Re: Magnetic Field Surveys

[Peter Fundarek <P.FUNDAREK@utoronto.ca>]

On Wed, 1 May 1996 11:27:07 -0400 Christopher M. Meyer 
wrote:


> We are still in the midst of just such a problem.  The DC 
fields, while
> within the acceptable range in some adjacent offices, did 
affect computer
> monitors.  By extension, the people in those offices 
assumed that if the
> fields can affect their monitors, there is no telling what 
damage it is
> doing to their long-term health. 

At the University of Toronto, we had a similar problem with 
computer monitors being affected but the cause was not an 
NMR unit. There was a perceptible shift in color when the 
monitors were moved closer to the wall and the people in the 
area were concerned about exposure.  It took a while to 
track down the cause but finally determined that it was 
magnetized rebar in the concrete walls!  As far as I know, 
there has been no attempt to remove the rebar.  Now if it 
had been the slightest bit radioactive........

*************************************
Regards,
Peter J. Fundarek
University of Toronto
CANADA
email:  p.fundarek@utoronto.ca
phone:  (416) 978-2374
fax:  (416) 971-1384
*************************************