Rockwell Automation 6158 Industrial 21 inch CRT Monitors - Manual (Page 17)

Industrial 21" CRT Monitor 17
Publication 6158-5.0
Contrast Control ( )
Use the contrast control to vary the difference between the display’s light
and dark elements. With a suitable image displayed on the screen, adjust
the contrast control to achieve the best balance between image brightness
and fine detail rendition. The optimum setting may vary slightly with
different types of displays and changes in ambient lighting, as well as
individual taste.
Manual Degaussing Button ( )
The display screen is degaussed automatically each time the monitor is
powered on. This degaussing eliminates color impurities and other
distortions of the display by neutralizing the effects of magnetic fields in
the surrounding environment.
When the unit is left on for a long period, or is repositioned following
power-up, the screen may pick up additional magnetic flux, causing
colors to appear ”blotchy” or otherwise distorted. If this happens,
degauss the screen manually by pressing the degaussing button. For full
effectiveness, allow at least fifteen minutes between manual degaussings.
Shorter intervals may result in an incomplete removal of flux and
residual color impurities. If the unit is located near electric transformers,
motors, loudspeakers or other strong magnetic sources, degaussing alone
may not be sufficient to eliminate interference. Try reorienting the unit
relative to the magnetic source or moving the monitor further away.
Vertical Size ( )
Use this control to make the display taller or shorter. Consult the chart
following for recommended display height.
Vertical Position ( )
Use this control to center the display vertically on the screen.
Horizontal Size ( )
Use this control to make the display wider or narrower. Consult the chart
below for recommended display width.
Horizontal Position ( )
Use this control to center the display horizontally on the screen.