RE: Direct Contact Discharge into Vents to EN61000-4-2
Hi Bill, The reason for the contact discharge ESD test is to simulate discharges that can result from handling of the product, such as our finger touching, connector connect/disconnect, tools pick up the product, etc. So if normally we have a chance of reaching deep into the vent and contacting it inside, then we need to do that. If not, then no need to do so. If the vent is smaller than our small finger, I can imagine there's no chance that we can reach deep into the vent, unless the product is normally handled by a tool which is small enough to get into the vent. Then you have to do it. BTW, the air discharge and contact discharge are simulating two different discharge phenomena. So it's not necessary that your contact discharge areas and air discharge areas have to follow up on each other. Alfred Ip Trimble Navigation Ltd. > -- > From: Jacowleff, Bill[SMTP:bjacowl...@vdo.com] > Reply To: Jacowleff, Bill > Sent: Friday, September 24, 1999 1:02 PM > To: Emc-Pstc (E-mail) > Subject: Direct Contact Discharge into Vents to EN61000-4-2 > > > > > > -Original Message- > > From: Jacowleff, Bill > > Sent: Friday, September 24, 1999 3:53 PM > > To: EMC POST GROUP (E-mail) > > Subject:Direct Contact Discharge into Vents to EN61000-4-2 > > > > > > > > Greetings to all: > > > > I am testing a product that has small plastic modular housing with > > vents to EN61000-4-2. > > > > At 8 kV Air discharge I have discharge to the open vents which is > > fine, the PCB is protected on the perimeter and tolerates this well. > > > > However my question is with the Direct Contact Discharge to these > > vented areas. I am under the impression of > > where I have an air discharge I am to follow-up that area with a > > Direct Contact Discharge. In this particular case the vents > > are large enough to allow the tapered Direct Contact Discharge Tip > > to fit deep enough in the vents, passing the perimeter protection > > on the PCB and come in direct contact with one component on the PCB. > > > > So my question is How far should the Direct Contact Discharge Tip be > > inserted into a vent? As far as it will reach? Or should the Direct > > Contact Discharge Tip be limited to touching the outside wall of the > > module near the vent? > > > > Thanks for your reponse in advance. > > > > Best Regards, > > > > Bill Jacowleff > > VDO Control Systems > > Airpax Instruments > > 150 Knotter Drive > > Cheshire, CT 06410 > > Phone: 203 271-6394 > > FAX:203 271-6200 > > bjacowl...@vdo.com > > > > - > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to majord...@ieee.org > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to ed.pr...@cubic.com, > jim_bac...@monarch.com, ri...@sdd.hp.com, or > roger.volgst...@compaq.com (the list administrators). > > - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: UL and CE Mark Acceptance
1) The US 2) Western Europe 3) Not asked but things are evolving. A CB scheme report will help in somewhat in a larger world populations but some folks are figuring out that they can make money by requiring Country-centric approvals - EG Mexico, Argentina, China. I suppose # 3 may be a little cynical Gary -Original Message- From: PRYOR MCGINNIS [mailto:c...@prodigy.net] Sent: Friday, September 24, 1999 12:14 PM To: 'EMC-PSTC - forum' Subject: UL and CE Mark Acceptance Importance: High Hello All, What countries will accept UL Mark without additional testing or marking? Does anyone know of a list of countries other than the EU members that accept the CE Marking without additional testing or marking? Best Regards, Pryor McGinnis c...@prodigy.net - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
UL and CE Mark Acceptance
Pryor, > What countries will accept UL Mark without additional testing or marking? Officially: NONE. cUL is accepted in Canada. > Does anyone know of a list of countries other than the EU members that accept the CE Marking without additional testing or marking? The CE marking is also accepted in the following non-EU countries: Switzerland, Norway and Iceland. I hope this helps, John Radomski Compliance Engineer Inter-Tel Integrated Systems - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: Direct Contact Discharge into Vents to EN61000-4-2
