Safety and Comfort Guide
© Copyright 2014 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.
Introduction This guide describes proper workstation setup, posture, and health and work habits for computer users at work, at home, at school, and on the go. In addition, this guide contains electrical and mechanical safety information applicable to all HP products. Also available at www.hp.com/ergo WARNING! Avoid excessive heat build-up with your notebook.
iv Introduction
Table of contents 1 Let comfort be your guide ................................................................................................................................. 1 Scan for awkwardness and adjust for comfort ..................................................................................... 1 Adopt healthy habits ............................................................................................................................. 2 Comfortable computing for children ..................
Damage requiring service .................................................................................................. 21 Servicing ............................................................................................................................ 21 Mounting accessories ........................................................................................................ 22 Ventilation ..........................................................................................................
Laser safety warnings ........................................................................................................ 27 Compliance with CDRH regulations .................................................................................. 27 Compliance with international regulations ......................................................................... 28 Laser product label ............................................................................................................
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1 Let comfort be your guide Scan for awkwardness and adjust for comfort Whenever you use a computer, you make decisions that can affect your comfort, health, safety, and productivity. This is true whether you use a desktop keyboard and monitor in an office, a notebook computer in a college dormitory, a tablet in the kitchen, or a handheld computer at the airport. In every case, you choose your body’s position relative to the technology.
move to stay comfortable and productive, or without awareness, you can slip into an uncomfortable and less productive posture. Throughout the day, you decide. STAY AWARE Scan for awkwardness and discomfort. Don’t slip into awkward, uncomfortable and less productive postures like “The Turtle.” Adopt healthy habits Build positive relationships at work and at home and find healthy ways to reduce stress. Breathe deeply and regularly.
2 Adjusting your chair Let the comfort of your feet, legs, back and shoulders be your guide To learn how to move between upright and reclined positions, you need to fully familiarize yourself with your chair adjustments. If you do not have a copy of the printed chair user guide, check the manufacturer’s website. Surprisingly, many people have never learned to utilize the full range of their chair adjustments. Taking the time to do so really pays off for your comfort and productivity. 1.
RIGHT Adjust tension to recline and, if helpful, use an angled footrest to maintain position. 3. Check to see if the chair has additional back support features that can be adjusted for comfort. If so, adjust the chair back support to match the natural curve of your spine. 4. You may find that supporting your forearms makes your shoulders more comfortable, but arm supports should not cause you to shrug your shoulders, put excessive pressure on your elbows, or “wing” your arms out to the sides.
Once you know how to use the chair adjustments, move between upright and reclined positions, scanning your body for comfort. You decide which postures and seated adjustments are most comfortable and productive. Your posture choice within your comfort zone will likely vary with your task. For example, you may find a reclined posture more comfortable for e-mail, and an upright posture more comfortable for tasks requiring frequent reference to papers or books.
3 Adjusting your work surface Let the comfort of your shoulders, arms and hands be your guide When you’re moving between postures, you may need to adjust your work surface for the comfort of your shoulders, arms, and hands. Your shoulders should be relaxed with your elbows hanging comfortably at your sides. Your forearms, wrists, and hands should be aligned in a straight, neutral position. The adjustment features of the work surface, keyboard, and pointing device affect your comfort and productivity.
WRONG Do not rest your palms on the work surface or bend your wrists markedly down. WRONG Do not bend your wrists markedly inward. Follow these work surface guidelines: ● Place the keyboard directly in front of you to avoid twisting your neck and torso. ● Adjust the height of the work surface for the comfort of your shoulders, arms, wrists, and hands. Your shoulders should be relaxed and your elbows should hang comfortably at your sides.
While typing, observe whether you have a heavy or light touch. Use the minimum force needed to depress the keys. Avoid holding unnecessary tension in your thumbs and fingers. You may be surprised to find tension in a thumb or finger that is not being used for typing, pointing or touching. Hold the pointing device loosely. Use your whole arm and shoulder to move the pointing device, not just your wrist. Keep your wrist straight and your hand relaxed and click the buttons using a light touch.
