Subject:  Re EMF-L Measurement Protocols
Date:     Thu, 24 Jul 1997 103317 -0500 (CDT)
From:     "Vali Yousefi" <Vali@ncoh.pwv.gov.za>
To:       Multiple recipients of list <emf-l@mail.llion.org>
--------------------------------------------------

Dear Karl
Thank you very much for the fax regarding the new publication
announcement, which I received sometimes around three to four in
the morning at home.
Please make note of my work number as +02711 720 6608 and kindly
use this when it is very late.
I asked our librarian to order the book. Please save one for us. It
may take a bit longer than usual to get our order, because of the
bureaucracy, etc.
I would like to get some research training in this field. Do you
know any recognized institute?
 I am looking forward to hearing from you soon.
Yours truly

Vali Yousefi
Date:          Thu,
24 Jul 1997 08:41:26 -0500 (CDT)
> Reply-to:      emf-l@mail.llion.org
> From:          kriley3@ix.netcom.com
> To:            Multiple recipients of list 
> Subject:       Re: EMF-L: Measurement Protocols

> Andrea: You will find power frequency measurement protocols in my
> book, Tracing EMFs in Building Wiring and Grounding, the contents of
> which I faxed to you last night. But protocols vary depending on what
> the purpose of the study is. Epidemiologists have at times taken only
> one measurement per house. I take measurements throughout the building
> in a grid of about every six feet, with a three-axis gaussmeter. But
> my purpose is to locate sources for mitigation. I switch to single
> axis for locating sources and also to tell if the field from a power
> line is balanced or if there is net current on the line.
> The Dr. Gauss meter, which measures up to 10 mG, is probably the best
> of the cheapies, but it has a linear response to frequency, which
> means it does not read harmonic frequencies correctly. It will read a
> 4 mG field produced by the third harmonic as 12 mG. Best to use a
> meter with a flat frequency response over the frequency band of
> interest. Karl Riley
>


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Reprinted with permission of Roy Beavers, http://www.feb.se/EMF-L/EMF-L.html