Gert Gremmen [mailto:g.grem...@cetest.nl] Sent: Wednesday, January 29, 2003 10:17 PM To: Chris Maxwell; Pettit, Ghery; neve...@attbi.com; emc-p...@majordomo.ieee.org Subject: RE: EN55022:1998 + A1:2000 Clamp attenuation calibration. The calibration proposed in CISPR16 amd to meet the attenuation is peformed using a jig construction of the required lengthe and 2 connectors and a wire trough the clamp. All 50 ohm. The test wire is 4mm diameter and floats at 90 mm above the jig bottom. This way all type of clamps can be tested. Connectors are N-type. The length can be adjusted to the clamp. The jig flanges are 100 x 120 mm For accurate measurement use 2 attentuators of 10 dB at each end. The proposition number is Cispr A 424/CD Attenuation must be better then 15 dB (30 - 1000 MHz) The author forgot to specify in which direction but bidirectional is assumed. The official name is CMAD Common Mode Absorption Device. (before John makes one himself ;)) Regards, Gert Gremmen ce-test, qualified testing Rotterdam, The Netherlands http://www.ce-test.nl From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Chris Maxwell Sent: woensdag 29 januari 2003 21:14 To: Pettit, Ghery; neve...@attbi.com; emc-p...@majordomo.ieee.org Subject: RE: EN55022:1998 + A1:2000 Indeed, a very good point! I wonder what is meant by the 50 Ohm system does that mean a function generator with 50 Ohm output impedance, 50 Ohm cable and a 50 Ohm load? (This could be simulated nicely by connecting a function generator to a 50 Ohm spectrum analyzer input using 50 Ohm cable) If that were the case, then calibration would be relatively easy. If that were the case, then my initial calculation would also have to be adjusted to take into account the total non-ferrite impedance which would be closer to 150 Ohms...Yielding a calculated Zf of 693 Ohms. I previously assumed that a 50Ohm system had a total pre-ferrite impedance of 50 Ohms, which gave me a Zf of 231 Ohms. Of course, the standard says 15dB minimum... so you could just use 1000 Ohms (at all frequencies, remember) and be done with it! It probably still wouldn't cost $300. Before anybody goes out and buys ferrites ala carte, remember; I'm not on any CISPR commitees; I'm just throwing out a little bit of Math and some assumptions and suggesting that this could be done. Chris Maxwell | Design Engineer - Optical Division email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024 NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA web www.nettest.com | tel +1 315 797 4449 | -Original Message- From: Pettit, Ghery [SMTP:ghery.pet...@intel.com] Sent: Wednesday, January 29, 2003 2:09 PM To: Chris Maxwell; Pettit, Ghery; neve...@attbi.com; emc-p...@majordomo.ieee.org Subject: RE: EN55022:1998 + A1:2000 Chris, You can indeed make your own, but my bet is that A2LA or NIST NVLAP inspectors will want to see calibration data, not calculations. Now, if we just had a published calibration technique... Ghery This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our
RE: EN55022:1998 and telecom ports
Richard, Further clarification to this question was provided by the addition of the following note at the end of article 3.6 of CISPR 22:1997 as part of Amendment 2 which was published in October of last year. NOTE A port generally intended for interconnection of components of an ITE system under test (e.g. RS-232, IEEE Standard 1284 (parallel printer), Universal Serial Bus (USB), IEEE Standard 1394 (Fire Wire), etc.) and used in accordance with its functional specifications (e.g. for the maximum length of cable connected to it), is not considered to be a telecommunications/network port under this definition. I haven't seen an EN version of this amendment yet, but CENELEC should be coming with it one of these days. You can purchase a copy of the entire amendment, which adds information on multifunction equipment, from the IEC web page at http://www.iec.ch . Ghery Pettit Intel From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: Thursday, January 30, 2003 10:32 AM To: emc-p...@majordomo.ieee.org Subject: EN55022:1998 and telecom ports EN55022:1998 defines telecommunication ports as Ports which are intended to be connected to telecommunications networks (e.g. public switched telecommunication networks, integrated services digital networks), local area networks (e.g. Ethernet, token ring) and similar networks. Since similar networks are included, it would seem that dissimilar networks are excluded. What distinguishes a similar network to a dissimilar network? What are some examples of dissimilar networks that are not included? 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...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
