Tony,
The straightforward answer to your question is that RTI is a concept
developed by UL and is not referred to in the EN standards. The
theory is that the EN standards require plastics performance to be
assessed at a temperature sufficiently in excess of the temperature
at which they are
Check part 15.33 for the complete answer and upper frequency measurement
range.
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To
Bob,
I can't speak for the FCC requirement, but it's not a foregone
conclusion that marine equipment is exempt from the EMC Directive.
This is another one of those complex ones where CE marking and other
international agreements intermingle and I can't give you much more
help with only the
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
Kris,
The FCC will accept test data showing compliance with CISPR 22 as long as
the test methodology of ANSI C63.4 has been followed and any required testing
above 1 GHz has been performed. I believe that there should be some European
test houses listed as capable of performing the tests
Plastic become very flexible above 60-120 deg C - long before they become
molten.
950 requires testing to ensure no hazard at at temperature of 40 deg K ABOVE
the maximum operating temperature.
Hence a component achieving 75 deg C at ?35? deg C Ambient with an equipment
operating temperature of
I read in !emc-pstc that Leslie Bai leslie_...@yahoo.com wrote (in
20011002170853.30484.qm...@web10904.mail.yahoo.com) about 'Marine
Equipment', on Tue, 2 Oct 2001:
Hormonized
Really? What physiological effect do(es) the hormone(s) have?
--
Regards, John Woodgate, OOO - Own Opinions Only.
I read in !emc-pstc that Hougaard, Niels niels.houga...@barconet.com
wrote (in 696BDC661BFCD411A8C90002A5094896176263@bndkcopmex01.barconet.
com) about 'Class A ITE', on Tue, 2 Oct 2001:
As my company's products (units for compressing/decompressing of TV and
broadcast signals) mainly are used on
Good question. Re-phrased: Is a PC always a PC?
According to 15.101(a) provides a table listing the authorization procedures.
The specific term, and I quote, is Class B personal computer and is subject
to DoC. According to the FCC, 15.3(s) defines a PC as an electronic computer
that is
forwarded for Steve Williams.
Original Message
Subject: Re: RTI on Plastics
List-Post: emc-pstc@listserv.ieee.org
Date: Tue, 2 Oct 2001 10:56:00 -0400
From: steve.willi...@apcc.com
To: tony.reyno...@pb.com
CC: emc-p...@ieee.org, owner-emc-p...@majordomo.ieee.org
Tony, some
In the EU is it legal to ship a product with an attached power cord with
pig tail leads and have the appropriate power plug attached by the
installer according to the installation instructions?
Richard Woods
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This message is from the IEEE EMC Society
Tony -
The UL746 series of standards are referenced in CSA/UL60950,
Annex P.2. RTI is a material property evaluated in UL746B,
Polymeric Materials - Long Term Property Evaluations. IIRC,
guidance on the applicability of RTI is given in UL746C,
Polymeric Materials - Use in Electrical Equipment
For CE, as a start, you need to look at both the Marine Equipment Directive
and the Recreational Craft Directive. I would apply these as additions to
the EMCD and LVD, not as substitutes for.
Regards,
Jim Eichner, P.Eng.
Manager, Engineering Services
Xantrex Technology Inc.
Mobile Power
Hormonized EMC standards for maritime equipment are:
EN 300 828 for maritime mobile services and
EN 300 829 for maritime earth stations.
Leslie
--- noisel...@aol.com wrote:
Hi Bob:
In general, your statement:
It is my understanding that marine equipment is
exempt from the EMC
Hi All,
It seems we spend quite a bit of time tracking down glitches on logic
signals. Once a glitch has been found that appears to be causing a
system to hang-up, reset, or otherwise not perform as
expected..Now what?
All may not be as it appears and if not, a great deal of engineering
It is my understanding that marine equipment is exempt from the EMC
Directive and from FCC regulations.
Can anyone tell me what standards would cover a battery operated lighting
system running at 100 VAC,
1500 Hz for both Europe and the U.S.?
Thanks,
Bob Heller
3M Product Safety, 76-1-01
St.
EMC LAB LOOKING FOR AN EMC ENGINEER THE IDEAL CANDIDATE SHOULD HAVE 3 YRS
OF EXPERIENCE IN RF, EMC TESTING. MUST BE CUSTOMER FRIENDLY AND A TEAM
PLAYER. MUST BE WELL ORGANIZED ABLE TO WORK INDEPENDENTLY. WE OFFER A
COMPETITIVE SALARY BENEFITS PACKAGE. PLS SND RESUME TO i...@timcoengr.com
All,
I am having some fun with a lab over RTI ratings on plastics. Basically we
have a plastic moulding with a component mounted directly on it. The RTI
of the plastic is 60C and the component is getting to around 75C actual. I
have always looked at the flammability of plastics 5V, V-0, V-1,
I would think speed of the energy source
would be a critical factor.
Does anyone have the information
on Surge vs. ESD discharge for
speed of pulse and duration.
Richard,
-Original Message-
From: Chris Chileshe [mailto:chris.chile...@ultronics.co.uk]
Sent: Tuesday, October 02, 2001 6:55
Ravinder,
I can attest to the 2kV ESD immunity of ICs because I have done
such tests myself. I am now in the process of trying to raise the
ESD immunity level to 4kV on one particular pin.
Have you - or anyone else on this group - had any experience working
with small surface mount
Hello group,
A data acquisition board for building into a PC has been tested to the European
standard EN 55022, class B by an accredited testlab in Europe.
This configuration is not meant for a residential market and I suppose FCC part
15 is applicable.
Which procedure should be followed
Hi,
it is a question if you freely can choose between Class A and B if you have
a product intended for use in purely domestic environment.
As my company's products (units for compressing/decompressing of TV and
broadcast signals) mainly are used on broadcast sites it can be discussed if
the
I agree that the seams and apertures cut into a case are the main avenue
for radiated emission to penetrate or escape from a shielded case.
However, a plated plastic casing e.g. Ni with a thickness of 20 um would be
many skin-depths (delta's) in the 100 MHz and above zone, so the SEE (
shielding
Aschenberg, Mat wrote:
Are there standards for testing of components on a pwb?
There is some concern here that we should be testing
individual components on the pwb.
Thanks for your help.
Mat Aschenberg
Mat,
The only thing I can find that's anywhere near to what
you're asking is
message emc test
Andre
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message telecom
Andre
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Hi all,
if anyone knows manufacturer who makes
those test equipment for mains voltage induction,
upto 1500 Volts I would be glad to hear about it.
regards,
Ari Honkala
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