Re: DSL Modems
In a message dated 9/17/2002, Rob Keller writes: > So, because of the ring signals, which would exceed the > limits of SELV, connecting to the input the modem, should the > classification be TNV-3. Hi Rob: If the tip/ring pair that the DSL modem interfaces to has power ringing on it (such as for an ADSL modem used on a standard POTS line), the classification would certainly be TNV-3. It really doesn't matter that the DSL modem does not use the ring signal. What matters is that the signal is present. Note that some DSL modems (HDSL, SHDSL) operate on lines that do not have power ringing. For these applications, the typical classification is TNV-1. Joe Randolph Telecom Design Consultant Randolph Telecom, Inc. 781-721-2848 http://www.randolph-telecom.com
RE: EMC Chamber Relocation
We thought about buying used chamber rather than moving ours. However, we found the cost of a used chamber including the installation cost was such that we would have rather bought a new one. Richard Woods Sensormatic Electronics Tyco International -Original Message- From: Pettit, Ghery [mailto:ghery.pet...@intel.com] Sent: Tuesday, September 17, 2002 4:19 PM To: 'Hans Mellberg'; Judy Johnson; richwo...@tycoint.com; emc-p...@majordomo.ieee.org Subject: RE: EMC Chamber Relocation Hans, Heck, that HP chamber is only 20 years old! Just getting broken in! Ghery Pettit -Original Message- From: Hans Mellberg [mailto:emcconsult...@yahoo.com] Sent: Tuesday, September 17, 2002 1:04 PM To: Judy Johnson; richwo...@tycoint.com; emc-p...@majordomo.ieee.org Subject: Re: EMC Chamber Relocation You don't say where you are since it may impact the delivered cost but, rumour has it that the HP Cupertino Chamber may be dismantled as NSD has been "absorbed, obviated or retired (pick your own euphemism!)" by the Compaq group in Austin/Cupertino and besides, the Compaq Cupertino site is newer and more modern. Hans --- Judy Johnson wrote: > > Hello Richard, All, > > Does anybody know know of any labs or companies looking to get rid of some > ferrite tiles/panels? > > Judy Johnson > > - Original Message - > From: > To: > Sent: Tuesday, September 17, 2002 8:24 AM > Subject: RE: EMC Chamber Relocation > > > > > > Jeff, we moved our chamber several times and had someone different do it > > each time based upon lowest quote. Some of your panels could be > accidentally > > damaged during the move. We had some panels starting to separate due to > > moisture. Most were salvageable, however. Also, we found some corroded > parts > > that needs to be replaced. We buffed up some panels and some frame members > > and reused them since we did not need more than 80 db isolation from our > > chamber which is about what we got afterwards. If you need more > issolation, > > plan on replacing the corroded parts. We moved the chamber for about $4K. > > > > Now for the disaster story. We moved a compact immumity chamber. We > > contracted through a familiar company from whom we purchased the chamber > and > > test equipment - a turn key installation. That company contacted the move > to > > the chamber manufacturer. The move went well, but the recallibration did > > not. It is now 6 months later and the chamber is still out of calibration > > with all three parties squabling. I don't recommend going this route. > > > > Richard Woods > > Sensormatic Electronics > > Tyco International > > > > > > -Original Message- > > From: Collins, Jeffrey [mailto:jcoll...@ciena.com] > > Sent: Monday, September 16, 2002 3:10 PM > > To: emc-p...@majordomo.ieee.org > > Subject: EMC Chamber Relocation > > > > > > > > Hello Group, > > > > > > We are considering relocating our 3 meter EMC chamber. Can you: > > > > * Recommend a company that is proficient at this and will work in the Bay > > Area ( San Jose / San Francisco CA) > > > > * Give estimated costs > > > > * Share things to watch out for > > > > * Things you would do different the next time. > > > > * Give your experiences/opinion on Relocating chambers vs. Building a new > > one > > > > > > > > Thanks, > > > > > > Jeffrey Collins > > Sr. HW Engineering Manager > > EMC/ NEBS/ Reliability/ Safety > > CIENA Core Switching Division > > 10480 Ridgeview Court, Cupertino, CA. 95014 > > (408) 366-4806, Fax (408) 366-4867 > > 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 > > > > All emc-pstc postings are archived and searchable on the web at: > > http://ieeepstc.mindcruiser.com/ > > Click on "browse" and then "emc-pstc mailing list" > > > > --- > > This message is from the IEEE EMC Society Product Safety > > Technical Committee emc-pstc discussion list. > > > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > > > To cancel your subscription, send mail to: > > majord...@ieee.org > > with the single line: > > unsubscribe emc-pstc > > > > For help, send mail to the list administrators: > > Ron Pickard: emc-p...@hypercom.com > > Dave Heald: davehe...@attbi.com > > >
DSL Modems
Greetings all, Question regarding the classification of DSL modems. DSL modems connect to the standard telecom network yet they do not require a ring signal or go on/off hook, therefore the classification would be TNV-1. Yet there are ring signals still present on the telecom lines for the the other equipment. So, because of the ring signals, which would exceed the limits of SELV, connecting to the input the modem, should the classification be TNV-3. Any insight would be greatly appreciated. Rob Keller Product Safety Engineer Communication Certification Laboratory r...@cclab.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
Re: CE Marking for Passive speakers
I read in !emc-pstc that Tyra, John wrote (in <418fbd441c22d5118d860003470d43160543e...@cupid.bose.com>) about 'CE Marking for Passive speakers' on Tue, 17 Sep 2002: >I was wondering if anyone out there can provide me with help in determining >whether passive speakers and headphones are required to be CE-Marked for >entry into the EU? Yes, they are. > >We have an old document from BAPT in Germany which implies that passive >speakers are required to be CE Marked but this does not seem to make sense >to me since there are no active components in the products and we would be >declaring compliance by default. I have the same concern for Headphones. The absence of active components is irrelevant. The EMC and Low Voltage Directives apply. > >Also does anyone have a good contact person in the EU possibly with the >European Commission they could share I would like to try to get some kind of >official ruling on this issue. It's already established. You don't need a 'golden word'. > >While it would be simple to CE-Mark our passive speaker products there are >costs involved so I would prefer not to do it if it is not required. What cost? You can self-certify. If the loudspeaker magnets are not shrouded, you should put in the user instructions something like: 'Keep this product at least 30 cm from items sensitive to magnetic fields, such as magnetic discs and cathode ray tubes.' -- 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
RE: EMC Chamber Relocation
