Dear John
Sorry to be so late replying.
I am pleased that you now understand the situation that I attempted to
describe earlier, where an HCMOS inverter with an unterminated input was the
cause of surprisingly powerful radiated emissions at 200MHz, due to an
unfortunate, unlikely, but not
Dear Bob
Sorry to be so late replying.
Thank you for this reference, I was unaware of it.
I shall add it to my list of EMC-related safety references.
If anyone wants a copy of my list, I'll be pleased to email it to them in
Word format.
If anyone knows of any books, articles, or papers on the
I read in !emc-pstc that Cortland Richmond cortland.richm...@alcatel.co
m wrote (in 3c438c09.7e606...@alcatel.com) about 'EMC-related safety
issues', on Mon, 14 Jan 2002:
A loop can indeed radiate harmonics, if it is a reasonable fraction of a
wavelength long. A very small loop, tuned to
I read in !emc-pstc that cherryclo...@aol.com wrote (in 14b.7351131.297
42...@aol.com) about 'EMC-related safety issues', on Mon, 14 Jan 2002:
I'm sure I said in my original posting on this example, that the HCMOS was
'hard switching' and not producing a sine wave. A hot device was, of
Dear Ken
Sorry to be so late replying, but I have been unable to read any of the
correspondence in this thread for a week.
In an attempt to spare the emc-pstc more of our arguing I will not reply in
detail to three of your emails, one from the 6th Jan, and two from the 7th
Jan, because they
Dear Ken
Sorry to have taken so long to reply to this.
I haven't been able to read any of the contributions for a week.
I have to say that I don't recognise myself, or the IEE's guide on EMC and
Functional Safety or the 30+ respected and senior engineers who contributed
to it, or the IEE
Dear Ken
Sorry to have taken so long to reply to this. Pressure of work has kept me
away from the thread for a week.
I don't know where you get your maths from.
The usual formula (commonly available in a number of variants) for the
radiated emissions E in V/m at 10 metres due to a common-mode
Dear John
Sorry to have taken so long to reply.
We were talking about safety-related systems.
The general approach is to add additional back-ups to the safety related
system to provide it with necessary reliability as far as safety is
concerned, as I had hoped the examples in the full version
Dear John
Sorry to have taken so long to reply.
We will have to disagree over the educational value of the EMC + Compliance
Journal's Banana Skins column.
If you haven't seen anything that was CE marked but which was obviously not
compliant, then I think you must be lucky.
As I mentioned
I read in !emc-pstc that Wan Juang Foo f...@np.edu.sg wrote (in
of20fd77f8.c4438312-on48256b3b.002ee...@np.edu.sg) about 'EMC-related
safety issues', on Tue, 8 Jan 2002:
EMI from the ASMD (anti ship missile defence) radar had cause
the communication equipment to be inoperable. During this brief
I read in !emc-pstc that Crabb, John jo...@exchange.scotland.ncr.com
wrote (in B6CD5947CF30D411A1350050DA4B75FF03C2338C@sgbdun200.scotland.n
cr.com) about 'EMC-related safety issues', on Mon, 7 Jan 2002:
Any suggestions how to overcome this ? My previous antique datalogger
didn't have
Regarding the snip below. The fact that it is a radio that is the victim is
still the salient factor here. The emissions in close to the lamp are
higher than at three meters, but only enough higher to affect a radio,
nothing else. Regarding the thermocouple based incubator issue (sensitivity
on
-
From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of cherryclo...@aol.com
Sent: maandag 7 januari 2002 12:49
To: ken.ja...@emccompliance.com
Cc: emc-p...@majordomo.ieee.org
Subject: Re: EMC-related safety issues
Sorry everyone!
When I
To: richwo...@tycoint.com; emc-p...@majordomo.ieee.org
Subject: RE: EMC-related safety issues
Hi Richard, Group
I agree that those requirements look safety related, but they
are strictly functional. The difference is subtle:
As this standard is concerned with equipment used
for safety purposes
has already been taken...)
