quarter 0188
squared 0178
cubed 0179
Millifarad sized capacitors are now common
and I have seen one instance of one marked mF.
With the new double layer supercaps multifarad
rated capacitors are also available and
someone is marketing a 28kF capacitor
or if you prefer 0.028MF
Nick Rouse
is about the size of the air
gap, about 1mm or less. Thus there are very strong magnetic
fields only out to a few centimetres. I don't know if this is the
reasoning behind the field values in IEC 60601-2-24 but
if it is the levels do not seem unreasonable.
Nick Rouse
.
- Original Message
and users operate in the various countries and you should
beware of the subtle differences between them.
Nick Rouse
- Original Message -
From: geor...@lexmark.com
To: Nick Rouse nickjro...@cs.com
Cc: emc emc-p...@majordomo.ieee.org
Sent: Monday, March 25, 2002 5:16 PM
Subject: Re: U.S. Safety
to equipment solt to comsumers.
Nick Rouse
- Original Message -
From: geor...@lexmark.com
To: emc-p...@ieee.org
Sent: Thursday, March 21, 2002 9:57 PM
Subject: U.S. Safety Regulations
There seems to be some confusion regarding U.S. product safety
regulations
These figures should be borne in mind the next time
you read about the dangers of the magnetic field from overhead power
lines. I have several times seen building site welders sitting on their
transformers
with their testicles dangling over the gap and I haven't seen welders
dropping like
flies.
Nick
transformers and other electrical equipment to do so in a vacuum
Although this effect can take some time to produce complete failure
it will very likely do so in the end
Nick Rouse
- Original Message -
From: Ken Javor ken.ja...@emccompliance.com
To: emc-p...@majordomo.ieee.org
Sent: Friday
Yes, I see a problem , Lightning spikes and the full peak mains
voltage when the mains is switched on at its voltage peak will
pass straight through your capacitors causing a safety hazard
and may destroy the insulation of the transformer if it is
not rated for this voltage.
Nick Rouse
one stripe pitch for every 10mph.If the pictures show you have
traversed more than 7 stripe pitches (on motorways)you will receive copies
of these photos together with a summons to appear in court.
Nick Rouse
Jim Freeman wrote:
Hi All,
I apologize for being off subject but I
can show the design meets the new
standards
Nick Rouse
- Original Message -
From: Kim Boll Jensen kimb...@post7.tele.dk
To: EMC-PSTC emc-p...@majordomo.ieee.org
Sent: Thursday, January 03, 2002 8:54 PM
Subject: Lasting of the CE marking
Hi all
I was just seeking through EMC LVD RTTE
- 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
plugs built to
of the latest version of BS1363 would most certainly have done so
Nick Rouse
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Technical Committee emc-pstc discussion list.
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Hello Gary,
Sounds like your making a case
for the wider adoption of the UK
system with fused plugs rated
to protect the power cord
Nick Rouse
- Original Message -
From: Gary McInturff gary.mcintu...@worldwidepackets.com
To: EMC-PSTC (E-mail) emc-p...@ieee.org
Sent: Wednesday, October
Certainly not in the U.K. for equipment that may
be sold to consumers. It is illegal to sell such
equipment without a plug to BS1363 already
fitted and with the correctly rated fuse in the
plug. Here and in the rest of Europe the cord
must have IEC colour coding.
Regards
Nick Rouse
A reminder to anyone who carries out ESD tests on IC's
Don't forget to throw away the tested sample. It is easy
for IC's to survive ESD tests and appear to be normal but
to have serious internal damage that will severely compromise
the reliability of the unit
Regards
Nick Rouse
- Original
Rendar were taken over a couple of years back
by Schurter. The traded for a while as Rendar - Schurter
but have now dropped the Rendar part of the name
and are just Schurter UK Ltd. They are still operating
from the same factory in Bognor and still making the
same products such as IEC320 plugs
they are .