Hans, Heck, that HP chamber is only 20 years old! Just getting broken in! Ghery Pettit -Original Message- From: Hans Mellberg [mailto:emcconsult...@yahoo.com] Sent: Tuesday, September 17, 2002 1:04 PM To: Judy Johnson; richwo...@tycoint.com; emc-p...@majordomo.ieee.org Subject: Re: EMC Chamber Relocation You don't say where you are since it may impact the delivered cost but, rumour has it that the HP Cupertino Chamber may be dismantled as NSD has been "absorbed, obviated or retired (pick your own euphemism!)" by the Compaq group in Austin/Cupertino and besides, the Compaq Cupertino site is newer and more modern. Hans --- Judy Johnson wrote: > > Hello Richard, All, > > Does anybody know know of any labs or companies looking to get rid of some > ferrite tiles/panels? > > Judy Johnson > > - Original Message - > From: > To: > Sent: Tuesday, September 17, 2002 8:24 AM > Subject: RE: EMC Chamber Relocation > > > > > > Jeff, we moved our chamber several times and had someone different do it > > each time based upon lowest quote. Some of your panels could be > accidentally > > damaged during the move. We had some panels starting to separate due to > > moisture. Most were salvageable, however. Also, we found some corroded > parts > > that needs to be replaced. We buffed up some panels and some frame members > > and reused them since we did not need more than 80 db isolation from our > > chamber which is about what we got afterwards. If you need more > issolation, > > plan on replacing the corroded parts. We moved the chamber for about $4K. > > > > Now for the disaster story. We moved a compact immumity chamber. We > > contracted through a familiar company from whom we purchased the chamber > and > > test equipment - a turn key installation. That company contacted the move > to > > the chamber manufacturer. The move went well, but the recallibration did > > not. It is now 6 months later and the chamber is still out of calibration > > with all three parties squabling. I don't recommend going this route. > > > > Richard Woods > > Sensormatic Electronics > > Tyco International > > > > > > -Original Message- > > From: Collins, Jeffrey [mailto:jcoll...@ciena.com] > > Sent: Monday, September 16, 2002 3:10 PM > > To: emc-p...@majordomo.ieee.org > > Subject: EMC Chamber Relocation > > > > > > > > Hello Group, > > > > > > We are considering relocating our 3 meter EMC chamber. Can you: > > > > * Recommend a company that is proficient at this and will work in the Bay > > Area ( San Jose / San Francisco CA) > > > > * Give estimated costs > > > > * Share things to watch out for > > > > * Things you would do different the next time. > > > > * Give your experiences/opinion on Relocating chambers vs. Building a new > > one > > > > > > > > Thanks, > > > > > > Jeffrey Collins > > Sr. HW Engineering Manager > > EMC/ NEBS/ Reliability/ Safety > > CIENA Core Switching Division > > 10480 Ridgeview Court, Cupertino, CA. 95014 > > (408) 366-4806, Fax (408) 366-4867 > > 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 > > > > All emc-pstc postings are archived and searchable on the web at: > > http://ieeepstc.mindcruiser.com/ > > Click on "browse" and then "emc-pstc mailing list" > > > > --- > > This message is from the IEEE EMC Society Product Safety > > Technical Committee emc-pstc discussion list. > > > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > > > To cancel your subscription, send mail to: > > majord...@ieee.org > > with the single line: > > unsubscribe emc-pstc > > > > For help, send mail to the list administrators: > > Ron Pickard: emc-p...@hypercom.com > > Dave Heald: davehe...@attbi.com > > > > For policy questions, send mail to: > > Richard Nute: ri...@ieee.org > > Jim Bacher: j.bac...@ieee.org > > > > All emc-pstc postings are archived and searchable on the web at: > > http://ieeepstc.mindcruiser.com/ > > Click on "browse" and then "emc-pstc mailing list" > > > > > --- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site
Re: EMC Chamber Relocation
You don't say where you are since it may impact the delivered cost but, rumour has it that the HP Cupertino Chamber may be dismantled as NSD has been "absorbed, obviated or retired (pick your own euphemism!)" by the Compaq group in Austin/Cupertino and besides, the Compaq Cupertino site is newer and more modern. Hans --- Judy Johnson wrote: > > Hello Richard, All, > > Does anybody know know of any labs or companies looking to get rid of some > ferrite tiles/panels? > > Judy Johnson > > - Original Message - > From: > To: > Sent: Tuesday, September 17, 2002 8:24 AM > Subject: RE: EMC Chamber Relocation > > > > > > Jeff, we moved our chamber several times and had someone different do it > > each time based upon lowest quote. Some of your panels could be > accidentally > > damaged during the move. We had some panels starting to separate due to > > moisture. Most were salvageable, however. Also, we found some corroded > parts > > that needs to be replaced. We buffed up some panels and some frame members > > and reused them since we did not need more than 80 db isolation from our > > chamber which is about what we got afterwards. If you need more > issolation, > > plan on replacing the corroded parts. We moved the chamber for about $4K. > > > > Now for the disaster story. We moved a compact immumity chamber. We > > contracted through a familiar company from whom we purchased the chamber > and > > test equipment - a turn key installation. That company contacted the move > to > > the chamber manufacturer. The move went well, but the recallibration did > > not. It is now 6 months later and the chamber is still out of calibration > > with all three parties squabling. I don't recommend going this route. > > > > Richard Woods > > Sensormatic Electronics > > Tyco International > > > > > > -Original Message- > > From: Collins, Jeffrey [mailto:jcoll...@ciena.com] > > Sent: Monday, September 16, 2002 3:10 PM > > To: emc-p...@majordomo.ieee.org > > Subject: EMC Chamber Relocation > > > > > > > > Hello Group, > > > > > > We are considering relocating our 3 meter EMC chamber. Can you: > > > > * Recommend a company that is proficient at this and will work in the Bay > > Area ( San Jose / San Francisco CA) > > > > * Give estimated costs > > > > * Share things to watch out for > > > > * Things you would do different the next time. > > > > * Give your experiences/opinion on Relocating chambers vs. Building a new > > one > > > > > > > > Thanks, > > > > > > Jeffrey Collins > > Sr. HW Engineering Manager > > EMC/ NEBS/ Reliability/ Safety > > CIENA Core Switching Division > > 10480 Ridgeview Court, Cupertino, CA. 95014 > > (408) 366-4806, Fax (408) 366-4867 > > 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 > > > > All emc-pstc postings are archived and searchable on the web at: > > http://ieeepstc.mindcruiser.com/ > > Click on "browse" and then "emc-pstc mailing list" > > > > --- > > This message is from the IEEE EMC Society Product Safety > > Technical Committee emc-pstc discussion list. > > > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > > > To cancel your subscription, send mail to: > > majord...@ieee.org > > with the single line: > > unsubscribe emc-pstc > > > > For help, send mail to the list administrators: > > Ron Pickard: emc-p...@hypercom.com > > Dave Heald: davehe...@attbi.com > > > > For policy questions, send mail to: > > Richard Nute: ri...@ieee.org > > Jim Bacher: j.bac...@ieee.org > > > > All emc-pstc postings are archived and searchable on the web at: > > http://ieeepstc.mindcruiser.com/ > > Click on "browse" and then "emc-pstc mailing list" > > > > > --- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: emc-p...@hypercom.com > Dave Heald: davehe...@
RE: Acousic Noise from ITE
ETSI 300 019-1-3 AND Telcordia NEBS GR-63-CORE are standards that I've had to deal with. ETSI's requirements are considerably more stringent, and are quoted in bels which is a sound power (normalized to 1m^2) independent of distance. GR-63 measures sound pressure at a specified distance (0.6m from face and 1.5m height). This must be converted to sound power. Additionally, there's a 3dB factor that must be included in the calculation to account for statistical variations in manufacture. I know of some co-relation factors and a rule of thumb between measurements called for in the two standards. Paul Dobrovolny Dobro Technical Services (613) 828-7080 paul_dobrovo...@sympatico.ca -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Naftali Shani Sent: Tuesday, September 17, 2002 8:36 AM To: 'richwo...@tycoint.com' Cc: 'emc-p...@majordomo.ieee.org' Subject: RE: Acousic Noise from ITE Found in my dusty folder of seldom-used standards: ETS 300 753: October 1997 (Equipment Engineering; Acoustic noise emitted by telecommunication equipment) Is references: 1. ISO 7779 2. ISO 9296 3. ETS 300 019-1 (1994) 4. EEC directive 86/188/EEC 5. ETR 116 (1994) 6. ECMA TR/27 Call me if you need more information. Regards, Naftali Shani, Catena Networks (www.catena.com) 307 Legget Drive, Ottawa, Ontario, Canada K2K 3C8 613.599.6430/866.2CATENA (X.8277); C 295.7042; F 599.0445 E-mail: nsh...@catena.com -Original Message- From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: Monday, September 16, 2002 11:44 AM To: emc-p...@majordomo.ieee.org Subject:Acousic Noise from ITE Are there any EU or national (e.g. GS) normative requirements to comply with any of the following standards or any other acoustic standards for ITE? > EN27779 Acoustic measurement of airborn noise emitted by computer and > business equipment. > EN29295 Acoustic measurement of high frequency noise emitted by computer > and business equipment. > ISO 9296 Acoustics declared noise emission values of emitted by computer > and business equipment. > > 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
