Casio Watch MA0310 EA User Manual

MA0310-EA  
Operation Guide 2689  
Power Saving  
The Power Saving feature of the watch is turned on at the factory.  
Power Saving causes the watch to automatically 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.  
Digital timekeeping functions continue to operate normally in  
the function sleep state.  
How the sleep state works  
Display sleep state  
The display sleep state is triggered whenever the watch is left in  
the dark for about one hour between the hours of 10 p.m. and  
6 a.m.  
To recover from the sleep state  
Place the watch in an area that is well-lit, press any button, or  
angle the watch toward your face to illuminate the display using  
the Auto Light.  
The display goes blank, except for a sleep indicator flashing on  
it.  
It can take up to two seconds before the display re-appears after  
you place the watch in a well-lit area.  
Alarms and the hourly time signal continue to operate normally  
while the watch is in the display sleep state.  
The watch does not enter the sleep state if it is in the  
Stopwatch Mode.  
To turn power saving on or off  
Sleep indicator  
Use the procedure under “Setting the Time and Date Manually” to  
turn Power Saving on or off.  
Leaving the watch in a drawer or anywhere else it is dark can  
cause Power Saving to trigger in order to conserve battery  
power.  
Function sleep state  
The function sleep state is triggered whenever the watch is left in the  
dark for six or seven days.  
The sleep mark stops flashing and remains on the display.  
Alarms, the hourly time signal, and auto signal reception are  
also disabled while the watch is in the function sleep state.  
Modes and Display Screens  
The watch will automatically revert to the Timekeeping Mode if you leave it in the Alarm Mode or Recall Mode without performing  
any operation for about two or three minutes.  
Entering the Alarm Mode displays an alarm number, “SNZ” (snooze alarm), or “SIG” (hourly time signal).  
Timekeeping Mode  
Days of the Week  
World Time Mode  
Recall Mode  
SUN :Sunday  
MON:Monday  
TUE :Tuesday  
Segments indicate the passage  
of 5-minute intervals.  
WED:Wednesday THU :Thursday FRI :Friday  
SAT :Saturday  
Graphic Area  
Time Stamp (Time Memo)  
Battery Indicator  
Holding down the B button for about one second in  
the Timekeeping Mode creates a record containing  
the current date (month and day) and time (hour,  
minute, second) in memory. Storage of the record is  
indicated by the watch beeping.  
The display shows the contents of the record for about  
two seconds, after which the normal Timekeeping Mode  
display reappears.  
City Code  
Mode Indicator  
AButton  
PM indicator  
BButton  
(A for AM)  
Hour, minute,  
second  
DButton  
Stopwatch Mode  
Alarm Mode  
See for information about recalling Time Stamp records.  
CButton  
Month-day  
Day of the  
Week  
LButton  
(Light)  
Hour, minute,  
second  
Month-day  
Memo number  
Alarm Number  
Mode Indicator  
1
 
Operation Guide 2689  
Reception Range  
How a Radio-controlled Watch Works  
This watch is designed to receive the standard time calibration signal of Japan (JJY) or of the United States (WWVB). The signal that is  
received depends on the current Home City setting.  
For information about selecting a Home City, see “Setting the Time and Date Manually”.  
What is a radio-controlled watch?  
Calibration Signal  
Your radio-controlled watch is designed to receive a time  
calibration signal that contains standard time data and adjust its  
current time setting accordingly.  
Transmitter  
Home City  
TYO  
The Japanese calibration signal (Call Sign: JJY) is maintained by  
the independent Japan Ministry of Posts and Telecommunications  
Communication Research Laboratory (CRL). It is a long wave  
signal transmitted 24 hours a day from the Mt. Otakadoya  
transmitter (40kHz) located in Tamura-gun, Fukushima Prefecture,  
and from the Mt. Hagane transmitter (60kHz) located on the  
border between Saga Prefecture and Fukuoka Prefecture.  