Nick Rouse
- Original Message -
From: brian_ku...@leco.com
Subject: In-line Fuses
We have an application where an In-Line Fuse would be an easy fit to a
problem. The fuse and holder would be added to an existing internal cable
harness in a
piece of Lab Equipment (EN61010-1 for safety
Peter Tarver wrote in reply to my comment
The rating of a UL rated fuse is more or less
the current at which it blows. The rating of a fuse to IEC
127 (used throughout Europe) is more or less the working
current of the fuse and the circuit it protects
This may or may not be true. Last I
current of the fuse
and the circuit it protects. Thus circuits are used right up to the
full rating of fuse protecting them
Nick Rouse
- Original Message -
From: Lesmeister, Glenn glenn.lesmeis...@compaq.com
Subject: Products Electrical Ratings De-rated for Eurpoean Branch Circuits
modified but if
the directive stands its wording is fairly unambiguous.
Regards
Nick Rouse
Original Message -
From: Nick Williams nick.willi...@conformance.co.uk
To: Dan Teninty dteni...@dtec-associates.com
Cc: Emc-Pstc@Majordomo. Ieee. Org emc-p...@majordomo.ieee.org
Sent: Sunday
are correspondingly higher as those
generated on the high voltage transmission
lines are transformed down by a lower ratio
Nick Rouse
- Original Message -
From: geor...@lexmark.com
To: gelf...@memotec.com
Cc: emc-p...@majordomo.ieee.org
Sent: Friday, February 02, 2001 7:30 PM
Subject: Re: 230 Vac
clause. If the equipment is switched on by the customer or your sales rep it
must be
electrically safe and be CE marked for the Low voltage directive
Regards
Nick Rouse
- Original Message -
From: O'Shaughnessy, Paul paul_oshaughne...@affymetrix.com
To: 'Lou Guerin' lgue...@littlefeet
complicated way.
I know this does not count as anything like simple but
simple sounding questions often have complicated answers
as Benoit Mandelbrot found when he asked 'how long is
the coast of Britain?' I hope you can distil some simple if
simplified answers that will satisfy your class.
Nick
.
Nick Rouse
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you may use only the new amended version.
Nick Rouse
- Original Message -
From: Friedemann Adt a...@viewsonic.com
To: h...@jyske-emc.com; emc-p...@majordomo.ieee.org
Sent: Friday, October 06, 2000 6:56 PM
Subject: Re: EN 61000-3-2/A14
I tried to refresh my memory about quoted
From: Nick Rouse 100626.3...@compuserve.com
To: wo...@sensormatic.com
Sent: Saturday, October 07, 2000 7:44 PM
Subject: Re: Overcurrent Protection: One or Both Sides?
Hello Richard
No, there is only one fuse in the standard BS1363 mains plug .
It is in the live side and the plug
I don't know any French but if it is the French implimentation of the
Machinery directive it would not cotain any EN numbers. The
Machinery directive is a New Approach directive and they never
specify particular standards. It specifies routes to compliance that refer
to harmonised standards.
think you could make such a case I suggest your
talents would be much more profitably employed in the law
than in being a compliance engineer.
Nick Rouse
- Original Message -
From: tinb...@aol.com
To: cdup...@cs.com; fr...@amcomm.com
Cc: emc-p...@ieee.org
Sent: Monday, October 02, 2000 6:24
- Original Message -
From: Nick Rouse 100626.3...@compuserve.com
To: FRIES fr...@amcomm.com
Sent: Saturday, September 30, 2000 9:49 PM
Subject: Re: Getting Started
- Original Message -
From: FRIES fr...@amcomm.com
To: emc-p...@ieee.org
Sent: Friday, September 29, 2000 3:35
to tell them
apart. Get them the wrong way around and in one case you
get a brilliant light that dies in about 100 hours and in the other
a light that lasts almost for ever but is ridiculously dim
and inefficient.
Vive! European Unity
Nick Rouse
- Original Message -
From: raymond
if you go in at
baseband video via the SCART socket found on most sets, they will not
lock up the NTSC derived baseband video as monitors used to do in
monochrome days. I used to work designing telvision equipment such as
standards converters and it is no small problem.
Nick Rouse
- Original
and
certification under the Approval of Electrical
Appliances Scheme.