RE: CE Marking for Passive speakers
Hi John, Officially this type of "apparatus" does not qualify for ce marking due to the reasons you gave. Commercial reasons make that most product of this type in Europe ARE ce marked. To my knowledge none was prosecuted for illegal use of the ce mark. What the ce mark implies is thet you declare that your product complies with essential safety requirements in normal use and foreseeable misuse, as well as protects the radio spectrum. Basically all you need to declare compliance is to do an assesment of it's eligibility for ce marking according to the directive's most probable: the EMC directive and the LVD directive. Both refer to standards, that will list requirements that a passive device (unless high voltages are involved) will comply to due to it's physical properties. No tests required thus. [blatant ad: don't read] We do such assignments regularly, at an almost symbolic fee. You may adhere the ce mark to your product and prevent most confusion at customs, customers and the retail network. If you believe we may be helpfull contact me at g.grem...@cetest.nl or hit reply (not reply all !) [end of ad] Regards, Gert Gremmen ce-test, qualified testing -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Tyra, John Sent: dinsdag 17 september 2002 18:48 To: emc-p...@ieee.org Subject: CE Marking for Passive speakers Hello everyone, I was wondering if anyone out there can provide me with help in determining whether passive speakers and headphones are required to be CE-Marked for entry into the EU? We have an old document from BAPT in Germany which implies that passive speakers are required to be CE Marked but this does not seem to make sense to me since there are no active components in the products and we would be declaring compliance by default. I have the same concern for Headphones. Also does anyone have a good contact person in the EU possibly with the European Commission they could share I would like to try to get some kind of official ruling on this issue. While it would be simple to CE-Mark our passive speaker products there are costs involved so I would prefer not to do it if it is not required. Thanks in advance for any help you can provide. Best regards, John John Tyra Design Assurance Engineering, Product Safety & Regulatory Manager Bose Corporation The Mountain, M.S.-450 Framingham, MA 01701-9168 508-766-1502 Phone 508-766-1145 Fax john_t...@bose.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
RE: EMC Chamber Relocation
When relocating any chamber: mark all panels accordingly and make sure you assemble them in the place as they were mounted originally ! - If the original chmaber was placed on a flattened surface, make sure that the new location is equally flat. This is true for the opposite too, but difficult to realize ;<)) - Never move a chamber that was placed on an uneven surface ! - Be ware of any humidity in the soil Gert Gremmen ce-test, qualified testing -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Darrell Locke Sent: dinsdag 17 september 2002 19:15 To: emc-p...@majordomo.ieee.org Cc: Jim Tsadilas Subject: RE: EMC Chamber Relocation Rich, Great info that is very timely for me as I am looking purchasing and relocating a used chamber. Any other tips on what to look for (i.e. corroded joints) from group members would be very helpful. Darrell Locke Advanced Input Devices -Original Message- From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: Tuesday, September 17, 2002 5:25 AM To: emc-p...@majordomo.ieee.org Subject: RE: EMC Chamber Relocation Jeff, we moved our chamber several times and had someone different do it each time based upon lowest quote. Some of your panels could be accidentally damaged during the move. We had some panels starting to separate due to moisture. Most were salvageable, however. Also, we found some corroded parts that needs to be replaced. We buffed up some panels and some frame members and reused them since we did not need more than 80 db isolation from our chamber which is about what we got afterwards. If you need more issolation, plan on replacing the corroded parts. We moved the chamber for about $4K. Now for the disaster story. We moved a compact immumity chamber. We contracted through a familiar company from whom we purchased the chamber and test equipment - a turn key installation. That company contacted the move to the chamber manufacturer. The move went well, but the recallibration did not. It is now 6 months later and the chamber is still out of calibration with all three parties squabling. I don't recommend going this route. Richard Woods Sensormatic Electronics Tyco International -Original Message- From: Collins, Jeffrey [mailto:jcoll...@ciena.com] Sent: Monday, September 16, 2002 3:10 PM To: emc-p...@majordomo.ieee.org Subject: EMC Chamber Relocation Hello Group, We are considering relocating our 3 meter EMC chamber. Can you: * Recommend a company that is proficient at this and will work in the Bay Area ( San Jose / San Francisco CA) * Give estimated costs * Share things to watch out for * Things you would do different the next time. * Give your experiences/opinion on Relocating chambers vs. Building a new one Thanks, Jeffrey Collins Sr. HW Engineering Manager EMC/ NEBS/ Reliability/ Safety CIENA Core Switching Division 10480 Ridgeview Court, Cupertino, CA. 95014 (408) 366-4806, Fax (408) 366-4867 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For he
RE: thermocouple welder
All, Do not look at the spark without eye protection. Rocky -)-(- Kenneth P. Gonzalez (Rocky) Intergraph Solutions Group Integrated Products Division 170 Graphics Drive Madison, Alabama, USA 35758 phone (256) 730-2131 fax (256)730-2424 kpgon...@ingr.com -Original Message- From: Doug McKean [mailto:dmck...@corp.auspex.com] Sent: Tuesday, September 17, 2002 1:59 PM To: Emc-Pstc Post Subject: Re: thermocouple welder Yes. Get a good beefy DC power supply. Attach both leads of the thermocouple to one of the outputs PLUS or MINUS. Doesn't matter. Twist together the leads to be welded. Get a piece of lead that's used in drafters pencils. Attach this piece of lead to the other output of the power supply. Turn on the power supply. LIGHTLY and QUICKLY touch the twisted leads of the thermocouple to the lead a few times. Welding will commence. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
RE: thermocouple welder
If you want an NB to accept your test data, at least one agency engineer has recommended this model: http://www.therm-x.com/Product.asp?Param1=258B&Param2=5 If you do not have 1300+ USD in your budget, a simple cap-discharge welder is easy to build, but requires that you do the "uncertainty dance", to comply w/ISO 17025. Brian -Original Message- From: Brian McAuliffe [mailto:i...@mcac.ie] Sent: Tuesday, September 17, 2002 8:14 AM To: Emc-Pstc Post Subject: thermocouple welder any recommendations for a fine-wire thermocouple tip welder ? Brian Brian McAuliffe MCA Compliance Solutions Ltd Unit 2 Lissane Business Park|Clarecastle|Co.Clare|Ireland w: www.mcac.ie e: i...@mcac.ie t: +353 (0)65 6823452 m: +353 (0)87 2352554 --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
Job Openings at MCA
