Thanks Barry for the suggestion but I know nothing about reverberation
chambers, possibly somone could comment on the merits of RC over AC.
Ray Levasseur
EMC Compliance
Creo Products
From: b...@anritsu.com (Bailin Ma)
Reply-To: b...@anritsu.com (Bailin Ma)
To: emc-p...@ieee.org
Subject:
Charles,
This is a contentious subject for us due to the time it takes to thoroughly
test a large product, so I'd be interested in hearing other's opinions and
practices.
A scenario where ESD can cause a genuine problem (in our business) is when
someone walks across a room to add paper to a
Is it reasonable to say that internal ESD testing should be performed in
casual access areas as opposed to user maintenance areas? With PCs (for
example) being designed for user service, one would have to expect these
service persons to follow ESD maintenance procedures. Adding RAM, or
Hi Mike,
I'm not sure if they are still available, but you might still be able to
get (free) a frequency allocation chart for the US (3kHz-300GHz) in full
color from Omega Engineering. Very nice. It can be ordered on-line at:
http://www.omega.com/literature/
Just click on domestic or
Charles
Any point that is accessible during either normal operation, or regular
maintenance by an untrained person, is considered to be at risk due to an
ESD event.(i.e. if the operator is required to change a ribbon then exposed
areas should not be ESD sensitive, otherwise make it a service
Egregious? Not necessarily. For our products, we will discharge to internal
parts that the user can come into contact with during normal operation or
maintenance. For example, if the user is expected to open a cover to change an
ink cartridge, remove a paper jam, or perform some other
Nezam,
New ISO9000 (-2000 ???) standards are not yet approved. I can send
you current committee drafts, but keep in mind that those are still DRAFTS.
Mirko Matejic
The Foxboro Company
-Original Message-
From: Nezam Najafi [SMTP:nezam.naj...@madge.com]
Sent: Friday, August 13, 1999
Ask and you shall receive!.. Seek and you shall find!.. EMC-PSTC has again been
fruitful! Please Continue.
(FERRY?... WHAT'S UP WIT DAT? ... Excuse my type-o in my previous message.)
-Original Message-
From: Davis, Mike
Sent: Friday, August 13, 1999 9:33 AM
To: EMC-PSTC Regulatory
Chaz,
I think it depends on your product and how your customers will be using your
equipment (due-diligence).
To answer your question, YES, we do test internally.
You know me; I enjoy everything in excess. I have never been one that has
been satisfied testing only to the limit. If you test
Carlos,
As you are in the UK you might want to talk to your Home Authority
Trading Standards Officer. Many of them can carry out screen test level
assessments at almost no cost. They will also give advice on
interpreting areas like this for free. A word of caution, however, get
their feedback in
Thanks for responding... My question was too open.
I am aware of these facts and aware that there are
many standards from UL, NEC, OSHA etc.
Someone who seemed to believe such a edict was sent
out resently asked me to check to I asked this group.
Maybe this is just a very bad joke from someone
To All:
Dose anyone have any information concerning a draft copy of ISO9000-2000
that will supersede ISO 9001 and ISO 9002. I do appreciate any response in
advance.
Regards,
Nezam Najafi
Sr. Compliance Engineer
Madge Networks, Inc.
625 Industrial Way West
Eatontown, NJ 07724
Voice:
Omega provided me with a United States Frequency allocation chart which I
have hanging up in my open area test site lab area. The poster is
colorful, draws attention from everyone, and is informative. Try
www.omega.com, and click on free literature for more info.
--
Sincerely,
Randall T.
Hello,
Does anyone in this august group apply ESD discharges INTERNAL
to a product as required by EN55024.
I consider this just a tad egregious - don't you?
Thank you
Charles Grasso
Advisory Engineer
StorageTek
2270Sth 88th Street
Louisville CO 80027 M/S 4247.
Tel:303-673-2908
Our company manufacturers laboratory equipment so we perform safety tests and
evaluation based on EN61010-1 (Safety of Laboratory equipment). My
understanding is that we can use components, such as Power Supplies, in our
products that has been tested to EN60950 (Safety of IT Equipment) without
Ray,
Did you consider using Reverberation Chamber (RC) instead of semi-anechoic
chamber for pre-compliance?
It seems to me that RC technique has become practically applicable for both
emission and immunity tests. It's less expensive. Official EMC standards
would accept it in a couple of
Hi Mike
Regarding the Chase (now Schaffner EMC!) immunity emissions posters
(there are now one of each!) your local Schaffner EMC Test RF products
representative should have them. If you need to, you can find out their
phone etc. by visiting Schaffner's Web site at www.schaffner.com.
