Dell PowerEdge 4400 User Manual download pdf (Page 58)

accumulated.

You can also take the following steps to prevent damage from electrostatic discharge (ESD):

l When unpacking a static-sensitive component from its shipping carton, do not remove the component from the antistatic packing material

until you are ready to install the component in your computer. Just before unwrapping the antistatic packaging, be sure to discharge static

electricity from your body.

l When transporting a sensitive component, first place it in an antistatic container or packaging.

l Handle all sensitive components in a static-safe area. If possible, use antistatic floor pads and workbench pads.

The following notice may appear throughout this document to remind you of these precautions:

NOTICE: See "Protecting Against Electrostatic Discharge" in the safety instructions at the front of this guide.

Ergonomic Computing Habits

For comfort and efficiency, observe the following ergonomic guidelines when you set up and use your computer system:

l 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.

l Set the monitor at a comfortable viewing distance (usually 510 to 610 millimeters [20 to 24 inches] from your eyes).

l Make sure that the monitor screen is at eye level or slightly lower when you sit in front of the monitor.

l 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.

l Use a chair that provides good lower back support.

l Keep your forearms horizontal with your wrists in a neutral, comfortable position while you use the keyboard or mouse.

l Always leave space to rest your hands while you use the keyboard or mouse.

l Let your upper arms hang naturally at your sides.

l Sit erect, with your feet resting on the floor and your thighs level.

l 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.

l 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.

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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.

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Dell PowerEdge 4400 User Manual Page 58