eMachines Flat Panel Monitor - Manual (Page 14)

Using Your eMachines Flat-Panel Monitor
10
Ergonomic guidelines
The recommended screen positioning is based upon the following guildelines. These guidelines
are based on available scientific literature and published standards.
Screen height
The recommended screen height for displays (except in special circumstances, such as for bifocal
use) is that the top of the display should be set at or slightly below (about 1 inch or 25 mm) your
eye level while you are sitting in a comfortable working posture. This guideline places the center
of the screen at an ideal 15° to 20° viewing angle for most desktop displays. If the display has
multiple users, the screen height should be easily adjustable to accommodate each user’s height
and preference.
Screen tilt
The screen should be tilted so your line of sight is perpendicular to the screen. This angle creates
the most consistent viewing distance when scanning from the top of the screen to the bottom.
You may need to adjust lighting to avoid screen glare when the screen is tilted upward.
Screen distance from user
The screen should first be placed at arm’s length from the user, then adjusted back and forth to
suit individual preference.
Connecting the USB hub
The optional USB stand has a built-in, 4-port, USB 2.0 hub. To use these USB ports, you need to
connect the hub to a power outlet and to your computer.
To connect your USB stand’s built-in USB hub:
1 Plug the included USB cable into the USB In port on the back of your USB stand and into a
USB 2.0 port on your computer. If you connect the stand to a USB 1.1 port on your computer,
the stand’s USB hub operates in USB 1.1 mode (much slower than USB 2.0).
2 To provide full power to your stand’s USB ports (recommended), connect the AC power
adapter to the power connector on the back of your USB stand and into an AC power outlet.
USB In port
Power connector USB 2.0 ports
8512327.book Page 10 Thursday, May 10, 2007 3:45 PM