[8965] in Hotline Meeting
4-035 Jittery Screens --Progress!
daemon@ATHENA.MIT.EDU (larugsi@Athena.MIT.EDU)
Wed May 6 17:55:42 1992
From: larugsi@Athena.MIT.EDU
To: hotline@Athena.MIT.EDU
Cc: cec@Athena.MIT.EDU, joanne@Athena.MIT.EDU, burke@Athena.MIT.EDU,
Date: Wed, 06 May 92 17:54:53 EDT
I have once again teamed up with Don Haes, (Radiation Protection Office),
regarding the Jittery Monitor screens on the RS6000's. Don has obtained
some sophisticated equipment (as promised), and has measured a pretty healthy
magnetic field at the rear of the 4-035 cluster. The exact line is 3 and 1/2
tiles from the rear of the room. From one end of the rear of the room, to the
other end gives a magnetic field reading of, (PEAKS OUT) at 75 Milligauss,
which is 7 times higher than any office area should be. As you walk from the
rear of the room to the front of the room, the magnetic field drops off.
The jittery monitors also match this theory. From 3 feet off the floor the
reading is 13 and 1/2 milligauss. Don suspects that there is an A.C Cable
(alternating current) or a water pipe that is being used as a ground that is
causing this magnetism to the RS6000 monitors. Don is going to escalate this
issue with his dept. and will seek even more sophisticated equipment.
I believe that out next step is to also escalate the issue and sit down with
Physical Plant to look at blue prints/schematics of whats running under this
area. Don Haes will keep in touch with me via my pager, when he is ready to
make another move. Looks like this issue is certainly headed in the right
direction. Please keep me posted when this issue gets escalted.
Thanks Much,
--Lou
