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)"
>To: "'EMC-PSTC Internet Forum' (E-mail)"
>Subject: Isolation methods for surge immunity tests
>Date: Fri, Oct 26, 2001,
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 paper
- Original Message -
From: "Nick Rouse" <100626.3...@compuserve.com>
To: "WELLMAN,RON (A-PaloAlto,ex1)"
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 dangers or having
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 Jo
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'; wo...@senso
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
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 p
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 alwa
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
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 abl
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 so
>-Original Message-
>From: Colgan, Chris [mailto:chris.col...@tagmclaren.com]
>Sent: Friday, October 26, 2001 7:43 AM
>To: 'am...@westin-emission.no'; emc-p...@majordomo.ieee.org
>Subject: RE: FDA
>
>
>
>The very basic difference is that the FDA are safety related
>and the FCC EMC
>rela
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 [mailto:m...@california
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 o
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
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 subscripti
GO FISH!
- Original Message -
From: Gary McInturff
To: ; ;
Cc:
Sent: Friday, October 26, 2001 10:42 AM
Subject: 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.pac
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
T
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 60950
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
A
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
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 [mailto:chris.col...@tagmclaren.c
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 t
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
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: emc-p...@maj
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
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"
Reply-To: "Colgan, Chris"
To: emc-p...
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 equipments
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,
+
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: o
Hi Nick,
A visit to the Safety Link (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, and another)
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 sit
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 | Desig
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; wo...@sensormatic.co
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 symbo
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 sho
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: http://www.ewh.ieee.org/soc/emcs/pstc
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 oth
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 ...
Bes
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
* Mailto:chris.col...@tagmclare
"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
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 scop
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 paramete
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 kno
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.
>-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
>connect
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 co
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 Nort
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 wh
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