Hi Bill, The procedure for testing to the E.S.D. Standard (EN61000-4-2:1995) is to start with contact discharge towards reachable metal surfaces. Contact discharge is the prefered method. Air discharges shall be used where contact discharges canot be applied. You only use the air discharge gun on plastic material. Generally there is no discharge on plastic thus the reason for a higher level for air discharge. Hope this helps, for it just my opinion -Original Message- From: Jacowleff, Bill [mailto:bjacowl...@vdo.com] Sent: Friday, September 24, 1999 4:03 PM To: Emc-Pstc (E-mail) Subject: Direct Contact Discharge into Vents to EN61000-4-2 > -Original Message- > From: Jacowleff, Bill > Sent: Friday, September 24, 1999 3:53 PM > To: EMC POST GROUP (E-mail) > Subject: Direct Contact Discharge into Vents to EN61000-4-2 > > > > Greetings to all: > > I am testing a product that has small plastic modular housing with > vents to EN61000-4-2. > > At 8 kV Air discharge I have discharge to the open vents which is > fine, the PCB is protected on the perimeter and tolerates this well. > > However my question is with the Direct Contact Discharge to these > vented areas. I am under the impression of > where I have an air discharge I am to follow-up that area with a > Direct Contact Discharge. In this particular case the vents > are large enough to allow the tapered Direct Contact Discharge Tip > to fit deep enough in the vents, passing the perimeterprotection > on the PCB and come in direct contact with one component on the PCB. > > So my question is How far should the Direct Contact Discharge Tip be > inserted into a vent? As far as it will reach? Or shouldthe Direct > Contact Discharge Tip be limited to touching the outside wall of the > module near the vent? > > Thanks for your reponse in advance. > > Best Regards, > > Bill Jacowleff > VDO Control Systems > Airpax Instruments > 150 Knotter Drive > Cheshire, CT 06410 > Phone: 203 271-6394 > FAX:203 271-6200 > bjacowl...@vdo.com > - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Re: Bonding Meter
That pretty much takes a four point measurement. However, if you're after only reading "about" the right value, or side by side comparisons of the esr of a cap, try Dick Smith's esr meter. Less than $60 in kit form from Australia. Is easy to put together and extremely functional for measuring the esr of caps (while still in the circuit) and for measuring all kinds of other low impedance stuff, like connectors. I think the model number is the K-7204, or such. - Robert - -Original Message- From: Derek Walton To: IEEE EMC Discussion Group List-Post: emc-pstc@listserv.ieee.org Date: Friday, September 24, 1999 11:35 AM Subject: Bonding Meter > >Hi folks, > >can anyone recommend a meter for making resistance measurements as low >as 1 milliohm? > >Thanks, > >Derek. > > - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Direct Contact Discharge into Vents to EN61000-4-2
> -Original Message- > From: Jacowleff, Bill > Sent: Friday, September 24, 1999 3:53 PM > To: EMC POST GROUP (E-mail) > Subject: Direct Contact Discharge into Vents to EN61000-4-2 > > > > Greetings to all: > > I am testing a product that has small plastic modular housing with > vents to EN61000-4-2. > > At 8 kV Air discharge I have discharge to the open vents which is > fine, the PCB is protected on the perimeter and tolerates this well. > > However my question is with the Direct Contact Discharge to these > vented areas. I am under the impression of > where I have an air discharge I am to follow-up that area with a > Direct Contact Discharge. In this particular case the vents > are large enough to allow the tapered Direct Contact Discharge Tip > to fit deep enough in the vents, passing the perimeterprotection > on the PCB and come in direct contact with one component on the PCB. > > So my question is How far should the Direct Contact Discharge Tip be > inserted into a vent? As far as it will reach? Or shouldthe Direct > Contact Discharge Tip be limited to touching the outside wall of the > module near the vent? > > Thanks for your reponse in advance. > > Best Regards, > > Bill Jacowleff > VDO Control Systems > Airpax Instruments > 150 Knotter Drive > Cheshire, CT 06410 > Phone: 203 271-6394 > FAX:203 271-6200 > bjacowl...@vdo.com > - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
High-power amplifier
