voltage on Neutral line
Hello everyone, What voltages can I expect on the Neutral (referenced to ground) line in various countries and connection systems? Is there a limit on how high the voltage may be, both in normal and fault conditions? thanks in advance, Moshe Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-54-881334 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 29/6/99 Time: 0:08:41 - 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: FCC part 15 text (part 18 too?)
Is the same labeling applicabler to part 18 ? thanks in advance Moshe Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-52-941200 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 12/4/99 Time: 22:35:17 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ - 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, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
UL 1581
Hello everyone, Can someone enlighten me about this standard? Is it related to cables - flammability? How is it related to other standards? thanks, Moshe Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-52-941200 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 22/3/99 Time: 20:10:38 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ - 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, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
High voltage fuse and holder
Hello everyone, I need fuses and fuse holders for 10kV line. Can someone tell me who is making these (or what are other altenatives to current limiting on high voltage lines)? thanks in advance, moshe Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-52-941200 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 8/3/99 Time: 22:50:47 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ - 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, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
LED safety
Hello everyone, Can someone enlighten me on the status of safety of using LED's as indicators. Are they still to be suspected as radiation sources (60825) and what should I do in the design (?) to prove them safe? thanks in advance, Moshe Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-52-941200 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 8/3/99 Time: 22:48:25 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ - 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, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: FCC exemptions
Thanks Lyle and everyone, The answer seems to be not in part 18 but in the detail of the OET document. It seems the intention was to exempt maintenance, research, evaluation, simulation, and other analytical or scientific applications. Whatever that might mean. In some cases the same device (e.g. a scanner) could be for testing something or producing something. It is still something which may be open to argument, and since FCC is a federal regulation, the argument could start when the device is introduced into the US (customs?) Did anyone experience such an argument versus FCC? thanks again, Moshe Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-52-941200 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 13/1/99 Time: 22:40:49 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ - 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, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
FCC exemptions
Hello everyone, 47CFR part 15 (15.103 item C) states that A digital device used exclusively as industrial, commercial, or medical equipment is exempt from the specific technical standards. 1. Can someone give a rational explanation to this exemption? 2. I have an industrial product which automatically inspects PCB panels for defects. Is this product exempt from class A limitations? In what way is such a product different in emissions from a non-test product such as a scanner. 3. If I take advantage of this exemption, where can I expect trouble (if any)? thanks in advance, Moshe Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-52-941200 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 12/1/99 Time: 20:48:48 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ - 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, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Mains/emergency labels
Hello everone, I have a question related to products under the machinery directive: We have a mains switch and an emergency switch on a machine. The testing agency insists these should be marked in words near the switches. (Of course that would be a different marking in every geopgraphical location depending on the local language) This requirement is obviously a problem, and we are not sure it is well founded. We would much rather settle for an icon type of marking or no marking (i.e. the emergency switch is obviously a red mushroom type) Please comment on this from your knowledge and experience thanks and happy holidays Moshe Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-52-941200 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 17/12/98 Time: 18:29:41 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ - 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, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Suppressor - ungrounded (more clarification)
