2 Phases in North America
Hi All, Can someone provide an estimate of the percentage of homes and businesses that have 2 phases in Canada and the USA? Also, what is the most common voltage between phases? Thanks and regards Barry Esmore AUS-TICK 281 Lawrence Rd Mt Waverley Vic 3149 Australia Ph: + 61 3 9886 1345 Fax: + 61 3 9884 7272
RE: Enclosed OATS facilities---detour
I have the 'dome' (well, my employer does). Actually, it is an 8 meter dia. radome, white fiberglass throughout. With door, HVAC and rotating floor that serves as ground plane. We pipe in fibre optics for PC host to EUT control from a receiver shelter located 50 meters perpendicular to the elipse. It is part of our $5M facility. It looks like a giant golfball sitting on a large, grounded, concrete pad. -not the sort of place to be in a raging electrical storm... If we could simplify the RE emissions data collection, it would truly be a golden opportunity. Worthy of the expense to upgrade. Would this serve as a really large, spherical GTEM or more like a spherical magnetic field antenna, with the EUT on the INSIDE? Food for patents... Kyle Ehler mailto:kyle.eh...@lsil.com Assistant Design Engineer LSI Logic Corporation 3718 N. Rock Road U.S.A. Wichita, Kansas 67226 Ph. 316 636 8657 Fax 316 636 8889 -Original Message- From: Chris Maxwell [mailto:chris.maxw...@nettest.com] Sent: Wednesday, December 12, 2001 2:46 PM To: geor...@lexmark.com; Patrick Lawler Cc: EMC-PSTC Subject: RE: Enclosed OATS facilities---detour H, This conductive layer of snow reminds me of a daydream/ thought experiment that I had for measuring emissions... What if you put a DUT inside a chamber that looked like a hemisphere. The chamber would be hollow (otherwise, how would the DUT get in). The chamber skin would be a sandwich with a thin layer of absorber on the inside and a good conductor (conductor 1) then a dielectric then another good conductor (conductor 2) on the outside. Why these layers? The inner layer would offer just enough attenuation to reduce reflections, while letting some energy get to the conductor 1 behind it. The conductor 1 layer would effectively be a integrating measurement antenna which picks up and integrates all emissions from the DUT. The dielectric layer would insulate conductor 1 from conductor 2. (maybe this layer would need to be RF absorbant as well, not sure). The conductor 2 layer would be grounded all the way around and would serve to block ambients. What would happen? Would conductor 1 capacitively couple to the DUT such that a simple swept RF voltage measurement between the DUT and conductor 1 would show the total interference produced by the DUT? Who's with me? Let's go to K-mart and get: A large dome tent. About 50 square yards of tin foil Some Tokin flexible ferrite stuff ** A DUT. An RF voltmeter/spectrum analyzer and a stub cable. ** **probably not available at K-mart...maybe Wal-Mart? Might make a fun experiment, or maybe give the neighbors the idea that you're building an escape pod to the mother ship. Any immediate pitfalls that can be foreseen by the collective gurus? 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 | --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
Re: Video averaging
Averaging by convention means an arithmetic average and that by definition means taking all the elements of a set, adding their values together and dividing by the number of elements. That works fine in linear space. If you try that in log space, you get a geometric rather than an arithmetic mean. Adding logs is the same as multiplying, and dividing logs is taking a root, and a geometric mean is the nth root of the product of the n members in a set. Here is a simple example. Let's say there's a broadband signal and the first sweep you get 40 dBuV, and the second time it is 0 dBuV (noise floor). If you perform video averaging in log mode you get a 20 dBuV answer. If you go to linear mode, you get : 0.5* (100 uV + 1 uV) = 50.5 uV = 34 dBuV, a 14 dB difference. on 12/12/01 10:31 PM, KC CHAN [PDD] at kcc...@hkpc.org wrote: Hi all Someone told me that when doing the video averaging(set it small, say 10Hz), you need to use linear scale(uV) instead of log scale(dBuV). What is the reason behind about this? Best Regards KC 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
Re: Motor Noise
