Filter
Top Products
Operation Guide 2608 2638 2688
3
To recall Time Recorder times
In the Time Recorder Mode, use D (+) and B (–) to scroll through times stored in
memory.
• If you recorded a new Time Recorder time since you last entered the Time Recorder
Mode, the newest record appears first. If you have not recorded a new time, the
record you were viewing when you last exited the Time Recorder Mode appears
first.
To delete all Time Recorder times
In the Time Recorder Mode, hold down A to delete all Time Recorder times.
Alarms
The Alarm Mode gives you a choice of four one-time
alarms and one snooze alarm.
Also use the Alarm Mode to turn the Hourly Time Signal
(
SIG) on and off.
• There are five alarms numbered
AL1 through AL4,
and
SNZ. You can configure SNZ as a snooze alarm
only. Alarms
AL1 through AL4 can be used as one-
time alarms only.
• Alarm settings (and Hourly Time Signal settings) are
available in the Alarm Mode, which you enter by
pressing C.
To set an alarm time
1.In the Alarm Mode, use D to scroll through the alarm
screens until the one whose time you want to set is
displayed.
2.After you select an alarm, hold down A until the hour
setting of the alarm time starts to flash, which indicates
the setting screen.
• This operation automatically turns on the alarm.
3.Use C to move the flashing between the hour and
minute settings.
4.While a setting is flashing, use D (+) and B (–) to
change it.
5.Press A to exit the setting screen.
• When setting the alarm time using the 12-hour format,
take care to set the time correctly as a.m. (A indicator)
or p.m. (P indicator).
Alarm Operation
The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the
watch is in. In the case of the snooze alarm, the alarm operation is performed a total
of seven times, every five minutes, or until you turn the alarm off.
• Pressing any button stops the alarm tone operation.
• Performing any one of the following operations during a 5-minute interval between
snooze alarms cancels the current snooze alarm operation.
Displaying the Timekeeping Mode setting screen
Displaying the snooze alarm setting screen
To test the alarm
In the Alarm Mode, hold down B to sound the alarm.
To turn an alarm on and off
1.In the Alarm Mode, use D to select an alarm.
2.Press B to toggle it on and off.
• Turning on a one-time alarm (
AL1, AL2, AL3,
AL4) displays the alarm on indicator on its Alarm Mode
screen. Turning on the snooze alarm (
SNZ) displays
the alarm on indicator and snooze alarm indicator on its
Alarm Mode screen.
• In all modes, the alarm on indicator is shown for any
alarm that is currently turned on. When the snooze
alarm is on, the snooze alarm indicator is displayed in
all modes.
• The alarm on indicator flashes while the alarm is
sounding.
• The snooze alarm indicator flashes during the 5-minute
intervals between alarms.
To turn the Hourly Time Signal on and off
1.In the Alarm Mode, use D to select the Hourly Time
Signal (
SIG
).
2.Press B to toggle it on (Hourly Time Signal on
indicator displayed) and off (Hourly Time Signal on
indicator not displayed).
• The Hourly Time Signal on indicator is displayed in all
modes when the Hourly Time Signal is turned on.
Alarm time (Hour : Minutes)
Alarm number
Home city time
AL1 AL2 AL3
SIG SNZ AL4
Module 2688
Hourly time signal
on indicator
Module 2608
Module 2638
Module 2688
1/100 second
Hours
Home city time
Seconds
Minutes
D
Start Stop
Elapsed Time
➤
Re-start Clear
D
➤
Stop
D ➤
D
➤
B
Split Time
D
Start Split
➤
Split release
Clear
B
➤
Stop
B
➤
D
➤
B
Two Finishes
D
Start Split
➤
Stop
Clear
B
➤
Split release
D
➤
B
➤
B
First runner
finishes.
Display time of
first runner.
Second runner
finishes.
Display time of
second runner.
To measure times with the stopwatch
(SPL/
SPL
displayed)
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
in the dark.
• The auto light switch must be turned on (indicated by
the auto light switch on 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
one second.
• 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 one second,
whenever you position your wrist as described below in any mode. Note that this
watch features a “Full Auto EL Light,” so the auto light switch operates only when
available light is below a certain level. It does not turn on the backlight under bright
light.
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.
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 any mode, hold down L for about two seconds to toggle the auto light switch on
(auto light switch on indicator displayed) or off (auto light switch on indicator not
displayed).
• The auto light switch on indicator is on the display in all modes while the auto light
switch is turned on.
Battery
This watch is equipped with a solar cell and a rechargeable battery (secondary
battery) that is charged by the electrical power produced by the solar cell. The
illustration shown below shows how you should position the watch for charging.
Example: Orient the watch so its face
is pointing at a light source.
• Note that charging efficiency drops
when any part of the solar cell is
blocked by clothing, etc.
• The illustration shows how to position
a watch with a resin band.
Auto light switch on indicator
Module 2608
Module 2638
Module 2688
Solar cell
Stopwatch
The stopwatch lets you measure elapsed time, split times,
and two finishes.
• The display range of the stopwatch is 23 hours, 59
minutes, 59.99 seconds.
• The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
• Exiting the Stopwatch Mode while a split time is frozen
on the display clears the split time and returns to
elapsed time measurement.
• The stopwatch measurement operation continues even
if you exit the Stopwatch Mode.
• All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing C.
Alarm on indicator
Module 2638
Snooze on indicator
Module 2608
Alarm on indicator
More than
40
°
Parallel to
ground