HP Internet Appliances Safety & Comfort Guide
Contents
1. Is your monitor s entire viewing area located just below your eye height Is your monitor tilted so your face and the monitor are parallel Have you adjusted the brightness and contrast controls to improve the quality of text and graphics Is your document holder positioned near the monitor at the same distance height and angle as the monitor Safety and Comfort 25 Notebook Computing General Prevention Do you change postures frequently Do you avoid resting your wrists on your thighs while typing To avoid neck fatigue when using the computer on a sofa or bed do you avoid reclining too far Where possible have you tried using a full size keyboard and detached pointing device such as a mouse or trackball with your notebook computer Similarly have you tried using a full size monitor Do you take breaks and walk around briefly at least once per hour Do you exercise regularly Periodically do you take inventory of the stress in your life and change what is within your control to change If you experience any symptoms that you think may relate to your using a computer whether you experience them during work or at other times have you consulted a doctor and if available your company s health and safety department HINT DOUBLE CHECK Review your postures and habits using this checklist Periodically reread this section Listen to your body Anytime you make changes to your tasks work2. Use only the options and upgrades recommended by Compaq Safety and Comfort 3l Precautions for Portable Computer Products Precautions for Server and Network Products 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 In addition to the general precautions described earlier in this section 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 Monitor Support Cover Do not place a monitor with an unstable base or a monitor heavier than 55 pounds 25 kilograms on top of a monitor support cover Instead place the monitor on a work surface next to the docking base Rechargeable Battery Do not crush puncture or incinerate the battery pack Pack or short the metal contacts In addition do not attempt to open or service the battery pack Docking Base To avoid pinching your fingers do not touch the rear of the computer when docking it into a base In addition to the general precautions described earlier in this section be sure to observe the following precautions when operating server and network products Failure to observe these precautions could result in fire bodily injury and damage to the equipment Safety interlocks and enclosur
3. can increase your neck comfort as you refer back and forth between your papers and the display screen by helping you keep your head balanced over your shoulders If your primary task is typing from paper documents you may find it more comfortable to place your document holder directly in front of you and your monitor slightly to one side or on a slant board between your monitor and keyboard Consider this option only if you spend more time looking at the paper than at your monitor WRONG s Don t arrange your work area in a way that causes you to repeatedly strain forward to see and reach frequently used items such as books papers or a phone Safety and Comfort 15 Phone Cradling your phone between your ear and shoulder may lead to neck shoulder and back discomfort If you use your phone a lot try using a headset or positioning your phone so you pick it up with your non dominant hand This frees your dominant hand for note taking When not in use place the phone within easy reach RIGHT Use a headset to free your hands and help you avoid uncomfortable positions WRONG Don t cradle your phone between your ear and shoulder 16 Safety and Comfort Working in Comfort Using a Notebook Computer Maintaining a high level of comfort when using a notebook computer may be more challenging than when using a desktop computer Therefore you should be especially alert to your body s signals such
4. disconnect power from the system by unplugging all power cords from the power supplies Floor standing products Be sure the bottom stabilizers on the equipment are installed and fully extended Ensure that the equipment is properly stabilized and supported before installing options and cards Rack mountable products Because the rack allows you to stack computer components vertically you must take precautions to provide for rack stability and safety Do not move large racks by yourself Due to the height and weight of the rack Compaq recommends a minimum of two people to accomplish this task Before working on the rack be sure the leveling jacks feet extend to the floor and that the full weight of the rack rests on the floor Also install stabilizing feet on a single rack or join multiple racks together before starting work Always load the rack from the bottom up and load the heaviest item in the rack first This makes the rack bottom heavy and helps prevent the rack from becoming unstable Ensure that the rack is level and stable before extending a component from the rack Safety and Comfort 33 Precautions for Products with External Television Antenna Connectors Extend only one component at a time The rack may become unstable if more than one component is extended Usecaution when pressing the component rail release latches and sliding a component into the rack The slide rails could
5. guidelines for proper grounding and in particular specifies that the cable ground shall be connected to the grounding system of the building as close to the point of cable entry as practical No Component Electric Service Equipment Power Service Grounding Electrode System NEC Art 250 Part H Ground Clamps Grounding Conductors NEC Section 810 21 Antenna Discharge Unit NEC Section 810 20 Ground Clamp ecocccoc Antenna Lead in Wire 36 Safety and Comfort Precautions for In addition to the general precautions described earlier in this section be sure to Products with observe the following precautions when operating telecommunications and network Modems equipment Failure to observe these precautions could result in fire bodily injury and Telecommuni damage to the equipment cations or Local Do not connect or use a modem or telephone other than a cordless type during ahs Network a lightning storm There may be a remote risk of electric shock from lightning ptions Never connect or use a modem or telephone in a wet location Do not plug a modem or telephone cable into the Network Interface Card 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 All
6. pinch your fingers Do not overload the AC supply branch circuit that provides power to the rack The total rack load should not exceed 80 of the branch circuit rating In addition to the general precautions described earlier in this section 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 Compaq television tuner cards with antenna connections should be used only with Compaq personal computers that are intended for home use External television antenna grounding If an outside antenna or cable system is connected to the product be sure the antenna or cable system is electrically grounded to protect against voltage surges and built up static charges Article 810 of the National Electrical Code ANSI NFPA 70 provides information about proper electrical grounding of the mast and supporting structure grounding of the lead in wire to an antenna discharge unit size of grounding conductors location of antenna discharge unit connection to grounding electrodes and requirements for the grounding electrode Lightning protection To protect a Compaq product during a lightning storm or when it will be unattended and unused for long periods of time unplug the product from the electrical outlet and disconnect the antenna or cable system This prevents damage to the product d