They are also bringing in a framework for
EMC regulation and emissions standards
for ITE will be the first stage. Again the
standards, although local are based on
international ones
Nick Rouse
intend
to issue an updated version of their own guidelines
in the next couple of months in response to the
Commission guidelines and it will be interesting
to see whether they fall in line with the Commission
in this matter.
Nick Rouse
the scope of the
old version. There was some expectation that this
principal would apply more broadly but if EN55103-2 -3
are eventually published with a dow of 1 Mar 1997 and
listed in the OJ obviously this is not so.
Nick Rouse
Two relatively common uses of radioactive materials in electronics
are tritium powered luminous bars 'Betalights' and some very fast
gas discharge tube type surge arrestors. The common slower
telephone grade ones have no radioactive materials.
Nick Rouse
I believe the reference is to the ICE 309 series of plugs and sockets. IEC 309
is equivalent
to CEE 17 and is listed in the OJ with relevance to the low voltage directive
Nick Rouse
this definion.
Nick Rouse
Nick Rouse
but the conclusion he came to
agreed with the
interpretation of phrase 'designed for use with a voltage rating of ...' given
by Nick Winter
at the DTI. They regard the directive as applying only to equipment powered by
voltages
within the stated limits
Nick Rouse
you can suppress harmonics. The limit is the practicality of
the use
of such filters. You tend to need values of several henries capable of taking
the DC current
which may be 10's of amps without saturating. Such inductors are large.
Nick Rouse
.
A point in that standard that some may not have noticed is a that there is a
complete ban on the use of half wave rectification.
Nick Rouse
amendment A12 in the OJ.
Nick Rouse
will come into force immediately
on listing in the OJ
Nick Rouse
is that
with some directives this is required but for the LVD,
EMC and Machinery directives, if type examinationl
is not require, a manufacturer can declare compliance
based on his own or any others measurements without
any quality system being mandatory.
Nick Rouse
) as the basis for this declaration but the
must take all reasonable steps to ensure this is valid. They cannot
just pass on your assurance, unchecked and evade responsibility.
Nick Rouse
standards but leaves unclear some
matters where the scope of a standard changes.
4.Non-question, see above
Nick Rouse
The requirement for the last two digits of
the year in which the CE marking was
affixed on the DoC is the 6th indent of
Article13 (6)B of the CE marking directive
93/68/EEC. Note that year numbers are
not called up for the marking itself.
Nick Rouse
will be a 120MHz
Pentium. Soon we can expect this difference
to apply to most PC based products.
Nick Rouse
and then a further filter to reduce the clamp level to
below the signal threshold. This can be expensive
and bulky if you have a lot of signals but it can be done.
Nick Rouse
as a result of action by a Trading Standards Officer.
I hope this rather lengthy reply finally kills this rumour
Nick Rouse
with connectors for optional attachments.
A PC manufacturer does not expect that every
computer sold will used only with a device on
every serial and parallel port. The test is intended
to simulate a real risk. Where to apply the test
should surely be governed by where this risk is
real.
Nick Rouse
to a coupling plane 100mm from a connector
face can have more effect than a direct discharge
to the pin.
Nick Rouse
standards is not absolutely
mandatory for compliance with the LVD. The catch is
that if you do not fully conform, then from next year you
will need detailed documentation in advance of
marketing showing how you achieve equivalent safety
to that given by the harmonised standards.
Nick Rouse
safety directive on the
declaration of conformity which is a formally defined
document relating to those directives that require it.
Like superfluous CE marks I think that superfluous
delcarations of conformity should be discouraged.
Nick Rouse
92/59/EEC published in the Official Jounal ref:
OJ L228 of 11-Aug-1992 and came into force
on 29-Jun-1994 and was carried into UK Law
by The General Product Safety Regulations 1994
Statutory Instrument 1994 No.2328 which came into
force 3-Oct-1994
Nick Rouse
in which you don't need to.
I suspect the UK authorities will turn a blind eye to
to a technical breach of this standard during this time
provided the vote is positive but I not so sure the
German authorities will.
Nick Rouse
with every
item may avoid administative delays if the
authorities were to question compliance.
Nick Rouse
need them
Nick Rouse
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