Dell OptiPlex NX1 User's Guide - Page 4

nearby windows to minimize reflections and glare on the monitor screen.

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Do not spill food or liquids on your computer. If the computer gets wet, call your network administrator. Do not push any objects into the openings of your computer. Doing so can cause fire or electric shock by shorting out interior components. Keep your computer away from radiators and heat sources. Also, do not block cooling vents. Avoid placing loose papers underneath your computer, and do not place your computer in a closed-in wall unit or on a bed, sofa, or rug. When you disconnect a cable, pull on its connector or on its strain-relief loop, not on the cable itself. Some cables have a connector with locking tabs; if you are disconnecting this type of cable, press in on the locking tabs before disconnecting the cable. As you pull connectors apart, keep them evenly aligned to avoid bending any connector pins. Also, before you connect a cable, make sure both connectors are correctly oriented and aligned. For comfort and efficiency, observe the following ergonomic guidelines when setting up and using your computer system: Position your system so that the monitor and keyboard are directly in front of you as you work. Special shelves are available (from Dell and other sources) to help you correctly position your keyboard. Set the monitor at a comfortable viewing distance (usually 510 to 610 millimeters [20 to 24 inches] from your eyes). Make sure the monitor screen is at eye level or slightly lower when you are sitting in front of the monitor. Adjust the tilt of the monitor, its contrast and brightness settings, and the lighting around you (such as overhead lights, desk lamps, and the curtains or blinds on nearby windows) to minimize reflections and glare on the monitor screen. Use a chair that provides good lower back support. Keep your forearms horizontal with your wrists in a neutral, comfortable position while using the keyboard or mouse. Always leave space to rest your hands while using the keyboard or mouse. Let your upper arms hang naturally at your sides. Sit erect, with your feet resting on the floor and your thighs level. When sitting, make sure the weight of your legs is on your feet and not on the front of your chair seat. Adjust your chair's height or use a footrest, if necessary, to maintain proper posture. Vary your work activities. Try to organize your work so that you do not have to type for extended periods of time. When you stop typing, try to do things that use both hands. vi

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vi
²
Do not spill food or liquids on your computer. If the computer gets wet, call your
network administrator.
²
Do not push any objects into the openings of your computer. Doing so can cause
fire or electric shock by shorting out interior components.
²
Keep your computer away from radiators and heat sources. Also, do not block
cooling vents. Avoid placing loose papers underneath your computer, and do not
place your computer in a closed-in wall unit or on a bed, sofa, or rug.
²
When you disconnect a cable, pull on its connector or on its strain-relief loop, not
on the cable itself. Some cables have a connector with locking tabs; if you are dis-
connecting this type of cable, press in on the locking tabs before disconnecting
the cable. As you pull connectors apart, keep them evenly aligned to avoid bend-
ing any connector pins. Also, before you connect a cable, make sure both
connectors are correctly oriented and aligned.
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For comfort and efficiency, observe the following ergonomic guidelines when setting
up and using your computer system:
²
Position your system so that the monitor and keyboard are directly in front of you
as you work. Special shelves are available (from Dell and other sources) to help
you correctly position your keyboard.
²
Set the monitor at a comfortable viewing distance (usually 510 to 610 millimeters
[20 to 24 inches] from your eyes).
²
Make sure the monitor screen is at eye level or slightly lower when you are sitting
in front of the monitor.
²
Adjust the tilt of the monitor, its contrast and brightness settings, and the lighting
around you (such as overhead lights, desk lamps, and the curtains or blinds on
nearby windows) to minimize reflections and glare on the monitor screen.
²
Use a chair that provides good lower back support.
²
Keep your forearms horizontal with your wrists in a neutral, comfortable position
while using the keyboard or mouse.
²
Always leave space to rest your hands while using the keyboard or mouse.
²
Let your upper arms hang naturally at your sides.
²
Sit erect, with your feet resting on the floor and your thighs level.
²
When sitting, make sure the weight of your legs is on your feet and not on the
front of your chair seat. Adjust your chair’s height or use a footrest, if necessary,
to maintain proper posture.
²
Vary your work activities. Try to organize your work so that you do not have to
type for extended periods of time. When you stop typing, try to do things that
use both hands.