Gert Gremmen
-Original Message-
From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of
richwo...@tycoint.com
Sent: maandag 7 januari 2002 14:13
To: emc-p...@majordomo.ieee.org
Subject: RE: EMC-related safety issues
I read in !emc-pstc that richwo...@tycoint.com wrote (in 846BF526A205F8
4BA2B6045BBF7E9A6ABC4FEA@flbocexu05) about 'EMC-related safety issues',
on Mon, 7 Jan 2002:
John, I have to disagree with your statement, As far as CENELEC is
concerned, it was a conscious decision not to incorporate 'EMC and
I read in !emc-pstc that Ken Javor ken.ja...@emccompliance.com wrote
(in b85e7016.c59%ken.ja...@emccompliance.com) about 'EMC-related
safety issues', on Sun, 6 Jan 2002:
Quote : Who would have expected an unterminated HCMOS gate to be
able to emit 2W at 200MHz?
Not me - 2 Watts of
Quote : Who would have expected an unterminated HCMOS gate to be able to
emit 2W at 200MHz?
Not me - 2 Watts of effective radiated power implies over 2.5 V/m at 3 m! I
guess I have a hard time believing that was transmitted from an HCMOS gate.
I think a little common sense will go a long way
QUOTE: And I don't think that 92dBuV/m is a high field strength to be
emitted by a PC placed nearby, or for a non-compliant laptop at 10 metres.
You may not think so, but I am sorry, the numbers just don't add up. 92
dBuV/m at 10 meters implies an effective radiated power of 5.3 mW. Consider
The question of ethics or morality is at the heart of this discussion which
makes it much more important than technical discussions about
electromagnetism, which is the ONLY reason I have pursued this so far. I
was critical of the IEE safety guide on MORAL grounds. It is part of the
morality
I abstracted the physical process and did not attach numbers. 80 dBuV/m is
orders of magnitude above RE limits. That is 10 mV/m.If you use the
worst case assumptions of IEC 1000-4-6 and associate an open circuit drive
potential numerically equivalent to the field intensity, but with a 150
I read in !emc-pstc that cherryclo...@aol.com wrote (in 14b.6d4a617.296
9c...@aol.com) about 'EMC-related safety issues', on Sun, 6 Jan 2002:
Dear John
The incubator I described was already on the EU market in the latter half
of
the 1990s, when I helped to test and fix it.
Ken, I believe other postings on this topic this weekend clearly show that
electronic circuits which were not designed as radio receivers can possibly
be interfered with by the emissions from products which meet FCC/CISPR 22
limits, for a number of possible reasons, especially when the product
Taking Toms' calculations a little further
Typical thermocouple sensors have output voltages in the range 3 - 50
microvolts per degree C. So to create a 60C error in a thermocouple-based
temperature control system (see my recent posting about the RF immunity of a
blood sample incubator)
Yes, John, you are quite right in both your comments as far as you go:
1) You are not the only person who can dramatise an issue so as to encourage
people to debate it;
2) If you sold a single electronic safety-related circuit with a failure
probability of 10^ -9 to 100,000 customers the
A) I don't agree with Ken that: Emissions from a laptop are naturally
(without suppression) on the order of 10 uV/m to 100s of uV/m.
Maybe IBM PC clone laptops use similar enough architecture and chipsets and
design techniques to be this consistent (I don't know) but I have seen the
following
Ken, can we take it that in the posting below you are agreeing that
interference with non radio-receiving circuits from what you meant by
unintentional emitters is a possibility, albeit a worst-case one?
If my reading above is correct, how can you then go on to say that
...unintentional
Dear John
In previous postings from Ken Javor and myself, I believe that Ken (who I was
replying to in the fragment below) has made it clear that what he is really
concerned with is the kinds of emissions controlled by CISPR 22 and Title
47, part 15B of the US Code of Federal Regulations (I
Dear John
The incubator I described was already on the EU market in the latter half of
the 1990s, when I helped to test and fix it.
