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USER’S GUIDE 2430
2
Alarm on indicator
Hourly time signal
on indicator
Alarm Operation
The alarm tone sounds and an alarm graphic flashes at the preset time for about 20
seconds.
• Pressing any button stops the alarm operation.
To test the alarm
In the Alarm Mode, hold down C to sound the alarm.
To turn an alarm and the Hourly Time Signal on and off
1.In the Alarm Mode, use C to select an alarm or the
Hourly Time Signal.
2.When the alarm or the Hourly Time Signal you want is
selected, press A to turn it on (
displayed) and off
(
not displayed).
• The alarm on indicator and the Hourly Time Signal on
indicator are shown on the display in all modes while
these functions are turned on.
• If any alarm is on, the alarm on indicator is shown on
the display when you change to another mode.
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.
To set the Dual Time
1.Press B to enter the Dual Time Mode.
2.Use A and C to set the Dual Time Mode time.
• Each press of C changes the time setting in 30-minute
increments.
• Pressing A sets the Dual Time Mode to the same time
as the Timekeeping Mode.
Seconds
Mode
indicator
Hour : Minutes
Graphic
(seconds)
Backlight
The backlight uses an EL (electro-luminescent) panel that
causes the entire display to glow for easy reading in the
dark. The watch’s auto light switch automatically turns on
the backlight when you angle the watch towards your
face.
• The auto light switch must be turned on (indicated by
the auto light switch indicator) for it to operate.
• See “Backlight Precautions” for other important
information about using the backlight.
To turn on the backlight manually
In any mode, press L to illuminate the display for about
two seconds.
• The above operation turns on the backlight regardless
of the current auto light switch setting.
About the Auto Light Switch
Turning on the auto light switch causes the backlight to turn on for about two seconds,
whenever you position your wrist as described below in any mode.
• Be sure to wear the watch on the outside of your left wrist while using the auto light
switch.
Moving the watch to a position that is parallel to the ground and then tilting it
towards you more than 40 degrees causes the backlight to turn on.
Parallel to ground More than 40
°
Auto light switch indicator
Warning!
• Always make sure you are in a safe place whenever you are reading the
display of the watch using the auto light switch. Be especially careful when
running or engaged in any other activity that can result in accident or injury.
Also take care that sudden illumination by the auto light switch does not
surprise or distract others around you.
• When you are wearing the watch, make sure that its auto light switch is turned
off before riding on a bicycle or operating a motorcycle or any other motor
vehicle. Sudden and unintended operation of the auto light switch can create
a distraction, which can result in a traffic accident and serious personal injury.
To turn the auto light switch on and off
In the Timekeeping Mode, hold down L for about two seconds to toggle the auto light
switch on (Auto light switch indicator displayed) or off (Auto light switch indicator not
displayed).
• The auto light switch indicator is on the display in all modes while the auto light
switch is turned on.
• In order to protect against running down the battery, the auto light switch
automatically turns off approximately six hours after you turn it on. Repeat the above
procedure to turn the auto light switch back on if you want.
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 Display
Auto Display continually changes the contents of the
digital display.
To turn off Auto Display
Press any button (except for L) to turn off Auto Display.
This returns to the Timekeeping Mode.
To turn on Auto Display
Hold down B for about two seconds until the watch
beeps.
• Note that Auto Display cannot be performed while a
setting screen is on the display.
Auto return features
If you leave a screen with a flashing setting for two or three minutes without
performing any operation, the watch automatically saves any settings you have made
up to that point and exits the setting screen.
Data and Setting Scrolling
The C button is used in various setting screens to scroll through data on the display.
In most cases, holding down this button during a scroll operation scrolls through the
data at high speed.
Initial Screens
When you enter the Alarm Mode, the data you were viewing when you last exited the
mode appears first.
Backlight Precautions
• The electro-luminescent panel that provides illumination loses power after very long
use.
• The illumination provided by the backlight may be hard to see when viewed under
direct sunlight.
• The watch may emit an audible sound whenever the display is illuminated. This is
due to vibration of the EL panel used for illumination, and does not indicate
malfunction.
• The backlight automatically turns off whenever an alarm sounds.
• Frequent use of the backlight shortens the battery life.
Auto light switch precautions
• Avoid wearing the watch on the inside of your wrist.
Doing so causes the auto light switch to operate when it
is not needed, which shortens battery life. If you want to
wear the watch on the inside of your wrist, turn off the
auto light switch feature.
More than 15 degrees
too high
• The backlight may not light if the face of the watch is more than 15 degrees above
or below parallel. Make sure that the back of your hand is parallel to the ground.
• The backlight turns off in about two seconds, even if you keep the watch pointed
towards your face.
• Static electricity or magnetic force can interfere with proper operation of the auto
light switch. If the backlight does not light, try moving the watch back to the starting
position (parallel with the ground) and then tilt it back toward you again. If this does
not work, drop your arm all the way down so it hangs at your side, and then bring it
back up again.
• Under certain conditions, the backlight may not light until about one second after
you turn the face of the watch towards you. This does not necessarily indicate
malfunction of the backlight.