Re: Isolation methods for surge immunity tests

I don't know how the laptop and EUT communicate, but my Fluke 97 Scopemeter uses an opto-isolated RS-232 serial link. -- From: Biggs, Daniel (IndSys, GEFanuc, NA) daniel.bi...@gefanuc.com To: 'EMC-PSTC Internet Forum' (E-mail) emc-p...@majordomo.ieee.org Subject: Isolation methods for

RE: RE: Fish paper

You have to be kidding me -Original Message- From: Pryor McGinnis [mailto:c...@prodigy.net] Sent: Friday, October 26, 2001 1:24 PM To: Gary McInturff; peter_denea...@atg.pacsci.com; sco...@world.std.com; wo...@sensormatic.com Cc: emc-p...@majordomo.ieee.org Subject: Re: RE: Fish

Fw: skinny power cords.

- Original Message - From: Nick Rouse 100626.3...@compuserve.com To: WELLMAN,RON (A-PaloAlto,ex1) ron_well...@agilent.com Sent: Friday, October 26, 2001 9:52 PM Subject: Re: skinny power cords. Earlier on in the thread it was not about arcing across the pins of a plug but about the

RE: FDA

As with all things regulatory there are exceptions. The FDA also test certain types of Medical Devices, and LASERs - we had a class III LASER for a portable CDR/W. Gregg -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of

RE: A Fish by any other name would smell as sweet... Was RE: RE: Fish paper

Elephant hide, huh? I hear elephants have a really dense hide. Sort of a packy-dermis Please don't boo have a great weekend guys! -Original Message- From: Gregg Kervill [SMTP:gkerv...@eu-link.com] Sent: Friday, October 26, 2001 2:06 PM To: 'Estrella Gil-P19838';

Re: skinny power cords.

Robert Macy wrote Anyway, a little damn fuse in the plug would not have helped in this circumstance, complete waste of time, much like the main breaker was. No the fuse in UK plugs would not have helped in this case but the 34mm of creepage distance between the pins that you get in most

Isolation methods for surge immunity tests

We are testing a comm line for 61000-4-5 and are using a laptop PC for support equipment (EUT will be talking to the PC). Do any of you know what could be used to isolate the PC from the surge being applied to the EUT comm line? Are opto-isolaters typically used for this purpose, and if so, can

CISPR 13, EN 55013

Assembled Experts, A NASA colleague of mine has EN 55013 test results on an electronic keyboard. The test results are a graph of dBpW vs. frequency, with a conversion chart for getting from measured data in dBuV to dBpW to be plotted against the limit. I have a 1975 version of CISPR 13 and can

What's the Skinny on IEC60799 for Power Cords?

Sorry, a completely different issue. Can anyone explain the relevance of IEC60799 with respect to ITE detachable power supply cords? This standard is not referenced in IEC60950, however, it is in the OJ. I don't have this document, so I don't know what is specifically in the scope. I have

Request for Input - Third Party Request

We are testing 2 coil windings (at a same time) for resistance using 4 wires Kelvin connection. Acceptable (Pass) Value ranges for the parts are: Part A 2.3 - 2.7 Ohm Part B 5.4 - 5.8 Ohms. We want to know if the part is within (good) these ranges or out (bad) of these ranges. We should be

Arc Fault Interrupters are Next

This is what happens when politicians start practicing outside the scope of their abilities. An arc fault interrupter instead of a plug containing a substantial inter support? - as the European plugs have had as long as I can remember. We have no insertion extraction force specification for

Re: skinny power cords.

I feel like jumping in on this very interesting and enlightening thread. As it reinforces a few issues I have often had to explain to the various design engineers and gives me more ammunition to support the need for fault testing. Just because a product is UL approved does not mean it is safe

RE: skinny power cords.

Robert Know that even UL Certified extension cords are for temporary use only. They are not to be plugged into an appliance and left undisturbed for a long period of time. Greg Nielsen Compliance Engineer Set Engineering, Inc. -Original Message- From: Robert Macy

RE: A Fish by any other name would smell as sweet... Was RE: RE: Fish paper

It's easy - he hides in his trunk. -Original Message- From: Estrella Gil-P19838 [mailto:gil.estre...@gd-decisionsystems.com] Sent: Friday, October 26, 2001 1:16 PM To: 'Gregg Kervill'; wo...@sensormatic.com; emc-p...@majordomo.ieee.org Subject: RE: A Fish by any other name would smell as

Re: RE: Fish paper

The entire discussion is a Red Herring! - 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

Re: RE: Fish paper

GO FISH! - Original Message - From: Gary McInturff gary.mcintu...@worldwidepackets.com To: peter_denea...@atg.pacsci.com; sco...@world.std.com; wo...@sensormatic.com Cc: emc-p...@majordomo.ieee.org Sent: Friday, October 26, 2001 10:42 AM Subject: RE: RE: Fish paper Okay, I've pretty