7. variety of health conditions may increase the risk of discomfort muscle and joint disorders or injuries These preexisting conditions include Hereditary factors Arthritis and other connective tissue disorders Diabetes and other endocrine disorders Thyroid conditions Vascular disorders Generally poor physical condition and dietary habits Prior injuries traumas and musculoskeletal disorders Excessive weight Stress Smoking Advancing age 99 999999999 Pregnancy menopause and other conditions affecting hormone levels and water retention Monitoring personal tolerance levels and limits Different users of computers have different levels of tolerance for intensive work over a long period Monitor your personal tolerance levels and avoid regularly exceeding them If any of the listed health conditions apply to you it is particularly important to know and monitor your personal limits Cultivating health and fitness Additionally your overall health and tolerance for the rigors of work typically can be improved by avoiding adverse health conditions and by exercising regularly to improve and maintain your physical fitness 22 Safety and Comfort Organizing Your Adjustments From the Ground Up From the Top Down The order in which you follow the advice in this chapters depends on the adjustability of your work surface If your work surface height adjusts then systematically adjust yourself and your co
8. wall plug having overload protection This is a safety feature If the plug needs to be replaced be sure the Compaq authorized service provider uses a replacement plug specified by the manufacturer as having the same overload protection as the original plug Extension cord If an extension cord or power strip is used make sure that the cord or strip is rated for the product and that the total ampere ratings of all products plugged into the extension cord or power strip do not exceed 80 of the extension cord or strip ampere ratings limit Overloading Do not overload an electrical outlet power strip or convenience receptacle The overall system load must not exceed 80 of the branch circuit rating If power strips are used the load should not exceed 80 of the power strip input rating Cleaning Unplug the product from the wall outlet before cleaning Do not use liquid cleaners or aerosol cleaners Use a damp cloth for cleaning Heat The product should be placed away from radiators heat registers stoves or other pieces of equipment including amplifiers that produce heat Replacement parts When replacement parts are required be sure the service provider uses replacement parts specified by Compaq Safety check Upon completion of any service or repairs to the product have your Compaq authorized service provider perform safety checks to determine that the product is in proper operating condition Options and upgrades
9. 212495 001 www compaq com Contents Safety and Comfort Promoting a Safe and Comfortable Work Environment 0cceesecescceeeeues 1 2 Important Choices cd ceo cn occ a cd x a 1 2 Take Action for Safety and Comfort 1 2 Key Principles adi asta dapi Ope d ipo e d VC Oe ee Tee Raa 1 3 Finding Your Comfort Zone si ai AN AEA AA AAAA A EA AAAA A AA TAAA 1 4 A Range of Positioris xcci esc exce EINTE ELUA TARTEA TURKER KA 1 4 Different Tasks Different Postures 0 0 0 ccc 1 5 Organizing Your Adjustments saa 1 5 Feet Knees and Legs ise dv Dem d v cone ene ga 1 6 BaCk ann face tetedep iden rap iius detis setae a aa aa a atit 1 7 Forearms Wrists and Hands iiisssssssssseee nent eens 1 8 Shoulders and EIDOWS 25 xxetzizrtzirths Rez kt ee Rr e edd us 1 9 Ey6S ks Le ee ere eL n Eni hh hoe hore Er c E bed 1 9 Arranging Your Work Area mmn 1 10 Monito zie eta Se Af ente eI eL ADU retener seit eb ssPUDAf eere 1 10 Keyboard and Pointing Device ssssssssssssee eens 1 13 Arm Supports and a Palm Rest 1 14 Papers and BOOKS cese epic obosor ecu mes educ uer udis RE MEOS 1 15 dac P 1 16 Working in Comfort cccccceeceecescceeeeeeesseeeeeeeeseeeeeeteeagauees 1 17 Using a Notebook Computer e 1 17 Typing Style xo digerere tu e ifs cete gus utei ty Sofed D 1 18 POINKNG StVlen ree cue EE un eee XE NEA UU RR RU c D i an t D e 1 19 Using a Keyboard ona Sofa 6 eee e 1 20 Taking Breaks a
10. 4 FAX 513 533 8573 http www cdc gov niosh homepage html EMAIL pubstaft cdc gov Human Factors and Ergonomics Society ANSI HFS 100 1988 Standard P O Box 1369 Santa Monica CA 90406 1369 TEL 310 394 1811 FAX 310 394 2410 http hfes org EMAIL hfes compuserve com Safety and Comfort 39 International Standards Organization ISO Central Secretariat International Organization for Standardization 1 rue de Varemb Case postale 56 CH 1211 Gen ve 20 Switzerland TEL 41 22 749 01 11 FAX 41 22 733 34 30 http www iso ch http www iso ch infoe stbodies html EMAIL central Q1so ch National Safety Council Library 1121 Spring Lake Dr Itasca IL 60143 3201 TEL 630 775 2199 FAX 630 285 0242 http www nsc org EMAIL bob nsc dupagels lib il us Occupational Safety and Health Administration OSHA Publications Office U S Department of Labor 200 Constitution Ave NW Room N3101 Washington DC 20210 http www osha gov http www osha slc gov ergo http www osha gov oshpubs oshapubs TCO Information Center 150 North Michigan Ave Suite 1200 Chicago IL 60601 7594 TEL 312 781 6223 FAX 312 346 0683 http www tco info com chicago html EMAIL info tco info com Safety and Comfort
11. Compaq systems equipped with a laser device comply with safety standards Products with including International Electrotechnical Commission IEC 825 With specific regard Laser Devices to the laser the equipment complies with laser product performance standards set by government agencies for a Class 1 laser product The product does not emit hazardous light the beam is totally enclosed during all modes of customer operation and maintenance Laser Safety Warnings In addition to the general precautions described earlier in this section be sure to observe the following warnings when operating a product equipped with a laser device Failure to observe these warnings could result in fire bodily injury and damage to the equipment AN WARNING To reduce the risk of exposure to hazardous radiation Donottry to open the unit enclosure There are no user serviceable components inside Do not operate controls make adjustments or perform procedures to the laser device other than those specified herein Allow only Compaq Authorized Service technicians to repair the unit Safety and Comfort 37 Compliance with CDRH Regulations The Center for Devices and Radiological Health CDRH of the U S Food and Drug Administration implemented regulations for laser products on August 2 1976 These regulations apply to laser products manufactured from August 1 1976 Compliance is mandatory for products marketed in the United States