And I'm sorry to disappoint but I have already experienced several similar
examples I could quote, such as the electric blanket that would change its
heat
My point was that only radios are sensitive to rf fields at the levels
controlled by FCC/CISPR22 and indeed, as Ing. Gremen pointed out, levels
well above the limits. Which means that the only rationale behind
FCC/CISPR22 is protection of radio broadcast reception. Period.
on 1/5/02 12:10 PM,
What an EMC engineer who understands the physics of field-to-wire coupling
would say is that the operation of non-antenna connected electronics
associated with one subsystem will not be degraded by close proximity with
the non-antenna connected electronics of another subsystem. Forget 10
meters.
Thanks for the correction. Medicine is not something I know much about.
The point remains that a huge benefit was derived from these vaccines which
were discontinued due to a very small fraction of bad reactions. Forum
members: when it turned out that a small number of people were killed or
The analytical portion of this post is, as the author stated, worst case. A
cable attached to a susceptible circuit picks up a common-mode potential,
which most likely drives a current on a shield if the the circuit is
sensitive. Then only the current multiplied by shield transfer impedance
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
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
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
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
possible mechanism? I don't.
--
From: Robert Macy m...@california.com
To: Pettit, Ghery ghery.pet...@intel.com, 'James Collum'
james.col...@usa.alcatel.com, emc-p...@majordomo.ieee.org
Subject: Re: EMC-related safety issues
Date: Thu, Jan 3, 2002, 3:25 PM
Perhaps, it merely interfered
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
04, 2002 2:37 PM
To: EMC-PSTC Discussion Group
Subject:Re: EMC-related safety issues
RE: EMC-related safety issuesKyle Ehler wrote:
Another point of trivia is that a fresh oil change and new air
filter
prior to having your vehicle smog tested will improve the emissions
results
Cortland Richmond wrote:
AIrbag testing? Well, since it costs about $US 1500 to replace them
(here),
I suppose there WOULD be a price hike!
A couple of kids were caught by the police in a parking lot.
Seems the fun thing to do to people's cars was to walk
around the parking lot with baseball
RE: EMC-related safety issuesKyle Ehler wrote:
Another point of trivia is that a fresh oil change and new air
filter
prior to having your vehicle smog tested will improve the emissions
results. At one time there was available OTC a fuel additive that
one
could deploy to further skew the
, January 03, 2002 10:09 PM
To: j...@jmwa.demon.co.uk
Cc: emc-p...@majordomo.ieee.org
Subject: Re: EMC-related safety issues
Hi John:
I've replaced the incandescent lamp on my bedside
table with a new energy-saving compact flourescent
lamp. With the lamp on, I cannot listen to even
-emc-p...@majordomo.ieee.org]On Behalf Of Cortland Richmond
Sent: Friday, January 04, 2002 12:54 PM
To: cherryclo...@aol.com
Cc: emc-p...@majordomo.ieee.org
Subject: Re: EMC-related safety issues
I don't believe this is what people are saying here. What they are saying
is, ordinary
I read in !emc-pstc that Cortland Richmond cortland.richm...@alcatel.co
m wrote (in 3c35ec35.5d1a...@alcatel.com) about 'EMC-related safety
issues', on Fri, 4 Jan 2002:
I don't believe this is what people are saying here. What they are
saying is, ordinary semiconductors won't demodulate
I read in !emc-pstc that Rich Nute ri...@sdd.hp.com wrote (in
200201041623.iaa13...@epgc264.sdd.hp.com) about 'EMC-related safety
issues', on Fri, 4 Jan 2002:
So, I am acting unreasonably by using a
CFL and a radio on my bedside table.
If we're being very meticulous, it is not unreasonable to
To: 'James, Chris'; 'Ken Javor'; Doug McKean; EMC-PSTC Discussion Group
Subject: RE: EMC-related safety issues
Chris,
Annual inspections of motor vehicles are done on a state by
state basis,
rather than as a national requirement in the U.S. Automobiles are
registered at the state level, so
Subject: RE: EMC-related safety issues
Sorry disagree about turn and brake lights not being in the same class.
Their very failure is often the reason for very serious accidents. I have
long wished that all car manufacturers had to by law fit bulb failure
warning devices to cars (but what happens
At 8:34 AM -0500 1/4/2002, Keith Armstrong wrote:
Does anyone else think that ordinary semiconductors doesn't respond to RF?