MCA Compliance Solutions Ltd wishes to recruit a Senior Technician and/or a Junior Technician to work in its Product Safety Lab. Senior Technician - 1. Must have a proven track record in product safety. This experience can have been gained in either a product safety test lab environment, or, through fulfilling a compliance engineering role in a product development company; 2. Will be responsible for the day-to-day running of the Product Safety Lab; 3. Will be required to train and mentor the Junior Technician; 4. Should be familiar with laboratory accreditation and/or quality management systems; 5. Must have a formal Certificate/Diploma level qualification, or equivalent; 6. Must have an understanding of product and component certification schemes e.g. UL, VDE; 7. Must be familiar with international standardisation schemes e.g. IEC, EN, UL 8. Must have excellent communication skills; Junior Technician - 1. Need not have a background in product safety testing; 2. Must be familiar and comfortable with a hands-on role in an electrical/electronic test lab environment. 3. Must have a formal Certificate/Diploma level qualification, or equivalent; 4. (Primarily) will be responsible for testing & report writing on a wide variety of product types; 5. Will work with the Senior Technician in continual process improvement activities; 5. Must have excellent communication skills; Interested applicants should send a brief outline of their career to date (including salary expectations) to the undersigned (text-based email is preferable): Mr.Brian McAuliffe Director MCA Compliance Solutions Ltd Unit 2 Lissane Business Park|Clarecastle|Co.Clare|Ireland w: www.mcac.ie e: i...@mcac.ie t: +353 (0)65 6823452 f: +353 (0)65 6844582 m: +353 (0)87 2352554 --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
Re: thermocouple welder
Yes. Get a good beefy DC power supply. Attach both leads of the thermocouple to one of the outputs PLUS or MINUS. Doesn't matter. Twist together the leads to be welded. Get a piece of lead that's used in drafters pencils. Attach this piece of lead to the other output of the power supply. Turn on the power supply. LIGHTLY and QUICKLY touch the twisted leads of the thermocouple to the lead a few times. Welding will commence. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
RE: EMC Chamber Relocation
Rich, Great info that is very timely for me as I am looking purchasing and relocating a used chamber. Any other tips on what to look for (i.e. corroded joints) from group members would be very helpful. Darrell Locke Advanced Input Devices -Original Message- From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: Tuesday, September 17, 2002 5:25 AM To: emc-p...@majordomo.ieee.org Subject: RE: EMC Chamber Relocation Jeff, we moved our chamber several times and had someone different do it each time based upon lowest quote. Some of your panels could be accidentally damaged during the move. We had some panels starting to separate due to moisture. Most were salvageable, however. Also, we found some corroded parts that needs to be replaced. We buffed up some panels and some frame members and reused them since we did not need more than 80 db isolation from our chamber which is about what we got afterwards. If you need more issolation, plan on replacing the corroded parts. We moved the chamber for about $4K. Now for the disaster story. We moved a compact immumity chamber. We contracted through a familiar company from whom we purchased the chamber and test equipment - a turn key installation. That company contacted the move to the chamber manufacturer. The move went well, but the recallibration did not. It is now 6 months later and the chamber is still out of calibration with all three parties squabling. I don't recommend going this route. Richard Woods Sensormatic Electronics Tyco International -Original Message- From: Collins, Jeffrey [mailto:jcoll...@ciena.com] Sent: Monday, September 16, 2002 3:10 PM To: emc-p...@majordomo.ieee.org Subject: EMC Chamber Relocation Hello Group, We are considering relocating our 3 meter EMC chamber. Can you: * Recommend a company that is proficient at this and will work in the Bay Area ( San Jose / San Francisco CA) * Give estimated costs * Share things to watch out for * Things you would do different the next time. * Give your experiences/opinion on Relocating chambers vs. Building a new one Thanks, Jeffrey Collins Sr. HW Engineering Manager EMC/ NEBS/ Reliability/ Safety CIENA Core Switching Division 10480 Ridgeview Court, Cupertino, CA. 95014 (408) 366-4806, Fax (408) 366-4867 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
Re: EMC Chamber Relocation
Hello Richard, All, Does anybody know know of any labs or companies looking to get rid of some ferrite tiles/panels? Judy Johnson - Original Message - From: To: Sent: Tuesday, September 17, 2002 8:24 AM Subject: RE: EMC Chamber Relocation > > Jeff, we moved our chamber several times and had someone different do it > each time based upon lowest quote. Some of your panels could be accidentally > damaged during the move. We had some panels starting to separate due to > moisture. Most were salvageable, however. Also, we found some corroded parts > that needs to be replaced. We buffed up some panels and some frame members > and reused them since we did not need more than 80 db isolation from our > chamber which is about what we got afterwards. If you need more issolation, > plan on replacing the corroded parts. We moved the chamber for about $4K. > > Now for the disaster story. We moved a compact immumity chamber. We > contracted through a familiar company from whom we purchased the chamber and > test equipment - a turn key installation. That company contacted the move to > the chamber manufacturer. The move went well, but the recallibration did > not. It is now 6 months later and the chamber is still out of calibration > with all three parties squabling. I don't recommend going this route. > > Richard Woods > Sensormatic Electronics > Tyco International > > > -Original Message- > From: Collins, Jeffrey [mailto:jcoll...@ciena.com] > Sent: Monday, September 16, 2002 3:10 PM > To: emc-p...@majordomo.ieee.org > Subject: EMC Chamber Relocation > > > > Hello Group, > > > We are considering relocating our 3 meter EMC chamber. Can you: > > * Recommend a company that is proficient at this and will work in the Bay > Area ( San Jose / San Francisco CA) > > * Give estimated costs > > * Share things to watch out for > > * Things you would do different the next time. > > * Give your experiences/opinion on Relocating chambers vs. Building a new > one > > > > Thanks, > > > Jeffrey Collins > Sr. HW Engineering Manager > EMC/ NEBS/ Reliability/ Safety > CIENA Core Switching Division > 10480 Ridgeview Court, Cupertino, CA. 95014 > (408) 366-4806, Fax (408) 366-4867 > 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 > > All emc-pstc postings are archived and searchable on the web at: > http://ieeepstc.mindcruiser.com/ > Click on "browse" and then "emc-pstc mailing list" > > --- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: emc-p...@hypercom.com > Dave Heald: davehe...@attbi.com > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > All emc-pstc postings are archived and searchable on the web at: > http://ieeepstc.mindcruiser.com/ > Click on "browse" and then "emc-pstc mailing list" > --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
CE Marking for Passive speakers
Hello everyone, I was wondering if anyone out there can provide me with help in determining whether passive speakers and headphones are required to be CE-Marked for entry into the EU? We have an old document from BAPT in Germany which implies that passive speakers are required to be CE Marked but this does not seem to make sense to me since there are no active components in the products and we would be declaring compliance by default. I have the same concern for Headphones. Also does anyone have a good contact person in the EU possibly with the European Commission they could share I would like to try to get some kind of official ruling on this issue. While it would be simple to CE-Mark our passive speaker products there are costs involved so I would prefer not to do it if it is not required. Thanks in advance for any help you can provide. Best regards, John John Tyra Design Assurance Engineering, Product Safety & Regulatory Manager Bose Corporation The Mountain, M.S.-450 Framingham, MA 01701-9168 508-766-1502 Phone 508-766-1145 Fax john_t...@bose.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
Re: Earthing through screws.