12. Compliance with International Regulations All Compaq systems equipped with a laser device comply with appropriate safety standards including IEC 825 and IEC 950 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 CLASS 1 LASER PRODUCT Laser information Laser Type Semiconductor GaAlAs Wave Length 780 nm 35 nm Divergence Angle 53 5 degrees 0 5 degrees Output Power Less than 0 2 m W or 10 869W m sr Polarization Circular 0 25 Numerical Aperture 0 45 inches 0 04 inches Safety and Comfort For More Information If you want more information about arrangement of work space and equipment or safety standards consult the following references American National Standard for Human Factors Engineering of Visual Display Terminal Workstations ANSI HFS Standard No 100 1988 Human Factors Society Inc P O Box 1369 Santa Monica CA 90406 Working Safely with Your Computer Washington D C National Safety Council 1991 Or write to American National Standards Institute 11 West 42nd St New York NY 10036 TEL 212 642 4900 FAX 212 398 0023 http www ansi org EMAIL info ansi org National Institute for Occupational Safety and Health NIOSH NIOSH Publications 4676 Columbia Pkwy MS C 13 Cincinnati OH 45226 1998 TEL 800 356 467
13. al software tools are available that remind you to take breaks at intervals you specify During your breaks stand up and stretch especially any muscles and joints you may have held in an extended static posture while using the computer Vary your tasks Examine your work habits and the types of tasks you perform Break up the routine and try to vary your tasks during the day By doing so you may avoid sitting in one position or performing the same activities continuously for several hours using your hands arms shoulders neck or back For example you could print out your work to proofread rather than proofing from your monitor Reduce sources of stress Take an inventory of things at work that are stressful to you If you perceive that your physical or psychological health is being affected take time to evaluate what changes you can make to reduce or eliminate the sources of stress Cd Y HINT Try it and see Contrary to what some may believe several studies have found that productivity does NOT decline when frequent short breaks are added to the day Breathe deeply Breathe fresh air deeply and regularly The intense mental concentration that may accompany computer use may tend to cause breath holding or shallow breathing Safety and Comfort 21 Monitoring Your Health Habits and Exercise The comfort and safety of working at your computer can be affected by your general state of health Studies have shown that a
14. and shoulder to move the mouse not just your wrist Don t rest or anchor your wrist while using your pointing device keep your wrist arm and shoulder free to move Adjusting software controls You can use the software control panel to adjust the properties of your pointing device For example to reduce or eliminate mouse lifting try increasing the acceleration setting If you use a pointing device with your left hand the software control panel will allow you to switch the button assignments for maximum comfort Clean frequently Dirt can make pointing more difficult Remember to clean your mouse or trackball frequenty RIGHT Y l Keep your wrist in a straight neutral position when using your pointng device WRONG Don t angle your wrist when using your pointing device Safety and Comfort 19 Using a Keyboard on a AVOID HINT Pointing Comfort When using a mouse or trackball hold it loosely Keep your hand relaxed and click the buttons using a light touch When you are not using your pointing device don t hold onto it let it go Switch Hands To give your hand a break you may choose to control your mouse or trackball with the opposite hand for a while Avoid gripping or pinching your mouse tightly Even if you use your keyboard in a seemingly comfortable place such as a sofa bed or your favorite lounge chair you can still cause discomfort by sitting in an awkward Sofa position or i
15. area or posture listen to your body Its signals of comfort or discomfort will help you know whether your adjustments are right 26 Safety and Comfort Electrical and Mechanical Safety Information Introduction Product Safety Policy and General Practice Safety Standards Compaq products are designed to operate safely when installed and used according to 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 By carefully following the information contained in this section you can protect yourself from hazards and create a safer computer work environment This section provides information on the following topics Product safety policy Product installation requirements General safety precautions for all Compaq products If you have a serious concern regarding the safe use of the equipment that your Compaq authorized service provider cannot address call Compaq Customer Support for your area Compaq products are designed and tested to meet IEC 950 the Standard for the Safety of Information Technology Equipment This is the International Electrotechnical Commission s safety standard covering the type of equipment that Compaq manufactures Testing may include evaluation according to other criteria such as many of the international national and regional standards ba
16. as a bookcase or rack unless the apparatus has been specifically designed to accommodate the product proper ventilation is provided for the product and the manufacturer s instructions have been followed Water and moisture Do not use the product in a wet location Grounded earthed products Some products are equipped with a three wire electrical grounding type plug that has a third pin for grounding This plug only fits into a grounded electrical outlet This is a safety feature Do not defeat the safety purpose of the grounding type plug by trying to insert it into a non grounded outlet If you cannot insert the plug into the outlet contact your electrician to replace the obsolete outlet Safety and Comfort 29 Power sources The product should be operated only from the type of power source indicated on the product s electrical ratings label If you have questions about the type of power source to use contact your Compaq authorized service provider or local power company For a product that operates from battery power or other power sources refer to the operating instructions included with the product Accessibility Be sure that the power outlet you plug the power cord into is easily accessible and located as close to the equipment operator as possible When you need to disconnect power to the equipment be sure to unplug the power cord from the electrical outlet Voltage select switch Ensure that the voltage select s