4 Adjusting your monitor Scan your head, neck and torso for comfort There is no one monitor placement that can keep all body parts happy at all times. Throughout the day, let the comfort of your eyes, neck, shoulders, and back help you determine what to move and when. Placement, zoom, and lighting are all important factors that affect your comfort and productivity. For example, if your eyes are getting dry, you may want to lower the monitor for a while and blink regularly.
WRONG Do not crane your neck forward. TIP: On some computers, the zoom setting can be adjusted up and down by holding down the ctrl key and rolling the mouse scroll wheel or by using the zoom gesture on the touchpad. RIGHT Adjust your viewing distance until you can read the text clearly. ● 10 To find your comfortable viewing distance, stretch your arm toward the monitor with a clenched fist and place the monitor near the location of your knuckles.
IMPORTANT: Research shows that many computer users, including young children, are viewing blurred images on their monitors because they have uncorrected vision. Children who cannot see clearly are more likely to experience impaired reading skills. All computer users should have their eyes checked regularly by a vision care specialist; some may need to start wearing glasses; others may need to update their prescriptions or have special glasses prescribed for computer use.
Adjusting dual monitors There are several different placement options to consider when using dual monitors. You may want to position one monitor directly in front of you and the other to the side. If you find you are rotating your head and neck to view an application on a display placed to the side for an extended period, move the application window to the display directly in front of you. Only applications needed for short periods should be viewed on the monitor placed to the side.
5 Using touch technology Using a touch-enabled monitor and all-in-one product Touch technology is great when you want to interact directly with objects on the screen. When using touch, you need to be especially attentive to the comfort of your neck, shoulders, and arms. Remember, there is no one monitor placement that can keep all body parts happy at all times, especially when using touch.
RIGHT Bring your touchscreen closer than arm’s length and adjust the tilt to keep your wrists neutrally aligned. WRONG Touching with an extended arm can quickly tire the shoulder and arm. For a given task, you may find yourself exclusively using touch as the method of input; in other circumstances you may find yourself using only the keyboard and pointing device; and sometimes you may choose a combination of both input methods.
WRONG Do not hunch forward over your touchscreen, leaving your back unsupported by your chair. Using a touch-enabled tablet It is especially important to scan for awkward head and neck posture when using touch-enabled tablets. If you use this technology often and find you have discomfort in your neck, shoulders, and back, you may be looking down at the screen for extended periods.
RIGHT For neck comfort, you may want to try a height-adjustable accessory for your tablet.
6 Using a Notebook Listen to your body especially when using a notebook Because notebook computers are mobile, they allow you to easily move from one place to another. At home, you may move from the home office to the kitchen table and even stand for a while at the kitchen counter. If you travel on business, you can easily move from the hotel room desk to the client conference room, or to a remote field office.
7 Carefully monitoring children using computers A special note for parents and teachers It is important to encourage moderation in children’s computer use. Children use computers a lot; they use them at school and at home for study and for play. Monitor and guide the children in your care—start early, start now, and insist that they take breaks. Children’s bodies are still growing and developing, and their habits while using the computer can affect their future health and fitness.
8 Monitoring your health habits and exercise The comfort and safety of working at the computer can be affected by your general state of health. Studies have shown that a variety of health conditions may increase the risk of discomfort, muscle and joint disorders, or injuries. If you have any of the health conditions or factors listed below, it is particularly important to stop what you are doing on a regular basis and frequently scan your body for awkwardness or discomfort.
9 Electrical and mechanical safety HP products are designed to operate safely when installed and used according to the product instructions and general safety practices. The guidelines included in this section explain the potential risks associated with computer operation and provide important safety practices designed to minimize these risks.
Chemical fumes and vapors ● Radiation Noise, ionizing, laser, ultrasonic waves Installation requirements HP products operate safely when used according to their marked electrical ratings and product usage instructions. They should always be used in accordance with the requirements of local and regional building and wiring codes intended for the safe use of IT equipment. IMPORTANT: HP products are intended for use in dry or sheltered environments unless otherwise stated in the product information.
