MA0905-EC
Operation Guide 668 2168 2505
About This Manual
• Button operations are indicated using the letters
shown in the illustration.
General Guide
• Press B to change from mode to mode.
• Pressing B after performing some operations in any mode returns to the
Timekeeping Mode.
• If you do not perform any operation for a few minutes in the Alarm Mode or
Setting Screen, the watch automatically reverts to the Timekeeping Mode.
Timekeeping Mode
Alarm Mode
Stopwatch Mode
Setting Screen
Press B.
To turn the Daily Alarm and Hourly Time Signal on and off
Press C while in the Alarm Mode to change the status of the Daily Alarm and
Hourly Time Signal in the sequence shown below.
Timekeeping Mode
Minutes
In the Timekeeping Mode, press C to switch between
the 12-hour and 24-hour formats.
• When the 12-hour format is selected, the indicator PM
appears on the display to indicate “P.M.” times. There
is no indicator for “A.M.” times.
• When the 24-hour format is selected, the indicator
24H appears on the display.
Hour
Seconds
Both ON
Both OFF
Daily Alarm
Only
Hourly Time
Signal Only
• A charge indicator appears on the display of this
watch when charging is required.
• The alarm and hourly time signal indicator is displayed in all modes.
To test the alarm
Hold down C while in the Alarm Mode to sound the alarm.
Day
Day of week
Charge indicator
PM indicator
Stopwatch Mode
1/100 second
Seconds
Minutes
The Stopwatch Mode lets you measure elapsed time,
split times, and two finishes. The range of the
stopwatch is 59 minutes, 59.99 seconds.
Flashing
To set the time and date
1. Press B three times in the Timekeeping Mode to
display the setting screen.
2. Press A to move the selection (flashing) in the
following sequence.
Seconds
Hour
Day
Minutes
Month
Day of week
3. While the seconds setting is selected (flashing), press C to reset it to 00. If you
press C while the seconds setting is in the range of 30 to 59, the seconds are
reset to 00 and 1 is added to the minutes. If the seconds setting is in the range
of 00 to 29, the minutes count is unchanged.
4. While any other setting is selected (flashing), press C to increase the number.
• Holding down C changes the setting at high speed.
5. After you set the time and date, press B to return to the Timekeeping Mode.
Mode indicator
Elapsed time measurement
Stop
Split time measurement
Re-start
Stop
Stop
Clear
Clear
Start
Alarm Mode
Minutes
When the Daily Alarm is turned on, the alarm sounds for
20 seconds at the preset time each day. When the
Hourly Time Signal is turned on, the watch beeps every
hour on the hour.
Split
Split time and 1st-2nd place times
Split release
Start
Hour
To set the alarm time
Split
Stop
Second runner
finishes.
Split release
Display time of
second runner.
Clear
Start
1. Press A while in the Alarm Mode. The hour digits
flash because they are selected.
First runner
finishes.
• At this time the alarm is automatically turned on.
Display time of
first runner.
Mode indicator
Hourly time signal on indicator
Alarm on indicator
Power Requirements
This watch works by light energy, so no battery is necessary. Light energy is
converted into electric energy by solar cells and stored into the capacitor. Once
fully charged, the watch can continue to run for a number of days (Modules 668
and 2168: 4 days, Module 2505: 14 days) without being exposed to light.
2. Press A to change the selection in the following sequence.
Daily Alarm and
Hourly Time Signal
on and off
Hour
Minutes
I Charging light
• The watch will start to work within about two seconds after it is exposed to light
(such as general office illumination). Set the time and calendar at this time.
• You can put on the watch after the “charge indicator ( )” disappears from the
display.
3. Press C to increase the selected digits. Holding down C changes the number
at high speed.
• The format (12-hour and 24-hour) of the alarm time matches the format you
select for normal timekeeping.
• When setting the alarm time using the 12-hour format, take care to set the time
correctly as morning or afternoon.
• The beeper sound may be weak and the display may be dim while the charge
indicator is on the display.
• Use the information in the table below as a reference how long you need to
expose the watch to light when charging it.
To stop the alarm
• Press A to stop the alarm after it starts to sound.
1
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