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Operation Guide 3731

1

MA0410-EA

The Power Saving feature of the watch is turned on at the factory.

Power Saving causes the watch to turn off the display automatically and enter a sleep state to save power whenever the watch is left in the
dark.

Note that the watch may also enter the sleep state if the watch is blocked from light by your sleeve.

Power Saving

Modes and Display Screens

Each press of the 

C

C

C

C

C

 button sounds a confirmation tone and cycles through available modes in the sequence shown below.

The watch will automatically revert to the Timekeeping Mode if you leave the Alarm (except for the target alarm remaining time
screen), Recall, or Hand Setting screen displayed without performing any operation for about two or three minutes.

Timekeeping Mode

Hand Setting Mode

PM indicator 
(no indicator for AM)

Receive Indicator

24-hour Dial

Minute 
Hand

Hour Hand

Second Hand

Battery Level 
Indicator

1/20 Second 
Stopwatch Time

(Screen Switching)

(Mode Switching)

Mode 
Indicator

Day of the Week

Month

Day

Year

Month

Day

Hour

Minutes

Seconds

(Light)

 Button

 Button

 Button

 Button

Changing Display Screen Contents

Each press of the 

 button cycles display contents in the 

sequence shown below.

Days of the Week

SUN: Sunday 

MON: Monday 

TUE: Tuesday

WED: Wednesday 

THU: Thursday 

FRI: Friday

SAT: Saturday

• 

For details about the battery level indicator, see “Battery 
Level Indicator”. For details about the receive indicator, see 
“Receive Indicator”. 

Stopwatch Mode

Recall Mode

Alarm Mode

Dual Time Mode

Elapsed Time

Hands move to 12 o’clock.

Moves to current level.

Returns to current seconds position.

Time in Current 
Time Zone

Time Zone

TIME
DIFFERENCE

Alarm Number

Alarm Time

How the sleep state works

Display sleep state

The display sleep state is triggered whenever the watch is left
in the dark for three or four days.

The display goes blank in the display sleep state.
Alarms and the hourly time signal continue to operate normally,
while the watch is in the display sleep state.
Even when the watch is in the sleep state, digital-analog time
synchronization and auto signal receive are both performed.

Function sleep state

The function sleep state is triggered whenever the watch is left
in the dark for four days.

Alarms and the hourly time signal are also disabled while the
watch is in the function sleep state.

In the function sleep state, analog timekeeping is disabled, so
digital-analog time synchronization is not performed.

Digital timekeeping functions continue to operate normally in
the function sleep state.

To recover from the sleep mode

Place the watch in an area that is well-lit, press any button, or
angle the watch towards your face to illuminate the display using
the Auto Light (“To illuminate the face with the auto light switch”).

It can take up to two seconds before the display re-appears after
you place the watch in a well-lit area.

To turn power saving on and off

See the procedure under “To configure Home Time Zone settings”
for information about turning off power saving.

Leaving the watch in a drawer or anywhere else it is dark can
cause the power saving mode to trigger in order to conserve
battery power.

The analog hands are not shown in the face illustrations shown in this User’s Guide.

Summary of Contents for 3731

Page 1: ...Hands move to 12 o clock Moves to current level Returns to current seconds position Time in Current Time Zone Time Zone TIME DIFFERENCE Alarm Number Alarm Time How the sleep state works Display sleep state The display sleep state is triggered whenever the watch is left in the dark for three or four days The display goes blank in the display sleep state Alarms and the hourly time signal continue to...

Page 2: ...the face of the watch Pressing the D button illuminates the face regardless of whether the auto light switch is on or off You can use the procedure under To specify the illumination duration to configure the illumination duration as approximately 1 5 seconds or 2 seconds You may hear a faint rattling sound when you move the watch around This sound is caused by the movement of a metal bulb that con...

Page 3: ...onfigured to select the strongest Japanese signal 40kHz Mt Otakadoya signal or 60kHz Mt Hagane signal and use that one for calibration is stronger 1000km Mt Hagane 60kHz Mt Otakadoya 40kHz 500km 1000km 500km Japan Transmitter Locations Under optimum conditions the calibration signal should be receivable up to 1 000 kilometers from the transmitter Note that the wave is relatively weak at distances ...

Page 4: ...s will cause the watch to beep and then exit the receive operation Make sure you are within the range of the calibration signal transmitter before performing the reception operation Remember that geographic contours nearby buildings seasonal conditions the time of day can even make reception impossible even when you are within range of the transmitter Proper reception may be impossible if there is...

Page 5: ...ute setting flashes Hour Forward Back Minute 5 Use the D D D D D and B B B B B buttons to change the minute setting Holding down either button scrolls the setting at high speed 6 When the setting is the way you want press the A A A A A button This exits the setting screen An alarm is turned on automatically whenever you change its settings The display also will exit the setting screen automaticall...

Page 6: ...ime Though the digital time freezes the stopwatch hands continue to move This stops the elapsed time operation Pressing the A button while timing is stopped resets the stopwatch Resetting the stopwatch stores the final elapsed time that is on the display to lap split time memory Start Lap Number Lap Lap Time Reset Stop Start Split Split Time Reset Stop Lap Time Display Split Time Display Elapsed T...

Page 7: ...ing the A button in the Dual Time Mode displays the time differential of the currently selected time zone for about one second Time Zone Time in selected time zone Forward Using Summer Time DST Summer time or Daylight Saving Time DST as it is called in some countries calls for setting clocks ahead one hour during the summer season Note that the use of summer time depends on the country and even th...

Page 8: ... D D D D D button to reset them to 00 in accordance with the time signal on the radio TV etc Pressing the D button while the seconds count is in the range of 30 to 59 resets it to 00 and also adds 1 to the minutes Pressing the D button in the range of 00 to 29 resets the seconds count without changing the minutes 9 While the hour minutes year month or day setting is flashing use the D D D D D butt...

Page 9: ...il it completes a 12 hour cycle or until you press any button to stop it 6 Press the A A A A A button to select the stopwatch 1 20 second hand for adjustment 24 hour hand Minute Hand Hour Hand Forward Back 7 If the 1 20 second hand is not aligned with the 12 o clock position use the D D D D D button to adjust it Each press of the D button advances the 1 20 second hand by one step Holding down the ...

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