I agree that commonly used semiconductors have responses well into
the 100's of MHz.
How much of a problem this is will depend on the nature and function
of the
There is a difference between extending a warranty and being liable for
failure. If your seat belts fail some time
after the warranty is up, the manufacturer won't pay for fixing them on your
car. But the manufacturer may well be
held liable for the failure.
Cortland
Andrews, Kurt wrote:
AIrbag testing? Well, since it costs about $US 1500 to replace them (here), I
suppose there WOULD be a price hike!
One of the tests run on a modern, computerized auto when the ignition is
turned on is for airbag activation
circuitry.
Cortland
James, Chris wrote:
I don't
I read in !emc-pstc that cherryclo...@aol.com wrote (in 131.6a66623.296
70...@aol.com) about 'EMC-related safety issues', on Fri, 4 Jan 2002:
As I recall, the EU's Product Liability Directive (85/374/EEC amended by
99/34/EC) requires manufacturers to produce products that are: as safe as
people
I read in !emc-pstc that cherryclo...@aol.com wrote (in 17d.1b28bc2.296
70...@aol.com) about 'EMC-related safety issues', on Fri, 4 Jan 2002:
Does anyone else think that ordinary semiconductors doesn't respond to RF?
Your experience has been shared by thousands. The demodulation normally
occurs
Warranted parts for a car is a whole other discussion.
Warranties are simply for as long as the mfr/dealer want
to do the contract. I'm not sure if there's a law concerning
minimum time of warranty or if it's simply driven by the
free market.
Supplying a parts inventory by the car mfr is
I read in !emc-pstc that cherryclo...@aol.com wrote (in 167.698dddc.296
70...@aol.com) about 'EMC-related safety issues', on Fri, 4 Jan 2002:
As my paper at the IEEE's EMC Symposium in Montreal and my recent article
in
ITEM UPDATE 2001 show - at present EMC standards don't address
[mailto:ken.ja...@emccompliance.com]
Sent: 04 January 2002 02:40
To: Doug McKean; EMC-PSTC Discussion Group
Subject: Re: EMC-related safety issues
A signal light is easily replaceable in terms of time and money. Most
people don't use them (well, in good old Huntsville, AL, anyway, where a
favorite
No, it's simply that it isn't considered reasonable to have a radio and
a CFL in close proximity. If you want a lamp and a radio close together,
use an incandescent lamp.
That's the bottom line, isn't it?
Somebody has decided for me (in terms of
what is reasonable) that if I use a
: 614.846.6175
toll free: 800.848.4525
fax: 614.846.7791
http://www.tracewellsystems.com/
-Original Message-
From: Doug McKean [mailto:dmck...@auspex.com]
Sent: Thursday, January 03, 2002 5:43 PM
To: EMC-PSTC Discussion Group
Subject:Re: EMC-related safety issues
As I understand the way the civil law section of the EU's Product Liability
Directive operates (I am not a lawyer) it does in fact place the burden of
proof on the manufacturer, who is effectively considered 'guilty until proved
innocent'.
I also understand that any number of manufacturers can
Hey, Ken, let's try to be realistic here!
Sure - we should try to get laws we don't like changed, but that isn't going
to happen overnight and in the meantime we have to operate within the law as
it stands.
Or are you suggesting immediate insurrection by product manufacturers?
(Outlaw
anyone really see this as a remotely
possible mechanism? I don't.
