Rockwell Automation 2711-KA1_KC1_TA1_TA4_TC1_TC4 PanelView Terminals for DOS/Windows - Manual (Page 81)

Maintaining Your PanelView 1200
Chapter 5
Terminal
5-3
When the color terminal degausses, there is a 6.5 amp surge. The surge
lasts less than 400 milliseconds. If your PanelView 1200 terminal is
powered by an isolated power source, be sure the line transformer can
handle this surge.
Strong Magnetic Fields
Since the PanelView 1200 terminal display contains a CRT (cathode ray
tube), the presence of strong magnetic fields near the terminal will distort
the image on the screen. Magnetic fields stronger than 80 milligauss at the
front surface of the terminal should be avoided.