Dear all,
we have been advised by our CB ( and acredidation requires you ) to update key
documents when changes occur: I read the D of C to be such a document.
Derek Walton
John Allen wrote:
Hi Folks
I disagree strongly with Scott's assessment that the DoC has to be resigned
for several
Hi, Hans,
Are you thinking of Four Phase ??
Weren't they a competitor to Tandem Computers?
Don't know who did the first hot swap disk drives. Patent search tell
you? Remember at one time it was really important to be able to pull out a
hard drive and secure it away in a safe someplace. Boy,
Richard,
The Machinery Directive is applicable and would definitely be concerned
with the control electronics from a number of points of view. The
interesting issue with these types of products are the Human Nature
hazards. Will a child hold on to the gate as it opens in order to ride
it and if so
Hello all,
I am looking for line filters to put in my lab for circuits going to
test benches, two circuits: 120vac, 20A 240vac, 20A, for each bench,
5 in total, 10 circuits . Here's a brief description of my lab it's on
the fourth floor, we are expanding our
I suspect, but don't know, that such a device may be covered by a different
directive concerned with railway issues.
I suspect this because I notice exceptions in a few directives for railway
carriages.
If there is not a directive for railway line equipment then I think the
Machinery
Sandy, I believe that the performance criteria applies for all voltages
on
all of the immunity testing. When I used to work at KTL Dallas (the old
ICC), that is how we applied the criteria. I have not seen anything in the
generic immunity standards to indicate otherwise. The
John,
Good that you disagree, wouldn't want everybody just following along.
I said the DofC should be re-signed for the following reasons:
If the original signatory is no longer employed by the manufacturer, then
fine. All of the product shipped prior to the departure of the signatory is
okay
I assume you mean rf absorption. I have never done this test, but this is
how I would do it. In principle, you connect a four-port directional
coupler (dc) to the output of a signal source, and an appropriate antenna to
the dc. Boresight the antenna at a right angle to a bare metal wall.
Interesting question,
I have always gone under the assumption that the requirement would be the
same
for all levels tested up to the maximum voltage. I of course have no hard
proof
that this is the actual requirement.
Regards,
Jeff Bailey
EMC Technologist
SST - A Division of Woodhead
We have a new engineer learning Part 68/IC CS-03 that we would like to
enroll in a seminar or training course. Is anyone aware of any seminars or
training courses for Part 68/IC CS-03.
Best Regards,
Jody Leber
jle...@ustech-lab.com
http://www.ustech-lab.com
U. S. Technologies
3505 Francis
To all,
With regard to FCC Part 15 Subpart B and Subpart C.
An intentional radiator it is certfied to Subpart C which
essentially calls for Class B emission performance.If the radio is approved
as a module and then inserted into another product and that same product is
I guess a good corollary would be the US currency. When we have a new
Secretary of the Treasury, we do not recall all of the old bills.
Whenever a shipment of product needs to be made (after the departure of the
old signatory), a DOC with the new signature is produced.
Scott Barrows
KTL -
Does anyone recall when the first hot-swap disk drive
was used? I recall something in the early 80's for
govt and industry by some company named phase-four? or
something like that.
=
Best Regards
Hans Mellberg
EMC Consultant
__
Do You
For those of you that missed the presentation by Dr.
Richard Wheeler and/or requested copies of his
presentation on Simultaneous Switching Noise in the
z-direction.. can view the paper on his website:
www.wheeler.com
=
Best Regards
Hans Mellberg
EMC Consultant
Is the machinery directive applicable for the such a gate
and it's control electronics? Appreciate any comments.
Rich Lanzillotto
rl...@concentric.net
To All,
With specifics to EN 55024 Information Technology Equipment-Immunity
Characteristics-Limits and Measurements and the EN 61000-4-2 ESD requirement.
ESD requirement of +/-8 Kv Air Search and +/- 4 KV Contact/Indirect is usually
tested gradually for example +/- 2KV, +/- 4 KV and
Hi Folks
I disagree strongly with Scott's assessment that the DoC has to be resigned
for several very important and pragmatic reasons:
a) To-date I have yet to see any official EU or other substantive document
to support his viewpoint.
b) People are always coming and going - it is a fact of
Re:How to measure the absorption characteristics of the carbon-impregnated
foam pyramids?