Hello again, In a telecommunication device I need to connect a transient suppressor from the phone line to the metal chassis, which is not safety grounded. (I believe this is defined a class II device). In response to where will the transient go?: the assumption is the chassis has enough capacitance to ground (and possibly some conductance which cannot be relied upon for safety purposes), so that the transient suppressor is effective. A solution of connecting two suppressors in series to bridge the reinforces insulation was suggested. (i.e. a single failure shall not cause a hazard). I would rather have one suppressor connected in series with a Y capacitor. Any ideas? thanks in advance, moshe Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-52-941200 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 9/11/98 Time: 17:55:05 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ -End of Original Message- Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-52-941200 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 10/11/98 Time: 21:37:03 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/
RE: Suppressor - ungrounded (clarification)
In response to where will the transient go?, ofcourse the assumption is the chassis has enough capacitance to ground (and possibly some conductance which cannot be relied upon for safety purposes), so that the transient suppressor is effective. At least that's how I understand it. Moshe Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-52-941200 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 9/11/98 Time: 22:59:46 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ - 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, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Suppressor - ungrounded
Hello everyone, In a telecommunication device I need to connect a transient suppressor from the phone line to the metal chassis, which is not safety grounded. (I believe this is defined a class II device). Are there any special considerations / limitations in this condition? thanks in advance, moshe Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-52-941200 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 9/11/98 Time: 17:55:05 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ - 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, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
machinery directive related questions
Hello Everyone, here are 2 questions: 1. Is Risk/hazard Analysis required as part of formal documentation (TCF?). Which standard defines the format of the analysis? 2. The machine complies with ESD (up to 8KV) immunity, but still I have safety related incidents at customer sites, which are obviously related to ESD (they are simulated at 10KV). What are my options? Should I do nothing? Should I fix the design (up to ?KV)? Should I just document the issue, require antistatic carpets/humidifiers etc from the user? Thanks in advance Moshe Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-52-941200 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 2/11/98 Time: 19:58:48 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ - 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, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
EMC requirements for cellular site equipment
Hello Everyone, I'm looking for the list of standards relevent for EMC of a piece of equipment residing in a cellular phone site. It is not connected to phone lines, just to inside the room monitoring (e.g. battery voltage, temperature etc). It is powered from battery power. What would be EMC requirements in the US and in Europe? I would assume FCC class B(?), GR1089, EMC directive, ETS 300 (?) thanks in advance, Moshe Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-52-941200 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 18/10/98 Time: 21:11:10 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/
GR1089
Hello everyone, Where can I get the text (or a summary) of the GR1089? Is it available on the Web? I would think the customer (bell?) would have an interest to post it on the web for every potential supplier(?) thanks in advance Moshe Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-52-941200 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 28/9/98 Time: 0:24:18 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/
cellular phone supply system
Hello everyone, I'm trying to find out which regulations are applicable to a system which is located in cellular phone antenna sites. The system is used for charging the batteries (48V, several hundred amps), and monitoring generally the status in the site (e.g. temperature, battery status). The system is to be marketed in Europe and the US. It is not directly connected to any phone lines. I'm sure that in this area there are also requirements by specific customers. What I'm looking for are the general CE and US safety and EMC (and possibly other) requirements. thanks in advance for your response Moshe Valdman PS Is this environment considered CO? Do NEBS requirements (and which ones) apply? Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-52-941200 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 24/9/98 Time: 21:45:16 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/
Y capacitors on 60VDC supply
Hello everyone, I need to put capacitors to gnd on the 60VDC nominal (could go up to 74V) supply inputs of a box located inside a CO. I assume, since the 60V is to be isolated from the low voltage and ground, and since it is a mains input, I need Y capacitors. My questions: 1. Does these need to be Y1,Y2..or Y4 caps? (i.e. do I need reinforced insulation?) 2. The caps are needed for suppressing 1000V 1 microusec rise time pulses. On the other hand, their data sheet claims just 200V per microsec. Are they worth using? regards, Moshe Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-52-941200 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 12/8/98 Time: 18:52:45 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.com with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, ri...@sdd.hp.com, or roger.volgst...@compaq.co (the list administrators).
