Hello Group,
Recently my purchasing department asked me to recommend standards for power
cords. These are detachable power cords for ITE equipment, both 3-wire and
2-wire.
Typically the cords are marked with one or more of CSA, UL, (Dentori T).
The ones we get are typically rated from 6 to
another UK supplier
www.colepalmer.com
has an office in Hanwell London W7
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To
low light camera+color camera and laser all through the same window
is your shielding requirement to keep stuff in or out?
what is the bandwidth of the radiation you want to control?
is the window also a gas and fluid pressure seal?
without wishing to be a 'wet-blanket' to meet this
I'll bet I could work it out, but you need to understand sever limitations
of these models. The loop model is a low frequency model. It might work at
30 MHz for a physically small radiator, but it only works when the loop size
is small relative to a wavelength. If there is a cable connected tot
I evolved this same technique for a customer who was having problems
correlating GTEM and OATS data. But I made the following extra
recommendation which I believe is absolutely essential. If the EUT has any
cables attached to it, power or otherwise, then cable common mode currents
must be
Rich,
Here is the German I have a few others but don't know which languages they
are.
ACHTUNG - Klasse 2 Laserstrahlung wenn offen. Niemals in den Laserstrahl
blicken.
Good Luck,
Josh
Josh Wiseman
EMC/Product Safety
[mailto:jwise...@printronix.com]
-Original Message-
From:
Hi! I had a question regarding meeting EMI on my board
for CISPR. I have a Fast Ethernet card and the 125MHz
Fast Ehternet fails the CISPR in the 30Mhz to 100Mhz
limit.
In the layout care has been taken to isolate the
chassis or quiet ground from Digital ground by
isolating the ground from the
We bought ours from Solar Electronics, and it was quite cheap if I recall.
Came with insertion loss curves and has worked well. Their info is
attached.
Jim Eichner, P.Eng.
Manager, Engineering Services
Xantrex Technology Inc.
Mobile Power
phone: (604) 422-2546
fax: (604) 420-1591
As always Rich provides excellent technical information .
While a different standard was originally referenced in this thread,
I'd like to consider for a moment Chris Maxwell's question
...there should be some minimum distance... on an inner layer of the
boardL
The 950-based standards have
Greetings,
Canadian EMC standard for ISM equipment is defined in ICES-001 Issue 3
1998. Similarly, the EMC standard for digital apparatus is defined in
ICES-003 Issue 3 1997. These standards are based on CISPR requirements.
Are these standards required by Industry Canada or are they
Hi Group,
I found a source which states that radiated emissions can be modeled as a small
loop antenna (i.e. less than 1/4 wavelength), where the maximum E-field
strength at 10m is proportional to the square of the frequency:-
E = 263 x 10^-12 (F^2 x A x Is) V/m
where A = loop area in sq cm,
I don't think there are mandatory noise limits for these appliances,
but directive 86/594/EEC says that if you do declare a noise value
for an appliance, you have to use the right test methods and it has
to be accurate.
Try looking for EN 60704 in the BSI on-line catalogue, and Statutory
Can someone tell me where I can find translations of the following,
especially German.
Caution - Class 2 laser radiation when open. Do not stare into beam.
Richard Woods
Sensormatic Electronics
Tyco International
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This message is from the IEEE EMC
Hi Chris:
To me, it's sort of funny in that it just says that the Creepage and
Clearance distances do not apply on inner layers of void free PCBs.
That's nice; but I can't find where a distance is specified. I mean, I
would think that there should be some minimum distance between
Tony,
Solar Electronics (Hollywood, Callifornia) sells one for about $180
(Model: 9533-1). It includes calibration data.
For calibration method, I would recommend the network analyzer method
outlined for LISNs/AMNs in ANSI C63.4 (That is if you have access to a
NA with frequency range from
1. The draft of the new Law, 2002, of the Russian Federation, to my knowledge,
does not require testing to take place on Russian soil. Further, newly
appointed President of the recenly reorganized GOSSTANDART claims that the
certification process will be streamlined (though, some concerns
Are you talking electrical (EMC) noise or Acoustic?
John Shinn
-Original Message-
From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Peter Merguerian
Sent: Wednesday, August 14, 2002 3:09 AM
To: EMC-PSTC (E-mail)
Subject: Noise Levels for
I have never had an issue using an existing CB and EMC report to acquire
GOST-R certificates. You do need to know how many copies you will need.