[ John Woodgate wrote ] > Oh, come on! There are dozens of safety standards; > surely you don't expect me to search and list them all? [ Doug McKean wrote ] You can't possibly be serious. I was more interested in the fact that since this forum is basically ITE, Medical, Test, and SEMI that at least some brief mention of at least one or maybe even two standards of which you're aware without research would suffice. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
Ferrite Tiles
Grettings All, Does anybody out there know of any labs or companies that may be downsizing or going out of business looking to get rid of any ferrite tiles? You may contact me privately if wish. Judy Johnson judit...@shentel.net
Ferrite Tiles
Grettings All, Does anybody out there know of any labs or companies that may be downsizing or going out of business looking to get rid of any ferrite tiles? You may contact me privately if wish. Judy Johnson judit...@shentel.net
thermocouple welder
any recommendations for a fine-wire thermocouple tip welder ? Brian Brian McAuliffe MCA Compliance Solutions Ltd Unit 2 Lissane Business Park|Clarecastle|Co.Clare|Ireland w: www.mcac.ie e: i...@mcac.ie t: +353 (0)65 6823452 m: +353 (0)87 2352554 --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
RE: Earthing through screws.
The primary screw has the ground symbol (upside down Christmas tree) in a circle, all other locations you want to indicate as ground, called PROTECTIVE BONDING SCREWS by the standard can use the symbol but without the circle, but it is not required to mark them. At least that's the word from UL 60950 section 1.7.7.1. Heck the screws that bond the cover to the base and its connection to the primary earthing connector are examples of this type of bonding. If you had two separate chassis with signal and other non-primary power interconnects, you might pass bonding through a braid strap or something as well. Reaching here, because I can't think of a time I didn't cram everything into a single enclosure. Gary -Original Message- From: Chris Maxwell [mailto:chris.maxw...@nettest.com] Sent: Tuesday, September 17, 2002 4:08 AM To: David Sproul; Doug McKean Cc: EMC-PSTC Subject: RE: Earthing through screws. David, Your question isn't so "stupid" as you say. It is correct that the "primary" grounding screw (the first screw connected to the ground wire from the AC inlet) shouldn't be used for any purpose other than grounding. However, the standards do allow that screws and fasteners can be used to pass this grounding on to other parts of the chassis. In that context (I guess you could call them "secondary" ground screws), your question is valid. It is worthwhile considering labeling these screws with a ground label; especially if a user could remove this screw and still operate the product. I guess what I'm trying to say is: your specific question may have an obvious answer; but the fact that you were thinking about how to make the product safe is just as important as quoting any standard chapter and verse. It is never stupid to use logic and reason along with the standards. 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 | "A friend is a person who knows the song in your heart because they stopped singing their own song long enough to hear yours :-) > -Original Message- > From: David Sproul [SMTP:david.spr...@alexanderlynn.co.uk] > Sent: Monday, September 16, 2002 5:46 PM > To: Doug McKean > Cc: EMC-PSTC > Subject: RE: Earthing through screws. > > > Hello Doug, > I believe you are right. If I had taken the trouble to read EN60950 para > 2.6.5.7, I would have saved my self from asking stupid questions. > > Thanks also to all those who responded to my orignial posting. > > regards, > David Sproul. > > > --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
RE: EMC Chamber Relocation
Jeff, we moved our chamber several times and had someone different do it each time based upon lowest quote. Some of your panels could be accidentally damaged during the move. We had some panels starting to separate due to moisture. Most were salvageable, however. Also, we found some corroded parts that needs to be replaced. We buffed up some panels and some frame members and reused them since we did not need more than 80 db isolation from our chamber which is about what we got afterwards. If you need more issolation, plan on replacing the corroded parts. We moved the chamber for about $4K. Now for the disaster story. We moved a compact immumity chamber. We contracted through a familiar company from whom we purchased the chamber and test equipment - a turn key installation. That company contacted the move to the chamber manufacturer. The move went well, but the recallibration did not. It is now 6 months later and the chamber is still out of calibration with all three parties squabling. I don't recommend going this route. Richard Woods Sensormatic Electronics Tyco International -Original Message- From: Collins, Jeffrey [mailto:jcoll...@ciena.com] Sent: Monday, September 16, 2002 3:10 PM To: emc-p...@majordomo.ieee.org Subject: EMC Chamber Relocation Hello Group, We are considering relocating our 3 meter EMC chamber. Can you: * Recommend a company that is proficient at this and will work in the Bay Area ( San Jose / San Francisco CA) * Give estimated costs * Share things to watch out for * Things you would do different the next time. * Give your experiences/opinion on Relocating chambers vs. Building a new one Thanks, Jeffrey Collins Sr. HW Engineering Manager EMC/ NEBS/ Reliability/ Safety CIENA Core Switching Division 10480 Ridgeview Court, Cupertino, CA. 95014 (408) 366-4806, Fax (408) 366-4867 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
RE: PCI low profile dc-dc
Some low profile AC-DC manufacturers: Martek Vicor Lambda Pico None of them are cheap; but if you want low profile, PCB mount, high reliability; then these are some viable suppliers. 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: Peter Merguerian [SMTP:pmerguer...@itl.co.il] > Sent: Tuesday, September 17, 2002 5:24 AM > To: 'Gert Gremmen'; Hans Mellberg; emc-p...@majordomo.ieee.org > Subject: RE: PCI low profile dc-dc > > > Gert and Hans, > > In Hans's e-mail he specifies dc-dc convertors. In your e-mail, you specify > ac-dc convertor. I assume you mean mains ac - dc. > > For dc-dc there you need not purchase a medical grade convertor since I > assume you will have reinforced insulation between the patient aplied part > and the ac mains. > > For ac-dc, most convertors in the market are encapsulated and approved to > ITE requirements. Some are approved for operational insulation between input > and output, others for basic insulation between input and output and most > for reinforced insulation between input and output. Per IEC 60 601-1 there > are no internal creepage requirements and no long term aging tests for the > encapsulation like in IEC 60 950. If you choose a regular ITE ac-dc which > meets 4000 Vac dielectric strength betwen input and output and make sure you > have the clearance/creepage requirements for reinforced insulation between > input and output (8.0 mm clearance/creepage), then you have nothing to worry > about for isolation between patient applied parts and the mains. Of course, > leakage current is also an issue you have to take into consideration. > > > > This e-mail message may contain privileged or confidential information. If > you are not the intended recipient, you may not disclose, use, disseminate, > distribute, copy or rely upon this message or attachment in any way. If you > received this e-mail message in error, please return by forwarding the > message and its attachments to the sender. > > > > > > > PETER S. MERGUERIAN > Technical Director > I.T.L. (Product Testing) Ltd. > 26 Hacharoshet St., POB 211 > Or Yehuda 60251, Israel > Tel: + 972-(0)3-5339022 Fax: + 972-(0)3-5339019 > Mobile: + 972-(0)54-838175 > http://www.itl.co.il > http://www.i-spec.com > > > > > > -Original Message- > From: Gert Gremmen [mailto:g.grem...