IEC1010 / UL3101 - components
Hello Everyone, Thanks for your replies on the IEC1010 thread. I have some more questions: 1. What would be required (by UL and CSA) from components (capacitors, resistors) bridging BASIC INSULATION? Should they be high integrity even though if they fail (single fault) there's still grounding of accessible parts to protect the operator. 2. Which components would typically have to be high integrity and how can they be proven such (e.g. conform to some UL standard, pass a test?) 3. What are the differences between UL3101 and UL3111? thanks Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-52-941200 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 31/5/98 Time: 13:33:18 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/
FW: Fwd[2]:UPS specs
Sorry if you get this message twice. I did not receive it back from the list-server, so I guess it just didn't come through. -- Hello everyone, I am using an APC SmartUPS 1400RM (its a 1400VA 950W 110V/220V unit which has either 4 or 6 outlets on the back) for a medical device and I'm trying unsuccessfully to get some technical answers from them: 1. Is there any limitation in drawing current from one of the several outlets at the back of the unit?(i.e. can I draw all the power from just one of the 6/4 outlets?) 2. Is the UPS tested for the power harmonics / power factor correction EN61000-3-4 ? (I guess this relates to the 220V model - I'm using both the 110V and 220V models) It's probably an issue only while loading the batteries. 3. If the batteries are empty and I'm operating the UPS with my normal load, how much current would battery loading add to the mains current? thanks in advance for any input, Moshe Valdman -End of Original Message- Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 972-52-941200 Telefax: 972-3-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 23/3/98 Time: 23:44:27 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/
modeling RFI sources randomness
Hello everyone, As we know, while measuring RFI generated from a product at a specific frequency, we get randomly changing amplitude (and I guess phase is also changing with time). This is why peak, average and quai-peak are different. On the other hand, the sources of interference (e.g. conductors running clock signals) are fixed and one would expect them to radiate a fixed signal. What is the explanation for this effect? (I.e. is there a model describing what influences the radiation generated?) Was there academic work in this area? thanks - Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 052-941200 fax: 03-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 13/9/96 Time: 22:02:44 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ -
Consultant code of conduct
Hello all, Many of us are full (or part time) consultants. Maybe you have come across a document which could be called 10 commandments of a consultant or Consultant ethics etc. Do you think there should be such a guide, and if so, do you think you could contribute to its contents? (I'm obviously interested in such a guide for the EMC, safety, quality, reliability areas) thanks in advance for any input moshe valdman - Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 052-941200 Fax: 03-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 20/07/97 Time: 22:29:34 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ -
reduction of leakage current
Hello all, Assuming the power supplies and line filter I'm using cannot be changed, and I have to reduce the input leakage current to ground, what are my options? (if any) thanks in advance - Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 052-941200, 03-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 15/07/97 Time: 22:04:40 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ -
RE: Interlock - PCB Spacings -- OPINION PLEASE
Yisrael, 1. I guess the main issue here is reliability: i.e. can it be proven that a certain spacing or PCB construction can lead to a reliability high enough for an interlock? Is this correct? If so, maybe someone can supply numbers to expected reliability of PC traces. I would suspect the chance for an OPEN (e.g. because of SMT component soldering problem + thermal cycling) is even higher than a short through the solder mask. 2. A suggestion: if the interlock action is based on a requirement that every several miliseconds a pulse is supplied through the interlock circuit (like some watchdog timers work), could this lead to a design which is insensitive to shorting or opening the interlock lines? Good luck and have fun moshe - Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 052-941200, 03-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 23/06/97 Time: 22:18:17 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ -
RE: max. case temp. and burn injury risk
Arlen, the major standards (IEC 950, IEC 1010) contain max temp requirement for operator accessible parts. The temp depends on the part material: a heat conductive part (e.g. metal) would be required to be at a lower temperature than a plastic part. If you have the specific details I'll get you the exact temp. good luck - Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 052-941200, 03-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 19/06/97 Time: 23:15:51 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ -
FW: 950 amendment 4
Sorry if I'm repeating myself, I think this didn't get through the previous time. Hello again, as we know, IEC950 amendment 4 is out for some time. Can someone please send a note of the changes (DELTA) it contains relative to the previous version? thanks - Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 052-941200, 03-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 16/06/97 Time: 21:47:37 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ -
FW: RFI receiver