One copy is needed for each shipment into Russia.
I have used TUV Rhienland for this in the past.
Josh Wiseman
EMC/Product Safety
Hi Chris:
To me, it's sort of funny in that it just says that the Creepage and
Clearance distances do not apply on inner layers of void free PCBs.
That's nice; but I can't find where a distance is specified. I mean, I
would think that there should be some minimum distance between
-Original Message-
From: andrew.p.pr...@baesystems.com
[mailto:andrew.p.pr...@baesystems.com]
Sent: Wednesday, August 14, 2002 2:03 AM
To: emc-p...@majordomo.ieee.org
Subject: EMI Coatings for Windows
Can any one help?
Have been asked to find an EMC Coating that can be used on a
Group,
I have a GTEM Cell that I use for CE Emission and Immunity testing.
For my FCC testing currently I only do FCC Prescreening ( using package
software to control
and monitor the emissions in the cell )for FCC Class A, etc., then we send
the product out to a testing house in the area
I had good luck getting GOST approvals through both TUV Rheinland and TUV
Product Service, provided that I had both CB and EMC Reports for my
products. They never requested testing on Russian soil. Don't know much
about telecom approvals, though.
Leo Simon
Consulting Compliance Engineer
EMC
Andy,
Tecknit has shielding solutions for windows. I believe that they offer wire
mesh screens as well as Indium Tin Oxide (ITO) coatings. Note that ITO is
great for dissipating ESD; but I am uncertain about its utility as a radiated
emissions shield. It's surface resistivity is relatively
Sorry, my last response was incomplete:
Regarding telecom testing, it is possible that most, if not all of the
telecom testing will have to be done at COMTEST in Russia. However, just
last month, ETL SEMKO announced an agreement with COMTEST. The announcement
is vague, and states that
I am not aware of any written Russian law requiring testing to take place on
Russian soil. On the contrary, UL, DEMKO and SGS all have publicized signed
agreements with Gosstandart which (they claim) allow them to run tests on
behalf of Gosstandart. The scope of the agreements include IEC
Without looking up chapter and verse, I believe that the 61010 standards
would view internal layers as solid insulation.
Depending on the circuits in question, Dielectric testing may be required.
For solid insulation, dielectric testing would seem to be the best way to be
sure you have
Hello Group,
I am researching building a CISPR 16 compliant voltage probe as shown in
CISPR 16-1.12.2.
The Insertion loss is mentioned. I have looked into how to measure it
and everything I have found so far uses two power meters. I have one. Is
there an alternative measurement technique that I
Hi,
Many years back at another company I used a product similar to what you are
describing.
It is made by Southwall Technologies. The link is:
http://www.southwall.com/products/display/shielding.html#altair
This material is 10 to 20 Ohms/Square and they used to have other versions
that were
Peter, I don't have a clue to what levels we are exposed at home (never
measured) or what standard/s do apply, but for telecom equipment in North
America and Europe I have some references:
1. For Europe, ETS 300 753 (my version is from October 1997) uses the range
of 5-5.5 bels for close
Andy, try Instrument Plastics in Maidenhead UK. Mike Wevill +44 (0) 1628
770018.
Cheers
Alan E Hutley
EMC Compliance Journal
www.compliance-club.com
- Original Message -
From: andrew.p.pr...@baesystems.com
To: emc-p...@majordomo.ieee.org
Sent: Wednesday, August 14, 2002 10:03 AM
Dear All,
Any recommended European or North American noise levels for household
appliances such as massagers? What are the applicable standards?
Any recommended European or North American noise levels for medical
equipment, such as massagers used by professionals in a therapy center? What
are
Can any one help?
Have been asked to find an EMC Coating that can be used on a window.
Window being used for Low Light Camera, Colour Camera and 1.54micron Laser.
Coatings considered so far cause problems with attenuation of the Laser.
Companies approached so far Chomerics and Pilkingtons.
Chris,
I know I may be stating the obvious, but creepage and clearance distances do
not apply on inner layers of void free PCB's BY
DEFINITION.
If you refer to clauses 1.2.10.1 and 1.2.10.2 in IEC 60950 or 3.6.7 and 3.6.8
of IEC 61010-1, clearance is defined as distance in air
between two
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