This is a very difficult measurement to make! Dr. Robert Johnk at NIST
(National Institute of Science and Technology) in Boulder, Colorado has
recently developed a new method of doing this. He can be
We have a new engineer learning Part 68/IC CS-03 that we would like to
enroll in a seminar or training course. Is anyone aware of any seminars or
training courses for Part 68/IC CS-03.
Best Regards,
Jody Leber
jle...@ustech-lab.com
http://www.ustech-lab.com
U. S. Technologies
3505 Francis
Actually in the original posting the line wrap put the remaining
characters on the next line so they didn't get included in the 'link'.
If you click as before and then when you get the 404 add 't.html' to the
end of your 'location' window and hit return it works just fine.
In simple terms the
Hello pstc-ers,
The Northeast Product Safety Society Inc's 5th Annual Vendors' Night is
SOLD OUT. YES, we've sold all 48 tables (in addition to the NPSS and IEEE
EMC Society tables). It's going to be the electrical product safety
compliance industry's best show in the country; there's plenty of
Jess,
Most of my reference sources show the US as 120VAC +/-5% 60Hz +/-0.3% and
Argentina as 220VAC +/-10% 50Hz +/-2%. The 1996 World Electricity Supplies
shows:
* Charlotte, North Carolina as 120VAC +5-2.5% 60Hz +/-0.06%.
* Detroit, Michigan as 120VAC +4-6.6% 60Hz +/-0.2%.
* Los Angeles,
Tony,
Very good question. The person that signs the DOC is doing so as a
representative of the company he/she works for. If he/she ends their
employment the replacement person does not have to re-issue the DOCs. It is
the company that is making the declaration, not the individual. The
The DoC must be re-signed.
Scott
s_doug...@ecrm.com
ECRM Incorporated
Tewksbury, MA USA
-Original Message-
From: reyno...@pb.com [mailto:reyno...@pb.com]
Sent: Thursday, November 11, 1999 10:16 AM
To: emc-p...@ieee.org
Subject: D of C - Who Signs?
Importance: Low
Hello!
BSI World Electricity Supplies quotes +/-10% for overhead cable and
+/-7% for underground cables for 220V in Argentina.
For the US, there are tolerances quoted for some cities.
Worst is +/-10% for Pittsburgh for power as opposed to lighting.
Regards
John Crabb, Development Excellence (Product
Hi,
Could someone please advise if the supply voltage tolerance for US
Argentina should be
+6-10% or +/-10% of 120V for US 220V for Argentina ?
Thanks in advance!
Jess
-
This message is coming from the emc-pstc discussion list.
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Annex 1 section 1.7.4 of the Machinery Directive contains as good a basic
desciption of what should be contained in an instruction manual as I know
of (although it's only in very general terms, of course). You can get the
full Annex free from
Hi Lucian,
I'm assuming you're talking about the wide-band pyramidal absorbers usually
found in anechoic chambers. Their attenuation characteristics are typically
measured one of three ways, depending on the frequency range of interest:
a. coaxial waveguide: for very low frequencies, from DC to
Hello group,
Does anybody know how to measure the absorption characteristics of the
carbon-impregnated foam pyramids? And is there any standard related to this?
Thanks in advance.
Lucian Yau
Can anyone steer me to an appropriate standard that would specify
Humidity tests for a heavy industrial product?
Best Regards,
Bill Jacowleff
Bill,
Appropriate covers a lot of ground. Especially since you didn't specify
your market (country, equipment category (e.g. semiconductor
Hi EMC-PSTC group,
Some of Compliance Engineers in this group would be interested in Reliability
tests.
AST = Accelerated Stress Test.
Barry
---
From: Bailin Ma b...@anritsu.com, on 11/10/99 4:09 PM:
Hi Harry,
You said that STRIFE is HP's HALT. Actually there's a slight
Kevin Listmates
I broke down and decided to check out EN 50103-4. Here is what I found:
CENELEC EN 50130-4:1995 Alarm systems - Part 4: Electromagnetic
compatibility - Product family standard: Immunity requirements for
components of fire, intruder and social alarm systems
There is an
There is a web site for RTCA which lists the current revisions and the
prices,
http://www.rtca.org/nonmember/
from just checking the site, the latest revision is DO-160D.
Stefen J. Munford
EMC Engineer
Gateway Regulatory/Compliance
610 Gateway drive MD Y-03
N. Sioux City, SD 57049
Phone -
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