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3 Working in Comfort
20 English
WARNING If your PC is multimedia or if you add a sound card to your PC, always turn the
volume down before connecting headphones or speakers, to avoid discomfort
from unexpected noise or static. Listening to loud sounds for prolonged
periods of time may permanently damage your hearing. Before putting on
headphones, place them around your neck and turn the volume down. When
you put on the headphones, slowly increase the volume until you find a
comfortable listening level. when you can hear comfortably and clearly,
without distortion, leave the volume control in that position.
Comfort and Safety
Checklist
These recommendations are drawn from the latest available international
ergonomic standards and recommendations, including ISO 9241 and
ANSI/HFS 100-1988.
General
• Work Surface Height - Adjust either your seat height, work surface or
both, to position the work surface at approximately elbow height.
• Work Surface Arrangement - Make sure frequently used equipment is
within easy reach. For example, if you are primarily using the keyboard,
place it directly in front of you, not to the side. If you are primarily using the
mouse, place it in front of your hand or arm. If you are using both a mouse
and keyboard, place them both at the same work surface height and close
together. If a palm rest is used, the height should be flush with the front
edge of the keyboard. Other items, such as your telephone or notepad, also
should be considered.
• Monitor - Place your monitor so that the top of the screen is at, or slightly
below, eye level (up to 15 degrees).
• Head - Do not tilt your head forward by more than 15 degrees, and try not
to turn your head toward the side.
Keyboard
Slope
Keyboard Height
64-76 cm
Document
Holder
Thigh
Clearance
≥
6cm
drac-usr.bk : wic-chap.fb4 Page 20 Friday, April 30, 1999 3:48 PM