EN55022:1998 and telecom ports
EN55022:1998 defines telecommunication ports as Ports which are intended to be connected to telecommunications networks (e.g. public switched telecommunication networks, integrated services digital networks), local area networks (e.g. Ethernet, token ring) and similar networks. Since similar networks are included, it would seem that dissimilar networks are excluded. What distinguishes a similar network to a dissimilar network? What are some examples of dissimilar networks that are not included? 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...@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: Country of origin information
Richard, I beg to differ! I have been into this in some detail in the past. The UK position is simple - country of origin information is not required to appear on the product itself, but where it is provided it must be accurate and not misleading. This information will be required for the purposes of customs documents and bills of lading, but it is not required to appear on products when they are presented to consumers. In fact, in Europe, the display of country or origin information is in some cases discouraged since in some cases (especially regarding food) it is seen as a restraint on trade to encourage the purchase of local produce at the expense of produce from other member states. Certainly, this is not permitted at a state level, although I believe that there is little the authorities can do to to prevent individual retailers providing such information to their customers. Regards Nick. At 10:10 -0500 30/1/03, richwo...@tycoint.com wrote: The country of origin marking on a product is a customs requirement in many or most countries. I know for a fact that it is required for imports into the UK. Richard Woods Sensormatic Electronics Tyco International -Original Message- From: Carpentier Kristiaan [mailto:carpenti...@thmulti.com] Sent: Thursday, January 30, 2003 7:37 AM To: emc-p...@majordomo.ieee.org Subject: Country of origin information Hello group, Is there any European or National requirement for IT or telecom products sold in Europe to display the country of origin on the product label or package? Thanks and regards, Kris 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: Unity Power Factor
Yes I am in the US so clearly I must have been mistaken. Seriously, when that business started in 1989 there were relatively few PCs in use there. PC cubes were scattered throughout the building that people could use on an as-needed basis. By 1995, every engineer's cube had a PC running all day long. It would have been interesting, in retrospect, to have taken line voltage oscillographs at representative locations as the PC density increased. From: John Woodgate j...@jmwa.demon.co.uk To: emc-p...@majordomo.ieee.org Subject: Re: Unity Power Factor Date: Wed, Jan 29, 2003, 4:01 PM I read in !emc-pstc that Ken Javor ken.ja...@emccompliance.com wrote (in 0h9h00l4ovp...@mtaout02.icomcast.net) about 'Unity Power Factor' on Wed, 29 Jan 2003: I noticed this several years ago at the office building I worked in at the time. My cube moved from one end of the building to another, and my computer wouldn't always start - it took several tries. I brought in a scope, and saw that the ac voltage waveform was flattened. It was more flattened at my new cube than at my old one. Clearly this is related to power supplies recharging filter caps at the peak of the ac waveform, and the relative distance from the building main breaker at the two different cubes. This is a power/crest factor issue, not directly a harmonic issue, although drawing current only near the peak of the waveform will definitely generate harmonics. Aren't you in the USA? If so, you must have imagined the peak- flattening. I am assured by the US experts on SC77A/WG1 that this phenomenon is unknown in USA, and the only effect of IEC/EN 61000-3-2 is that it increases the prices of PCs dramatically and keeps US products out of Europe. To which my answer is 'McEnroe!' (YCNBS!) At least, they argued that way for about 10 years. The present US chums are far more sensible. Even so, 'peak flattening' rarely figures in their vocabulary. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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: single fault conditions