Either the Mt. Otakadoya signal (40kHz) or the Mt.Hagane signal (60kHz)  
Fort Collins, Colorado signal  
Signal is received using  
built-in antenna.  
LAX, DEN, CHI, NYC  
Transmitter  
Long-wave time  
calibration signal  
The U.S. calibration signal (Call Sign: WWVB) is transmitted by  
the National Institute of Standards and technology from Fort  
Collins, Colorado.  
Watch decodes  
received data and  
converts it to time  
data.  
1000km  
3000km  
Transmitter Location  
Transmitter Location  
Signal data  
Decode  
1000km  
Though the calibration signal is normally transmitted 24 hours  
a day, transmission may be interrupted occasionally due to  
maintenance, lightening, etc.  
Mt. Otakadoya  
(40kHz)  
Fort Collins  
500km  
Mt. Hagane  
500km  
Time data  
Internally  
Time is adjusted  
according to time  
data.  
Cesium  
atomic clock  
(60kHz)  
Watch  
1000km  
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 greater  
than 500km, so reception may be poor at long distances.  
Under optimum conditions, the calibration signal should be  
receivable up to 3,000 kilometers from the transmitter.  
Note that the wave is relatively weak at distances greater  
than 1,000km, so reception may be poor at long distances.  
After the watch receives the Standard Time signal, it performs  
internal calculations to determine the current time. Because of  
this, there may be an error of up to one second in the  
displayed time.  
Geographic contours, nearby buildings, the season, the time of day, can even make reception impossible even when you are within range of  
the transmitter.  
Best reception is possible late at night.  
Time Required for Reception  
Receive icon  
Location  
Receiving the Calibration Signal  
Signal reception takes anywhere from about two to six minutes.  
The receive indicator cycles from  
“Unstable” through “Stable” as  
shown below while reception is in  
progress. How far it cycles depends  
on the signal strength. Keep the  
watch in a location where reception  
is stable while reception is in  
progress.  
Reception is difficult and may even be impossible in the locations  
described below. Avoid such locations when performing signal  
reception.  
There are two methods you can use to receive the time calibration  
signal.  
Note that when “AUTO” is specified as the frequency selection  
mode, signal reception can take up to 12 minutes.  
Auto reception (Reception is performed automatically at  
2:00, 3:00, 4:00, and 5:00 each morning.)  
You should think of your watch operating like a radio or TV when it  
is receiving the calibration signal.  
See “Specifying the Transmitter Mode” for more information about  
the transmitter mode.  
Manual receive (You initiate reception using a button operation.)  
The watch is set up for auto reception at the factory, so all you  
need to do is to place it in a location that allows good reception  
each night.  
To trigger reception manually  
In the Timekeeping Mode, hold  
down the Dbutton for about  
two seconds until the watch  
beeps.  
Receive icon  
To make reception easier  
Among or near buildings  
Near high-voltage lines  
Remove the watch from your wrist and place it somewhere so its  
top (12 o’clock side, where the antenna is located) is facing  
approximately in the direction of the signal transmitter. Keep it  
away from metal objects.  
This indicates that manual receive  
has started. The “ ” icon flashes  
on the display while signal  
reception is in progress.  
Unstable  
Stable  
To stop signal reception  
Next to a household appliance  
or office equipment  
Inside a vehicle  
(automobile, train, plane, etc.)  
Even under optimum reception conditions, it can take about 10  
seconds for reception to stabilize.  
Press the D button.  
(TV, speaker, fax, PC,  
mobile phone, etc.)  
Resin band  
All other buttons besides D are disabled during signal reception.  
Use the receive icon to check reception status and to  
determine the best location for signal reception.  
When reception is successful  
The watch terminates reception and adjusts the current time. Next  
it beeps and then displays the date and time the adjustment was  
performed.  
Note that weather, the time of day, surroundings, and other  
factors can all affect reception.  
The “ ” icon on the display also indicates successful signal reception.  
