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WARNING: Installing Dell system components in a Dell rack
without the front and side stabilizers installed could cause the rack to tip over,
potentially resulting in bodily injury under certain circumstances. Therefore, always
install the stabilizers before installing components in the rack. After installing system/components in a rack, never pull more than one component out of the rack on its slide assemblies at one time. The weight of more than one extended component could cause the rack to tip over and injure someone. |
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NOTE: Dell’s servers, storage systems, and appliances are certified as components for use in Dell’s rack cabinet using the Dell customer rack kit. The final installation of Dell systems and rack kits in any other brand of rack cabinet has not been approved by any safety agencies. It is the customer’s responsibility to have the final combination of Dell systems and rack kits for use in other brands of rack cabinets evaluated for suitability by a certified safety agency. |
- System rack kits are intended to be installed in a Dell rack by
trained service technicians. If you install the kit in any other rack, be sure that the
rack meets the specifications of a Dell rack.
- Do not move large racks by yourself. Due to the height and weight of
the rack, Dell recommends a minimum of two people to accomplish this task.
- Before working on the rack, make sure that the stabilizers are secure
to the rack, extend to the floor, and that the full weight of the rack rests on the floor.
Install front and side stabilizers on a single rack or front stabilizers for joined
multiple racks before working on the rack.
- Always load the rack from the bottom up, and load the heaviest item
in the rack first.
- Make sure that the rack is level and stable before extending a
component from the rack.
- Use caution when pressing the component rail release latches and
sliding a component into or out of a rack; the slide rails can pinch your fingers.
- After a component is inserted into the rack, carefully extend the
rail into a locking position, and then slide the component into the rack.
- Do not overload the AC supply branch circuit that provides power to
the rack. The total rack load should not exceed 80 percent of the branch circuit rating.
- Ensure that proper airflow is provided to components in the rack.
- Do not step on or stand on any system/component when servicing other
systems/components in a rack.
Precautions for Products With Modems, Telecommunications, or Local Area Network Options
Observe the following guidelines when working with options:
- Do not connect or use a modem or telephone during a lightning storm.
There may be a risk of electrical shock from lightning.
- Never connect or use a modem or telephone in a wet environment.
- Do not plug a modem or telephone cable into the network interface
controller (NIC) receptacle.
- Disconnect the modem cable before opening a product enclosure,
touching or installing internal components, or touching an uninsulated modem cable or
jack.
- Do not use a telephone line to report a gas leak while you are in the
vicinity of the leak.
Precautions for Products With Laser Devices
Observe the following precautions for laser devices:
- Do not open any panels, operate controls, make adjustments, or
perform procedures on a laser device other than those specified in the product’s
documentation.
- Only authorized service technicians should repair laser devices.
When Working Inside Your Computer
Before you remove the computer covers, perform the following steps in the sequence indicated.
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CAUTION: Some Dell systems can be serviced only by trained service technicians because of high voltages and energy hazards. Do not attempt to service the computer system yourself, except as explained in this guide and elsewhere in Dell documentation. Always follow installation and service instructions closely. |
NOTICE: To help avoid possible damage to the system board, wait 5 seconds after turning off the system before removing a component from the system board or disconnecting a peripheral device from the computer.
- Turn off your computer and any devices.
- Ground yourself by touching an unpainted metal surface on the chassis, such as
the metal around the card-slot openings at the back of the computer, before touching
anything inside your computer.
While you work, periodically touch an unpainted metal surface on the computer chassis to dissipate any static electricity that might harm internal components.
- Disconnect your computer and devices from their power sources. Also, disconnect
any telephone or telecommunication lines from the computer.
Doing so reduces the potential for personal injury or shock.
In addition, take note of these safety guidelines when appropriate:
- 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 that both
connectors are correctly oriented and aligned.
- Handle components and cards with care. Don’t touch the
components or contacts on a card. Hold a card by its edges or by its metal mounting
bracket. Hold a component such as a microprocessor chip by its edges, not by its pins.
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CAUTION: There is a danger of a new battery exploding if it is incorrectly installed. Replace the battery only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer’s instructions. |
Protecting Against Electrostatic Discharge
Static electricity can harm delicate components inside your computer. To prevent static damage, discharge static electricity from your body before you touch any of your computer’s electronic components, such as the microprocessor. You can do so by touching an unpainted metal surface on the computer chassis.
As you continue to work inside the computer, periodically touch an unpainted metal surface to remove any static charge your body may have accumulated.
You can also take the following steps to prevent damage from electrostatic discharge (ESD):
- 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.
- When transporting a sensitive component, first place it in an antistatic container or
packaging.
- 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."
Ergonomic Computing Habits
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CAUTION: Improper or prolonged keyboard use may result in injury. |
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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 you set up and use 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 that the monitor screen is at eye level or slightly lower
when you sit 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 you use the keyboard or mouse.
- Always leave space to rest your hands while you use 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.
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