Not enough info for me to weigh in with any kind of certainty. I do know from personal experience that if you use solid state switches to control motor operation by applying a pulse train (PWM) rather than continuous voltage control that will generate big spikes as the inductance of the motor opposes the current change inherent in the pulse rise-time. This is mitigated by slowing the rise-times sufficiently that the L di/dt product is manageable. on 12/13/01 9:04 AM, cecil.gitt...@kodak.com at cecil.gitt...@kodak.com wrote: From: Cecil A. Gittens All .. specifically Senior EMC Team Members. I am having a problem on the power control board, in the motor control ckt. when we turn the motors on. This condition creates significant noise spike on my entire ground plane, along with the other power ckts, this needs to be cleaned up for signal integrity issues, even more then EMC reasons at this time. Anyone can feel free to stop in and give me some ideas. Best regards, Cecil --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Components to suppress fast transient / bursts
I suggest you apply self-induction with low parallel capacity such as ferrites before any clamping device. Standard varistors do perform self induction in series with the clamping part. The source impedance of the EFT pulse is 50 Ohm. If your low impedance path to ground is 1 Ohm inductive still 40 volts reside. I can assure you that 1 Ohm to ground sereis impedance at this frequency is NOT an easy target. So first increase the impedance of the EFT pulse as high as physically possible (200-300 Ohms) in the incoming cable/wire and then lead to ground using a low inductace capacitor and varistor. If no impedance is possible use faster devices such as transil (semiconductor) preferably in SMD version to reduce series impedance. Possibly your equipment don't need that much decoupling; just give it a try. uP equipment may be very hard to decouple. Note that relay's and optocouplers are virtually transparent to this pulse... Potential free relay contact outputs are often overlooked. I decoupled thyristor lamp solid state relays using ferrites last year. I needed 4 big ones in series to stop the thyristor from igniting. Need I mention that varistors could not be applied here ? Regards, Gert Gremmen, (Ing) ce-test, qualified testing === Web presence http://www.cetest.nl CE-shop http://www.cetest.nl/ce_shop.htm /-/ Compliance testing is our core business /-/ === -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of am...@westin-emission.no Sent: Wednesday, December 12, 2001 9:51 PM To: emc-p...@majordomo.ieee.org Subject: Components to suppress fast transient / bursts Hi all, I do not have any experience with components which could suppress a 2kV (5ns/50ns) electrical fast transient (Burst). Anybody in the group who could come up with some suggestions ? Best regards Amund Westin,Oslo/Norway --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. attachment: Gert Gremmen.vcf
RE: CFR 21 Sec. 11
Thank You everyone!! I found quite a bit of information on this subject and it was determined that our products are compliant. This is more of a OS and System Administrator file and network security issue than hardware integrity. I think I caused a completion on the sale of 1.5 TB of disk storage products. Not bad for a few minutes work. Thanks again, Kyle Ehler KCØIQE mailto:kyle.eh...@lsil.com Assistant Design Engineer LSI Logic Storage Systems Div. 3718 N. Rock Road U.S.A. Wichita, Kansas 67226 Ph. 316 636 8657 Fax 316 636 8321 -Original Message- From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: Thursday, December 13, 2001 1:10 PM To: keh...@lsil.com Subject: RE: CFR 21 Sec. 11 The CFRs are online at http://www.access.gpo.gov/nara/cfr/cfr-table-search.html -Original Message- From: Ehler, Kyle [mailto:keh...@lsil.com] Sent: Thursday, December 13, 2001 11:02 AM To: 'PSTC list' Subject: CFR 21 Sec. 11 Could someone explain to me or point in the right direction for what CFR 21 Section 11 requirements in a product (such as a disk storage system) for it to be compliant. I think this is about records and electronic signature authentication and has something to do with the FDA (CPG 7153.17). It would seem to be more of an application feature than a hardware requirement? We are caught ignorant on this one and I dont have a copy of the CFR 21, much less CPG 7153.17 (?!). We have found some info, but our layman understanding doesnt answer the question of what/how to comply. Anybody? Respectfully, Kyle Ehler mailto:kyle.eh...@lsil.com Assistant Design Engineer LSI Logic Storage Systems Div. 3718 N. Rock Road U.S.A. Wichita, Kansas 67226 Ph. 316 636 8657 Fax 316 636 8321
Re: Safety interlock