The “ ” icon is cleared from the display each day at 3:00 a.m.  
In a location where there is radio  
interference  
(construction site, airport, etc.)  
Near mountains  
When reception fails  
The watch does not adjust its current time setting, and displays  
Metal band  
“ERR” instead.  
If you are experiencing problems with reception, move away  
from the types of locations described above to a location with  
better reception, and try again.  
Orienting the watch so it is sideways to the transmitter makes it  
more difficult to receive the signal.  
Do not move the watch while it is receiving the calibration signal.  
The display will return to the normal timekeeping screen  
automatically if you do not perform any operation for about one  
or two minutes.  
3
 
Operation Guide 2689  
AUTO  
To view the last reception date and time  
To turn auto reception on and off  
Specifying the Transmitter Mode  
With this setting, the watch automatically selects either the  
Mt. Otakadoya signal (40kHz) or the Mt. Hagane signal  
(60kHz), whichever is strongest.  
The transmitter that was last received successfully is given  
priority for the next receive operation.  
When Tokyo (TYO) is selected as the Home City, you can select  
either of two different transmitters for reception.  
In the Timekeeping Mode, press the Dbutton.  
1.  
In theTimekeeping Mode,  
hold down the Abutton  
for about two seconds  
until the current  
For information about selecting a Home City, see “Setting the  
Time and Date Manually”.  
This displays the date and time that  
signal reception was complete and the  
current time and date were adjusted.  
transmitter selection  
mode setting flashes on  
the display.  
1.  
In the Timekeeping Mode,  
hold down the Abutton  
for about two seconds  
until the current  
transmitter mode setting  
flashes on the display.  
To return to the timekeeping screen,  
press the Dbutton again.  
The display will return to the normal  
timekeeping screen automatically if you  
do not perform any operation for about  
one or two minutes.  
40  
With this setting, the watch always receives the Mt. Otakadoya  
signal (40kHz).  
This is the setting screen.  
60  
With this setting, the watch always receives the Mt. Hagane  
signal (60kHz).  
2.  
Press the C button three  
times.  
This is the setting screen.  
Important!  
This displays the auto  
reception setting screen.  
The calibration signals received by this  
watch include two data groups: an  
hour-minute-second group and a year-  
month-day group.  
FREQUENCY (Frequency)  
2.  
3.  
Press the D button to  
cycle through the  
available transmitter  
mode settings, described  
below.  
Icon not shown  
The “ ” icon is displayed only when  
both the hour-minute-second group  
and year-month-day group are  
received. It will not remain on the  
display if only the hour-minute-second  
group is received.  
3.  
Press the Dbutton to  
toggle auto reception on  
or off.  
When the setting you  
want is displayed, press  
the A button twice to  
exit the setting screen.  
Press the Dbutton to toggle  
auto reception ON and OFF.  
Hour-minute-second group and year-month-day group  
received  
4.  
When the setting you  
want is displayed, press  
the Abutton twice to exit  
the setting screen.  
This exits the setting screen.  
The display also will exit the setting screen automatically if  
you do not perform any operation for about two or three  
minutes.  
” displayed  
Hour-minute-second group only received  
” not shown  
This exits the setting screen.  
The display also will exit the setting screen automatically if you do  
not perform any operation for about two or three minutes.  
If only hour, minute, and second data (no date data) is received,  
the last reception date shows the date that the receive operation  
was performed (as kept in the Timekeeping Mode).  
If you cannot receive the calibration signal or if the current time  
setting is incorrect after signal reception, check the current setup  
of the watch.  
Corrective Measures:Check to make sure the watch is in a  
Calibration Signal Reception  
Precautions  
Troubleshooting  
location where it can receive the signal.  
Cannot perform manual reception.  
Place the watch in a location where  
reception conditions are good.  
Make sure that the watch is in the  
Timekeeping Mode or World Time Mode  
during the auto reception times.  
