User manual

2
Operation Guide 3154
Illumination
An LED (light-emitting diode) and a light guide panel
illuminate the entire display for easy reading in the dark.
• See “Illumination Precautions” for more important
information.
To illuminate the display
In any mode, press L to illuminate the display.
• You can use the procedure below to select either one
second or three seconds as the illumination duration.
When you press L, the display will remain illuminated
for about one second or three seconds, depending on
the current illumination duration setting.
To specify the illumination duration
In the Timekeeping Mode, hold down C for about two seconds to toggle the
illumination duration between three seconds (
displayed) and one second ( not
displayed).
• Pressing C also toggles between 12-hour and 24-hour timekeeping.
• When the three-second setting is selected, the three-second (
) indicator remains
on the display in all modes.
• To protect against running down the watch’s battery, the watch automatically
switches to the one-second setting about seven hours after the three-second setting
is selected. To continue to use the three-second setting, perform the above
procedure again.
Dual Time
The Dual Time Mode lets you keep track of time in a different time zone.
• In the Dual Time Mode, the seconds count is synchronized with the seconds count
of the Timekeeping Mode time.
To set the Dual Time
1. Press B to enter the Dual Time Mode.
2. Hold down A until the hour setting starts to flash,
which indicates the setting screen.
3. Press B to move the flashing between the hour and
minutes settings.
4. Press C to increase the setting. Holding down C
changes the setting at high speed.
5. Press A to exit the setting screen.
Three-second indicator
Hour : Minutes Seconds
Timekeeping Mode tim
e
(Hour : Minutes)
Mode indicator
Reference
This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
Auto return features
If you leave a screen with flashing digits for one or two minutes without performing
any operation, the watch automatically saves any settings you have made up to that
point and exits the setting screen.
Illumination Precautions
• Illumination may be hard to see when viewed under direct sunlight.
• Illumination turns off automatically whenever an alarm sounds.
• Frequent use of illumination shortens the battery life.