Hi Alex:
We use a linear (basically a transformer with a PTC thermistor) class II
SELV O/P stand alone power supply rated 10Vac, 5A. One of the labs tested
the O/P Isc with a direct application of the sc. The other lab tested the
O/P Isc by applying a load of 8A. The results were
What specifications apply to Bluetooth EMC testing - not protocol testing. When
doing EMC testing, is it necessary to establish communications with the
Bluetooth device? If so, what test equipment can be used - brand, model.
Thanks,
Robert Seay
Flextronics Compliance Laboratories
762 Park
Hi Peter:
What is the percentage of color over a surface area for the insulated
green/yellow earthing conductor. Is it better to have more yellow than green
or more green than yellow. I know North Americans prefer more green than
yellow and Europeans like more yellow than green.
I read in !emc-pstc that John Barnes jrbar...@iglou.com wrote (in
3d74d7d8.3...@iglou.com) about 'SMPS EMC Emissions' on Tue, 3 Sep
2002:
I've updated the statement to meet the current international standards
for information technology equipment (ITE),
Specifically, that EN 61000-3-2 **Class
Mike et al,
See the exact wording of exempted devices, in particular item (3) as I've
copied for you below.
Amended: April 1, 2002, 15th Edition
15th Edition applied from: April 1, 2002
[...]
Article 3 (Scope of the Implementation)
These regulations shall apply to the ITE, defined in Article
The 60950 was the route I was wanting to take since I am more familiar with
that standard. I feel that I would be meeting the safety requirement of the
directive by applying that, but am also concerned with being as correct as
possible. I haven't dealt with the RTTE directive, so the information
Alex,
Are you speaking of radiation directly from a SMPS on a table? If this is
the case, why, yes, you may, ASK for margin, but you may find few vendors
willing to bid to that requirement. Few ITE makers would warrant their own
boards to meet FCC limits outside a cabinet! But a SMPS should
Rick,
I have a similar experience with PCI card cage brackets. This architecture
was never intended for today's environment.
We have used various gasketing techniques. Some OEMs now include clips on
the chassis to aid in the electrical seal with the card bracket.
A.K. Stamping has a patent on
does anyone know about:
RRL a standard/requirement
in south korea?
what equipment must comply to it?
thank you,
Richard,
-Original Message-
From: richwo...@tycoint.com [mailto:richwo...@tycoint.com]
Sent: Friday, August 30, 2002 12:14 PM
To: emc-p...@majordomo.ieee.org
Subject: RE:
Alex,
When I was developing power supplies at my previous employer, I'd
include a statement like this in our Request For Quotation (RFQ):
The power supply must meet the following limits with 6dB margin
when supplying power to an 10-ohm resistive load:
* FCC Class B (USA).
* CISPR 22-B
In North America, the earthing conductor is described as a green wire with a
yellow stripe, while in Europe it is described as a yellow wire with a green
stripe. Fortunately, there is enough tolerance in the specifications on both
sides of the pond that a single solution works in both
I notice in all of the VCCI documents, that it only refers to ITE. Any
opinions on whether or not it applies to ISM equipment that is operated
through an industrial PC? This would definitely be a Class A device.
Thanks,
Mike
---
This message is from
Tom,
As I understand it, if you are a member of JEITA then it is a requirement.
Regards,
Josh
Josh Wiseman
EMC/Product Safety
(714) 368-2737
[mailto:jwise...@printronix.com]
-Original Message-
From: T.Sato [mailto:vef00...@nifty.ne.jp]
Sent: Friday, August 30, 2002 10:06 PM
To:
CONFLICT OF INTEREST ALERT:
My employer makes SMPS.
For both conducted emissions, an unit with PFC typically makes life easier.
For reduced radiated emissions, avoid the open U chassis units. Please
note that as customers demand greater efficiencies and reduced sizes, you
will see much
---
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/
To cancel your subscription, send mail to:
majord...@ieee.org
with the single
Hello Peter,
IEC 60173: Colors of the cores of flexible cables and cords, is still active
and provides a coloring scheme for earthing conductors that is referenced in
many other IEC standards like 60204.
Regards,
+=+
|Ronald R.
Consideration for blind end users ...
Just a curiosity question which came up in a
discussion with a sightless person elsewhere ...
Q: How well do you think the safety standards
cover product use by sightless end users?
Regards, Doug McKean
Doug,
Looks like things are (just?) getting
Forum addendum
I think I need to make it clearer that my main concern was for radiated
emissions
ps
Hi Jim,
Thanks for your reply
Kind Regards
Alex McNeil
Principal Engineer
Tel: +44 (0)131 479 8375
Fax: +44 (0)131 479 8321
email: alex.mcn...@ingenicofortronic.com
-Original Message-
Alex wrote:
Do you think it is reasonable to specify in my power supply
specification
that the manufacturers SMPS should meet EN55022 Class B -6dB
Yes. I would ask for 6 dB margin since measurement uncertainty for
a typical conducted measurements system is 5.4 dB. You must also
allow for
Hi Group,
First of all thank you to those who replied to my previous email. I have not
had time to reply personally...yet.
I have noticed that the broadband noise of some SMPS are already near to the
limits of EN55022 Class B (I tested with a max resistive load). This gives
my product little
20 matches
Mail list logo