The following are the watch’s factory default settings, which are  
configured automatically whenever you have the battery of the  
watch replaced.  
Cause:  
Manual receive can be performed in the  
Timekeeping Mode only.  
Auto reception can be performed while the watch is in the  
Timekeeping Mode or World Time Mode only.  
The Home City is set to a city other than  
TYO (Tokyo), NYC (New York), CHI  
(Chicago), DEN (Denver), or LAX (Los  
Angeles).  
Operating any button while auto reception is in progress 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, the season, the time  
of day, can even make reception impossible even when you are  
within range of the transmitter.  
You performed manual reception, which  
clears the “ ” icon from the display.  
Auto Receive  
On  
Auto Japan transmitter select  
(40kHz/ 60kHz)  
Corrective Measures:Perform manual receive in the  
Transmitter  
Home City  
Time setting is incorrect following signal reception.  
Timekeeping Mode.  
Change Home City to TYO (Tokyo), NYC  
Cause:  
Summer time is turned on or the wrong  
Home City is selected.  
(New York), CHI (Chicago), DEN  
Tokyo  
Proper reception may be impossible if there is something blocking  
the signal. If reception is unsuccessful, try again.  
(Denver), or LAX (Los Angeles). For  
information about selecting a Home City,  
see “Setting the Time and Date Manually”.  
Corrective Measures:If the time is advanced by one hour, it  
probably means that summer time  
(indicated by the DST indicator on the  
display) is turned on. If the time is off by  
more than one hour, it probably means  
that the Home City is selected. Use the  
procedure under “Setting the Time and  
Date Manually” to correct the applicable  
setting.  
Auto switching in accordance  
with signal data  
Summer Time  
This watch is designed to adjust its current time setting in  
accordance with the calibration signal transmitted in Japan and  
the United States only. Note that you will need to make your own  
adjustments when using this watch outside of Japan or the United  
States, or in any area that is outside the range of one of the  
receivable time calibration signal transmitters.  
The “ ” icon is not on the display even though auto signal  
reception is turned on.  
Cause:  
The “ ” icon appears after the watch  
successfully receives the calibration  
signal and adjusts the current time setting.  
A single receive operation was not  
successful.  
The “ ” icon is displayed only when both  
the hour-minute-second group and year-  
month-day group were received. It will  
not remain on the display if only the hour-  
minute-second group is received.  
The watch is not in the Timekeeping Mode  
or World Time Mode when an auto  
reception time is reached.  
When the watch is unable to adjust its time signal using the  
calibration signal for some reason, timekeeping accuracy is within  
±15 seconds per month.  
Strong electrostatic charge can cause timekeeping error.  
Signal reception is cancelled if an alarm starts to sound while it is  
being performed.  
The watch’s calendar shows dates up to the year 2099.  
Attempting a receive operation after that causes an error.  
4
 
Operation Guide 2689  
To turn summer time  
World Time Mode  
World time lets you display the current time in any one of 30 cities  
(29 time zones) around the world.  
(Daylight Saving Time) on and off  
You can turn summer time on or off individually for each World  
Time city.  
To search for a city  
1.  
Use the D(+) and B (–)  
buttons to scroll through  
the city codes until the  
one whose summer time  
setting you want to  
(Back)  
Use the D (+) and B (–)  
buttons to scroll through the  
city codes until the one you  
want is displayed.  
When you enter the World Time Mode, the screen for the city that  
was displayed when you last exited the mode appears first.  
change is displayed.  
Holding down either button scrolls  
at high speed.  
See the “World Time City List” for  
information about the display  
sequence of the city codes.  
Holding down either button  
scrolls at high speed.  
Standard Time  
in Displayed City  
(Forward)  
DST indicator  
2.  
While the city code you  
want is displayed, hold  
down the Abutton for  
about one second to turn  
summer time on (DST  
indicator displayed) or off  
(DST indicator not  
City Code  
Home City  
(Timekeeping Mode) Time  
After you set the current time for the Home City in the  
Timekeeping Mode, the World Time Mode calculates the current  
time in other cities around the world using the GMT differential for  
each time zone.  