A Fish by any other name would smell as sweet... Was RE: RE: Fish paper

Just to cause a minor spin to this thread - We used a thin card (about 0.01)that we called Elephant Hide. G -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of wo...@sensormatic.com Sent: Friday, October 26, 2001 7:57 AM

RE: IEC 60950-1 released

Looks like someone will have to bite the bullet and buy a copy... Ghery Pettit Intel -Original Message- From: Momcilovic, Nick [mailto:nikola.momcilo...@qtiworld.com] Sent: Friday, October 26, 2001 9:15 AM To: 'am...@westin-emission.no'; emc-p...@majordomo.ieee.org Subject: RE: IEC

IEC International Electrotechnical Vocabulary (IEV)

This is great the IEV is now online and freely accessible: http://domino.iec.ch/iev/iev.nsf/Welcome/ Those guys on the TCs will need to be even more careful now that I can figure out what they mean by that certain word they used... -doug --- Douglas E. Powell, Compliance Engineer

RE: IEC 60950-1 released

This is all I could find on the IEC website: This first edition of IEC 60950-1 (10-01) cancels and replaces the third edition of IEC 60950, issued in 1999, and constitutes a technical revision Sincerely, Nick Momcilovic Product Safety Coordinator Engineering Technical Services QTI N64W23110

RE: FDA

How about trying the basics, definitions: FDA = Food Drug Administration FCC = Federal Communications Commission I think that's a pretty good indication of the differences. John Juhasz Fiber Options Bohemia, NY -Original Message- From: Colgan, Chris

RE: FDA

Hi, In the USA, it is the FDA. For most medical products, the FDA determines that your product is Substantially Equivalent to a legally marketed device. This is the FDA 510(k) process. They issue you a letter that allows you to legally market the device. For EMC, the FDA usually wants to see

RE: FDA

The very basic difference is that the FDA are safety related and the FCC EMC related. Both have very comprehensive websites http://www.fda.gov/ http://www.fcc.gov/ Regards Chris Colgan Compliance Engineer TAG McLaren Audio Ltd The Summit, Latham Road Huntingdon, Cambs, PE29 6ZU *Tel: +44

RE: RE: Fish paper

Okay, I've pretty much Haddock! - I'm going to Ivars for fishpaper and chips! Gary -Original Message- From: peter_denea...@atg.pacsci.com [mailto:peter_denea...@atg.pacsci.com] Sent: Friday, October 26, 2001 5:36 AM To: sco...@world.std.com; wo...@sensormatic.com Cc:

Re: FDA

Not a dumb question at all, the FDA sets performance for medical equipment and that includes EMC performance. My understanding at the present time is that requirements are a smorgasbord of commercial (CE/RE) and platform style (CI/RI) requirements. By platform I mean tests derived for

RE: skinny power cords.

I think the answer to the problem exists. The 2002 version of the National Electric Code will require Arc Fault Interrupters in bedrooms. See the link below from the CPSC for details. http://www.cpsc.gov/cpscpub/pubs/afci.html From: Colgan, Chris chris.col...@tagmclaren.com Reply-To:

Re: SV: Aircrafts

In the USA qualification of avionics to RTCA/DO-160 is required for type certification and it is type certification that must be achieved before using equipment on a/c. I expect that whereas in the US the FAA performs this function, in Europe it is the JAA, and the CE process has nothing to do

RE: skinny power cords.

Hello all, Earlier on in this thread it was eluded that this problem was leading to the need of fused power plugs, similar to what is done in the UK. However, based on the analyses of several people, I do not see how a fused plug would of prevented the failure that Robert experienced. Regards,

IEC 60950-1 released

Safety folks, The safety standard IEC 60950-1 (Information technology equipment - Safety - Part 1: General requirements) was released by IEC on October 25th 2001. Is this a new version of the existing IEC60950:1999 ? Best regards Amund Westin, Oslo/Norway -Opprinnelig melding- Fra:

Re: Safety warning symbols

Hi Nick, A visit to the Safety Link www.safetylink.com (and then a search with your browser's Find function - Control F - in many cases - on the terms markings or symbols will turn up links to at least 4 locations on the net, including a functioning IEC site, the Cellotape site, the Hazcom site,

Re:RE: Fish paper

Holy mackerel! I hake to add to this thread but I really have to crab. What kind of grouper is this? Deep down in my sole I belive Cod didn't intend email to be used for this kind of carp, its drum. I think its a pain in the bass and its giving me a haddock. Please cut it trout, if for no

RE: Safety warning symbols

Design guide and Safety Labels at http://www.cellotape.com/ -Original Message- From: wmf...@aol.com [mailto:wmf...@aol.com] Sent: 26 October 2001 12:17 To: jwise...@printronix.com; nick.willi...@conformance.co.uk; emc-p...@majordomo.ieee.org Subject: RE: Safety warning symbols That

Source of Compliance Label Icons

All, Check out www.cellotape.com once in the website, go to their compliance label design guide. They have pdf's of about 100 different compliance symbols; including compliance marks, warning symbols ... I went there to get some information, thought it was worth sharing. Chris Maxwell |