Regards
From what I have read in various standards (national International - and I
v'e read a few in my 17 years as a compliance engineer) these items are
generally exempt from meeting these requirements.
Obviously, as someone mentioned in an earlier message, Health Safety laws
require that the
Since this is a UK question, The Provision and Use of Work Equipment
Regulations 1992 (SI 1992 No. 29323) would seem to apply. It states
under Conformity with Community requirements 10 - (1) Every employer
shall ensure that any item of work equipment provided for use in the
premises
or
Hello Group,
I need some low frequency meters covering the ELF/VLF spectrum from 0
Hertz to 400-500kHz for both electric and magnetic fields. The meters
must be TRUE RMS responding for accurate response to varied waveforms
with both isotropic and single-axis sensors.
I need to measure in the
Carlos Perkins wrote...
Dear All,
A question from UK:
Does anyone have a strategy for handling the Low Voltage and EMC
Directive requirements relating to equipment made for use in-house?
By this, I mean test boxes, power supplies, break-out boxes, etc.
These products are not meant to be
I have an interest in knowing where to get EMI/EMC/Safety posters to hang up in
and around my office. Does anyone of you know of what posters are available and
from whom they may be ordered. I presently have two informative posters hanging
on the walls of my office as follows:
The CHASE guide
In article: 199908122132.haa09...@iswfwa.effem.co.uk
carlos.perk...@eu.effem.com writes:
A question from UK:
Does anyone have a strategy for handling the Low Voltage and EMC
Directive requirements relating to equipment made for use in-house?
By this, I mean test boxes, power supplies,
Carlos,
Over the years, I have designed and built a lot of this type of equipment.
It is actually easier to build in safety with this type of equipment rather
than a commercial product because component costs are not as much of a
factor. Here are a few rules to follow:
Identify and list all
-Original Message-
From: Steel, Howard F
Sent: Friday, August 13, 1999 8:14 AM
To: Mowbray, John H
Subject: RE: National Safety Requirements?
There are National standards - (e.g. UL 1950), but there is no national
requirement per se. It depends on the city, state,
My higher horns came from Millitech.
Leslie Bai wrote:
EMCO has no horn over 40GHz.
--- WOODS, RICHARD wo...@sensormatic.com wrote:
Try EMCO for horns and MITEQ for preamps.
--
From: Leslie Bai [SMTP:leslie_...@yahoo.com]
Sent: Thursday, August 12,
-Original Message-
From: JENKINS, JEFF [SMTP:jeff.jenk...@aei.com]
Sent: Thursday, August 12, 1999 3:09 PM
To: 'emc-p...@ieee.org'
Subject:NEMA 4 cabinet questions
Some questions about using a NEMA 4 cabinet:
(1) Is the environment inside the cabinet considered
I don't know whether the LV and EMC Directives apply to in house
manufcatured test boxes, test jigs and the like.
One thing I do know is that if I told my manager that we had to test all our
stuff and either chuck out or modify anything that didn't comply he'd string
me up
Chris Colgan
EMC
My understanding is the same as yours - you must meet the protection
requirements.
Regarding safety, I believe that to show due diligence concerning Health and
Safety regulations you would in any case have to ensure the equipment was safe
to use; the easiest way is to ensure compliance with a
Dear All,
A question from UK:
Does anyone have a strategy for handling the Low Voltage and EMC Directive
requirements relating to equipment made for use in-house?
By this, I mean test boxes, power supplies, break-out boxes, etc.
These products are not meant to be offered for sale (ie not
Bai:
Are you sure that SA + waveguide coupler is a cheaper solution for your
return loss measurement ? For a wide band of microwave frequency, you may
need a lot of different waveguide couplers, which may cost thousand bucks
themselves.
Another problem is accuracy. It's not easy to calibrate
EMCO has no horn over 40GHz.
--- WOODS, RICHARD wo...@sensormatic.com wrote:
Try EMCO for horns and MITEQ for preamps.
--
From: Leslie Bai [SMTP:leslie_...@yahoo.com]
Sent: Thursday, August 12, 1999 1:15 PM
To: 'emc-p...@majordomo.ieee.org'
I've never worked with it, but I found an MSDS at:
http://www.jtbaker.com/msds/l6697.htm
On Thu, 12 Aug 1999 22:07:14 +0300, you wrote:
I am working on a dehumidifier used as an accessory for a central
air conditioning system used on the rooftop. It employs an
electrical control box,
HI:
Is there a new National Safety Standard for the US?
A friend of mine came by and asked this. It has been
my understanding that most large cities and counties
require some type of safety approval for equipment.
I have not heard that there is an actual US safety
requirment. If there is
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