Group:
I want to make sure I did this right.
I was trying to determine the permeability of this material.
The B-H curve shows Flux density B in Teslas. (1 tesla = 10,000 Gauss, )
But the Field Strength H is in A/cm. How do I convert this into
something I can use
The tricky part is making sure that the conversion is the right direction.
1 A/m = 0.01 A/cm
If you have oersteds and want amperes per meter, multiply by 79.577
If you have amperes per meter and want oersteds, multiply by 0.01257
- Robert -
Notice that the multiplier is 4*pi and a power of 10 if you are looking for
precision. I use 79.6 for meaningful engineering work that I deal with.
--
From: Robert Macy[SMTP:m...@california.com]
Reply To: Robert Macy
Sent: Monday, November 22, 1999 10:45 PM
To:
anechoic or semi-anechoic?
--
From: ron_cher...@densolabs.com
To: emc-p...@majordomo.ieee.org
Subject: FCC part 15 class B, testing
Date: Tue, Nov 23, 1999, 10:29 AM
I would like to know if I can take compliance data for FCC part 15 class B
in an anechoic chamber if I can't
vary
Hello all,
Would the NRTL program be a big plus for the ITE certified component, such
as power supply???
Tac Pham
HC Power, inc.
I tried to recall NRTLs that were approved for asessments of ITE to
UL1950. I did not overlook MET (listed in my note), but may have
missed NTS which may fit
Vitaly,
Allow me to try and clear some confusion over NRTLs and marks.
NRTL is not a mark. An NRTL is an OSHA Nationally Recognized
Testing Laboratory accredited to evaluate products to specific
standards for the U.S.
Each NRTL can authorize the use of its own mark for use on U.S.
products,
Hello out there,
I have some questions regarding the adoption if IEC60950 3rd Edition.
1) Now that IEC60950 3rd Ed. is now out and UL60950 3rd Ed. is out for
review, when will EN60950 catch up and follow IEC60950 3rd Ed.?
2) And for that matter, how about AS/NZ 3260 and other 950 derivatives?
I am looking for PC based EMC Automation software for an anechoic chamber
for FCC part 15 class B testing.
I have HP analyzers. I would also like the software to do automated NSA
meaurements.
Ron Chernus, Associate Test Engineer, DVT
Denso International
Carlsbad, California, USA
-
I would like to know if I can take compliance data for FCC part 15 class B
in an anechoic chamber if I can't
vary the receive antenna from 1 to 4 metres?? (The chamber is not tall
enough) Or do I need an OATS or GTEM?
I would also like to do FCC parts 22 and 24 on AMPS and PCS phones. Any
Graham,
In the second paragraph, I said CSA is recognized NRTL. Thus, CSA can
issue both NRTL and c-NRTL marks (as well as UL and c-UL marks as far as I
know). I would appreciate if you would mail me information on these two
NRTL marks.
My mailing address is: 20600 Prairie Street
George,
Do I have to feel sorry about opening this Pandora's Box (I seem to
originate this turn in discussion)? I meant to make innocuous remark
(referring to Orwell). Everyone benefits from clarification.
c-ETL is perfectly OK. As to NRTL mark(s), I know of recent agreement
between TUV
One rack unit is 1.75 inches. The allowable panel size is nU - 0.031. For
example, a 3U panel is (3 * 1.75) - 0.031 = 5.25 - 0.031 = 5.219.
-Original Message-
From: David Monreal [mailto:dmonr...@advancedshielding.com]
Sent: Monday, November 22, 1999 1:49 AM
To:
Thanks for that link George. That was a quick/concise list
that I was looking for. To get the information you mentioned (what the scope
of each CO is), you go to the link that I mentioned
http://www.scc.ca/search-front/index.html
http://www.scc.ca/search-front/index.html , click
Hi,
For a list of Accredited certification organizations go to
http://www.scc.ca/certific/colist.html
For the scope of Accredited certification organizations go to
http://www.scc.ca/search-front/indexacc.html
Ned Devine
Entela, Inc.
Program Manager III
Phone 616 248 9671
Fax 616 574 9752
Kevin,
Thanks for the website pointer. I found the site nearly impossible
to use via the search function. I got no hits for COs no matter
what I tried, including UL and Underwriters Laboratories. Somehow
I stumbled on to the following site which DOES list all COs.
I know ETL is one because I used to work there. But, they are not the only
ones. I assume reps from all the labs monitor this list and I am sure they
can contact you with their accreditation( I think there are many)
Please respond to geor...@lexmark.com
To: emc-p...@majordomo.ieee.org
cc:
You can check out the SCC website at www.scc.ca
http://www.scc.ca , click on accreditations and then certification
orgs and type in the name of your favorite test lab (or your least favorite
as the case may be :-) )to see if they are a CO. You can try a general
search for
S. William,
Thanks for the words on COs and TOs and SCCs. Apparantly UL is one or
more of these, as the c-UL mark is legally acceptable in Canada.
Now, what other COs has the SCC accredited to issue an approved Canadian
mark? Not CSA, but alternatives to CSA?
George
--
Hi Jess
I am afraid BSI does not give anything away for free. The publication
World Electricity Supplies number TH20338 is available from BSI at a cost
of £50.
http://www.bsi.org.uk/
Regards
Chris
-Original Message-
From: Jasmine TAN [SMTP:sb...@ctlsg.creaf.com]
Sent: 23 November
Hi all!
I hope you were referring to Missouri in the best
positive light. As you know, the Missouri ethic of
denying everything until it is shown to them, hits
them upside the head, and sits down to dinner with
them makes for the best compliance engineers.
Frank West
Sr. Engineer
TUV Rheinland
Good Morning Israel!
You want to purchase a copy of EN 983:1996. This
standard is Safety of Machinery, Safety of Fluid Power
Systems, Pneumatics. This standard explains in detail
the requirements for pneumatic systems on industrial
machinery.
Regards,
Frank West
Sr. Engineer
TUV Rheinland NA
Good Morning Janne!
It has been my experience that units seperate from the
control cabinet that supplies power to them are
grounded to the same ground potential as the the
cabinet, assuming you are not using an IT type power
system (which is what is used in the Nordic countries
for example)
Israel and PSNet,
Since you've asked about pneumatic controls, you are apparently
dealing with a machine - which would invoke the Machinery Directive.
The risk assessment which you will do (from EN 292) would flag your
assessment of the risks associated with the
Vitaly, your comment regarding CSA is incorrect. CSA is an NRTL just like the
others. CSA has a mark for NRTL approval.
Regards
G. Rae Dulmage
Gorodetsky, Vitaly wrote:
George,
You have overlooked MET, NTS, WYLE, SWRI and others. For a complete list
and the scope of recognition, go to
Hi Chris,
Is it in the web page which you could direct me to ?
Thanks in advance! ...Jess
Colgan, Chris chris.col...@tagmclarenaudio.com on 11/22/99 06:10:13 PM
To: 'Jasmine TAN' sb...@ctlsg.creaf.com
emc-p...@majordomo.ieee.org
cc:
Subject: RE: Supply tolerance for Brazil
Hi
During a quality inspection in my lab the inspector
I've got a non-conformity due to the lack of resistivity check on the
470 Kohm resistor employed to connect the reference plane of the ESD table
to the ground.
This is required according to EN 61000-4-2
Could anyone give me some hints in order
Hello to all,
This is focused to the knowledgeable folks in Canada and to others that
might know the answer(s) to this query.
In the USA, there exists the federal approval/listing requirements found in
29CFR Part 1910 Subpart S.
Does anyone know if there is a similar set of rules requiring
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