17. as any feeling of discomfort Also be sure to adhere to the key principles presented earlier in this section The following strategies are intended to help you maintain comfort when using a notebook computer On the road i Ina hotel use a blanket for padding your chair and a rolled towel as an inventive way to support your lower back area Seeking comfort When working with a notebook computer keep TE your shoulders and neck relaxed and your head balanced over your shoulders You may find it comfortable to periodically use a support surface your briefcase a bed table firm blanket pillow or large book between your lap and your notebook computer Being inventive Use pillows blankets towels and books to Raise the height of your seat Create a footrest if needed Support your back Raise your computer to elevate the keyboard and display Provide arm supports if you are working on a couch or bed 9999 Provide padding wherever needed Transporting the computer If you load up your carrying case with accessories and papers avoid shoulder strain by using a cart or a carrying case with built in wheels HINT Notebook Comfort When you must work where proper seating or support may not be available such as on airplanes or in wilderness areas change your position often while working and take brief breaks more frequently Safety and Comfort Typing Style HINT Long Hours of Use You may find it
18. dential structures that have electrical installation in compliance with the Canadian Standards Association CAN CSA C22 1 Canadian Electrical Code Inall other countries operate the product in commercial or residential structures that have electrical installation in compliance with local and regional office and residential electrical wiring codes such as International Electrotechnical Commission IEC 364 parts 1 through 7 NOTE Do not use Compaq products in areas classified as hazardous locations Such areas include patient care areas of medical and dental facilities oxygen laden environments or industrial facilities Contact your local electrical authority governing building construction maintenance or safety for more information regarding the installation of any product For more information please consult the information manuals and literature provided with your product or contact your local sales representative Retain the product s safety and operating instructions for future reference Follow all operating and usage instructions Observe all warnings on the product and in the operating instructions To reduce the risk of fire bodily injury and damage to the equipment observe the following precautions Damage requiring service Unplug the product from the electrical outlet and take the product to a Compaq authorized service provider under the following conditions The power cord extension cord or plug is damaged Liqu
19. e your company s health and safety department The earlier a problem is properly diagnosed and treated the less chance there is that it will progress to a disabling condition The following pages describe proper workstation setup posture and health and work habits for computer users In addition this Guide contains product safety information applicable to all Compaq products Safety and Comfort Promoting a Safe and Comfortable Work Environment Posture lighting furniture work organization and other work conditions and habits may affect the way you feel and how well you work By adjusting your work environment and personal practices you may be able to minimize fatigue and discomfort and reduce the risk of resulting strains that some scientists believe can lead to injury Important If you share a computer with others readjust the work environment to your needs Choices Each time you sit down to work adjust into your comfort zone Whenever you use a computer you make choices that can affect your comfort and potentially your safety This is true whether you use a full size keyboard and monitor on a desk a notebook computer or a wireless keyboard on your lap In every case you choose your working posture and your body s position relative to your keyboard pointing device monitor remote control phone and any reference books and papers You may also have some control over lighting and other factors Take Action for Many
20. e chair frequently If you get a new adjustable chair or if you share a chair with someone else don t assume the settings are properly set for you Safety and Comfort Forearms Keep your forearms wrists and hands aligned in a straight neutral position whether Wrists and you are working at a desk or table or sitting on a couch or bed Avoid bending or Hands angling your wrists while typing or using a pointing device Don t anchor your wrists When typing do not anchor or rest your wrists on your work surface your thighs or a palm rest sometimes called a wrist rest Resting your palms while typing may be harmful because it can cause you to bend your wrists back and can apply pressure to the undersides of your wrists A palm rest is designed to provide support during pauses when you are not typing RIGHT Hold a straight neutral wrist position while typing WRONG Don t rest your palms on a work surface while typing RIGHT Hold a straight neutral wrist position while typing WRONG Don t angle your wrists this may cause unnecessary strain 8 Safety and Comfort AVOID Shoulders and Elbows Eyes HINT Split Keyboards If you find it difficult to type with a straight neutral wrist position you may want to try a split keyboard Be aware however that improper setup or posture while using a split keyboard can increase bending in your wrists So if you try one set it up properly to align your fo
21. ea Network ODLOnS s Pasos nage gate hb dunn set o str o fh tese ov ates speed 1 37 Precautions for Products with Laser Devices sees 1 37 For More Informations uy er ERREEKRRREERREERREEREREREEFER 1 39 Contents Safety and Comfort A WARNING There may be a risk of serious physical injuries from working at your computer workstation Read and follow the recommendations in this section to minimize the risk of injury and to increase your comfort Some studies have suggested that long periods of typing improper workstation setup incorrect work habits stressful work conditions and relationships or problems in your personal health may be linked to injuries These injuries could include carpal tunnel syndrome tendinitis tenosynovitis and other musculoskeletal disorders The warning signs of these disorders can occur in the hands wrists arms shoulders neck or back and can include Numbness burning or tingling Soreness aching or tenderness Pain throbbing or swelling Tightness or stiffness 99 99 Weakness or coldness Symptoms may be felt during typing while using a mouse or at other times when no work with the hands is being performed including during the night when these symptoms might awaken you If you experience these symptoms or any other persistent or recurring pain or discomfort that you think may be related to using a computer you should promptly consult a qualified physician and if availabl
