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HP Pavilion xt500 HP Pavilion PC - Safety and Comfort Guide - Page 51

Precautions for Products with Hot-Pluggable Power Supplies

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Electrical and Mechanical Safety Information Precautions for Products with 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. ❒ If the system has multiple sources of power, disconnect power from the system by unplugging all power cords from the power supplies. Precautions for Products with External Television Antenna Connectors In addition to the general precautions described earlier in this chapter, 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. 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 an HP 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 Safety & Comfort Guide 7-9

Section	Page
© 2002 Hewlett-Packard Company	2
Warning	3
Contents	5
Promoting a Safe and Comfortable Work Environment	7
Important Choices	8
Take Action for Safety and Comfort	8
Students and Teachers	8
Finding Your Comfort Zone	11
A Range of Positions	12
Move	12
Different Tasks, Different Postures	12
Organizing Your Adjustments	12
Feet, Knees, and Legs	13
Providing Enough Leg Room	13
Back	14
Getting comfortable	14
Shoulders and Elbows	15
Forearms, Wrists, and Hands	16
Do Not Anchor Your Wrists	16
Eyes	18
Resting Your Eyes	18
Cleaning Your Monitor and Glasses	18
Having Your Eyes Examined	18
Arranging Your Work Area	19
Monitor	20
Positioning the Monitor	20
Adjusting the Monitor Height	20
Tilting the Monitor	20
Adjusting Monitor Height for Bifocal, Trifocal, and Progressive Addition Lens Users	21
Eliminating Glare and Reflections on Your Monitor	21
Keyboard and Pointing Device	22
Positioning the Keyboard	22
Adjusting the Keyboard Height and Slope	22
Aligning the Mouse and Keyboard	22
Using a Keyboard Tray Comfortably	23
Arm Supports and Palm Rest	24
Supporting Your Forearms	24
Using a Palm Rest	25
Papers and Books	26
Minimizing Your Reach	26
Using a Document Holder	26
Phone	27
Working in Comfort	29
Using a Notebook Computer	30
Seeking Comfort	30
Being Inventive	30
Transporting the Computer	30
Typing Style	31
Reaching for Keys and Key Combinations	31
Pointing Style	32
Adjusting Software Controls	32
Clean Frequently	32
Using a Keyboard on a Sofa or Bed	33
Be Aware of Your Forearms, Wrists, and Hands	33
Taking Breaks and Varying Your Tasks	34
Take Breaks	34
Vary Your Tasks	34
Reduce Sources of Stress	34
Breathe deeply	34
Monitoring Your Health Habits and Exercise	35
Monitoring Personal Tolerance Levels and Limits	35
Cultivating Health and Fitness	35
Organizing Your Adjustments	37
From the Ground Up	37
From the Top Down	37
Your Safety & Comfort Checklist	39
Seated Position	39
Shoulders, Arms, Wrists, and Hands	39
Eyes	40
Typing Style	40
Keyboard and Pointing Device	41
Monitor	41
Notebook Computer	42
General Prevention	42
Electrical and Mechanical Safety Information	43
Introduction	43
Product Safety Policy and General Practice	43
Safety Standards	44
Installation Requirements	44
General Precautions for HP Products	45
Damage Requiring Service	45
Servicing	45
Mounting Accessories	45
Ventilation	45
Water and Moisture	46
Grounded (Earthed) Products	46
Power Sources	46
Accessibility	46
Voltage Select Switch	46
Internal Battery	46
Power Cords	47
Protective Attachment Plug	47
Extension Cord	47
Overloading	47
Cleaning	47
Heat	48
Circulation and Cooling	48
Replacement Parts	48
Safety Check	48
Options and Upgrades	48
Hot Surfaces	48
Object Entry	48
Precautions for Portable Computer Products	48
Monitor Support Cover	49
Rechargeable Battery Pack	49
Docking Base	49
Precautions for Server and Network Products	49
Safety Interlocks and Enclosures	49
Accessories and Options	49
Products with Casters	50
Floor Standing Products	50
Rack-Mountable Products	50
Precautions for Products with Hot-Pluggable Power Supplies	51
Precautions for Products with External Television Antenna Connectors	51
Compatibility	51
External Television Antenna Grounding	51
Lightning Protection	51
Power Lines	52
Antenna Grounding	52
Precautions for Products with Modems, Telecommunications, or Local Area Network Options	53
Precautions for Products with Laser Devices	53
Laser Safety Warnings	53
Compliance with CDRH Regulations	54
Compliance with International Regulations	54
Laser Product Label	54
Symbols on Equipment	55
Appendix	57