HP Compaq Presario Manual

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191432-032
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Presario Notebook
Safety and Comfort Guide
Second Edition (February 2001)
Part Number 191432-032
Compaq Computer Corporation

Notice
© 2001 Compaq Computer Corporation
COMPAQ and the Compaq logo Registered in U.S. Patent and Trademark Office.
All other product names mentioned herein may be trademarks or registered trademarks of their
respective companies.
Compaq shall not be liable for technical or editorial errors or omissions contained herein.
The information in this document is subject to change without notice.
The information in this publication is subject to change without notice and is provided „AS IS“
WITHOUT WARRANTY OF ANY KIND. THE ENTIRE RISK ARISING OUT OF THE USE OF
THIS INFORMATION REMAINS WITH RECIPIENT. IN NO EVENT SHALL COMPAQ BE LIABLE
FOR ANY DIRECT, CONSEQUENTIAL, INCIDENTAL, SPECIAL, PUNITIVE OR OTHER
DAMAGES WHATSOEVER (INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF
BUSINESS PROFITS, BUSINESS INTERRUPTION OR LOSS OF BUSINESS INFORMATION),
EVEN IF COMPAQ HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. THE
FOREGOING SHALL APPLY REGARDLESS OF THE NEGLIGENCE OR OTHER FAULT OF
EITHER PARTY AND REGARDLESS OF WHETHER SUCH LIABILITY SOUNDS IN CONTRACT,
NEGLIGENCE, TORT, OR ANY OTHER THEORY OF LEGAL LIABILITY, AND
NOTWITHSTANDING ANY FAILURE OF ESSENTIAL PURPOSE OF ANY LIMITED REMEDY.
The limited warranties for Compaq products are exclusively set forth in the documentation accompanying
such products. Nothing herein should be construed as constituting a further or additional warranty.
Compaq Presario Notebook Safety and Comfort Guide
Second Edition (February 2001)
Part Number 191432-032

CONTENTS
i
Chapter1 SafetyandComfort .........................1-1
Promoting a Safe and Comfortable Work Environment . 1-2
ImportantChoices ..........................1-2
TakeActionforSafetyandComfort ............1-2
KeyPrinciples.................................1-3
Finding Your Comfort Zone ......................1-4
A Range of Positions ........................1-4
DifferentTasks,DifferentPostures .............1-5
OrganisingYourAdjustments .................1-5
Feet, Knees, and Legs ......................1-6
Back.....................................1-7
Forearms, Wrists, and Hands .................1-8
Shoulders and Elbows .......................1-9
Eyes.....................................1-9

ii
Arranging Your Work Area ......................1-10
Monitor..................................1-10
KeyboardandPointingDevice ...............1-13
Arm Supports and a Palm Rest ...............1-14
Papers and Books .........................1-15
Phone ..................................1-16
WorkinginComfort............................1-17
Using a Notebook Computer .................1-17
TypingStyle..............................1-18
PointingStyle.............................1-19
Using a Keyboard on a Sofa .................1-20
TakingBreaksandVaryingYourTasks ........1-21
MonitoringYourHealthHabitsandExercise.....1-22
OrganisingYourAdjustments....................1-23
From the Ground Up .......................1-23
FromtheTopDown........................1-23
Self-Check ..................................1-24
SeatedPosition ...........................1-24
Shoulders, Arms, Wrists, and Hands ...........1-24
Eyes....................................1-24
TypingStyle..............................1-25
KeyboardandPointingDevice ...............1-25
Monitor..................................1-25
Notebook Computing .......................1-26
General Prevention ........................1-26

iii
ElectricalandMechanicalSafetyInformation........1-27
Introduction . . ............................1-27
Product Safety Policy and General Practice .....1-27
Safety Standards ..........................1-27
Installation Requirements . . .................1-28
General Precautions for Compaq Products ......1-28
Precautions for Portable Computer Products ....1-32
Precautions for Server and Network Products ....1-32
Precautions for Products with External
Television Antenna Connectors ...............1-34
Antenna Grounding ........................1-35
Precautions for Products with Modems, Tele-
communications, or Local Area Network Options . 1-36
PrecautionsforProductswithLaserDevices ....1-36
ForMoreInformation..........................1-38
Chapter2 GovernmentApprovals......................2-1
European Union Notice .........................2-1
Federal Communications Commission Notice . .......2-2
Modifications ..............................2-2
Cables ...................................2-2
Declaration of Conformity for Products Marked
with the FCC Logo (United States Only) ............2-3
Canadian Notice ...........................2-3
Avis Canadien .............................2-3
Japanese Notice ...........................2-3
TelecommunicationsDeviceApprovals.............2-4

iv
U.S. Modem Regulatory Statements ...............2-4
ApplicablecertificationjackUSOC=RJ11C ......2-4
Canadian Modem Regulatory Statements ...........2-6
U.K.BABTUsersNotice.........................2-7
Telephone Network Connection ...............2-7
Auto Dialling with the Modem .................2-9
Benutzerhinweise für besondere Bestimmungen
inÖsterreich..................................2-9
HinweisfürdieBenutzunginÖsterreich .........2-9
Wahlsperre ...............................2-9
Benutzerhinweise für besondere Bestimmungen
inDeutschland................................2-9
Hinweis für die Benutzung in der Bundesrepublik
Deutschland...............................2-9
Brugerinstruktioner i overensstemmelse med
danske krav .................................2-10
Opkaldskoder P og T .......................2-10
Speciale gebruiksinstructies voor Nederland . . ......2-10
Aansluitfactor.............................2-10
Wachtenopkiestoon .......................2-10
Handenvrij bellen ..........................2-10
Användarinstruktioner i överensstämmelse med
svenskakrav.................................2-10
UppringningskodPochT.......................2-10
New Zealand Modem Regulatory Statements . ......2-11
Voice Support ............................2-12