22. ential safety risks use this checklist to help you evaluate your work posture and habits 9 9 9 9 o 99 Have you found a range of seated postures that are most comfortable for you Are you changing postures within your comfort zone throughout the day especially in the afternoon Are your feet firmly planted Are the undersides of your thighs near your knees free of pressure Are the backs of your lower legs free of pressure Is there sufficient space under your work surface for your knees and legs Is your lower back supported Are your shoulders relaxed Are your hands wrists and forearms aligned in a straight neutral position If you use arm supports are they adjusted so that your shoulders are relaxed and your wrists are straight Are your elbows in a relaxed position near your body Do you avoid resting your hands and wrists while typing or pointing Do you avoid resting your hands and wrists on sharp edges Do you avoid cradling the phone between your ear and shoulder Are items you use frequently such as your phone and reference materials easy to reach Do you rest your eyes frequently by focusing on a distant point Do you get your eyes examined regularly by a vision care specialist Do you blink enough If you wear bifocals or trifocals do you avoid tilting your head back to see the monitor 24 Safety and Comfort Typing Style Keyboard and Po
23. ents avoid placing your monitor to the side Safety and Comfort 11 Adjusting monitor height for bifocal and trifocal users If you wear bifocals or trifocals it s especially important to properly adjust your monitor height Avoid tilting your head back to view the screen through the lower portion of your glasses this could lead to muscle fatigue in your neck and back Instead try lowering your monitor You may want to consider using monofocal glasses that are specially made for computer use xx WRONG If you wear bifocals or trifocals don t position your monitor so high that you have to tilt your head back to view the L screen HINT Notebook Viewing Whenever using a notebook computer for long periods you may find it more comfortable to connect a full Size monitor A separate monitor gives you a wider range of viewing distance and height options HINT Adjusting Brightness and Contrast Reduce the potential for eye discomfort by using brightness and contrast controls on your monitor to improve the quality of text and graphics Eliminating glare and reflections on your monitor Take the time to eliminate glare and reflections To control daylight use blinds shades or drapes or try other glare reducing measures Use indirect or reduced lighting to avoid bright spots on your display screen If glare is a problem consider these actions Move your monitor to a place where glare and bright reflection
24. es To prevent access to areas containing hazardous energy levels some servers are provided with enclosures and safety interlocks Many Compaq servers are interlocked so that the power supply is disabled when the enclosure cover is removed For servers provided with safety interlocks observe the following precautions Do not remove enclosure covers or attempt to defeat the safety interlocks Do not repair accessories and options inside enclosed or interlocked areas of the system Repair should be performed only by individuals who are qualified in servicing computer equipment and trained to deal with products capable of producing hazardous energy levels 32 Safety and Comfort 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 Hot pluggable power supplies Observe the following guidelines when connecting and disconnecting power to the power supplies Install the power supply before connecting the power cord to the power supply Unplug the power cord before removing the power supply from the server Ifthe system has multiple sources of power
25. factors in our work environment determine whether we work efficiently and in Safety and a manner that promotes good health and safety Comfort By considering acting on and periodically reevaluating the recommendations in this Section it is possible to create a safer more comfortable healthful and efficient work environment Ly NOTE Some scientists believe that working intensely or for a long time in uncomfortable or unnatural positions may pose risks such as those mentioned in the warning The information included in this Section is designed to help you work more safely by recommending ways to work more comfortably and effectively s Y HINT SELF CHECK After reviewing the information in this chapter double check your postures and habits using the section Self Check on page 24 2 Safety and Comfort Key Principles To promote safety and comfort follow these principles whenever you use your computer Adjust Adjust your body position and your work equipment There is no one right position Find your comfort Zone as described in this Section and when working at your computer frequently adjust within this zone Move Vary your tasks so that you can move around avoid sitting in one posture all day Perform tasks that require walking Relax Build positive relationships at work and home Relax and strive to reduce sources of stress Stay aware of physical tension such as clenching your muscles and
26. height of your keyboard s home row see illustration under Shoulders and Elbows on page 9 Adjust your keyboard slope so that your wrists are straight Aligning the mouse and keyboard When using a mouse or detached trackball position the device immediately to the right or left of your keyboard Using a keyboard tray comfortably If you use a keyboard tray make sure it is wide enough to accommodate your pointing device such as a mouse or trackball Otherwise you will probably place the mouse on your desktop higher and farther away than the keyboard This will lead you to stretch forward repeatedly and uncomfortably to reach the mouse Safety and Comfort RIGHT Position your pointing device immediately to the right or left of your keyboard WRONG Don t position your keyboard and pointing device at different levels and distances Arm Supports You may find that supports for your forearms or hands allow you to be more relaxed and and a Palm Rest comfortable Using arm supports Some chairs and desks provide padded areas for resting your arms You may find it comfortable to rest the middle of your forearms on these supports while typing pointing or pausing Arm supports are properly adjusted when your shoulders are in a comfortable position and your wrists are straight Using a palm rest A palm rest is designed to provide support during pauses not during typing or pointing While typing or using a po
27. id has been spilled or an object has fallen into the product The product has been exposed to water 9 99 The product has been dropped or damaged in any way 28 Safety and Comfort There are noticeable signs of overheating The product does not operate normally when you follow the operating instructions Servicing Except as explained elsewhere in the Compaq documentation do not service any Compaq product yourself Opening or removing covers that are marked may expose you to electric shock Service needed on components inside these compartments should be done by a Compaq authorized service provider 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 the manufacturer or sold with the product Any mounting of the product should follow the manufacturer s instructions and should use a mounting accessory recommended by the manufacturer 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 openings should never be blocked by placing the product on a bed sofa carpet or other similar flexible surface The product should not be placed in a built in apparatus such