Mounting accessories Do not use the product on an unstable table, cart, stand, tripod, or bracket. The product may fall, causing serious bodily injury and serious damage to the product. Use only with a table, cart, stand, tripod, or bracket recommended by HP, or sold with the product. Ventilation Slots and openings in the product are provided for ventilation and should never be blocked or covered, since these ensure reliable operation of the product and protect it from overheating.
The power cord must be properly rated for the product and for the voltage and current marked on the product's electrical ratings label. The voltage and current rating of the cord should be greater than the voltage and current rating marked on the product. In addition, the diameter of the wire must be a minimum of 0.75 mm2 /18AWG and the cord should be between 5 and 8 feet (1.5 and 2.5 meters) long. If you have questions about the type of power cord to use, contact the service partner.
Hot surfaces Allow the equipment's internal components and hot-pluggable drives to cool before touching them. Object entry Never push a foreign object through an opening in the product. Precautions for portable computer products In addition to the general precautions described earlier, be sure to observe the following precautions when operating a portable computer product. Failure to observe these precautions could result in fire, bodily injury, and damage to the equipment.
Accessories and options Installation of accessories and options in safety interlocked areas should performed only by individuals who are qualified in servicing computer equipment and trained to deal with products capable of producing hazardous energy levels. Products with casters Products provided with casters should be moved with care. Quick stops, excessive force, and uneven surfaces may cause the product to overturn.
Precautions for products with external television antenna connectors In addition to the general precautions described earlier, be sure to observe the following precautions when using external television antennas with your product. Failure to observe these precautions could result in fire, bodily injury, and damage to the equipment. Compatibility HP television tuner cards with antenna connections should be used only with HP personal computers that are intended for home use.
3. Ground Clamps 4. Grounding Conductors (NEC Section 810-21) 5. Antenna Discharge Unit (NEC Section 810-20) 6. Ground Clamp 7. Antenna Lead-in Wire Precautions for products with modems, telecommunications, or local area network options In addition to the general precautions described earlier, be sure to observe the following precautions when operating telecommunications and network equipment. Failure to observe these precautions could result in fire, bodily injury, and damage to the equipment.
Compliance with international regulations All HP systems equipped with a laser device comply with appropriate safety standards including IEC 60825 and IEC 60950. Laser product label The following label or equivalent is located on the surface of your laser device. This label indicates that the product is classified as a CLASS 1 LASER PRODUCT. Symbols on equipment The following table contains safety icons that may appear on HP equipment.
Any product or assembly marked with these symbols indicates that the component exceeds the recommended weight for one individual to handle safely. WARNING: To reduce the risk of personal injury or damage to the equipment, observe local occupational health and safety requirements and guidelines for manual material handling. This symbol indicates the presence of a sharp edge or object that can cause cuts or other bodily injury.
10 More information If you want more information about arrangement of work space and equipment or safety standards, refer to the following organizations: American National Standards Institute (ANSI) 11 West 42nd St. New York, NY 10036 http://www.ansi.org Human Factors and Ergonomics Society (HFES) P.O. Box 1369 Santa Monica, CA 90406-1369 http://www.hfes.org International Electrotechnical Commission (IEC) Central Secretariat 3, rue de Varembé P.O. Box 131 CH1211 GENEVA 20, Switzerland http://www.iec.
Linnégatan 14 SE-114 94 Stockholm, Sweden http://www.tcodevelopment.
Index A accessories 25 antenna grounding monitor adjusting guidelines 9 placement 9, 11, 12 support cover 24 26 B battery pack 24 N neck 1, 9, 17 C casters 25 chair height 3 chemical safety 20 children 2, 18 O options 25 overheating warning P parent monitoring 18 pointing 7 positions 5 reclined 1 seated 1 standing 1 power cord 22 power lines 26 power supply 25 power surge 26 D docking base 24 dual monitors 12 E electric shock 20 electrical safety 20 energy safety 20 F fingers 7 fire 20 footrest 3 for