v
Safety......................................2-12
Batteries ................................2-12
PowerCords .............................2-12
LaserAssemblies .........................2-13
CDRH Regulations ........................2-13
UsingtheComputer........................2-15
German Ergonomics Notice .................2-15
Mobile Products – German Ergonomics Notice . . . 2-15
Locating the Regulatory Compliance
MarkingsLabels...........................2-15
EnergyCompliance ........................2-18

vi

Safety and Comfort 1-1
Chapter 1 Safety and Comfort
Å
ÅÅ
ÅWARNING: Theremaybeariskofserious physical injuries from working at your computer
workstation. Read and follow the recommendations in this section to minimise the risk of injury and
to increase your comfort.
Some studies have suggested that long periods of typing, improper workstation setup,
incorrect work habits, or problems in your personal health may be linked to discom-
fort or serious injuries. These injuries could include carpal tunnel syndrome, tendini-
tis, tenosynovitis, and other musculo-skeletal 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
◆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 wake 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 available, 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.

1-2 Safety and Comfort
Promoting a Safe and Comfortable Work Environment
Posture, lighting, furniture, work organisation, 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 minimise fatigue and
discomfort, and reduce the risk of resulting strains that some scientists believe can
lead to injury.
Important
Choices
If you share a computer with others, adjust the working environment to suit your own
requirements. Each time you sit down to work, adjust the working environment for
your comfort.
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 cordless 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
Safety and
Comfort
Many factors in our work environment determine whether we work efficiently and in
a manner that promotes good health and safety.
By considering, acting on, and periodically re-evaluating the recommendations in this
Section, it is possible to create a safer, more comfortable, healthful, and efficient
work environment.
K
KK
KNOTE: 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.
J
JJ
JHINT: SELF-CHECK: After reviewing the information in this chapter, double-check your postures and
habits using the section Self-Check on page 24.

Safety and Comfort 1-3
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 the same position all day. Perform tasks that
require walking.
Relax
Build positive relationships at work and home. Relax
and strive to reduce sources of stress. Be aware of
physical tension such as clenching your muscles and
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.
Remember
Remember to exercise regularly and maintain general
fitness. Doing this will help your body withstand the
rigors of sedentary work. Respect any medical condi-
tions you may have or other health factors you may
know of. Adjust your work habits accordingly.

1-4 Safety and Comfort
Finding Your Comfort Zone
ARangeof
Positions
Rather than working in a single position, 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 position frequently throughout the
day.
Move
Sitting still for long periods can cause discomfort and muscle fatigue. Changing
posture is good for many parts of your body, including your spine, joints, muscles,
and circulatory system.
Within your comfort zone, change position frequently throughout the day. Take fre-
quent 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 furniture offers a wide range of adjustment, you might find it comfortable to
switch back and forth between sitting and standing positions.

Safety and Comfort 1-5
Different Tasks,
Different
Postures
Your choice of posture within your comfort zone may vary with your task. For exam-
ple, 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.
Organising Your
Adjustments
The order in which you make various adjustments to your body position and work
area may vary depending on the extent to which your furniture is adjustable.
For tips on how to order your adjustments see the section Arranging Your Work Area
on page 10.
J
JJ
JHINT:THATAFTERNOONSLUMP:Pay particular attention to adjusting your position in the afternoon
when you may tend to get tired.
HINT: EVERYTHING IS CONNECTED: When you reposition any one part of your body, you may need to
adjust other parts as well.
AVOID! ◆Don't sit in the same position all day.
◆Avoid slouching forward.
◆Be sure not to lean back too far.

1-6 Safety and Comfort
Feet, Knees, and
Legs
Make sure your feet can rest solidly and comfortably on the floor while sitting. Use
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 comfort 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!
Rest your feet firmly on the floor or a footrest.
WRONG!
Don’t dangle your feet and compress your thighs.
J
JJ
JHINT: WALK: Get up from your desk frequently and take brief walks.
HINT: LEG COMFORT: Vary your leg positions throughout the day.
AVOID! 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 1-7
Back 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
backrest to support your body.
WRONG!
Don’t slouch forward.
J
JJ
JHINT: ADJUST OFTEN: If your chair is adjustable, experiment with the adjustment to find numerous
comfortable positions, then adjust the chair frequently.
AVOID! If you get a new adjustable chair, or share a chair with someone else, don’t assume the settings are
correct for you.

1-8 Safety and Comfort
Forearms,
Wrists, and
Hands
Keep your forearms, wrists, and hands aligned in a straight, neutral position, whether
you are working at a desk or table, or sitting on a couch or bed. Avoid bending or
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.

Safety and Comfort 1-9
J
JJ
JHINT: 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 set-up 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 forearms, wrists, and hands.
AVOID! Be sure not to rest your wrists on sharp edges.
Shoulders and
Elbows
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 slightly below the height of the home row 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.
J
JJ
JHINT: RELAX: Remember to relax, particularly in areas where muscle tension often builds up, such as
your shoulders.
Eyes 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.

1-10 Safety and Comfort
Cleaning your monitor and eyeglasses
Keep your display screen and your eyeglasses or contact lenses clean. If you 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.
J
JJ
JHINT: 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 positioning your monitor and adjusting its angle correctly.

Safety and Comfort 1-11
Positioning the monitor
Place the monitor directly in front of you. To deter-
mine 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 see the text on your monitor
clearly.
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 centre of the viewing area. When sitting in your normal
work posture, you should be able to see your eyes in the mirror.
J
JJ
JHINT: Eye Height
Your eye height will change considerably, depending on 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.
AVOID! If you look at the monitor more than you look at paper documents, avoid placing your monitor to the
side.