Elo TouchSystems ENTUITIVE TOUCHMONITOR ET1545C - Manual (Page 26)

Chapter 3 : Operation
20 - Elo Entuitive Touchmonitor CRT Rear Mount User Guide
Degauss
External magnetic fields may cause distortion or discolora-
tion in the picture. Demagnetizing takes place automatically
when the display unit is switched on, and the unit normally
maintains faultless color purity during operation.
If you have tilted, swiveled or moved the display unit, you can
perform demagnetization. During the process the picture is
distorted for a few seconds. After demagnetization, the color
impurities have disappeared if caused by stray magnetic
fields.
Do not use the degauss feature more than once every half
hour or the degauss function will not work.
Brightness Adjusts the brightness of the screen.
Contrast Adjusts the contrast of the screen.