RE: RE: Fish paper

I don't know about the rest of you, but I'm having a whale of a time. Richard Woods Sensormatic Electronics -Original Message- From: peter_denea...@atg.pacsci.com [mailto:peter_denea...@atg.pacsci.com] Sent: Friday, October 26, 2001 8:36 AM To: sco...@world.std.com;

RE: Safety warning symbols

Here is a place where you can buy them. http://www.hazcomsys.com/ Richard Woods Sensormatic Electronics -Original Message- From: Nick Williams [mailto:nick.willi...@conformance.co.uk] Sent: Thursday, October 25, 2001 5:31 PM To: emc-p...@majordomo.ieee.org Subject: Safety warning

EMI filter hazards

Many of us incorporate these little babies in our designs, and good design practices require their placement at the enclosure threshhold to prevent re-radiation. This sometimes means the filter is upstream of the/any mains switch or breaker. In these cases, what can be done to mitigate the

RE: Safety warning symbols

That site has been ineffective for several months. Anybody know of a free alternative? --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at:

FDA

Hi all, What is the basic differences between FDA and FCC ? Don't laugh, yes I know it is a silly question, but if you want to certify medical equipment, are the requirements covered in the FDA or in the FCC regulations ? As you understand, within this field, I'm a really novice ...

RE: skinny power cords.

Far be it from me to criticize UL Listed products, or UL standards, but it seems to me that the plug in question was not suitable for its intended use. I can recall conducting a humidity test on one of our products, and at the conclusion of the test, it failed a dielectric test, and I traced the

RE: skinny power cords.

I used to curse the size of our British BS1363 plugs and socket outlets. I won't be so hasty in the future. Chris Colgan Compliance Engineer TAG McLaren Audio Ltd The Summit, Latham Road Huntingdon, Cambs, PE29 6ZU *Tel: +44 (0)1480 415 627 *Fax: +44 (0)1480 52159 *

SV: Aircrafts

So, RTCA/DO-160 applies for US/Canada and I assume it is valid for many other countries worldwide. In Europe the EMC directive does not apply (ref EMC guidelines). But which relevant directives should be used in order to affix the CE-mark ? Only LVD if it is supplied with voltages within the

Re: DC voltage ratings

Peter, You are correct and thanks for the clarification. In my defense, allow me to point out my use of the word 'can' in my statement. Back to your clarification - I know that some (and not all as you correctly point out) European telcos use 60Vdc(72 charging). The rest to the best of my

Re: Shrunk-die power MOSFET's and compliance

I worked with power MOSFETs in the past and found that the reverse recovery characteristics (soft versus abrupt) correlated with emissions, but we could not derive a quantitative acceptance criteria. Vendors could easily specify and sort by reverse recovery time, but that was a different

RE: skinny power cords.

This subject of reliance on branch circuit protection for loads has been discussed for a long time and involves a lot of historical tradition and code and standards activities. The following is my understanding based on some code committee activities, but I have not researched this historically.

RE: MIL-STD for crimped terminals on wires?

-Original Message- From: Scott Lacey [mailto:sco...@world.std.com] Sent: Thursday, October 25, 2001 3:16 PM To: emc-p...@ieee.org Subject: MIL-STD for crimped terminals on wires? To the group, Hopefully someone can tell me number of the MIL-STD ocument for crimped connections on

Re: skinny power cords.

Scott, Defective cords have been around long before someone got the idea to manufacture them offshore. How would you be able to tell, without using the Hershey criteria, if a power cord is any good? Dan Kwok Scott Lacey wrote: Jim, It seems that some of the offshore manufactured cords

Re: 120V Ground Faults

Michael, The arcing was between hot and neutral. GFCI outlets would have made no difference. - Robert - Robert A. Macy, PEm...@california.com 408 286 3985 fx 408 297 9121 AJM International Electronics Consultants 619

120V Ground Faults

Robert, From my experience, I think you will find that arcing ground faults are inherently high-resistance in nature and, while dramatic, do not necessarily pull significant amounts of current. Most 15 amp breakers will likely require several seconds/minutes to blow at 60/30 amps, which is

RE: Safety warning symbols

Nick, Try this website. It is a searchable version of IEC 417. http://w3.hike.te.chiba-u.ac.jp/iec417/ver2.0/html/index.html Josh Wiseman EMC/Product Safety Eng. -Original Message- From: Nick Williams [mailto:nick.willi...@conformance.co.uk] Sent: Thursday, October 25, 2001 2:31 PM

RE: Fish paper

RE: Fish paperSorry guys, but, after monitoring this thread it would take a mackerel to keep me out of it. I can't bass up an opportunity to join in even if it seems crappie to some. Let's hear from some of those who just perch here walleye'm in the mood for it. Otherwise the rest of us will wind

Re: skinny power cords.

Robert, It would seem this kind of problem may also happen without an extension cord. I know a fellow that used to unplug most of his appliances from the wall in anticipation of a lightning storm. I guess you can't be too careful.