28. inting Device Monitor Are you training yourself to lighten up when you find you are pounding on the keys If you are not a touch typist have you been taking typing lessons Are you training your fingers to relax when they become tense Do you use your whole arm to reach for keys not located near the home row Is your keyboard positioned directly in front of you Are your keyboard height and slope adjusted so that your wrists are straight and your shoulders relaxed If you are typing with the keyboard on your lap are your shoulders relaxed and your wrists straight If you are using a mouse or detached trackball is it placed to the immediate right or left of your keyboard If you are using a mouse or trackball are you holding it loosely with a relaxed hand Do you let go of your pointing device when you are not using it Are you using a light touch when you click the buttons on your pointing device mouse trackball touchpad or pointing stick Are you cleaning your mouse or trackball frequently Is your monitor positioned in front of you and at a comfortable viewing distance about arm s length Or if you look at a paper document more than your monitor is your document holder in front of you with your monitor to one side Are the text and images on your monitor easily visible in a comfortably seated position Have you eliminated glare and bright reflections on your monitor without compromising your posture
29. inting device keep wrists free to move not anchored or resting on a palm rest the desk or your thighs RIGHT You may find that arm supports help you relax your shoulders and keep your wrists free to move while typing 14 Safety and Comfort AVOID Papers and Books HINT For Pauses Only Palm rests should only be used during pauses when you are not typing or using your pointing device Armrests should not cause you to Shrug or drop your shoulders Put excessive pressure on your elbows Wing your arms extend elbows out to the sides Select a work surface or surfaces that are large enough to hold the computer equipment and any additional items required for your work To help minimize eye fatigue position any materials to which you frequently refer at about the same viewing distance Minimizing your reach Arrange your frequently used papers books or other items to minimize the distance you reach for them If you frequently refer to books papers and writing materials and if you use a keyboard tray make sure the tray when extended doesn t cause you to lean forward or reach excessively This can stress your shoulders and back If you find that such stress occurs you may want to consider a different type of work setup Using a document holder If you use a document holder position it near the monitor at the same distance height and angle as the monitor Positioning the holder in this way
30. more comfortable to use a full size keyboard monitor and detached mouse or trackball with your notebook computer This is especially important when working on your notebook computer for long hours Observe your typing style and notice how you use your fingers and hands Avoid keeping any unnecessary tension in your thumbs and fingers Observe whether you have a heavy touch or a light touch while typing Use the minimum amount of force needed to depress the keys Reaching for keys and key combinations To reach keys that are not near your keyboard s home row move your whole arm avoid stretching your fingers and angling your wrists When pressing two keys simultaneously such as Ctrl C or Alt F use two hands instead of contorting one hand to reach both keys RIGHT Relax your thumbs and fingers while typing and pointing notice and release excess tension WRONG Don t type or point with unnecessary tension in your thumbs and fingers s Y HINT Keep it Light If your typing is on the heavy side teach yourself to lighten up Press the keys more gently 18 Safety and Comfort s Y HINT Hunt and Peck Typing Non touch typing causes the neck to bend forward repeatedly To minimize this repetitive movement learn how to touch type so you don t need to look down at the keyboard as often AVOID Avoid banging on the keys Don t use more force than needed to press the keys Pointing Style Use your whole arm
31. mputer from the ground up If you have a fixed desk or table systematically adjust yourself and your computer from the top down 1 2 3 4 5 e Seat height you should be able to plant your feet firmly on the floor Chair back angles and lower back support your back should be well supported Keyboard height home row should be near your elbow height Keyboard slope wrists should be straight Pointing device should be placed to the immediate left or right of your keyboard Optional forearm supports shoulder should not be elevated or dropped Monitor distance height and angle should allow your head to be balanced comfortably over your shoulders Document holder phone and reference materials frequently used items should be within easy reach Seat height elbow height should be near your keyboard s home row Footrest if you need one Follow steps 2 through 8 above HINT Be Inventive Adjustable furniture designed for computer use may not always be available However you can use towels pillows blankets and books in many ways such as to 99 9 99 Raise the height of your chair Create a footrest Support your back Elevate the keyboard or display Provide arm supports if you are working on a sofa or bed Provide padding wherever needed Safety and Comfort 23 Self Check Seated Position Shoulders Arms Wrists and Hands Eyes To increase your comfort and reduce pot
32. n one position for long periods Remember to frequently make changes to your position within your comfort zone and to take short breaks Aligning forearms wrists and hands When working on a keyboard on your lap keep your forearms wrists and hands comfortably aligned with each other in a straight neutral line Avoid bending or angling your wrists If your keyboard has palm rests use them during pauses not while typing or using a pointing device RIGHT Experiment with positioning pillows under your forearms they may help keep your shoulders relaxed and your wrists straight x s Y HINT Even on a sofa Remember to properly support your lower back AVOID Avoid slouching Be sure not to recline too much this may fatigue your neck and upper back Don t bend or angle your wrists Avoid sitting completely still and working without breaks for long periods 20 Safety and Comfort Taking Breaks As noted earlier in this section your furniture placement office equipment and lighting and Varying are only a few of the factors that determine comfort Your work habits are also very Your Tasks important Remember the following Take breaks When you work at your computer for long periods take short breaks at least once per hour and preferably more often You may find that frequent short breaks will benefit you more than fewer longer breaks If you find that you forget to take breaks use a timer or specialized software Sever
