It is also interesting that 2mG limit closely approximates the "emotional"
one established through epidemiological studies.
Here in the Bay Area the field is around 50uT( 500mG )
It is my understanding that the magnetic field has been steadily declining.
>From the time of Christ until now it has dropped in half. And is evidently
on a decline towards zero (reversing poles) The significance? I was
told that every ice age was accompanied by a pole reversal (but not every
pole reversal is accompanied by an ice age)
- Robert -
Robert A. Macy, PE m...@california.com
408 286 3985 fx 408 297 9121
AJM International Electronics Consultants
619 North First St, San Jose, CA 95112
-----Original Message-----
From: Andrew Carson <acar...@uk.xyratex.com>
To: WELLMAN,RON (A-PaloAlto,ex1) <ron_well...@agilent.com>
Cc: 'richwo...@tycoint.com' <richwo...@tycoint.com>;
emc-p...@majordomo.ieee.org <emc-p...@majordomo.ieee.org>
List-Post: emc-pstc@listserv.ieee.org
Date: Tuesday, December 04, 2001 1:39 AM
Subject: Re: IATA
>
>You want Packing Instruction 902, within the section on Dangerous Goods.
>
>To summaries the limits are,
>
><2mG at measurement distance of 2.1m - Non Magnetic Material
>>2mG at a measurement distance of 2.1m - Hazardous Magnetic Material, must
be marked accordingly
>>5.25mG at a measurement distance of 4.6m - Can not be transported by
aircraft.
>
>Not much when you think the Earths magnetic field is 450 to 550mG
>
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