The seconds count in the World Time Mode is linked with the  
Timekeeping Mode seconds count.  
displayed).  
The watch beeps whenever  
you change the summer time  
setting.  
If a World Time Mode time is incorrect, check the time setting  
and time zone setting of the Timekeeping Mode, and correct  
them if necessary.  
Summer time, or Daylight Saving Time (DST) as is 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 the local area.  
For information about selecting a Home City and setting the  
time, see “Setting the Time and Date Manually”.  
World Time City List  
Viewing Time Stamp (Time Memo) Data  
Use the C button to enter the Recall Mode.  
The Time Stamp function lets you store up to 30 records of time data (month, day, hour, minute, second). Time Stamp records serve as  
helpful memos when you need to remember the current date and time for some reason.  
In the Timekeeping Mode, hold down the B button for about one second to create a Time Stamp record.  
Any time you enter the Recall Mode, the record you were viewing when you last exited the Recall Mode appears first, or, if you created a  
new Time Stamp record since then, the newly created record appears first.  
City Code  
– – –  
HNL  
ANC  
LAX  
City Name  
GMT Differential  
City Code  
JRS  
City Name  
Jerusalem  
Jeddah  
Teheran  
Dubai  
GMT Differential  
–11  
–10  
–9  
–8  
–7  
–6  
–5  
–4  
–3  
–2  
–1  
+0  
+0  
+1  
+1  
+2  
+2  
+2  
+3  
Honolulu  
Anchorage  
Los Angeles  
Denver  
JED  
THR  
DXB  
KBL  
+3.5  
+4  
DEN  
CHI  
Kabul  
+4.5  
+5  
To view Time Stamp records  
To delete time stamp records  
Chicago  
KHI  
Karachi  
Delhi  
In the Recall Mode, use the D  
(+) and B (–) buttons to scroll  
through Time Stamp records.  
In the Recall Mode, hold  
down the Abutton for  
two or three seconds  
NYC  
CCS  
RIO  
New York  
Caracas  
DEL  
DAC  
RGN  
BKK  
HKG  
SEL  
+5.5  
+6  
Dakar  
Holding down either button scrolls  
at high speed.  
This clears all Time Stamp  
records.  
Rio De Janeiro  
Yangon  
Bangkok  
Hong Kong  
Seoul  
+6.5  
+7  
Note that you cannot delete  
individual Time Stamp  
records.  
– – –  
– – –  
GMT  
LON  
PAR  
BER  
ATH  
+8  
Memo number  
Greenwich Mean Time  
+9  
London  
Paris  
TYO  
ADL  
SYD  
NOU  
WLG  
Tokyo  
+9  
Adelaide  
Sydney  
Noumea  
Wellington  
+9.5  
+10  
+11  
+12  
Berlin  
Athens  
Cairo  
CAI  
The contents of the above table are current as of June 2002.  
Time differentials in the above table are in accordance with Universal Time Coordinated (UTC).  
5
 
Operation Guide 2689  
(Back)  
3.  
Use the D(+) and B(–)  
buttons to change the  
hour setting.  
6.  
When all the settings are  
the way you want, press  
the Abutton.  
Alarm Mode  
Holding down either button  
scrolls at high speed.  
This exits the setting screen.  
Your watch comes with five alarms and an hourly time signal.  
To set an alarm  
The display also will exit the setting screen automatically if  
you do not perform any operation for about two or three  
minutes.  
When setting the hour, make  
sure you specify AM (A) or PM  
(P) correctly when using  
12-hour timekeeping, or that  
you specify the correct 24-  
hour time.  
The same 12-hour/24-hour  
format you select for the  
Timekeeping Mode time is  
also applied in the Alarm  
Mode.  
Daily Alarms (AL 1 to AL 4)  
1.  