While s-c and o-c at device terminals do not simulate true fault conditions within components, testing must be practical. If we are to begin considering simulation of true fault conditions within components, there may be no end to the number of tests. Simulation of internal component faults would not only be difficult to establish, but (as Rich Nute alludes) would be even more difficult to simulate repeatably. Then, even if repeatable, how can one be certain that any particular test condition will impose the worst case effects on both the component and the remainder of the interconnected circuitry, leading to multiple simulated faults on a single component. Repeating for each FET, diode, electrolytic capacitor, etc, alternate component vendors, alternate part nos. from the same vendor (even due to obsolescence), the sale of the week that the purchasing agent just made ... would certainly need to be considered. Better to do the oversimplified testing or products would go end-of-life before abnormal condition testing is completed. Regards, Peter L. Tarver, PE Product Safety Manager Sanmina-SCI Homologation Services San Jose, CA peter.tar...@sanmina-sci.com This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: Unity Power Factor
Hi John: Aren't you in the USA? If so, you must have imagined the peak- flattening. I am assured by the US experts on SC77A/WG1 that this phenomenon is unknown in USA, and the only effect of IEC/EN 61000-3-2 is that it increases the prices of PCs dramatically and keeps US products out of Europe. To which my answer is 'McEnroe!' (YCNBS!) At least, they argued that way for about 10 years. The present US chums are far more sensible. Even so, 'peak flattening' rarely figures in their vocabulary. As Ken Javor described, in the USA, voltage distortion is largely a local (privately-owned wiring) premises problem due to excessive series resistance between the load and the point where the utility connects to the local premises wiring. Voltage distortion at the point where the utility (public network) connects to the local premises wiring is rare. As mentioned in another message, the effect of non-linear loads (in the USA) on the utility (public) network is very low due to our use of many small distribution transformers as compared to the large distribution transformers used in Europe. The effects of non-linear loads in the USA are highly localized, and, in commercial and industrial sites, tend to be owned by the site owner. Voltage distortion on utility (public) networks in the USA tends to occur near sites of aluminum smelting and electric blast furnaces. Best regards, Rich This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: Job Opportunity: Software Availability / Reliability Engine er
We have a potential Req for a seasoned Software Reliability Engineer with an VERY STRONG emphasis on large telecom carrier networks. ( ILEC's) Only experienced SW Reliability engineers with a proven track record will be considered. CIENA Career Opportunities We create breakthrough optical networks. So can you, when you work at CIENA. As the leader in intelligent optical networking, we're all about delivering market leadership to our customers. We see ourselves as their partners. Our advanced optical solutions slash the costs of installing, operating and scaling networks. And our state-of-the-art software enables point-and-click, real time provisioning and precise management of customized, high-bandwidth services. In short, we're developing the most sophisticated optical networking solutions on the market today. That creates opportunities and makes for an exciting and challenging environment. Come join us. And build your career in optical networking. Build your optical networking career with the leader. General Position Description __ TITLE: Software Reliability Engineer DIVISION/DEPARTMENT: Core Networking Division, Engineering Software / Hardware LOCATION: Core Networking Division, South San Jose CA. REPORTS TO: Jeff Collins POSITION SUMMARY: Responsible for all Software Reliability/Availability: Prediction, measurement, and improvement for Core Switching Products. Will work with customers, development teams, manufacturing and management to assure customer satisfaction. Will drive the programs across various functional groups and