@cetest.nl] > Sent: Saturday, September 14, 2002 12:07 PM > To: Hans Mellberg; emc-p...@majordomo.ieee.org > Subject: RE: PCI low profile dc-dc > > > > May I add: > > Looking for a low profile ac-dc on board converter having a decent > medical approval i.e. more then basic insulation between primary > and secundary. Any suggestions for a manufacturer ? My client > is located in Malaysia . > Gert Gremmen > ce-test > > -Original Message- > From: owner-emc-p...@majordomo.ieee.org > [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Hans Mellberg > Sent: vrijdag 13 september 2002 21:22 > To: emc-p...@majordomo.ieee.org > Subject: PCI low profile dc-dc > > > > I am designing a PCI card that requires the use of several on-board dc-dc > converters > for 24V, 48V and a varialble V. Any suggestions to sources are greatly > appreciated, > Thanks in advance > > > = > Best Regards > Hans Mellberg > Regulatory Compliance & EMC Design Services Consultant > By the Pacific Coast next to Silicon Valley, > Santa Cruz, CA, USA > office:831-454-9450, cell:408-507-9694, fax:831-454-0755 > > __ > Do you Yahoo!? > Yahoo! News - Today's headlines > http://news.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 > > All emc-pstc postings are archived and searchable on the web at: > http://ieeepstc.mindcruiser.com/ > Click on "browse" and then "emc-pstc mailing list" > > > > > --- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list a
RE: Add-On Printed Circuit
Warren, John stated that Products A and B are sold independent of each other. Only product A has Listing Marks and is the one that gets inspected by the Follow-Up inspector. Follow-up inspector never sees Product B unless he's very smart and gathers from the Product A's manual that it is an optional board. Remember that follow-up inspectors are taught to inspect only products that have the NRTL mark. However, the problem is in the field. Someone who opens up Product A in the field and adds a non-Listed accessory board has violated the Listing Mark on that product. Product A's Listing is not valid unless the NRTL has evaluated the combination of Product A and Product B together and has covered both under their Listing program. Some examples of products that are accessory Listed are: optional cards that can be fitted on the equipment; optional fan tray, optional mouse, etc. PETER S. MERGUERIAN Technical Director I.T.L. (Product Testing) Ltd. 26 Hacharoshet St., POB 211 Or Yehuda 60251, Israel Tel: + 972-(0)3-5339022 Fax: + 972-(0)3-5339019 Mobile: + 972-(0)54-838175 http://www.itl.co.il http://www.i-spec.com -Original Message- From: Warren Birmingham [mailto:war...@comfortjets.com] Sent: Monday, September 16, 2002 10:21 PM To: John Juhasz Cc: emc-p...@ieee.org Subject: Re: Add-On Printed Circuit You don't say to which standard UL has investigated the Product A device or whether is is a listed product or a Recognized Component. The listed product A must conform to the was it was built by the manufacturer. Changes/options to it must be shown in the Followup Services Books, otherwise the product is not covered and UL may force the shipments to be held for conformance or the listing mark removed. RCs are evaluated for use in the end product according to UL's conditions. Warren Birmingham Epsilon-Mu Consultants On Monday, Sep 16, 2002, at 08:25 US/Pacific, John Juhasz wrote: > > Colleagues, > > I am seeking your input. > > Manufacturer A sells a complete, fully approved (CE, FCC Part 15, UL, > etc) > product (product A) > Manufacturer B makes a device (product B) that will plug into a > connector in > product A > (actually inside product A's enclosure - like a 'daughter' module) as a > value added feature. > There are no external interfaces on product B, and it is not accessible > unless product A is totally dismantled. Product B is intended/sold > only for > use with product A, > and is otherwise useless. > The two products are sold independent of each other by the > manufacturers to > 'dealer/installers'. > When the dealer/installer sells/installs product A, he can offer > product B > as an option. > > What are the regulatory requirements/manufacturer's responsibilities > for > product B? > (est. 2-3 inches square, UL 94V-0 printed circuit board, tens of mA > 12V DC, > no external interfaces. > On-board clock). > > Thoughts? > > John A. Juhasz > > GE Interlogix > Fiber Options Div. > Bohemia, NY > > > --- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: emc-p...@hypercom.com > Dave Heald: davehe...@attbi.com > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > All emc-pstc postings are archived and searchable on the web at: > http://ieeepstc.mindcruiser.com/ > Click on "browse" and then "emc-pstc mailing list" > --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com
RE: Acousic Noise from ITE
Found in my dusty folder of seldom-used standards: ETS 300 753: October 1997 (Equipment Engineering; Acoustic noise emitted by telecommunication equipment) Is references: 1. ISO 7779 2. ISO 9296 3. ETS 300 019-1 (1994) 4. EEC directive 86/188/EEC 5. ETR 116 (1994) 6. ECMA TR/27 Call me if you need more information. Regards, Naftali Shani, Catena Networks (www.catena.com) 307 Legget Drive, Ottawa, Ontario, Canada K2K 3C8 613.599.6430/866.2CATENA (X.8277); C 295.7042; F 599.0445 E-mail: nsh...@catena.com -Original Message- From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: Monday, September 16, 2002 11:44 AM To: emc-p...@majordomo.ieee.org Subject:Acousic Noise from ITE Are there any EU or national (e.g. GS) normative requirements to comply with any of the following standards or any other acoustic standards for ITE? > EN27779 Acoustic measurement of airborn noise emitted by computer and > business equipment. > EN29295 Acoustic measurement of high frequency noise emitted by computer > and business equipment. > ISO 9296 Acoustics declared noise emission values of emitted by computer > and business equipment. > > 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
Medical Wrist Device and Cardiac Pacemakers
Dear All, For a medical device to be worn on the wrist of a patient, does anyone know what additional requirements (if any) should the manufacturer of the medical device take in order for the device not to interfere with a cardiac pacemaker? My little research on the subject tells me that the cardiac pacemaker manufacturer should take all the required measures so that any other device nearby (cellular telephones, medical equipment, etc.) does not interfere with the pacemaker. Is this correct? Best Regards This e-mail message may contain privileged or confidential information. If you are not the intended recipient, you may not disclose, use, disseminate, distribute, copy or rely upon this message or attachment in any way. If you received this e-mail message in error, please return by forwarding the message and its attachments to the sender. PETER S. MERGUERIAN Technical Director I.T.L. (Product Testing) Ltd. 26 Hacharoshet St., POB 211 Or Yehuda 60251, Israel Tel: + 972-(0)3-5339022 Fax: + 972-(0)3-5339019 Mobile: + 972-(0)54-838175 http://www.itl.co.il http://www.i-spec.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
RE: Earthing through screws.