In the Alarm Mode, use  
the Dbutton to scroll  
through the alarm  
screens until the one  
whose setting you want to  
configure is displayed.  
(Forward)  
The watch beeps for about 10 seconds when an alarm time is  
reached.  
Stopping the Alarm Beeper  
Press any button.  
Snooze Alarm (SNZ)  
In the case of the snooze alarm the alarm will sound again in  
about five minutes. “SNZ” flashes while the snooze alarm is active  
(indicating that the alarm will sound again).  
With the snooze alarm, the watch beeps for 10 seconds when the  
alarm time is reached, and up to seven times at five-minute  
intervals thereafter (approximately 30 minutes total). Pressing any  
button stops the beeper, but the alarm will sound again after five  
minutes.  
Alarm Number  
The snooze alarm will be canceled automatically when any of the  
following occurs while the SNZ indicator is flashing on the display.  
Alarm 1  
(AL1)  
Alarm 2  
Alarm 3  
(AL3)  
(AL2)  
If you turn off the snooze alarm in the Alarm Mode  
If you enter the Alarm Mode, and then display the setting  
screen.  
If you enter the Timekeeping Mode and then display the setting  
screen.  
4.  
Press the C button so  
the minute setting  
flashes.  
Hourly Time Signal  
Hourly Time  
Signal (SIG)  
Snooze Alarm  
(SNZ)  
Alarm 4  
(AL4)  
The hourly time signal causes the watch to beep every hour on the  
hour.  
2.  
Hold down the Abutton  
for about two seconds  
until the hour digits of the  
alarm time start to flash.  
Alarm Indicator  
Testing the Alarm  
Minute  
In the Alarm Mode, hold down the B button to sound the alarm.  
(Back)  
5.  
Use the D (+) and B  
(–) buttons to change the  
minute setting.  
This also causes the alarm  
indicator to appear and  
automatically turns on the  
alarm.  
Holding down either button  
scrolls at high speed.  
Hour  
(Forward)  
To turn an alarm or the hourly time  
signal on or off  
Stopwatch Mode  
The stopwatch measures elapsed time in units of 1/100 second up to 23 hours, 59 minutes, 59.99 seconds (24 hours). When the  
maximum limit is reached, the elapsed time automatically returns to zero and timing continues from there.  
1.  
In the Alarm Mode, use  
the Dbutton to display  
the screen for the setting  
you want to turn on or off.  
Elapse Time Measurement  
Performing Stopwatch Operations  
In the Stopwatch Mode, press the D button.  
2.  
Press the B button to  
toggle the currently  
display setting on or off.  
Start  
Stop  
Reset  
Each press of the Dbutton starts or stops the stopwatch.  
The graphic display turns on and off every five seconds,  
coordinated with Timekeeping Mode time.  
Cumulative Time Measurement  
Pressing the Dbutton to restart the stopwatch without resetting  
it to all zeros resumes elapsed time measurement from where it  
was last stopped.  
Alarm  
Hourly Time Signal  
Hourly Time Signal  
Indicator  
Alarm Indicator  
Graphic Display  
(Split/Reset)  
Split Time Measurement  
Start  
Record split Release split  
Stop  
Reset  
Reset  
Minutes  
1/100-second  
1st and 2nd Place Finishers  
(Start/Stop)  
Snooze Alarm  
Seconds Hours  
Start  
1st finisher  
(Displays time  
of 1st finisher.)  
2nd finisher Displays time  
of 2nd finisher.  
Snooze Indicator  
Pressing Bwhile timing is being performed freezes the current elapsed time on the display, but timing of the next split continues  
internally.  
Changing to another mode while a split time is displayed cancels the split time operation.  
Pressing the Bbutton while timing is stopped resets the stopwatch to all zeros.  
6
 
Operation Guide 2689  
Setting the Time and Date Manually  
3.  
While the Home City code  
is flashing, use the D(+)  
and B(–) buttons to  
scroll through the city  
codes.  
