Courtland,
I saw many quick responses to your question that may be missing the essence
of your question.
Actually, the answer which you seek depends on what you mean by CE
To CE mark most electronic products, meeting the radiated immunity
requirements IS required. A Declaration of
I think that you can draw the line at the scope of the standard.
Does your product fall under the scope of EN 61000-3-2/3 ? If it does, then
the standard does apply. This means you had to actually look at the
documents in order to find current/voltage levels ... in order to determine
what
All,
Happy New Year!
One of our European sales reps is asking about a standard which he calls
ETSI N3. I'm drawing a complete blank with this one and N3 brings up
nothing on ETSI's homepage.
Anybody got any ideas about this one?
As always, the help of the group is greatly appreciated.
Chris
Muriel,
Coupling/Decoupling networks (of which LISN's are a subgroup) can affect DUT
performance. I myself have not experienced this with a conducted emissions
LISN, but I have experienced it with an EFT generator.
We made a product that had an internal thermal printer. We EFT test in
house.
Let's look at this from the point of view of a customs officer.
Would I trust a box just because it has a CE mark on it? If I were a
customs officer and I trusted every box that came through with a CE mark on
it, I would be inviting smuggling. People could be smugglling God knows
what into my
Yes, there is a reason.
There is a Toy Directive which (I'm on unfamiliar ground here) deals
mostly with child safety. As such, some really passive hunks of plastic
(i.e. Barbie Dolls (and Ken Dolls, for gender equality) come with CE
marks on them. When it comes to children, any piece of
Let me first say that I think people are missing the thrust of William's
initial question. The ensuing debate has taken a life of its own. (I can't
resist a debate, so I'll weigh in after looking at William's question).
William is wondering why EN 55024 (an ITE standard) only has immunity limits
Muriel,
The Quasi-Peak and Average detectors are specified in CISPR 16. (EN 55016)
I don't have a copy, so I can't provide you with cold hard mathematical
details of what resistance, capacitance, ... is used. But I can tell you
how and why they are used.
The Quasi-Peak and Average detectors
Brian,
I really liked Nick Rouse's explanation for completeness. I'd like to
extract maybe a simplification of the self inducing part.
It was explained to me that E-M fields are sourced from charges that
accelerate. When charges are stationary or when they are moving with
constant velocity,
John,
We have bounced this subject around ad nauseam (to the point of sickness
for those not into latin).
As I understand it, the long and short of it is:
The writers of EN 61326-1 separated equipment into two classes. Class A and
Class B. They intended to exclude Class A equipment from
All,
I was asked by one of my colleagues here if there are any compliance
requirements for passive fiber optic components such as: patchcords,
connector adapters ...
My quick answer was no; however, the cautious side of me says that there
may be some EN standard governing these types of
Maybe the only thing in need of calibration here is our collective
conscience and our speedometers.
I thought the purpose of laws, radar guns, speeding tickets ... was for the
public good, not so that we could invent the most clever way to avoid
getting caught. It may be an interesting
All,
There is no such thing as the Bovine/Equine Equipotential Directive.
However, all this talk about Stray Voltage is very much on the minds of
farmers. I replied to Gert offline on this subject because I thought nobody
else had any interest. But the list of serious and not-so-serious
My company doesn't have any USB products (yet), so I'm just an innocent
bystander. But sometimes a bystander can provide a mediating point of
view. (or maybe stir things up a little)
What if I were to play devil's advocate? What if we assume that the RTTE
directive did apply? What if we also
Do they have the same modulation parameters? I always assumed that the
800-960Mhz tests were pulse modulation tests using 200Hz, 50% duty cycle
square waves. If not, then I'm just as confused as you are.