Kim, The 'safest' and sure-proof way of finding out a bona fide safety interlock switch is to ask the manufacturer to provide you with their agency safety test report. If the agency is UL, make sure you ask for the Conditions of Acceptability as well, where UL might place restrictions on use for any particular switch or item. I would not rely on markings alone. taniagr...@msn.com - Original Message - From: Kim Boll Jensen Sent: Wednesday, December 12, 2001 6:27 PM To: EMC-PSTC Subject: Safety interlock Hi all Does anyone know of a marking on a safety interlock switch which is a L in a circle. I'm looking for a switch which are tested for 100.000 cycles and I wander if the L marking was some thing like it (but I doubt). Best regards, Kim Boll Jensen Bolls Raadgivning
RE: Safety interlock
Kim I doubt that the L has anything to do with the 100,000 cycles. You will have to either check the Conditions of acceptability for the switch (or ask you UL engineer he may be able to look it up pretty quickly). Sometimes you can tell directly from the UL online database. Check both the card guide information and then the vendors electronic yellow card there may be markings in them that indicate acceptance to this category. For example if you look at terminal blocks you can use the guide notes to inspect the various vendors model types to see which have been approved for field wiring. Unfortunately, not all CCN's have this level of detail. You'll just have to look and see what is provided. Gary -Original Message- From: Kim Boll Jensen [mailto:kimb...@post7.tele.dk] Sent: Wednesday, December 12, 2001 2:12 PM To: EMC-PSTC Subject: Safety interlock Hi all Does anyone know of a marking on a safety interlock switch whitch is a L in a circle. I'm looking for a switch which are tested for 100.000 cycles and I wander if the L marking was some thing like it (but I doubt). Best regards, Kim Boll Jensen Bolls Raadgivning --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: CFR 21 Sec. 11
Kyle, All of the CFRs are available for free on the web from the U.S. Government. Just go to www.access.gpo.gov/nara/cfr http://www.access.gpo.gov/nara/cfr and you can do a search on CFR 21 and the full text will then be available. Kurt Andrews Compliance Engineer Tracewell Systems, Inc. 567 Enterprise Drive Westerville, Ohio 43081 voice: 614.846.6175 toll free: 800.848.4525 fax: 614.846.7791 http://www.tracewellsystems.com/ http://www.tracewellsystems.com/ -Original Message- From: Ehler, Kyle [mailto:keh...@lsil.com] Sent: Thursday, December 13, 2001 11:02 AM To: 'PSTC list' Subject: CFR 21 Sec. 11 Could someone explain to me or point in the right direction for what CFR 21 Section 11 requirements in a product (such as a disk storage system) for it to be compliant. I think this is about records and electronic signature authentication and has something to do with the FDA (CPG 7153.17). It would seem to be more of an application feature than a hardware requirement? We are caught ignorant on this one and I dont have a copy of the CFR 21, much less CPG 7153.17 (?!). We have found some info, but our layman understanding doesnt answer the question of what/how to comply. Anybody? Respectfully, Kyle Ehler mailto:kyle.eh...@lsil.com mailto:kyle.eh...@lsil.com Assistant Design Engineer LSI Logic Storage Systems Div. 3718 N. Rock Road U.S.A. Wichita, Kansas 67226 Ph. 316 636 8657 Fax 316 636 8321
RTTE Directive
I previously used a Notified Body in the conformity process to the RTTE Directive since only a draft radio standard existed at the time. However, a harmonized standard now exists. I understand that I have two choices: 1) Continue to use the existing Declaration of Conformity to the essential requirements of the RTTE, or 2) Issue a new Declaration in which we declare compliance with the harmonized radio standard and make no mention of the participation of the Notified Body. Is my understanting correct? 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
Re: Components to suppress fast transient / bursts
I've had good results using ferrite cores. They help radiated emissions as well. P.S.: I was surprised to see your location. I'll be coming to your city for the first time on Saturday. This visit caused me to ask the question concerning snow on OATS sites. On Wed, 12 Dec 2001 21:50:35 +0100, am...@westin-emission.no wrote: I do not have any experience with components which could suppress a 2kV (5ns/50ns) electrical fast transient (Burst). Anybody in the group who could come up with some suggestions ? Best regards Amund Westin,Oslo/Norway --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
CFR 21 Sec. 11