33. nd Varying Your Tasks 1 21 Monitoring Your Health Habits and Exercis 0 00 c cece eee eee ees 1 22 Organizing Your Adjustments c0cccccecceeeeesceeeeeeesseeeeeeeeesuuees 1 23 From the Ground Up iiis Ime 1 23 Fromthe Top DOWN hice em Mess Va eng Varus etae at ae ete 1 23 Contents Seated Position sos orsi s erga eben Pede Eds 1 24 Shoulders Arms Wrists and HandS cece cece cece n 1 24 EY OS ce AEA E S Aie tan eam A thee heen tahoe mti omen intent Re 1 24 Typing Style osseous eee ao tw orrot r o o r o or oie eii 1 25 Keyboard and Pointing Device 0 cette eens 1 25 MOFIILOE 3 sects eee ee d d etes steterit odds d sd 1 25 Notebook Computing 2 1e so e tte ee t i ae 1 26 General Prevention 2 20 12 d br ERE She Ae ae 1 26 Electrical and Mechanical Safety Information s nnn n nn nn nn 1 27 producion eruen MT 1 27 Product Safety Policy and General Practice aaa 1 27 Safety Standard Ss zx RR ER EN RU EE EREA RD RR Rae ede 1 27 Installation Requirements e 1 28 General Precautions for Compaq Products 0 00 cece eee eect eens 1 28 Precautions for Portable Computer Products 0 0 cece eee cece ee 1 32 Precautions for Server and Network Products 1 32 Precautions for Products with External Television Antenna Connectors 1 34 Antenna Grounding s ett bate bie IMP LERINR LII akg Mate 1 36 Precautions for Products with Modems Telecommunications or Local Ar
34. niture offers a wide range of adjustments you might find it comfortable to switch back and forth between sitting and standing positions Safety and Comfort Different Tasks Different Postures Organizing Your Adjustments AVOID Your choice of posture within your comfort zone may vary with your task For example you may find a reclined posture most comfortable for computer tasks and a more upright posture more comfortable for tasks requiring frequent reference to papers or books The order in which you make various adjustments to your body position and work area may vary depending on the adjustability of your furniture For tips on how to order your adjustments see the section Arranging Your Work Area on page 10 HINT THAT AFTERNOON SLUMP Pay particular attention to adjusting your posture in the afternoon when you may tend to get fatigued HINT EVERYTHING IS CONNECTED When you reposition any one part of your body you may need to adjust other parts as well Don t sit in one fixed posture all day Avoid slouching forward Besure not to lean back too far Safety and Comfort Feet Knees and Make sure your feet can rest solidly and comfortably on the floor while sitting Use Legs AVOID an adjustable work surface and chair that allow your feet to rest firmly on the floor or use a footrest If you use a footrest be sure it is wide enough to accommodate different leg positions within your c
35. omfort zone Providing enough leg room Be sure you have sufficient space under your work surface for your knees and legs Avoid concentrated pressure points along the underside of your thigh near the knee and the back side of your lower leg Stretch your legs and vary your leg posture throughout the day RIGHT SS A Rest your feet firmly on the floor or a footrest WRONG Don t dangle your feet and compress your thighs HINT WALK Get up from your desk frequently and take brief walks HINT LEG COMFORT Vary your leg positions throughout the day Avoid placing boxes or other items under your desk that limit your leg room You should be able to pull yourself all the way up to your desk without interference Safety and Comfort Back AVOID Use your chair to fully support your body Distribute your weight evenly and use the entire seat and backrest to support your body If your chair has adjustable low back support match the contours of the chair s backrest to the natural curve of your lower spine Getting comfortable Always make sure your lower back is well supported Make sure it feels comfortable in the position in which you are working RIGHT Distribute your weight evenly and use the entire seat and f backrest to support your body WRONG Don t slouch forward HINT ADJ UST OFTEN If your chair is adjustable experiment with the adjustments to find numerous comfortable positions then adjust th
36. our monitor Adjusting the monitor height Your monitor position should allow your head to be balanced comfortably over your shoulders It should not cause your neck to bend forward uncomfortably or backward to any degree You may find it more comfortable to position the monitor so that the top line of text is just below your eye height Your eyes should look slightly downward when viewing the middle of the screen Many computer designs allow you to place the monitor on top of the system unit If this places the monitor too high you may want to move the monitor to the desktop On the other hand if the monitor sits on your work surface and you feel any discomfort in your neck or upper back the monitor may be too low In that case try using a thick book or a monitor stand to raise the monitor Tilting the monitor Tilt the monitor so that it faces your eyes In general the monitor screen and your face should be parallel to each other To check for correct monitor tilt have someone hold a small mirror in the center of the viewing area When sitting in your normal work posture you should be able to see your eyes in the mirror HINT Eye Height Your eye height will change considerably whether you use a reclining or upright posture or some posture in between Remember to adjust your monitor s height and tilt each time your eye height changes as you move through your comfort zone If you look at the monitor more than you look at paper docum
37. rearms wrists and hands Be sure not to rest your wrists on sharp edges Adjust your chair height or keyboard height so that your shoulders are relaxed and your elbows hang comfortably at your sides Adjust your keyboard slope so that your wrists are straight Checking elbow height Position your elbows in a zone that is near the height of your keyboard s home row the row that includes the letters G and H This position allows you to relax your shoulders If you have long upper arms you may find you need to position your elbows a bit below the height of home row in order to provide enough space under the work surface for your knees and legs RIGHT Turn your chair to the side to help determine if your elbow height is near the height of your keyboard s home row HINT RELAX Remember to relax particularly in areas where muscle tension often builds such as your shoulders Working at your computer for long periods can be a visually demanding task and may cause your eyes to become irritated and fatigued Therefore you should give special attention to vision care including the following recommendations Resting your eyes Give your eyes frequent breaks Periodically look away from the monitor and focus at a distant point This may also be a good time to stretch breathe deeply and relax Safety and Comfort Cleaning your monitor and eyeglasses Keep your display screen and your eyeglasses or contact lenses clean If yo