-Original Message-
From: Barry Ma [SMTP:barry...@altavista.com]
Sent:
24, 2000 6:06 PM
To: 'Maxwell, Chris'; emc-p...@majordomo.ieee.org
Subject: RE: Got another beef about an NRTL
Importance: High
Chris,
The NRTL mark is not for your pleasure and convenience. It is for
consumers who don't want their Christmas lights to light up their whole
This argument highlights why I like the self-declaration route to
conformance.
If I was NRTL A, I would be VERY cautious about accepting data from NRTL B
for a product that will be sold with my (NRTL A) mark on it.
I beleive that the system is much more practical when self declaration is
Guys,
A couple of years ago, we designed a cigarette lighter adapter for one of
our products. At the time, I looked into the Automotive EMC Directive
95/54/EC. I found the following references. Surf at your own risk, I'm not
sure if these websites and html's are still out there!
/led_lamps/app_index.html
See y'all later,
Chris
-Original Message-
From: Joe Finlayson [SMTP:jfinlay...@telica.com]
Sent: Wednesday, October 18, 2000 3:20 PM
To: 'Maxwell, Chris'
Subject: RE: Laser Safety-Thanks
Hi Chris,
Any chance of forwarding this app note
All,
Thank you to all who have responded to my inquiry regarding laser safety
calculations. I want to publicly stress my appreciation to the guys at
Agilent who went the extra mile to forward an app note.
I really appreciate that because our company and Agilent make some products
that
.
-Original Message-
From: eric.lif...@ni.com [mailto:eric.lif...@ni.com]
Sent: Wednesday, October 04, 2000 11:49 AM
To: CE-test - Gert Gremmen Ing. - CE-mark more ...
Cc: Maxwell, Chris; 'Jim Eichner'; 'EMC-PSTC - forum'
Subject: RE: Standards hierarchy
Gert et al
Point well taken. You're right, safety is relative.
I think that your message (below) points to the fact that products that are
double line fused should have labeling to say that they are double line
fused (as the clause in EN 60950 that you mention points out) It also
points to the fact that
Kathy,
IEC 825-1 has been published as EN 60825-1. EN 60825-1 covers lasers and
LED's. An LED and a laser are two different devices,
so I don't think that I can tell you the circumstances under which an LED
becomes a laser. Theoretically, this would only happen if the piece of
semiconductor
Guys,
One of the recent Conformity updates had an article on these standards.
Follow the link below:
http://www.conformity-update.com/iec-61000-000908.htm
Just another piece to add.
Thanks,
Chris Maxwell, Design Engineer
GN Nettest Optical Division
6 Rhoads Drive, Building 4
Utica, NY
for $5/hr doesn't sound so bad.
-Original Message-
From: eric.lif...@ni.com [mailto:eric.lif...@ni.com]
Sent: Wednesday, October 04, 2000 11:49 AM
To: CE-test - Gert Gremmen Ing. - CE-mark more ...
Cc: Maxwell, Chris; 'Jim Eichner'; 'EMC-PSTC - forum'
Subject: RE: Standards hierarchy
Jim,
Yes, I'm sure that there was a collective groan when you mentioned EN
61000-3-2 and EN 61000-3-3 in your email. I wasn't part of it. I'm glad to
see that someone else is still questioning what's going on with this
standard.
I think that your understanding of Basic Standards, Product
Guys, (ladies too)
We have a customer specification in spanish which refers to CEI 255-4 and
CEI 255-5. I am assuming that these are IEC specifications.
As a matter of fact, the text reads (forgive my Spanish spelling)
CONDICIONES ELECTROMAGNETICAS (I think I can figure this line out :-)
All,
We have inherited a design from a company which we purchased. The product
is a handheld and can be operated from a pair of Alkaline batteries. Inside
the unit, there is a 91 KOhm resistor across the + and - terminals of the
batteries. Since the people who designed the instrument are long
Wait a minute!
