Dell 4300 manual Ergonomic Computing Habits

2H930bk1.book Page 10 Tuesday, November 20, 2001 5:02 PM

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•To help prevent electric shock, plug the computer and device power cables into properly grounded power sources. These cables are equipped with 3-prong plugs to help ensure proper grounding. Do not use adapter plugs or remove the grounding prong from a cable. If you must use an extension cable, use a 3-wire cable with properly grounded plugs.

•To help protect your computer from sudden, transient increases and decreases in electrical power, use a surge suppressor, line conditioner, or uninterruptible power supply.

•Be sure that nothing rests on your computer’s cables and that the cables are not located where they can be stepped on or tripped over.

•Do not spill food or liquids on your computer. If the computer gets wet, contact Dell (see page 100).

•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; do not place your computer in a closed-in wall unit or on a bed, sofa, or rug.

Ergonomic Computing Habits

CAUTION: Improper or prolonged keyboard use may result in injury.

CAUTION: Viewing the monitor screen for extended periods of time may result in eye strain.

For comfort and efficiency, observe the following ergonomic guidelines when setting up and using your computer:

•Position your computer 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.

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