I read in !emc-pstc that am...@westin-emission.no wrote (in LFENJLPMMJB
mhpeibnilaepjcbaa.am...@westin-emission.no) about 'SV: Selection of
Directives', on Sat, 5 Jan 2002:
I wish I had seen this magical matrix, but unfortunately I have not. I
assume that a matrix like this would be very
I read in !emc-pstc that cherryclo...@aol.com wrote (in
43.47bb025.29689...@aol.com) about 'EMC-related safety issues', on
Sat, 5 Jan 2002:
The one in a billion John refers to sounds very dramatic and difficult.
More dramatic than you 'infant daughter' and '40 mph past a school'?
I
I read in !emc-pstc that cherryclo...@aol.com wrote (in 132.6f59d2b.296
89...@aol.com) about 'EMC-related safety issues', on Sat, 5 Jan 2002:
Dear Cortland
People can't simply say: ordinary semiconductors won't demodulate RF
levels
produced by an unintentional radiator even the
I read in !emc-pstc that cherryclo...@aol.com wrote (in 92.1f676722.296
88...@aol.com) about 'EMC-related safety issues', on Sat, 5 Jan 2002:
I am truly sorry if I irritated you by misunderstanding your words, but I
took your posting to imply that electronic circuits which are not
The one in a billion John refers to sounds very dramatic and difficult.
So it may be helpful to refer to IEC 61508 which is a recently-published
'basic safety publication' covering The functional safety of electrical /
electronic / programmable safety-related systems
IEC 61508 uses the
In a message dated 04/01/02 19:31:51 GMT Standard Time, j...@jmwa.demon.co.uk
writes:
The trick, I believe, is not to be in that position in the first place.
Design your products using the latest safety knowledge and test them well
to
discover if they have any weaknesses you did not
Dear Cortland
People can't simply say: ordinary semiconductors won't demodulate RF levels
produced by an unintentional radiator – even the smallest amount of RF can
be demodulated – there are no hysteresis or threshold effects in a PN
semiconductor junction or FET that is biased into its
Dear Ken
That is exactly what I am saying: under the EU's Product Liability Directive
a company can be held liable for unlimited damages with no proof of
negligence on the manufacturer's part.
It is of course a valid management decision to ignore a market that is almost
as large as USA/Canada
Dear Ken
That is precisely the point I was trying to make: all companies (and people)
always weigh up all the costs and risks that they know about and act
accordingly.
The problem arises when certain risks are unknown or ignored, for whatever
reasons.
I see it as part of every engineer's job
Dear Ken
I am truly sorry if I irritated you by misunderstanding your words, but I
took your posting to imply that electronic circuits which are not designed as
RF receivers would not respond very well to radio frequencies.
My example was not intended to be a full answer to your example (there
Dear All
A page on our website www.cherryclough.com has a useful list of EU directives
relating to electronic products (and not just the CE marking ones) and the
URLs where they and lists of their relevant standards can be downloaded from.
Not every possible directive is covered, but I think
Hi Sam,
I wish I had seen this magical matrix, but unfortunately I have not. I
assume that a matrix like this would be very complex and comprehensive.
Example: An ITE would have to qualify for EMCD and maybe RTTE, maybe also
LVD if the voltages are within the scope and if it is placed in an
I read in !emc-pstc that John Shinn john.sh...@sanmina-sci.com wrote
(in 002401c19584$35f73660$0b3d1...@hadco.comsanmina.com) about 'EMC-
related safety issues', on Fri, 4 Jan 2002:
So where do I drill the hole in my fuel injection system?
You don't. You put a pint of water in the tank and a
I read in !emc-pstc that Ken Javor ken.ja...@emccompliance.com wrote
(in b85bb29d.c04%ken.ja...@emccompliance.com) about 'EMC-related
safety issues', on Fri, 4 Jan 2002:
My take on it is that rather than appease ridiculous demands, a
company ought to look at the profit vs. risk vs. cost
It is my understanding that the conversion factor converts the voltage
reading on a 50 ohm receiver to the amperage reading directly. In other
words, 1dbuV *is* 1dBuA and already takes into account the 50 ohm input
impedance.
Sadly, all this was written before advancements in electronics
Hi All,
I have a page on my website where I post both positions available and
persons looking for positions. I do this as a service (no charge for the
posting). Three new positions have been added in the last few days, one
this evening from Maryland. The direct URL of the page is:
Hi all
I got a question about the magnetic measurement per CISPR 15, it says that the
sensitivity of the current probe is 1V/A.
My interpretation is that X dBuV measurement you got from the EMI receiver,
corresponding to XdBuA, which is then compared to the limit, say 88dBuA at 50
kHz for
Hi Ken,
The reason that those companies stopped was because it was found
that there was mercury in the formulation of the vaccine. The mercury
had no other use other than stabilization. The mercury is known to
cause brain damage. Prior to around 1980, DPT was not given to infants.
The rise in
Doug,
For -48 Vdc equipment, the 3rd edition of CSA/UL 60950 gives a should in
Annex NAB.2 unless otherwise specified by the manufacturer...
It is worth a look.
taniagr...@msn.com
- Original Message -
From: Doug McKean dmck...@auspex.com
To: EMC-PSTC Discussion Group
Interesting to note that this country (USA) got started in part because of a
tax on tea. I think you are saying here that a company can be held liable
for unlimited damages with no proof of negligence on the manufacturer's
part. If I were a manufacturer I would simply not market to the EU.
on
My take on it is that rather than appease ridiculous demands, a company
ought to look at the profit vs. risk vs. cost to consumer and decide, heck,
it ain't worth it. Case in point on the news today I heard that DPT shots
are in short supply, because two companies quit making it. They quit
One sure way to REALLY irritate me is to twist my words and try to make me
look stupid (I do a fine job by myself on occasion and don't appreciate any
outside help). I did not say that pn junctions don't detect and rectify rf,
I said that the field intensities associated with unintentional
We need to separate specific regulation from general. The FCC does not care if
a radio front end is wide open, though
it now requires scanning receivers to have 38 dB image rejection. This does
not mean they have narrow front ends,
however. A SW receiver with a 75 MHz If may well have
So where do I drill the hole in my fuel injection system?
John
-Original Message-
From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Doug McKean
Sent: Friday, January 04, 2002 2:37 PM
To: EMC-PSTC Discussion Group
Subject: Re: EMC-related
As I recall, a tank of gasohol and a long trip down the freeway beforehand
was another method.
Of course it didn't work as well if you then got in a long waiting line for
the test.
-George S.
-Original Message-
From: Doug McKean [mailto:dmck...@auspex.com]
Sent: Friday, January
I've never had an NRTL actually tell me what the specific
domestic voltage *should* be. Either one is okay. I'm fairly
certain you could get by with 100-115 as well.
You probably know already, but keep in mind the primary
voltage range placed on the label of a product directly sets
the
Try starting with the following URL and drill downward for each directive
where you will find guidance documents and the standards listed.
http://europa.eu.int/comm/enterprise/newapproach/standardization/harmstds/re
flist.html
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