Buying a board scanning system to evaluate different vendors for ferrites
and oscillators? My company doesn't have that kind of money to throw
around. These systems can cost 10's of thousands of dollars. Ferrite
beads cost about a dime for a dump truck load. If it costs
All,
We have been using a Comtest G310 0.7m x 0.7m x 0.7m Stripline cell for a
few years now. For those unfamiliar with a stripline cell, it is a cubic
chamber with a type-N coax connection on each side. The coax center
conductor is routed through the bottom of the chamber under a false floor.
I wanted to throw in an emissions trouble shooting technique that I saw Jon
Curtis do one time when I was at his lab. I'd like to call it the Jon
Curtis Wet Finger Test
We had a signal failing at 200Mhz. We had narrowed the problem down to
either the GPIB cable or the GPIB interface
Hi all,
I'm designing a new telephone reset circuit for one of our products. This
time around, I'm trying to meet the telcom requirements of UL 1459, UL 1950,
GR1089-CORE and FCC Part 68 as well as the EMC requirements of EN 61326-1.
I have gone through a document provided by Teccor which
Group,
I am currently surge testing a handheld product with a Class II (ungrounded)
wall-wart power supply. I have surge tested many class I (grounded)
products here (in-house) before. This is my first Class II product.
Most standards, including EN 61326-1, specify different Surge voltages
: 315-797-4449
FAX: 315-797-8024
EMAIL: chr...@gnlp.com
-Original Message-
From: Laura Leyba-Newton [SMTP:lnew...@hach.com]
Sent: Thursday, June 01, 2000 6:01 PM
To: 'Maxwell, Chris'; 'EMC-PSTC Internet Forum'
Subject: RE: AS/NZS 4251.1.1.1999
I found what I am quit
Utica, NY 13502
PH: 315-797-4449
FAX: 315-797-8024
EMAIL: chr...@gnlp.com
-Original Message-
From: Kazimier Gawrzyjal [SMTP:k...@nortelnetworks.com]
Sent: Thursday, June 01, 2000 2:55 PM
To: 'Maxwell, Chris'
Subject: RE: AS/NZS 4251.1.1.1999
Hi Chris,
Can you tell
Laura,
I have found three websites to be useful.
www.sma.gov.au
www.aca.gov.au
www.austel.gov.au
In particular, the SMA (Australian Spectrum Management Agency) website used
to have a Handbook For Suppliers which you can download. I downloaded a
copy of this which has proven to be extremely
Joe,
I feel for you. The global company makes a compliance engineer's job more
difficult than ever. I get uneasy when the design and or production control
gets out of eyesight.
However, we have managed to put a small dent in the Global ECO process.
We have recently made a rule that dictates
Group,
Is there an in-line adapter that we can install on a TNV line (in our case,
a typical RJ12 phone line) to our product that will provide a second layer
of hi-pot protection? The whole explanation follows for those who think
they can help. Others can press delete right now and get on with
Barry,
You're hitting upon one of the basic fundamentals of how radiated emissions
occur.
The situation that Andrew is describing occurs if we design our boards
properly, with a low inductance return path for each current and with proper
impedance matching; then our traces will act more like
Allen,
Try,
STEWARD, Glen Rock PA, Phone 717-235-7512, Fax 717-235-7954
CORCOM, Libertyville IL, Phone 708-680-7400
AMPHENOL, (sorry, I don't have a phone number available)
MAXCONN, San Jose (do you know the way?) CA, Phone 408-435-5050 Fax:
408-435-8377
We use an Amphenol FRJ-468 which is
.
Utica, NY 13502
PH: 315-797-4449
FAX: 315-797-8024
EMAIL: chr...@gnlp.com
-Original Message-
From: Dan Kinney (A) [SMTP:dan.kin...@heapg.com]
Sent: Tuesday, May 16, 2000 11:17 AM
To: Maxwell, Chris; emc-p...@ieee.org
Subject: RE: OJ mystery
Chirs,
Everything you said
William,
I beleive that EN 50081-2 and EN50082-2 were among the original standards
for CE marking. When enforcement of the EMC Directive went in place on 1
January 1996, these standards were already in place. As such, it isn't any
suprise to me that they don't supercede any other standards.