David, Your question isn't so "stupid" as you say. It is correct that the "primary" grounding screw (the first screw connected to the ground wire from the AC inlet) shouldn't be used for any purpose other than grounding. However, the standards do allow that screws and fasteners can be used to pass this grounding on to other parts of the chassis. In that context (I guess you could call them "secondary" ground screws), your question is valid. It is worthwhile considering labeling these screws with a ground label; especially if a user could remove this screw and still operate the product. I guess what I'm trying to say is: your specific question may have an obvious answer; but the fact that you were thinking about how to make the product safe is just as important as quoting any standard chapter and verse. It is never stupid to use logic and reason along with the standards. 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 | "A friend is a person who knows the song in your heart because they stopped singing their own song long enough to hear yours :-) > -Original Message- > From: David Sproul [SMTP:david.spr...@alexanderlynn.co.uk] > Sent: Monday, September 16, 2002 5:46 PM > To: Doug McKean > Cc: EMC-PSTC > Subject: RE: Earthing through screws. > > > Hello Doug, > I believe you are right. If I had taken the trouble to read EN60950 para > 2.6.5.7, I would have saved my self from asking stupid questions. > > Thanks also to all those who responded to my orignial posting. > > regards, > David Sproul. > > > --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
RE: PCI low profile dc-dc
Gert and Hans, In Hans's e-mail he specifies dc-dc convertors. In your e-mail, you specify ac-dc convertor. I assume you mean mains ac - dc. For dc-dc there you need not purchase a medical grade convertor since I assume you will have reinforced insulation between the patient aplied part and the ac mains. For ac-dc, most convertors in the market are encapsulated and approved to ITE requirements. Some are approved for operational insulation between input and output, others for basic insulation between input and output and most for reinforced insulation between input and output. Per IEC 60 601-1 there are no internal creepage requirements and no long term aging tests for the encapsulation like in IEC 60 950. If you choose a regular ITE ac-dc which meets 4000 Vac dielectric strength betwen input and output and make sure you have the clearance/creepage requirements for reinforced insulation between input and output (8.0 mm clearance/creepage), then you have nothing to worry about for isolation between patient applied parts and the mains. Of course, leakage current is also an issue you have to take into consideration. This e-mail message may contain privileged or confidential information. If you are not the intended recipient, you may not disclose, use, disseminate, distribute, copy or rely upon this message or attachment in any way. If you received this e-mail message in error, please return by forwarding the message and its attachments to the sender. PETER S. MERGUERIAN Technical Director I.T.L. (Product Testing) Ltd. 26 Hacharoshet St., POB 211 Or Yehuda 60251, Israel Tel: + 972-(0)3-5339022 Fax: + 972-(0)3-5339019 Mobile: + 972-(0)54-838175 http://www.itl.co.il http://www.i-spec.com -Original Message- From: Gert Gremmen [mailto:g.grem...@cetest.nl] Sent: Saturday, September 14, 2002 12:07 PM To: Hans Mellberg; emc-p...@majordomo.ieee.org Subject: RE: PCI low profile dc-dc May I add: Looking for a low profile ac-dc on board converter having a decent medical approval i.e. more then basic insulation between primary and secundary. Any suggestions for a manufacturer ? My client is located in Malaysia . Gert Gremmen ce-test -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Hans Mellberg Sent: vrijdag 13 september 2002 21:22 To: emc-p...@majordomo.ieee.org Subject: PCI low profile dc-dc I am designing a PCI card that requires the use of several on-board dc-dc converters for 24V, 48V and a varialble V. Any suggestions to sources are greatly appreciated, Thanks in advance = Best Regards Hans Mellberg Regulatory Compliance & EMC Design Services Consultant By the Pacific Coast next to Silicon Valley, Santa Cruz, CA, USA office:831-454-9450, cell:408-507-9694, fax:831-454-0755 __ Do you Yahoo!? Yahoo! News - Today's headlines http://news.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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail t
RE: EMI from heatsinks - humor
Bill's AutoSignature reads .. "Friends are those people who know the words to the song in your heart and sing them back to you when you have forgotten the words." (unattributed) *** Visit us at www.artesyn.com/cp ** "Friends" or "incompetent surgeons" who leave their minidisc player in your chest after a bypass! -Original Message- From: Fleury, Bill [SMTP:bi...@artesyncp.com] Sent: Monday, September 16, 2002 6:18 PM To: 'rgeorger...@carrieraccess.com' Cc: 'emc-p...@ieee.org' Subject:EMI from heatsinks Richard, I have three different articles about this subject. I think I found them on CDs from recent IEEE EMC Symposiums but I don't remember which ones or even if they were all on the same CD. I saved the files so I can e-mail them to you if you wish; as I don't think the files are that big. Regards, Bill Fleury ***Artesyn Communication Products, LLC** Bill Fleury Email: bi...@artesyncp.com Compliance Engineer Phone: 608-826-8375 8310 Excelsior DriveFax: 608-831-8844 Madison, WI 53717 "Friends are those people who know the words to the song in your heart and sing them back to you when you have forgotten the words." (unattributed) *** Visit us at www.artesyn.com/cp ** --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" This e-mail has been scanned for all viruses by Star Internet. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
RE: Add-On Printed Circuit
John, Since product B is an accessory for use with UL Listed Product A, then I would submit product B to UL for accessory Listing for use with Product A. This is a very wise thing to do, especially if there were any questions by local inspectors or by the judge in case of a product liabilility lawsuit. Accessory Listing product B should be no problem at all. UL might ask you to throw in an instruction leaflet on how to install accessory B properly and that this must be done by qualified personnel. In regards to the UL Listing Mark, it is the same as the one you have on the product A except for the element ACCESSORY LISTED instead of LISTED adjacent to the UL logo. Being a small unit, UL also allows you to put all the required markings and UL logo on the packaging rather than on the product. Regards, This e-mail message may contain privileged or confidential information. If you are not the intended recipient, you may not disclose, use, disseminate, distribute, copy or rely upon this message or attachment in any way. If you received this e-mail message in error, please return by forwarding the message and its attachments to the sender. PETER S. MERGUERIAN Technical Director I.T.L. (Product Testing) Ltd. 26 Hacharoshet St., POB 211 Or Yehuda 60251, Israel Tel: + 972-(0)3-5339022 Fax: + 972-(0)3-5339019 Mobile: + 972-(0)54-838175 http://www.itl.co.il http://www.i-spec.com -Original Message- From: John Juhasz [mailto:john.juh...