Could someone explain to me or point in the right direction for what CFR 21 Section 11 requirements in a product (such as a disk storage system) for it to be compliant. I think this is about records and electronic signature authentication and has something to do with the FDA (CPG 7153.17). It would seem to be more of an application feature than a hardware requirement? We are caught ignorant on this one and I dont have a copy of the CFR 21, much less CPG 7153.17 (?!). We have found some info, but our layman understanding doesnt answer the question of what/how to comply. Anybody? Respectfully, Kyle Ehler mailto:kyle.eh...@lsil.com Assistant Design Engineer LSI Logic Storage Systems Div. 3718 N. Rock Road U.S.A. Wichita, Kansas 67226 Ph. 316 636 8657 Fax 316 636 8321
internal modem
Thanks to the group for the great information. All the responses drew my focus to two primary standards; UL60950 and TIA/EIA/IS-968. After I have had a chance to obtain and review them and to take some of the other suggestions into consideration, I may have additional and more specific questions, but for now, all of you have given me a clear direction to follow. Thanks again. Dan Kinney Horner APG, LLC --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
Motor Noise
From: Cecil A. Gittens All .. specifically Senior EMC Team Members. I am having a problem on the power control board, in the motor control ckt. when we turn the motors on. This condition creates significant noise spike on my entire ground plane, along with the other power ckts, this needs to be cleaned up for signal integrity issues, even more then EMC reasons at this time. Anyone can feel free to stop in and give me some ideas. Best regards, Cecil --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Enclosed OATS facilities in snow country
We plow the snow away from around the building. Unfortunately the building is up on a small rise but it does make it easy to get the snow line below the ground plane. Jim -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Bill Owsley Sent: Wednesday, December 12, 2001 2:10 PM To: geor...@lexmark.com; Patrick Lawler Cc: EMC-PSTC Subject: Re: Enclosed OATS facilities in snow country The IBM Greenock lab had an OATS with a very steep roof line, sharp A frame, and the heat to keep folks warm inside kept the lower edges somewhat free of snow. I don't recall any concerns, because the snow was not on top. - Bill At 01:06 PM 12/12/2001 , geor...@lexmark.com wrote: Once upon a time, before we were spun off from IBM, and I was the EMC manager here, I faintly recall that the IBM Boebligen lab in Germany had an OATS facility. I also faintly recall that snow on the rooftop did impact the measurements needed. Note that OATS structures are normally constructed with non-conductive materials, e.g. wood, plastic, etc. A layer of snow represents a plane of conductive material, albeit not a great conductor. However, these are memories from the distant past. Surely there are some still using OATS facilities where winter snow is a problem. George plawler%west@interlock.lexmark.com (Patrick Lawler) on 12/12/2001 12:40:35 PM Please respond to plawler%west@interlock.lexmark.com (Patrick Lawler) To: EMC-PSTC emc-pstc%ieee@interlock.lexmark.com cc:(bcc: George Alspaugh/Lex/Lexmark) Subject: Enclosed OATS facilities in snow country I saw some photographs of an enclosed OATS facility in an area subject to snow. How does snow accumulation on the roof affect performance measurements? Does it affect the NSA figures? Is the effect significant enough that attempts are made to keep the roof snow free? Or does the normal attempt at keeping the inside test area warm enough for people take care of snow build-up? --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. Bill Owsley, ows...@cisco.com 919) 392-8341 Compliance Engineer Cisco Systems 7025 Kit Creek Road POB 14987 RTP. NC. 27709 --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave 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: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: internal modem