I am looking for an amplifier with the following specifications: Frequency Range: 1 Hz - 200 kHz Output Power: 500 Watts into 0.5 ohms Can anyone suggest a possible source. Regards, Ravinder Email: ajm...@us.ibm.com *** Always do right. This will gratify some people and astonish the rest. Mark Twain - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
IEEE 1329
Dear IEEE subscribers: We are interested in purchasing ANSI/IEEE Standard 1329-1999, Standard Method for Measuring Transmission Performance of Hands-Free Telephone Sets. We contacted IEEE last week and they stated that it was not available yet and suggested that we contact the Chairman of this standard, Mr. John Bareham for additional information. Attempts to contact John have not resulted in a response. We would appreciate any information regarding the date or time frame that IEEE 1329 might be available and if a draft is available from an alternate source. Thank you and best regards, Paul A. Lubeski Project Manager, Telephone Technology Center Wyle Laboratories, Inc. 7800 HWY 20 W. Huntsville, AL 35806 (256) 837-4411 ext. 494 (256) 830-0904 fax plube...@hnt.wylelabs.com http://www.wylelabs.com - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
UL and CE Mark Acceptance
Hello All, What countries will accept UL Mark without additional testing or marking? Does anyone know of a list of countries other than the EU members that accept the CE Marking without additional testing or marking? Best Regards, Pryor McGinnis c...@prodigy.net - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Re: Bonding Meter
Derek: It is going to take an instrument with 4-lead Kelvin probes. I would recommend that you get in touch with Keithly Instruments @ 440-248-0400. I suggest that you be seated when they quote price! Regards, Val L. Erwin EMC Consultant Summit Associates, Inc. - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Re: LCD Displays
Hi Duncan: > I have a product that has an LCD display with an Inverter that operates at > 100Khz 2KV and I believe is capable of supplying 6.5mA The question is does > it > require a fire enclosure? Assuming you are using IEC 60950, a fire enclosure is required for any circuit exceeding the limits of ELV, independent of available current or power. However, you MAY be able to invoke other requirements to avoid a fire enclosure. Here are some of the "outs:" Sub-clause 4.4.5.2, third dashed paragraph: Some interpretations of allow that once a limited power source has been achieved, ALL circuits down- stream from that limited power source are treated as limited power even if the voltage is stepped up above the limits of limited power. Sub-clause 4.4.1, method 2. This allows fault testing in lieu of a fire enclosure. Most low-power, high voltage inverters are rather simple circuits; extensive fault testing only involves a few components, so such testing is feasible and likely to result in acceptable results. > If it does what are the requirements for the flamability of the screen and > any > plastic protective covers fitted to it. A fire enclosure requires that the plastic materials be rated V-1 or better. Note that the fire enclosure need not be the overall product enclosure (e.g., screen), but can be an inner part designated as the fire enclosure for the inverter circuit. Best regards, Rich - Richard Nute Product Safety Engineer Hewlett-Packard Company Product Regulations Group AiO Division Tel : +1 858 655 3329 16399 West Bernardo Drive FAX : +1 858 655 4979 San Diego, California 92127 e-mail: ri...@sdd.hp.com - - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RESUMES & JOB LISTINGS
Group, As a free service, we are now posting resumes and job openings in our EMC SUPPLIERS DIRECTORY: http://www.tempest-inc.com/suppliers.htm If you are looking for EMC people or looking for a job, email your resume or job announcement to us and we will post it at no charge. We already have some good ones, so take a look! regards, Lou Gnecco - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
GTEM Cells for Pre-Compliance
My company manufacturers small (physically) products. I am investigating the use of a GTEM cell for pre-compliance radiated emissions/immunity testing to EN 55022, FCC Part 15, ICES-03, AS/NZS 3548 etc . . . I would like to hear from this group what your views are concerning this. The key word here is 'pre-compliance'. Has anyone had any experience using GTEM cells and how have your results correlated with final compliance scans at an OATS? John A. Juhasz Product Qualification & Compliance Engr. Fiber Options, Inc. 80 Orville Dr. Suite 102 Bohemia, NY 11716 USA Tel: 516-370-1324 Fax: 516-567-8322
