Hello all,
I would like to thank you all for your inputs on this thread. It turned out
to be much more interesting than I thought it could ever be. An I 've
learned quite abit more about concrete (from and electrical standpoint) than
I ever thought possible.
Once again, an example of the
I was just reminded that placing a battery on concrete will drain it, so
there must be conduction somewhere. Its amazing what one can learn from this
forum. Concrete was way down my list of things to look up.
As long as we have wandered down an unusual path I have one other question
that came up.
At 01:58 PM 23/08/1999 , Ali Elmi wrote:
Egon,
For evidence that concrete is in fact porous, all you have to do is look at
the black streaks near the top of Hoover Dam, which are the result of water
seeping through the dam over the years
I don't understand. If it is indeed leaking, why
Hi Listmembers:
I have been going through the pile of (564) emails accumulated during the
week that I have been gone, and I came across mention of a plastic film
product from Fuji which can measure the contact pressure of joined surfaces
(like the pressure of a conductive gasket). Just stick it
Just to add a bit of trivia to this discussion, concrete increases
substantially in conductivity in the presence of ionizing radiation (x-rays,
gamma rays). This is well known and documented in the nuclear hardening
community. This is an indication of an inherent population of free charge
You might try the following websites.
www.ic.gc.ca/
www.scc.ca/
Pryor McGinnis
c...@prodigy.net
-Original Message-
From: Aschenberg, Mat matt.aschenb...@echostar.com
To: Emc-Pstc (E-mail) emc-p...@ieee.org
List-Post: emc-pstc@listserv.ieee.org
Date: Monday, August 23, 1999 4:02 PM
Mat,
In Canada there are two official languages, English and French. Lists of
acceptable French translations
can be found in Canadian standards. Example: CSA 22.2 # 950 in annex NAA.
I hope this helps
John Radomski
Compliance Engineer
Inter-Tel Integrated Systems
Aschenberg, Mat
CISPR 11 talks about .equipment produced in series.. Has anyone
seen a definition of what equipment produced in series actually means? Is
there a time period involved? Does it have to be produced daily, weekly, or
monthly? Is a batch of 10 pieces of equipment produced once a year
Scott Egon:
What you are seeing with the concrete is a slow-moving chemical reaction
called efflorescence. Water can migrate from one side of a slab to another.
The water reacts with the lime in the cement, and ultimately moves through
the concrete, molecule by molecule.
My lab at General
Mathew,
The Consumer Packaging and Labeling Act which requires English and French
markings for products marketed to consumers is available at
http://strategis.ic.gc.ca.
I found this website when I was trying to determine if our products (I.T.E.
for commercial use only) needed labeling in
I read a message concerning Canadian labelling requirements, but then deleted
the message accidentally before replying - that's why I've lost the original
sender's address.
It's probably not exactly what you're looking for, but it does give a lot of
information, mainly about consumer labelling.
At 03:39 PM 8/20/99 -0600, POWELL, DOUG wrote:
Hello all,
I have a very innovative engineer who has come up with a design idea that
uses concrete as an insulating compound in a very large inductor for a 200
kW switching power supply. Yup, this is the stuff you buy down at the local
building
Properly poured and cured concrete can still pass water. This is why the
Uniform Building Code requires pressure-treated wood for wood in contact with
basement floors, unless a separate barrier (i.e., in addition to the
concrete) has been installed.
Mike Sherman
FSI International
-
Scott,
At 05:34 AM 23/08/1999 , you wrote:
I would beg to differ on your comment that Once the concrete is set, there
is very little, if any, water absorption. I have water wicking through the
concrete floor in my basement quite regularly. Having seen the salts that
are washed out of the
Just to add a bit of trivia to this discussion, concrete increases
substantially in conductivity in the presence of ionizing radiation (x-rays,
gamma rays). This is well known and documented in the nuclear hardening
community. This is an indication of an inherent population of free charge
Hello Everyone,
After two months, I've heard from the European Office. It seems that A.I.B.
doesn't want to except the manufactures statements or AES/APAVE's report for CE
marking.
My question for the group is What do I do next? I personally agree that the
filter should not be CE marked,
Doug,
Concrete may be made to work as an insulator, but conditions will have to be
carefully controlled. Most concrete tends to be somewhat hygroscopic,
although this varies with mix variables including type of aggregate used. I
have heard that large concrete pads are successfully being used as
Hi Brian,
As Luis points out, the 2 standards are directed at different applications.
However, I believe most of the tests required are the same. But I'm not sure
that the manufacturer of the pump would apply the same tests that I would
seek to apply. So I would look at EN61010-1 and see what
Doug,
Years ago, I worked in a facility where I was told General Electric made
inductors for powerline carrier systems that withstood 700kV from high
power transmission lines. These were made from some sort of ceramic
compound, formulated for insulating properties as well as structural
I have two products, one that incorperates an LED transmitter of 1330nm
wavelength and optical output of -14dBm and one that uses a class 1 laser
transmitter. Both are pulsed duration.
As far as I understand, the LED transmitter falls outside the IEC825
requirements as it is below the 1mW limit
Leslie Bai wrote:
I also would like to share with you my experience
when I did a TCF job years ago when I was
working in Singapore.
We know it is not possible to perform radiated
immunity testing at the customer's workshop.
It is just simply illegal!
But how would you verify the machine's
Hello...
I need a rumor confirmed or quashed. I have heard that
at a recent USCEL meeting in Seattle, the existing
procedure of reporting only the top 6 freqs is
no longer considered acceptable.
Can any one confirm this?
Thank you
Charles Grasso
StorageTek
2270 Sth 88th Street
Louisville CO
22 matches
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