Keep in mind that UL1459 is obsolete. The overvoltage testing is now covered in UL60950. Regards, Alex McKinney Safety Engineer LXE, Inc. Tel: 770-447-4224 x3606 Fax: 770-447-6928 -Original Message- From: David Spencer [mailto:dspen...@oresis.com] Sent: Wednesday, December 12, 2001 1:08 PM To: 'Dan Kinney (A)'; EMC-PSTC (E-mail 2) Subject: RE: internal modem Hi Dan, You will need part 68 testing for US. A fairly large number of labs do this now. The requirement to file for a license has been simplified in the last couple of years. Make sure the design team knows that they must pass the key tests: The 600V AC power cross test (UL1459) and the metallic/longitudinal surges (Part 68). The surge testing requires the modem survive the low current stress without damage and that under no circumstances will a damaged modem ever hold the line off hook. It is very difficult to pull this off without a fuse element and it is a bit of a juggling match to make sure that the fuse and crowbar device work together to meet the criteria. If you want to sell in Canada, you will need to file for an Industry Canada registration number and provide the appropriate French text in your manual. The same lab that does you Part 68 should be able to handle this for you. Good Luck! Dave Spencer Oresis Communications -Original Message- From: Dan Kinney (A) [mailto:dan.kin...@heapg.com] Sent: Wednesday, December 12, 2001 7:25 AM To: Emc-Pstc (E-mail) Subject: internal modem Good morning group and Happy Holidays, We are venturing into new territory and I need to accomplish the necessary regulatory work. We intend to build a 2400 Baud telephone modem into a new ISM product. We will conduct all tests for ISM applicable to our product line, including FCC Part 15 and UL 508 and UL1604, but we are unfamiliar with telephone line connectivity. Can anyone tell me what FCC or other requirements will need to be met for sale of this product in the U.S.; no intention at this time to sell outside the U.S. Thanks Dan Kinney Horner APG, LLC Indianapolis, IN --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Australian Regulations Revision
To clarify John's comment, this is only in relation to EMC regulation. Many changes have been implemented - in NZ on 12 Oct 2001 and in Australia on 7 Dec 2001. Some of these changes include: - a fundamental change to close a loop-hole which excluded any equipment being hired/leased; - the inclusion of some battery devices which were previously excluded; - the explicit recognition of many CISPR, IEC, EN EMC standards and the ability to now sign a Declaration of Conformity (DoC) stating compliance with those standards whereas before compliance was required to the Australia/NZ equivalents and the DoC had to be signed to the Australian/NZ equivalents; and - probably most significantly, the signing of an MRA between Australia and NZ in late Nov 2001 which allows for compliance action taken in either Australia or NZ in relation to EMC being accepted as acceptable for both countries so that a single product Compliance Folder and DoC can be kept in either country and recognised in both. Obviously, as we are all compliance people, we all know that it is not quite as simple as it sounds from these few words but you get the gist. Best regards, Kevin Richardson Stanimore Pty Limited Compliance Advice Solutions for Technology (Legislation/Regulations/Standards) Ph: 02-4329-4070 (Int'l: +61-2-4329-4070) Fax: 02-4328-5639 (Int'l: +61-2-4328-5639) Mobile: 04-1224-1620 (Int'l: +61-4-1224-1620) Email:k...@compuserve.com (kevin.richard...@ieee.org - alternate email) The material transmitted in this message or contained in attachments to this message may contain confidential and/or privileged material and is intended only for the addressee. Any use of or reliance upon this material by persons or entities other than the addressee is prohibited. If you receive this in error, please notify the sender and destroy any copies of the material immediately. -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Mowbray, John H Sent: Sunday, 2 December 2001 6:18 AM To: 'EMC-PSTC' Subject: Australian Regulations Revision Although the comment period closed in October, you should be aware that Australian (and New Zealand) are in the process of adopting IEC, CISPR, and EN Standards, in general with a 2 year transition from the date of publication of the latest revision. For more information you should visit the Australian Communications Authority, or New Zealand Radio Frequency Agency web-site. John Mowbray NCR Canada --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Old Australian Safety Standard