Re: Bonding Meter
Hi Derek: > can anyone recommend a meter for making resistance measurements as low > as 1 milliohm? Check out the Hypatia Model 309 high-current-sourcing milliohmmeter. http://www.HypatiaInc.com Hypatia Inc. 15270 SW Holly Hill Road Hillsboro, OR 97123-9074 1-800-Hypatia (1-800-497-2842) Email:supp...@hypatiainc.com Note that Hypatia says that connections to the EUT will have 1-2 milliohms resistance in themselves. To measure 1 milliohm, you will need to use Kelvin probes. Best regards, Rich - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
LCD Displays
I have a product that has an LCD display with an Inverter that operates at 100Khz 2KV and I believe is capable of supplying 6.5mA The question is does it require a fire enclosure? If it does what are the requirements for the flamability of the screen and any plastic protective covers fitted to it. The screen is quite large, about the size of a laptop PC screen. Perhaps some laptop PC manufacturers might have some ideas? are there any other things I must consider when using such a device apart from, obviously, insulation of the HT. Regards, Duncan. - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: Modulations during Radiated Immunity Tests
Krzysztof The medical device standards EN 60601-1-2, and the US FDA regulations require the use of a modulation frequency that is representative of the function being measured. (i.e. respiration, heart rate, brain waves, etc.) This makes for an interesting test as the frequencies involved are usually a range that has to be swept for each Carrier frequency step. John Mowbray EMC Engineer NCR Canada > -Original Message- > From: krzys...@polbox.com [SMTP:krzys...@polbox.com] > Sent: Friday, September 24, 1999 6:22 AM > To: emc-p...@majordomo.ieee.org > Subject: Modulations during Radiated Immunity Tests > Importance: High > > > Dear Group, > My matter concerns different kinds of modulation used during radiated > immunity tests. For instance: > > IEC 1000-4-3: 1995 describes 80%-depth Amplitude Modulation with a 1kHz > sinwave, > > ENV 50204: 1995 describes keyed carrier modulation (on-off, duty cycle > 50%). > > My question is: do you know any standards (international, national, > technical documentations, etc.) which describes different kind of > modulations than these above (for instance AM with squarewave or > Frequency Modulation or other ways of carrier keying) during tests. > Would you please give me the number and title of the standards, > frequency range, test levels and, of course, parameters of modulation. > > The second question: do you know any product, product family and other > standards which call AM80%1kHz modulation and keyed carrier - cycle duty > 50%. > > Thank you, > Krzysztof Sieczkarek > > Laboratorium Technik Automatycznej Identyfikacji > Instytutu Logistyki i Magazynowania > Poznan, Poland > fax +48 61 8526376 > http://www.ilim.poznan.pl/la/index_E.html > > > > > - > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to majord...@ieee.org > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to ed.pr...@cubic.com, > jim_bac...@monarch.com, ri...@sdd.hp.com, or > roger.volgst...@compaq.com (the list administrators). > - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
IEC 60990 Vs IEC 60950
PSNet The announcement of the availability of the update to IEC 60990, shown below, has been circulating for a short time now. As Convenor (Chairman) of this committee I had not generally circulated it to the PSNet since it is not a product standard but a basic standard to be used by product standards writing committees. As is usually the case, the information in basic standards is excerpted or summarized in product standards. Two IEC committees have been integrating this information into their product standards for some time; IEC TC66/IEC 61010 (and the 1010 derivitive EN, CSA and UL standards) and IEC TC74/IEC 60950 (and the 950 derivitive EN, CSA and UL standards). The implementation of these requirements into these two standards families is done in a slightly different way and neither is a full copy of the IEC 60990 set of recommended requirements. The certification requirements for the products