Re: Question on 3m security system

[Margo Warner Curl <mcurl@xxxxxxxxxx>]

Early on we had a problem with dumb terminals interfering with 3M gates -
the alarm wouldn't go off when it was supposed to - so folks in our campus
physical plant built us heavy metal (aluminum?) 5-sided boxes that we st
the monitors as a shield.  WE now have newer 3M gates that don't have this
problem.  However, we have several dumb terminals close to a 3M
sensitizer/desensitizer, and these have problems (flickering screen, going
dead) that i think must be due to this proximity.  If I bring one of the
"sick" terminals to my office for a few days they seem to "get well" and do
fine ..
Margo

At 09:59 AM 3/14/2000 -0500, you wrote:
>This is a good point.  We're experiencing interference problems from our
>3M desensitizer units at the circulation desk.  They're causing big
>problems with the PC monitors.  It seems that if they're placed too close
>to the monitors they cause the screen to "shadow" along the edges and
>flicker.  Our 3M representative's solution was to move the units at least
>18 inches away from the monitors, however our desk set up really doesn't
>provide much leeway.  I'm just wondering if anyone else has experienced
>the same problem and knows of a way to resolve it (maybe some type of
>shield mat?).
>
>Ted Gutmann
>Computer Systems Administrator
>Emma S. Clark Memorial Library
>Setauket, New York
>tgutmann@xxxxxxxxxx
>---------------------------------------------------------------------------
>
>On Tue, 14 Mar 2000 herbisonm@xxxxxxxxxx wrote:
>
>> 
>> Several years ago we had problems with PC's that were too close to gates,
>> There was some sort of interference from the 3M system that effected the
>> PC's.
>> 
>> This might again be an issue with the conversion to the PC based Millennium
>> system
>> 
>> 
>> 
>> 
>> ------------------------------
>> Michael Herbison
>> Director of Libraries
>> Univ. of NE Kearney
>> Kearney, NE 68849-2240
>> Phone: (308) 865-8595
>> FAX     (308) 865-8722
>> Herbisonm@xxxxxxxxxx
>> 43
>> 
>
>
*************************

Margo Warner Curl
Technical Services Librarian
The College of Wooster Libraries
1140 Beall Avenue
Wooster, OH  44691

phone: 330/263-2154
fax: 330/263-2253
email: mcurl@xxxxxxxxxx