management levels. ESSENTIAL DUTIES AND RESPONSIBILITIES Responsible for: · Customer presentations regarding the SW Quality, SW Reliability, and Availability. · SW Reliability and Availability analysis. · SW Reliability System Analysis on products in development, including Failure Mode and Effects Analysis and System Markov Modeling. · Obtaining six 9's for systems software reliability for our customer networks · Design at a circuit pack level of Fault Insertion modules · SW Field Reliability measurement · SW Reliability Improvement Plans, including trending, problem analysis, and corrective action. . Design in-system diagnostics of the product to better isolate system failures and improve the software response to these failures. SKILLS · Able to lead SW /HW engineers and cross functional teams · Able to plan and manage improvement programs. · Able to analyze complex products for SW Reliability and Availability. DESIRED CHARACTERISTICS · Experience using Bellcore Reliability Documents · Experience using Relex Analysis Software. · Experienced in Customer Presentations EDUCATION / EXPERIENCE · B.S. in Electronic Engineering, Computer Science or Related Field , MS preferred · Minimum of 10 years in SW Reliability Engineering in the Telecommunication industry . Experience with Fault Tolerant system SW such as Tandem Computers is a plus. Please reply via email ( No phone calls ) if you're interested in this position. Jeffrey Collins Sr. HW Engineering Manager EMC/ NEBS/ Reliability/ Safety CIENA Core Switching Division 5965 Silver Creek Valley Rd. San Jose, CA. 95138 (408) 571-3002, Fax (408) 965-2705 jcoll...@ciena.com http://www.ciena.com This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: Country of origin information
The country of origin marking on a product is a customs requirement in many or most countries. I know for a fact that it is required for imports into the UK. Richard Woods Sensormatic Electronics Tyco International From: Carpentier Kristiaan [mailto:carpenti...@thmulti.com] Sent: Thursday, January 30, 2003 7:37 AM To: emc-p...@majordomo.ieee.org Subject: Country of origin information Hello group, Is there any European or National requirement for IT or telecom products sold in Europe to display the country of origin on the product label or package? Thanks and regards, Kris This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: Translations: Chinese to English
Hello Jeffrey, Try the following: http://www.ostrans.com/ I have used them extensively in the past to translate many Chinese and Korean documents into English. Best regards, Ron Wellman At 11:56 PM 1/29/2003 -0800, Collins, Jeffrey wrote: Group, Can you recommend a company or individual who is competent ( and reasonable $$$ ) in translating technical documents from Mandarin Chinese into English. I'm also seeking someone capable of translating technical documents from English to Portuguese or Mandarin Chinese to Portuguese. Preferably looking for a west coast entity but it is not required. Thanks, Jeffrey Collins Sr. HW Engineering Manager EMC/ NEBS/ Reliability/ Safety CIENA Core Switching Division 5965 Silver Creek Valley Rd. San Jose, CA. 95138 (408) 571-3002, Fax (408) 965-2705 jcoll...@ciena.com http://www.ciena.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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: power-line LAN
Hello, They are usually called PLC/PLT Power Line Carrier systems. On the ones I have seen conducted emissions are exempt in the US, carrier current system, and the radiated is usually done at several typical locations (houses). All the manufacturers I have talked to would like to be able to do measurements on a OATs but have not successfully convinced the FCC that it is possible. I have not seen any that meet the CISPR22 conducted emissions limits but they are getting into Europe by way of a TCF. The interference caused by PLC is a HOT topic in Europe - Next week I will attend a CENELEC/ETSI standards meeting where they are coming up with in-situ limits for installations. Regards, Ken From: Hans Mellberg [mailto:emcconsult...@yahoo.com] Sent: Wednesday, January 29, 2003 3:27 PM To: emc-p...@majordomo.ieee.org Subject: power-line LAN What are the unique testing requirements for a power-line based LAN (i.e. the information is transported on the powerlines within a home as an example) for CE mark? Would the power line harmonics be an issue? ANy unique set-up besides a couple of devices exchanging info? Hans Mellberg __ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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: Translations: Chinese to English