Tony, Sorry not to have replied before now. Have been engrossed in other things and not able to respond to newsgroup mail for about 2 weeks. Not sure of the actual number of the Australian standard at the time however it was based on IEC 435 for data processing equipment and IEC 380 for office type equipment (typewriters etc). Will try to dig up the numbers for you. do you have a particular reason for this interest? Telecommunications equipment (at that time only modems and LIUs - Line Isolation Units) were required to comply with the then Telecom Australia Specification 1302. Best regards, Kevin Richardson Stanimore Pty Limited Compliance Advice Solutions for Technology (Legislation/Regulations/Standards) Ph: 02-4329-4070 (Int'l: +61-2-4329-4070) Fax: 02-4328-5639 (Int'l: +61-2-4328-5639) Mobile: 04-1224-1620 (Int'l: +61-4-1224-1620) Email:k...@compuserve.com (kevin.richard...@ieee.org - alternate email) The material transmitted in this message or contained in attachments to this message may contain confidential and/or privileged material and is intended only for the addressee. Any use of or reliance upon this material by persons or entities other than the addressee is prohibited. If you receive this in error, please notify the sender and destroy any copies of the material immediately. -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of tony.reyno...@pb.com Sent: Wednesday, 28 November 2001 2:56 AM To: emc-p...@ieee.org Subject: Old Australian Safety Standard Hi, When testing in the UK was being done to BS5850:1981 (amended 1985) what was the standard being used in Australia for IT safety. I hope someone can remember. Thanks Tony Reynolds Principal Compliance Engineer Pitney Bowes Ltd --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Components to suppress fast transient / bursts
Hi Amund, A properly sized varistor ( sometimes with capacitor in parallel) is quite effective. You will find IEC 1000-4-4 mentioned in some varistor datasheets. Just mind that you have the energy rating correctly specified and for really high speed response, opt for surface mount. The varistors have a parameter called the clamping voltage and you need to be careful that all your protected front end is rated to at least that voltage. Varistor sources include ( I think) EPCOS, Keko-Varicon, Murata, Littelfuse, TDK components, Panasonic etc. You can opt for tranzorbs from the likes of General Semi (Vishay), ST Microelectronics etc for tighter clamping voltages but these are semiconductor types and tend to 'break' when subjected to high energy transients like the surge (EN 610004-5) or automotive load dumps (ISO 7637-1, 2 Test pulse 5). Regards - Chris -Original Message- From: am...@westin-emission.no [SMTP:am...@westin-emission.no] Sent: Wednesday, December 12, 2001 8:51 PM To: emc-p...@majordomo.ieee.org Subject:Components to suppress fast transient / bursts Hi all, I do not have any experience with components which could suppress a 2kV (5ns/50ns) electrical fast transient (Burst). Anybody in the group who could come up with some suggestions ? Best regards Amund Westin,Oslo/Norway --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. _ This message has been checked for all known viruses by Star Internet delivered through the MessageLabs Virus Scanning Service. For further information visit http://www.star.net.uk/stats.asp or alternatively call Star Internet for details on the Virus Scanning Service. _ This message has been checked for all known viruses by Star Internet delivered through the MessageLabs Virus Scanning Service. For further information visit http://www.star.net.uk/stats.asp or alternatively call Star Internet for details on the Virus Scanning Service. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
AW: ISO 1043-1 to 1043-4
Look at http://www.iso.ch/iso/en/stdsdevelopment/tc/tclist/TechnicalCommitteeStandar dsListPage.TechnicalCommitteeStandardsList?COMMID=1993 -Ursprüngliche Nachricht- Von: Boonstra, Tim [mailto:tboons...@4benchmark.com] Gesendet: Mittwoch, 12. Dezember 2001 17:24 An: Major Domo (E-mail) Betreff: ISO 1043-1 to 1043-4 Gentlemen, Can anyone provide info about ISO 1043. We have been asked by a Swedish entity to mark the plastic parts in our product per ISO 1043-1 thru 1043-4. Regards, Tim Tim Boonstra Manager of Supplier Quality Benchmark Storage Innovations ? 3122 Sterling Circle Boulder Colorado 80301 ph: 720-406-5103 Fax: 720-406-5071 --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
Video averaging
Hi all Someone told me that when doing the video averaging(set it small, say 10Hz), you need to use linear scale(uV) instead of log scale(dBuV). What is the reason behind about this? Best Regards KC 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
Re: Sometimes product safety just isn't enough
Now we should understand why some agencies have these crazy instructions that overstate the obvious-- do not use while in the bathtub taniagr...@msn.com - Original Message - From: Robert Johnson Sent: Wednesday, December 12, 2001 11:11 AM To: emc-p...@majordomo.ieee.org Subject: Sometimes product safety just isn't enough I couldn’t help passing on this reference to a bit of unforeseeable misuse. http://electrical-contractor.net/ubb/Forum4/HTML/48.html Bob Johnson