It seems this didn't go through the first time (sorry if you already got it) Hello everyone, I've been offered a used ICOM IC - R1 receiver. I want to use it for preliminary radiated evaluation. (Just to know if I have emissions in certain frequencies) Does anyone have experience with it? Can this receiver do the job? How much should it cost? thanks - Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 052-941200, 03-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 14/06/97 Time: 23:53:56 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ -
950 amendment 4
Hello again, as we know, IEC950 amendment 4 is out for some time. Can someone please send a note of the changes (DELTA) it contains relative to the previous version? thanks - Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 052-941200, 03-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 16/06/97 Time: 21:47:37 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ -
RFI receiver
Hello everyone, I've been offered a used ICOM IC - R1 receiver. I want to use it for preliminary radiated evaluation. (Just to know if I have emissions in certain frequencies) Does anyone have experience with it? Can this receiver do the job? How much should it cost? thanks - Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 052-941200, 03-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 14/06/97 Time: 23:53:56 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ -
frequency scanner for EMC
Hello everyone, (sorry if the message is repeated unnecessarily) I'm interested in using a frequency scanner as a low cost EMI sniffer. Where can I buy one? (I would probably have to do this through mail order/web order) Can someone recommend a source? thanks in advance - Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 052-941200, 03-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 15/05/97 Time: 23:40:45 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ -
machinery directive forum / list server
Hello everyone, does anyone know about a an information source/list server specialising in the machinery directive? Do not be offended, but I did receive a considerable amount of information re ergonomics from a (non emc-pstc) guy who works with the machinery directive. No one referred to this info on the emc-pstc. I will prepare a summary ASAP of course. thanks - Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 052-941200, 03-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 13/05/97 Time: 0:00:51 You are most welcome to visit my homepage at: http://www.geocities.com/CapeCanaveral/5233/ -
FW: RE: Ergonomic requirements
What is the significance of legal requirement in Germany at a time that all EC countries are required to accept CE marked products? Are there many manufacturers who still apply TUV or VDE marks?(for products which only require self declaration). What would be the motivation to do this? thanks in advance for your comments - Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 052-941200, 03-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 03/04/97 Time: 23:03:40 - *** --- On Tue, 1 Apr 1997 09:07:00 -0500 WOODS, RICHARD wo...@sensormatic.com wrote: Compliance of workstations with ZH-1 is still a legal requirement in Germany. TUV and VDE still require testing to the standard to obtain their approval mark. -- From: mvald...@netvision.net.il To: emc-p...@ieee.org Subject: Ergonomic requirements List-Post: emc-pstc@listserv.ieee.org Date: Tuesday, April 01, 1997 1:36AM Hello everyone, does anyone happen to know where I can find information on ergonomics standards? (e.g. EN 614 ?) Which directives/standards require ergonomic issues? (I recall TUV used to require some color of product and size of letters but these are probably no longer relevant in the times of self declaration) thanks and a happy april 1st - Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 052-941200, 03-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 31/03/97 Time: 22:36:42 - -End of Original Message- - Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 052-941200, 03-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 03/04/97 Time: 22:58:47 -
Ergonomic requirements
Hello everyone, does anyone happen to know where I can find information on ergonomics standards? (e.g. EN 614 ?) Which directives/standards require ergonomic issues? (I recall TUV used to require some color of product and size of letters but these are probably no longer relevant in the times of self declaration) thanks and a happy april 1st - Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 052-941200, 03-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 31/03/97 Time: 22:36:42 -
Acoustic noise requirements
Hello again, I happened to find acoustic noise limits in the IEC 1010-1 (lab equipment safety). Do you know of other standards \ directives with acoustic limits? Are there standard ways of measurement? (sound power, sound pressure, spectrum..) thanks - Name: moshe valdman E-mail: mvald...@netvision.net.il Phone: 052-941200, 03-5496369 List-Post: emc-pstc@listserv.ieee.org Date: 31/03/97 Time: 22:42:57 -
FW: RE: Taiwan EMC update
Sorry, I'm resending this. It seems it didn't go through. ---Original Message--- Hello everyone, the info about Taiwan is very interesting. Can you please also specify re the levels (i.e. do they require class A or class B for ITE)? thanks - Name: moshe valdman E-mail: mvald...@mail.netvision.net.il List-Post: emc-pstc@listserv.ieee.org Date: 01/18/97 Time: 18:40:55 This message was sent by Chameleon - --End of Original Message--
RE: IEC1000-3-2 (SMPS)
Hello Fred, it would help to get some more details: like what power are these power supplies using. If it's low enough maybe they are exempt. Also, what type of waveshape do you have? Can you avoid the class D? Several months ago there was some discussion here on ways to cheat on the harmonics requiremnts. Maybe you can get the conference history at RCIC (the web site). good luck - Name: moshe valdman E-mail: mvald...@mail.netvision.net.il List-Post: emc-pstc@listserv.ieee.org Date: 01/10/97 Time: 17:34:28 This message was sent by Chameleon -