Jeffrey: Not West Coast, but worth considering. This was retrieved from my files, I haven't had contact with them for a few years though. Comprehensive Language Center 4200 Wilson Blvd Suite 950 Arlington, VA 22203-1800 (800) 634-5764 Richard Lytle - Dir. of Sales x 709 Regards, Jacob Z. Schanker, P.E. 65 Crandon Way Rochester, NY 14618 Tel: 585 442 3909 Fax: 585 442 2182 j.schan...@ieee.org From: Collins, Jeffrey jcoll...@ciena.com To: emc-p...@majordomo.ieee.org Sent: Thursday, January 30, 2003 2:56 AM Subject: Translations: Chinese to English Group, Can you recommend a company or individual who is competent ( and reasonable $$$ ) in translating technical documents from Mandarin Chinese into English. I'm also seeking someone capable of translating technical documents from English to Portuguese or Mandarin Chinese to Portuguese. Preferably looking for a west coast entity but it is not required. Thanks, Jeffrey Collins Sr. HW Engineering Manager EMC/ NEBS/ Reliability/ Safety CIENA Core Switching Division 5965 Silver Creek Valley Rd. San Jose, CA. 95138 (408) 571-3002, Fax (408) 965-2705 jcoll...@ciena.com http://www.ciena.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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
Country of origin information
Hello group, Is there any European or National requirement for IT or telecom products sold in Europe to display the country of origin on the product label or package? Thanks and regards, Kris 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
Translations: Chinese to English
Group, Can you recommend a company or individual who is competent ( and reasonable $$$ ) in translating technical documents from Mandarin Chinese into English. I'm also seeking someone capable of translating technical documents from English to Portuguese or Mandarin Chinese to Portuguese. Preferably looking for a west coast entity but it is not required. Thanks, Jeffrey Collins Sr. HW Engineering Manager EMC/ NEBS/ Reliability/ Safety CIENA Core Switching Division 5965 Silver Creek Valley Rd. San Jose, CA. 95138 (408) 571-3002, Fax (408) 965-2705 jcoll...@ciena.com http://www.ciena.com This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: UK DTI applying generic standard to test hair dryer for conformity
Hi Paul This topic was covered in some detail in the EMC Compliance Journal by John Woodgate. You can find all the editorial on our web site www.compliance-club.com There were also some postings on this group which will be in the archives. If you would like free copies of Journal either register online or email me direct. Alan E Hutley Editorial Publisher EMC Compliance Journal Secretariat EMCIA nutwoo...@nutwood.eu.com From: Paul Chan ncc...@tuvps.com.hk To: emc-p...@majordomo.ieee.org Sent: Thursday, January 30, 2003 1:47 AM Subject: UK DTI applying generic standard to test hair dryer for conformity Dear subscribers, I have read a news regarding on 3 Sept 02, UK Department of Trade Industry (DTI) applied EMC Generic standard EN50081-1 Radiated Emission to test for compliance on a AC Hair dryer, which claimed to interfere TV reception. The hair dryer failed the test and the importer was prosecuted by violation of EMC Directive. Should the product be covered by EN55014-1 already? Please comment. Regards Paul Chan --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: EN55022:1998 + A1:2000
Clamp attenuation calibration. The calibration proposed in CISPR16 amd to meet the attenuation is peformed using a jig construction of the required lengthe and 2 connectors and a wire trough the clamp. All 50 ohm. The test wire is 4mm diameter and floats at 90 mm above the jig bottom. This way all type of clamps can be tested. Connectors are N-type. The length can be adjusted to the clamp. The jig flanges are 100 x 120 mm For accurate measurement use 2 attentuators of 10 dB at each end. The proposition number is Cispr A 424/CD Attenuation must be better then 15 dB (30 - 1000 MHz) The author forgot to specify in which direction but bidirectional is assumed. The official name is CMAD Common Mode Absorption Device. (before John makes one himself ;)) Regards, Gert Gremmen ce-test, qualified testing Rotterdam, The Netherlands http://www.ce-test.nl From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Chris Maxwell Sent: woensdag 29 januari 2003 21:14 To: Pettit, Ghery; neve...