--
From: Robert Macy m...@california.com
To: Pettit, Ghery ghery.pet...@intel.com, 'James Collum'
james.col...@usa.alcatel.com, emc-p...@majordomo.ieee.org
Subject: Re: EMC-related safety issues
Date: Thu, Jan 3, 2002, 3
-p...@majordomo.ieee.org
Subject: Re: EMC-related safety issues
Date: Thu, Jan 3, 2002, 12:22 PM
As engineers, we should consider the safety
implications of what we design, test or otherwise
work on. EMI is part of that. What is considered a
safety risk depends a great deal
...@emccompliance.com]
Sent: 04 January 2002 02:40
To: Doug McKean; EMC-PSTC Discussion Group
Subject: Re: EMC-related safety issues
A signal light is easily replaceable in terms of time and money. Most
people don't use them (well, in good old Huntsville, AL, anyway, where a
favorite bumper sticker
%jmwa.demon.co...@interlock.lexmark.com
| cc: emc-pstc%majordomo.ieee@interlock.lexmark.com (bcc:
George
| Alspaugh/Lex/Lexmark)
| Subject: Re: EMC-related safety issues
|
|
|
|
|
|
|
| Hi John:
|
|
|I've replaced the incandescent lamp on my bedside
|table with a new energy-saving
I read in !emc-pstc that Rich Nute ri...@sdd.hp.com wrote (in
200201032108.naa11...@epgc264.sdd.hp.com) about 'EMC-related safety
issues', on Thu, 3 Jan 2002:
Whine mode on: I want both on my bedside table, and
I want both to do all of their functions. This IS
not the usage contemplated by 3
I read in !emc-pstc that david_ster...@ademco.com wrote (in 2DF7C54A75B
dd311b61700508b64231002c5a...@nyhqex1.ademcohq.com) about 'EMC-related
safety issues', on Thu, 3 Jan 2002:
My copy of BS EN 50140-4:1996
50140-4? ENV50140 was an early version of EN61000-4-3 and is withdrawn.
--
Regards,
I read in !emc-pstc that Kevin Harris harr...@dscltd.com wrote (in
D886DC8708ACD3118A0500606DD5DA6328C655@DSC_MAIL) about 'EMC-related
safety issues', on Thu, 3 Jan 2002:
If the BSI site says that, then it is yet another proof of you can't always
believe what you read. :) My Aug 2001 version of
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Doug McKean
Sent: Thursday, January 03, 2002 2:36 PM
To: EMC-PSTC Discussion Group
Subject: Re: EMC-related safety issues
Rich Nute wrote:
EMC? Ha!
You raise a good point since the FCC legally can but
hasn't implemented an American version
Point taken Ken, but consider signal lights. They're
essentially safety devices and they're supposed to
be maintained on cars which have been transferred
amongst several owners and are decades old.
Same idea with windshields, I guess also.
- Doug McKean
I have it from a message on the r...@contesting.com list that Phillips bulbs
produce less RF noise than others.
I can't vouch for that, however.
Cortland
(What I write here is mine alone.
My employer does not
Concur, agree or else endorse
These words, their tone, or thought.)
Rich Nute wrote:
...@interlock.lexmark.com
cc: emc-pstc%majordomo.ieee@interlock.lexmark.com (bcc: George
Alspaugh/Lex/Lexmark)
Subject: Re: EMC-related safety issues
Hi John:
I've replaced the incandescent lamp on my bedside
table with a new energy-saving compact flourescent
lamp
: Thursday, January 03, 2002 11:46 AM
Subject: RE: EMC-related safety issues
I still have a hard time believing it was a compass that was affected by
a laptop computer. ADF indication, could be. VOR, maybe. Magnetic
compass? I wouldn't want a magnetic source that strong in my lap! My belt
Ken Javor wrote:
Curiosity. How long must airbags work?
As long as you have the car, supposedly. Same with seat belts.
They're all safety features. Interestingly, if you have a cracked
or broken windshield, a cop *can* write you up for the car
being unsafe. I've never heard of it,
: Thursday, January 03, 2002 12:21 PM
To: ken.ja...@emccompliance.com
Cc: cherryclo...@aol.com; m...@california.com;
emc-p...@majordomo.ieee.org
Subject: Re: EMC-related safety issues
Hi Ken:
Trial lawyers and their clients have an obvious interest in portraying
consumers as helpless
Rich Nute wrote:
EMC? Ha!
You raise a good point since the FCC legally can but
hasn't implemented an American version of immunity
standards. The words must accept on the FCC labels
of your effected devices are evident of it. Maybe some
day we will have do immunity testing.
- Doug
Re: EMC-related safety issues
I do not disagree but what about the use of mobile phones in emergencies -
should the FCC require all advertisements to carry a warning that mobile
phones cannot be relied upon for emergencies?