@ge-interlogix.com] Sent: Monday, September 16, 2002 5:25 PM To: 'emc-p...@ieee.org' Subject: Add-On Printed Circuit Colleagues, I am seeking your input. Manufacturer A sells a complete, fully approved (CE, FCC Part 15, UL, etc) product (product A) Manufacturer B makes a device (product B) that will plug into a connector in product A (actually inside product A's enclosure - like a 'daughter' module) as a value added feature. There are no external interfaces on product B, and it is not accessible unless product A is totally dismantled. Product B is intended/sold only for use with product A, and is otherwise useless. The two products are sold independent of each other by the manufacturers to 'dealer/installers'. When the dealer/installer sells/installs product A, he can offer product B as an option. What are the regulatory requirements/manufacturer's responsibilities for product B? (est. 2-3 inches square, UL 94V-0 printed circuit board, tens of mA 12V DC, no external interfaces. On-board clock). Thoughts? John A. Juhasz GE Interlogix Fiber Options Div. Bohemia, NY --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
Re: New EU regulations - civil aviation
We actually tested the equipment with the wiring installation and it took several months and quite considerable amount of work to get the equipment to meet DO-160C with the cabling (supplied by Boeing). No the system is not flight critical however other systems that have been supplied by our company are and these also use unscreened cable. By unscreened I mean the cables have no overall screen as used by military cableforms. ERA & QinetiQ have tested various PED such as Laptops, CD Walkmans, Portable DVD players, Video Walkmans, Camcorders, Furbies, etc. Aside from the Furbies and Laptops the majority rest of the items tested met DO-160C limits, however, after an incident with a Video walkman which was reported to open the waste dump valve on a 747 the item was purchased from the owner by the UKCAA and tested. This was found to be at several frequencies 20-30dB in excess of limits. Examination of the unit found that it had been modified at some time. This poses the question what controls are there on PEDS. They can be tested as new items but their integrity may be compromised when they are repaired or modified by an unauthorised repairer. Iam sure that if you get in touch with Eric Stevens of ERA, Dr Nigel Carter of Qinetiq or Dave Hudson UKCAA they can give you more information. Regards Andy Andrew Price Principal Development Engineer (EMC Specialist) BAE SYSTEMS Avionics A125 Christopher Martin Road Basildon, Essex SS14 3EL tel: +44 (0) 1268 883308 email: andrew.p.pr...@baesystems.com *** This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. *** --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
Re: Earthing through screws.
I read in !emc-pstc that Doug McKean wrote (in <006101c25dec$2b8d49e0$cb3e3...@corp.auspex.com>) about 'Earthing through screws.' on Mon, 16 Sep 2002: > >[ Doug McKean wrote ] >> >I wasn't aware that primary grounding securements >> >could be used for another purpose. > >[ John Woodgate wrote ] >> It depends on the applicable safety standard; some allow it, some don't. > >[ Doug McKean wrote ] >Then since you've got my curiosity up, which ones >allow for primary grounding securement to be used >for something other than primary grounding. Oh, come on! There are dozens of safety standards; surely you don't expect me to search and list them all? -- 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
RE: Earthing through screws.
Hello Doug, I believe you are right. If I had taken the trouble to read EN60950 para 2.6.5.7, I would have saved my self from asking stupid questions. Thanks also to all those who responded to my orignial posting. regards, David Sproul. -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Doug McKean Sent: 16 September 2002 18:58 To: EMC-PSTC Subject: Re: Earthing through screws. I wasn't aware that primary grounding securements could be used for another purpose. Regards, Doug McKean --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
Re: Earthing through screws.
[ Doug McKean wrote ] > >I wasn't aware that primary grounding securements > >could be used for another purpose. [ John Woodgate wrote ] > It depends on the applicable safety standard; some allow it, some don't. [ Doug McKean wrote ] Then since you've got my curiosity up, which ones allow for primary grounding securement to be used for something other than primary grounding. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
RE: New EU regulations - civil aviation
The navigation systems which are protected by regulation were developments of the 1940's, and -- except for interference! -- work pretty well. They are analog technology, using phase and amplitudes of audio frequency tones to determine position and/or deviation from course. For landing, the ILS system transmits amplitude modulated signals between 108 and 112 MHz (if I remember correctly -- it s been a long time) with a 90 Hz modulated beam to one side of the runway, and a 150 Hz modulated beam on the other. Where the two tones are demodulated at equal strength is (with a properly aligned and functioning system) along the runway center line. The receiver has filters to discriminate between the tones, but interference can displace the indicated position to one side or the other, with quite possibly fatal results. The Glide Slope system operates similarly at around 330 MHz, with beams aligned upwards at an angle such that equally demodulated tones indicate a correct rate of descent. VOR is also an analog system. VOR operates (if I remember rightly) between 112 and 116 Mhz. Basically, it is a scanning directional array, which sweeps its azimuthal pattern maximum around 30 times each second. At the same time it transmits a subcarrier of (approximately) 10 KHz, which is frequency modulated with a reference 30 Hz, such that when the beam is North, the phase of the tones demodulated in an aircraft North of the VOR station will agree with each other. The difference in phase between the received signal modulated as a result of the patterns' rotation, and the subcarrier's modulation, indicates direction to the aircraft from the VOR station. Again, this is easily interfered with. A substantial area around each VOR must be restricted for construction, as even multipath from re-radiated signals will cause the indicated bearing from the station to be off. All of these systems have detectors to indicate the absence of a tone, and a warning flag pops up in its display to show an invalid signal (or none). However, the flag is only an indicator of total absence of tone. If an interfering signal presents a tone, the receiver will not distinguish between it and a valid signal, and the flag will not be displayed. Consequently, the safety of these systems depends on how well their signals are received. Cortland --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