@attbi.com; emc-p...@majordomo.ieee.org Subject: RE: EN55022:1998 + A1:2000 Indeed, a very good point! I wonder what is meant by the 50 Ohm system does that mean a function generator with 50 Ohm output impedance, 50 Ohm cable and a 50 Ohm load? (This could be simulated nicely by connecting a function generator to a 50 Ohm spectrum analyzer input using 50 Ohm cable) If that were the case, then calibration would be relatively easy. If that were the case, then my initial calculation would also have to be adjusted to take into account the total non-ferrite impedance which would be closer to 150 Ohms...Yielding a calculated Zf of 693 Ohms. I previously assumed that a 50Ohm system had a total pre-ferrite impedance of 50 Ohms, which gave me a Zf of 231 Ohms. Of course, the standard says 15dB minimum... so you could just use 1000 Ohms (at all frequencies, remember) and be done with it! It probably still wouldn't cost $300. Before anybody goes out and buys ferrites ala carte, remember; I'm not on any CISPR commitees; I'm just throwing out a little bit of Math and some assumptions and suggesting that this could be done. Chris Maxwell | Design Engineer - Optical Division email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024 NetTest | 6 Rhoads Drive, Utica, NY 13502 | USA web www.nettest.com | tel +1 315 797 4449 | -Original Message- From: Pettit, Ghery [SMTP:ghery.pet...@intel.com] Sent: Wednesday, January 29, 2003 2:09 PM To: Chris Maxwell; Pettit, Ghery; neve...@attbi.com; emc-p...@majordomo.ieee.org Subject: RE: EN55022:1998 + A1:2000 Chris, You can indeed make your own, but my bet is that A2LA or NIST NVLAP inspectors will want to see calibration data, not calculations. Now, if we just had a published calibration technique... Ghery This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: Unity Power Factor
I read in !emc-pstc that Ken Javor ken.ja...@emccompliance.com wrote (in 0h9h00l4ovp...@mtaout02.icomcast.net) about 'Unity Power Factor' on Wed, 29 Jan 2003: I noticed this several years ago at the office building I worked in at the time. My cube moved from one end of the building to another, and my computer wouldn't always start - it took several tries. I brought in a scope, and saw that the ac voltage waveform was flattened. It was more flattened at my new cube than at my old one. Clearly this is related to power supplies recharging filter caps at the peak of the ac waveform, and the relative distance from the building main breaker at the two different cubes. This is a power/crest factor issue, not directly a harmonic issue, although drawing current only near the peak of the waveform will definitely generate harmonics. Aren't you in the USA? If so, you must have imagined the peak- flattening. I am assured by the US experts on SC77A/WG1 that this phenomenon is unknown in USA, and the only effect of IEC/EN 61000-3-2 is that it increases the prices of PCs dramatically and keeps US products out of Europe. To which my answer is 'McEnroe!' (YCNBS!) At least, they argued that way for about 10 years. The present US chums are far more sensible. Even so, 'peak flattening' rarely figures in their vocabulary. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: Circuit Breaker Tripping Dring Fault Tests
I read in !emc-pstc that Peter L. Tarver peter.tar...@sanmina-sci.com wrote (in nebbkemlgllmjofmoplegegaedaa.peter.tar...@sanmina-sci.com) about 'Circuit Breaker Tripping Dring Fault Tests' on Wed, 29 Jan 2003: In a typical household operating at 120V, it's unlikely that a fault current available to Pluggable Equipment Type A will be much above 5kA, even if the outlet supplying the equipment is within 5 ft. of the service entrance. In a typical household operating at 240V, the available fault current will be somewhat higher (approximately doubled +). H'mm. IEC 60725 gives a 'reference impedance' (a sort of weighted average, omitting extreme values) for a 230 V 50 Hz 100 A service-rating household supply as 0.47 ohms at the service entry. Allowing another 0.5 ohms for the mains wiring and the flexible mains lead, we get 230 V and 0.97 ohms at the appliance, giving a prospective short-circuit current of about 240 A. The appliance fuse should be able to interrupt that without exploding. UK plug-top fuses are tested to break 6000 A safely, though. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