are contained in the end product standard. We expect to see ongoing changes to the measurement of touch current at the product level to accommodate the introduction of new technology which changes touch current and exposes the user to this aspect of electric shock in some new way. If you are a designer of test equipment making this measurement or want to see the latest information regarding the measurement of touch current you should buy a copy of this standard. This new standard is now available from the IEC - either thru their website or paper copy. INFORMATION TECHNOLOGY / ELECTRICAL AND MAGNETIC MEASUREMENTS "IEC 60990 (1999-08) - Methods of measurement of touch current and protective conductor current" Defines measurement methods for d.c. or a.c. of sinusoidal or non-sinusoidal waveform, which could flow through the human body, andcurrent flowing through a protective conductor. The measuring methods recommended for TOUCH CURRENT are based upon the possible effects of current flowing through a human body. In this standard, measurements of current through networks representing the impedance of the human body are referred to as measurements of TOUCH CURRENT. These networks are not necessarily valid for the bodies of animals. The basic safety publication is primarily intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51. It is not intended for use by manufacturers or certification bodies. It has the status of a basic safety publication in accordance with IEC Guide 104. Milton Cox, Secretary of IEC Technical Committee 74 (Safety and energy efficiency of IT equipment), provides the following information on this new publication: "The second edition of IEC 60990 has been issued as an International Standard replacing the first edition issued as a technical report in 1990. Input from users of the technical report has resulted in the following principle changes included in the second edition: - provision of an earthing alternative for testing to accommodate some test situations. - provision of a more detailed description of the design and calibration of the measurement network - as a result the component tolerances have been deleted from the network diagrams. With the publication of the second edition, it is expected the use of the precise terms 'touch current' and 'protective conductor current' and the measurement techniques will be used more extensively by technical committees." ICS Codes: 17.220, 35.020 - TC 74 - 109 pp. - CHF 153.00 - - - - - Peter E Perkins Principal Product Safety Consultant Tigard, ORe 97281-3427 +1/503/452-1201 phone/fax p.perk...@ieee.org email visit our website: http://ourworld.compuserve.com/homepages/peperkins - - - - - - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Bonding Meter
Hi folks, can anyone recommend a meter for making resistance measurements as low as 1 milliohm? Thanks, Derek. - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
IEC 60990 Vs IEC 60950
All: I've just been emailed regarding a leakage current (oops, I mean touch current) standard, IEC 60990. We were going to purchase it, but when I looked at the touch current requirements in IEC 60950 3rd Ed (section 5.1), I found several references to IEC 60990--my questions are: --Are the "new" leakage current requirements found in IEC 60950 derived from IEC 60990? --Are there any notable differences between the two touch current requirements? Thanks. John Boucher Lucent Technologies - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: Modulations during Radiated Immunity Tests
Krzysztof, For question 2: EN50082-1:1998 "Electromagnetic compatibility - Generic immunity st7andard Part 1. Residential, commercial and light industry" and EN50082-2:1995 "Electromagnetic compatibility - Generic immunity standard Part 2. Industrial environment" Call for both AM80% modulation (over 80-1000MHz) and keyed carrier 50% duty cycle (at 900MHz +/- 5MHz) for the radiated RF immunity tests. Regards, Jeff Bailey EMC Technologist SST - A Division of Woodhead Canada Ltd. Phone: (519) 725 5136 ext. 363 Fax: (519) 725 1515 Email: jbai...@sstech.on.ca Web: www.sstech.on.ca All comments here are my own and do not necessarily express the views of SST. -Original Message- From: krzys...@polbox.com [mailto:krzys...@polbox.com] Sent: Friday, September 24, 1999 6:22 AM To: emc-p...