Hi all,
I've been watching the thread regarding the re-naming of UL 1950 to UL60950.
I applaude the efforts of UL to give us one less number to remember. Most
people are already overloaded with voice #, fax #, ATM PIN #, cell phone #,
voice mail#, credit card #, social security #. Then, as
Hi all,
If you remember,
A while back, there was a thread in which I was involved regarding the
application of EN 61000-3-2 (Harmonics) and EN 61000-3-3 (Flicker) to
equipment covered by EN 61326-1 (test and measurement equipment). I have
kept all of the emails in a folder and have tallied
George,
Check out the websites www.sma.gov.au and www.aca.gov.au. From these sites
you can download a Handbook for Suppliers which should give you a start.
I didn't need a specific name or phone number to contact, however, you may
be able to find one on these sites.
Happy hunting.
Chris
standards 3-2 and 3-3 are
only applicable to ITE?
Thanks.
Barry Ma
b...@anritsu.com
--
On Tue, 28 March 2000, Maxwell, Chris wrote:
.
My understanding of the scope of EN 61000-3-2 and EN 61000-3-3
is that it is targeting Information Technology Equipment (ITE).
Much
I'd like to present a dissenting opinion on this one.
I feel that, as the standard is written now, Class A test and measurement
equipment complying to EN 61326-1 is exempt from the harmonics and flicker
standards of EN 61000-3-2 and EN 61000-3-3.
I don't feel as if it was overlooked by EN
Does CE + CE = CE?
My simple interpretation of this is that the boundary for modularity ends at
the enclosure that the customer sees.
A short and sweet example based upon one of our designs is: We make a unit
incorporating a CE marked open frame power supply. We use a CE marked
processor
After reading John's reply to The wisdom behind all these standards, I
then read a colleague's question regarding UL 544 and leakage current. He
mentioned a 50uA leakage current limit for cardiac tissue. I want to use
this as an example of the wisdom behind all these standards.
At some point
immediately.
Rene Charton
Kevin Newland kevin_newl...@yahoo.com on 03/16/2000 06:59:11 AM
Please respond to Kevin Newland kevin_newl...@yahoo.com
To: Maxwell, Chris chr...@gnlp.com, 'EMC-PSTC Internet Forum'
emc-p...@majordomo.ieee.org
cc:(bcc: Rene Charton/TUV-Twn)
Subject
Jim,
I had this same problem when I worked for the Air Force. We needed to
transport a number of devices containing Lithium batteries. At that time,
my best resource for information was the battery manufacturer. Since
batteries are their livlihood, they make it a point to understand the
Our sales people in Russia have started the process of Certifying our
equipment to sell in Russia. The two agencies that they are working with
are Gosstandart and the Ministry of Communication.
According to them, the certification will consist of an inspection of all of
our existing
Actually, my subject should have said RE: EMC and product safety split.
When this started, I vowed that I would not get involved. I also vowed that
I wouldn't eat any of the cake on the table by the engineering lab. Now
both vows are broken. After I recovered from the sugar high from the
Rick,
We manufacture light sources that are used to inject a known amount of
light into a fiber optic cable under test. Our high cost models use lasers
and our low cost models use LED's. When it comes to these light sources, we
do indeed consider EN 60825-1 for both the laser and LED models.
Derek,
With regard to the 3m cable limit. We also test to EN61326-1. In my eyes,
the spirit of the standard is such that we can only take the exemption if
the cable in question can be specified to a customer as less than 3m without
restricting thier usage of your product. I have used this
Hi all,
I don't know if this is customary. If it isn't, then I'll start the custom
myself. This is simply a message to introduce myself and the standards that
I'm familiar with.
My name is Chris Maxwell, I work for GN Nettest in Utica, New York, USA. We
are a manufacturer of equipment for
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