38. s are eliminated Turn off or reduce ceiling lights and use task lighting one or more adjustable lamps to illuminate your work Ifyou cannot control the ceiling lights try positioning your monitor between rows of lights instead of directly beneath a row of lights Attach a glare reduction filter to your monitor 12 Safety and Comfort AVOID Keyboard and Pointing Device Place a visor on your monitor This device may be as simple as a piece of cardboard extending out over the monitor s top front edge Avoid tilting or swiveling your display in a way that leads to an uncomfortable head or upper back posture HINT Eliminating Glare Try positioning your monitor so that its side faces the windows Avoid compromising your posture to compensate for glare or reflections Try to avoid bright light sources in your field of vision For example don t face an uncovered window during daylight hours Place your keyboard mouse and other input devices so that you can use them with your body in a relaxed comfortable position In this way you don t have to reach or shrug your shoulders while working Positioning the keyboard Position the keyboard directly in front of you to avoid twisting your neck and torso This makes it possible to type with your shoulders relaxed and your upper arms hanging freely at your sides Adjusting the keyboard height and slope Your elbow height should be near the
39. sed on deviations to IEC 950 The IEC 950 standards provide general safety design requirements that reduce the risk of personal injury to both the computer user and the service provider These standards protect against the following hazards Electricshock Hazardous voltage levels contained in parts of the product Fire Overloads temperature material flammability Mechanical Sharp edges moving parts instability Energy Circuits with high energy levels 240 volt amperes or potential as burn hazards Heat Accessible parts of the product at high temperatures Chemical Chemical fumes and vapors Radiation Noise ionizing laser ultrasonic wave Safety and Comfort 27 Installation Requirements g General Precautions for Compaq Products Compaq products operate safely when used according to their marked electrical ratings and product usage instructions Use facilities that comply with the following electrical codes to ensure the safe operation of Compaq products Inthe United States operate the product in commercial or residential structures that have electrical installation in compliance with American National Standards Institute National Fire Protection Association ANSI NFPA 70 United States National Electric Code or ANSI NFPA 75 Protection of Electronic Computer Data Processing Equipment with branch circuit current protection of up to 20 amperes In Canada operate the product in commercial or resi
40. shrugging your shoulders Continually release tension Take frequent short breaks Listen Listen to your body Pay attention to any tension discomfort or pain you may feel and take immediate action to relieve it Safety and Comfort 3 Remember Remember to exercise regularly and maintain general fitness Doing this will help your body withstand the rigors of sedentary work Respect any medical conditions you may have or other health factors you may know of Adjust your work habits accordingly Finding Your Comfort Zone A Range of Positions Rather than working in a single posture find your comfort zone Your comfort zone is a range of positions that is generally appropriate and comfortable for your given work situation Vary Your Posture Depending on your tasks you may find a range of seated and standing postures that are comfortable Within your comfort zone change postures often throughout the day Move Sitting still for long periods can cause discomfort and muscle fatigue Changing postures is good for many parts of your body including your spine joints muscles and circulatory system Within your comfort zone change postures often throughout the day Take frequent short breaks stand up carefully stretch or walk around Frequently switch to brief tasks that require getting up such as retrieving output from a printer filing paperwork or consulting a colleague down the hall If your fur
41. u use a glare reduction filter clean it according to the manufacturer s directions Having your eyes examined To be sure that your vision is adequately corrected have your eyes examined regularly by a vision care specialist Consider having glasses made that are specifically suited for working with a computer monitor If you wear bifocals or trifocals you may find these special monofocal glasses more comfortable for computer use For more information see Adjusting monitor height for bifocal and trifocal users on page 12 Cd Y HINT Eye Comfort While looking at your monitor and also while resting your eyes remember to blink This helps keep your eyes naturally protected and lubricated and helps prevent dryness a common source of discomfort HINT Eye Break Give your eyes frequent rests by focusing them on a distant point Arranging Your Work Area You may find a range of monitor heights that allows your head to be balanced comfortably over your shoulders Monitor You will reduce eye strain and muscle fatigue in your neck shoulders and upper back by properly positioning your monitor and adjusting its angle 10 Safety and Comfort AVOID Positioning the monitor Place the monitor directly in front of you To determine a comfortable viewing distance stretch your arm toward the monitor and notice the location of your knuckles Place your monitor near that location You should be able to clearly see the text on y
42. ue to lightning and power line surges Power lines Do not place an outside antenna system in the vicinity of overhead power lines or other electric light or power circuits or where it can fall into power lines or circuits When installing an outside antenna system take extreme care to avoid touching power lines or circuits as contact with them could be fatal 34 Safety and Comfort In addition to the general precautions described earlier in this section 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 Do not connect or use a modem or telephone other than a cordless type during a lightning storm There may be a remote risk of electric shock from lightning Never connect or use a modem or telephone in a wet location Do not plug a modem or telephone cable into the Network Interface Card 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 Safety and Comfort 35 Antenna This reminder is provided to call the CATV cable television system installer s Grounding attention to Section 820 40 of the NEC National Electrical Code which provides
43. witch is in the correct position for the type of voltage you use 115 VAC or 230 VAC Internal battery Your computer may contain an internal battery powered real time clock circuit Do not attempt to recharge the battery disassemble it immerse it in water or dispose of it in fire Replacement should be done by a Compaq authorized service provider using the Compaq spare part for the computer Power cords If you have not been provided with a power cord for your computer or for any AC powered option intended for use with your computer you should purchase a power cord that is approved for use in your country The power cord must be 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 mm 18AWG and the cord should be between 5 and 6 5 feet 1 5 and 2 meters long If you have questions about the type of power cord to use contact your Compaq authorized service provider Route the power cord so that it will not be walked on tripped over or pinched by items placed upon or against it Pay particular attention to the plug electrical outlet and the point where the cord exits the product 30 Safety and Comfort Protective attachment plug In some countries the product cord set may be equipped with a
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