@majordomo.ieee.org Subject: Modulations during Radiated Immunity Tests Importance: High Dear Group, My matter concerns different kinds of modulation used during radiated immunity tests. For instance: IEC 1000-4-3: 1995 describes 80%-depth Amplitude Modulation with a 1kHz sinwave, ENV 50204: 1995 describes keyed carrier modulation (on-off, duty cycle 50%). My question is: do you know any standards (international, national, technical documentations, etc.) which describes different kind of modulations than these above (for instance AM with squarewave or Frequency Modulation or other ways of carrier keying) during tests. Would you please give me the number and title of the standards, frequency range, test levels and, of course, parameters of modulation. The second question: do you know any product, product family and other standards which call AM80%1kHz modulation and keyed carrier - cycle duty 50%. Thank you, Krzysztof Sieczkarek Laboratorium Technik Automatycznej Identyfikacji Instytutu Logistyki i Magazynowania Poznan, Poland fax +48 61 8526376 http://www.ilim.poznan.pl/la/index_E.html - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: EN60950 - conduit entry dimensions
Looking at a knockout in a box for 20mm conduit, it seems to be 20mm. My technician, who was an electrician, has never come across 16mm conduit. I would have thought that if the OD was 16mm, and it was then threaded to take a nut, it would go thru a 16mm hole. regards, John Crabb, Development Excellence (Product Safety) , NCR Financial Solutions Group Ltd., Kingsway West, Dundee, Scotland. DD2 3XX E-Mail :john.cr...@scotland.ncr.com Tel: +44 (0)1382-592289 (direct ). Fax +44 (0)1382-622243. VoicePlus 6-341-2289. > -Original Message- > From: Jim Eichner [SMTP:jeich...@statpower.com] > Sent: 23 September 1999 18:49 > To: 'EMC-PSTC - forum' > Subject: EN60950 - conduit entry dimensions > > > Greetings all: In clause 3.2.2 allows the provision of knockouts, cable > entries, etc. in lieu of a non-detachable power cord for permanently > connected equipment. In Table 10, it lists the overall diameter of > conduit based on the number of conductors involved, up to 16A. > > In my particular application, there are 2 wires plus earth, and the > current (and the branch circuit protection) is less than 16A, so the > table tells me I need a knockout that can accommodate a 16.0mm O.D. > conduit. If things are done there anything like they are done here, > this 16mm conduit will be secured in a fitting of some sort, and the > knockout needs to be matched to the fitting, not the conduit (i.e. a > 16mm hole is likely too small). > > Is there a reference, or can anyone tell me, what the appropriate sized > hole will be? Is this standardized somewhere? > > Thanks in advance for your help, > > > Jim Eichner > > Senior Regulatory Compliance Engineer > Statpower Technologies Corporation > jeich...@statpower.com > http://www.statpower.com > Any opinions expressed are those of my invisible friend, who really > exists. Honest. > > - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Argentina
Our local office in Argentina asked IRAM and the Commerce Ministry about < 50 V products. Their reply is that for the time being, there will be no requirements under 50 v. - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Modulations during Radiated Immunity Tests
Dear Group, My matter concerns different kinds of modulation used during radiated immunity tests. For instance: IEC 1000-4-3: 1995 describes 80%-depth Amplitude Modulation with a 1kHz sinwave, ENV 50204: 1995 describes keyed carrier modulation (on-off, duty cycle 50%). My question is: do you know any standards (international, national, technical documentations, etc.) which describes different kind of modulations than these above (for instance AM with squarewave or Frequency Modulation or other ways of carrier keying) during tests. Would you please give me the number and title of the standards, frequency range, test levels and, of course, parameters of modulation. The second question: do you know any product, product family and other standards which call AM80%1kHz modulation and keyed carrier - cycle duty 50%. Thank you, Krzysztof Sieczkarek Laboratorium Technik Automatycznej Identyfikacji Instytutu Logistyki i Magazynowania Poznan, Poland fax +48 61 8526376 http://www.ilim.poznan.pl/la/index_E.html - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