AUTO  
This setting enables the auto summer time setting, which  
turns summer time on or off in accordance with the received  
time calibration signal.  
This setting uses Japan summer time data when TYO is  
selected as the Home City code, and U.S. summer time  
data when NYC, CHI, DEN, or LAX is selected as the  
Home City code.  
In the United States, Daylight Saving Time (summer time)  
is from 2:00 a.m. on the first Sunday in April until 1:00 a.m.  
on the last Sunday in October.  
You can use the following procedure to set the current time and date of the Home City that you have selected in the Timekeeping Mode.  
Always use the Timekeeping Mode to set and adjust the current time and date settings.  
Holding down either button  
scrolls at high speed.  
City Code  
See the “World Time City List”  
for information about the  
display sequence of the city  
codes.  
Settings  
To configure settings  
1.  
In theTimekeeping Mode,  
hold down the A button  
for about two seconds  
until the transmitter  
selection mode setting  
starts to flash on the  
display.  
Timekeeping Mode  
OFF  
(Hold down about two seconds.)  
4.  
While the summer time  
setting is flashing, press  
the D button to cycle  
through the summer time  
settings until the one you  
want is displayed.  
This setting turns off summer time and displays the current  
time normally.  
Transmitter Mode  
Home City  
Summer Time  
Minute  
On  
This setting turns on summer time and advances the current  
time by one hour.  
The DST indicator appears on the display while summer  
time is turned on.  
This is the setting screen.  
Available settings are AUTO, OFF, and ON.  
Auto Reception Setting  
2.  
Use the Cand A  
buttons so the setting you  
want to change is flashing  
on the display.  
Note that the above setting toggles between “OFF” and “On”  
when any city code other than HKG, SEL, TYO, NYC, CHI, DEN,  
LAX, ANC, or HNL is selected as the Home City.  
Summer time, or Daylight Saving Time (DST) as is it is called  
in some countries, calls for setting clocks ahead one hour  
during the summer season.  
12-24 hour  
Seconds  
Day  
Hour  
Note that the use of summer time depends on the country and  
even the local area. Note that the use of summer time  
depends on the country and even the local area.  
5.  
While the 12/24-hour  
timekeeping setting is  
flashing, press the D  
button to select the  
setting you want.  
Power Saving  
Month  
Year  
While the setting screen (the one with a flashing setting) is on the  
display, use the Cand Abuttons to move the flashing between  
settings.  
Pressing D toggles the  
timekeeping format between  
12-hour (“12H” indicator) and  
24-hour (24H indicator).  
12/24-hour  
6.  
While the seconds count  
is flashing, press the D  
button to reset it to 00.  
8.  
Press the D button to  
toggle Power Saving on  
or off.  
Pressing Dwhile the seconds  
count is in the range of 30 to  
59 resets it to 00 and also  
adds 1 to the minutes.  
Resets to 00.  
Minute  
Pressing Din the range of 00  
to 29 resets the seconds count  
without changing the minutes.  
Use the C and Abuttons to select each of the settings and  
the Dand Bbuttons to change them.  
7.  
While the hour, minute,  
year, month, or day  
setting is flashing, use the  
D(+) and B(–) buttons  
to change the setting.  
9.  
When all the settings are  
the way you want, press  
the A button.  
(Back)  
The figures on the display stop flashing.  
Hour  
Month  
Holding down either button  
scrolls at high speed.  
When setting the hour,  
make sure you specify AM  
(A) or PM (P) correctly, or  
that you specify the correct  
24-hour time.  
The display also will exit the setting screen automatically if  
you do not perform any operation for about two or three  
minutes.  
(Forward)  
Day Year Seconds  
The watch automatically makes adjustments for leap years  
and month lengths.  
You can set a date in the range of January 1, 2000 to  
December 31, 2099.  
The day of the week is set automatically in accordance with  
the date you set.  
7
 

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