I think that would be a great idea as it might even focus the minds
EMI
control. No rubbish!
--
From: John Woodgate j...@jmwa.demon.co.uk
To: emc-p...@majordomo.ieee.org
Subject: Re: EMC-related safety issues
Date: Thu, Jan 3, 2002, 2:20 PM
I do not find that. In most US hotels I've stayed in, the bedroom radios
are cheapo-squared but still receive 99
]On Behalf Of James, Chris
Sent: Thursday, January 03, 2002 9:06 AM
To: 'Ken Javor'; 'acar...@uk.xyratex.com'; emc-p...@majordomo.ieee.org
Subject: RE: EMC-related safety issues
So why ain't the US government chasing the knife manufacturer of the
knives used by the terrorists rather than
-Original Message-
From: Ken Javor [mailto:ken.ja...@emccompliance.com]
Sent: Thursday, January 03, 2002 11:55 AM
To: Cortland Richmond; Andrew Carson
Cc: emc-p...@majordomo.ieee.org
Subject: Re: EMC-related safety issues
Curiosity. How long must airbags work? A car can be driven
...@majordomo.ieee.org
Subject: Re: EMC-related safety issues
I read in !emc-pstc that richwo...@tycoint.com wrote (in 846BF526A205F8
4BA2B6045BBF7E9A6ABC4FD5@flbocexu05) about 'EMC-related safety issues',
on Thu, 3 Jan 2002:
more severe immunity requirements apply. Those requirements are either
%majordomo.ieee@interlock.lexmark.com (bcc: George
Alspaugh/Lex/Lexmark)
Subject: Re: EMC-related safety issues
Hi John:
I've replaced the incandescent lamp on my bedside
table with a new energy-saving compact flourescent
lamp. With the lamp on, I cannot listen to even
To: emc-p...@majordomo.ieee.org
Subject: Re: EMC-related safety issues
*
A routine flight over Dallas-Fort Worth was disrupted when one of
the compasses suddenly shifted 10 degrees to the right. The pilot asked if
any passenger was operating an electronic device
Hi John:
I've replaced the incandescent lamp on my bedside
table with a new energy-saving compact flourescent
lamp. With the lamp on, I cannot listen to even
the strongest AM radio station on my clock radio
(on the same bedside table) due to the lamp
interference.
L4K 4L2
Tel: +1 905 760 3000 Ext. 2378
Fax +1 905 760 3020
Email: harr...@dscltd.com
-Original Message-
From: John Woodgate [mailto:j...@jmwa.demon.co.uk]
Sent: Thursday, January 03, 2002 1:59 PM
To: emc-p...@majordomo.ieee.org
Subject:Re: EMC-related safety issues
I
Hi Ken:
Trial lawyers and their clients have an obvious interest in portraying
consumers as helpless and child-like, and rich corporations as robber-barons
preying on the poor and weak. But why does the rest of society jump on that
bandwagon? Because profit and wealth, once
I read in !emc-pstc that Rich Nute ri...@sdd.hp.com wrote (in
200201031919.laa11...@epgc264.sdd.hp.com) about 'EMC-related safety
issues', on Thu, 3 Jan 2002:
I've replaced the incandescent lamp on my bedside
table with a new energy-saving compact flourescent
lamp. With the lamp on, I cannot
I read in !emc-pstc that John Shinn john.sh...@sanmina-sci.com wrote
(in 00c001c1948d$a53fb580$0b3d1...@hadco.comsanmina.com) about 'EMC-
related safety issues', on Thu, 3 Jan 2002:
NO NO NO. Don't think about the plane. There will be more red tape
than you want to think about, especially if
: EMC-related safety issues
Date: Thu, Jan 3, 2002, 1:55 PM
Today, we
simply don't have processes by which we can
test equipment for RF-induced bad experiences.
So, we argue both sides without a conclusion.
---
This message is from the IEEE EMC Society
Hi Ken:
The Forrestal incident occurred during the Vietnam conflict, July 1967. It
was pretty much as you describe except I would not say EMI was not
controlled. All DOD services had EMI requirements at his time. In fact,
1967 was the year that MIL-STD-461 was adopted as a
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