Casio 5131 User manual

1
Operation Guide 5131 (OC)
MA1002-EA
Congratulations upon your selection of this CASIO watch.
This watch does not have a city code that corresponds to the UTC offset of –3.5 hours. Because of
this, the radio-controlled atomic timekeeping function will not display the correct time for Newfoundland,
Canada.
Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any damage or loss suffered by
you or any third party arising through the use of this product or its malfunction.
About This Manual
Button operations are indicated using the letters Athrough Dshown in the
illustration.
Hand Functions
z Hour Hand
x Second Hand
c Minute Hand
v Left Dial Hand: Indicates the current mode
b Lower Dial Hand
n Right Dial Hands: Indicate a time, in 24-hour format, depending on the
current mode.
m Day
This User’s Guide uses numbers shown above to identify watch hands and
indicators.
Things to check before using the watch
1. Hold down Cat least two seconds to enter the Timekeeping Mode, and then observe the
movement of the xSecond Hand.
Is the xSecond Hand moving smoothly at one-second intervals?
Is the xSecond Hand moving at two-second intervals
or is it stopped completely?
Go to step 2.
The watch is charged sufficiently. For
details about charging, see “Charging
the Watch”.
Power is low. Charge the watch by placing it in a
location where it is exposed to light. For details, see
“Charging the Watch”.
NO
YES
YES
NEXT
2. Check the Home City and the daylight saving time (DST) setting.
Use the procedure under “To configure Home City settings” to configure your Home City and daylight
saving time settings.
Important!
Proper time calibration signal reception and World Time settings depend on correct Home City, time,
and date settings in the Timekeeping Mode. Make sure you configure these settings correctly.
3. Set the current time.
•To set the time using a time calibration signal
See “To get ready for a receive operation”.
•To set the time manually
See “Configuring Current Time and Date Settings Manually”.
The watch is now ready for use.
For details about the watch’s radio controlled timekeeping feature, see “Radio Controlled Atomic•
Timekeeping”.
Charging the Watch
The face of the watch is a solar cell that generates power from light. The generated power charges a
built-in rechargeable battery, which powers watch operations. The watch charges whenever it is exposed
to light.
Charging Guide
Whenever you are not
wearing the watch, be sure
to leave it in a location where
it is exposed to light.
Best charging•
performance is achieved
by exposing the watch to
light that is as strong as
possible.
When wearing the watch, makes
sure that its face is not blocked
from light by the sleeve of your
clothing.
The watch may enter a sleep•
state if its face is blocked by
your sleeve even only partially.
Warning!
Leaving the watch in bright light for charging can cause it to become quite hot. Take care when
handling the watch to avoid burn injury. The watch can become particularly hot when exposed to
the following conditions for long periods.
On the dashboard of a car parked in direct sunlight•
Too close to an incandescent lamp•
Under direct sunlight•
Important!
Keep the watch in an area normally exposed to bright light when storing it for long periods. This helps•
to ensure that power does not run down.
Storing the watch for long periods in an area where there is no light or wearing it in such a way that it is•
blocked from exposure to light can cause power to run down. Make sure that the watch is exposed to
bright light whenever possible.
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Power Levels
You can get an idea of the watch’s power level by observing the movement of
the xSecond Hand in the Timekeeping Mode.
If the•xSecond Hand is moving normally at one-second intervals, power is
at Level 1.
If the•xSecond Hand is moving at two-second intervals, power is at Level
2, which is quite low. Expose the watch to light as soon as possible so it
can charge.
Level Hand Movement Function Status
1 Normal. All functions enabled
2
xSecond Hand moves at two-second
intervals.
mDay changes to 1(home position).
Beeper, time calibration signal
reception, and countdown timer
operation disabled
3
xSecond Hand stopped.
z Hour Hand and cMinute Hand
stopped at 12 o’clock.
All functions disabled
When power drops to Level 3, all functions will be disabled but the watch will continue to keep time•
internally for about one week. If you recharge the battery sufficiently during this period, the analog
hands will move automatically to the correct setting and regular timekeeping will resume. After one
week, all settings (including timekeeping) will be cleared. Recharging the battery will reset all settings
to their initial factory defaults.
Power Recovery Mode
The watch is designed to go into a power recovery mode that stops hand operation temporarily whenever
power suddenly drops below a certain level due to overuse of the alarm tone over a short period. Note
that all operations are disabled while the watch is in the power recovery mode.
The hands will move to the correct positions and the watch will resume normal operation after power
recovers (in about 15 minutes). Putting the watch in a location where it is exposed to light will help power
to recover sooner.
Charging Times
Exposure Level (Brightness) Daily
Operation *1
Level Change *2
Level 3 Level 2 Level 1
Outdoor sunlight (50,000 lux) 8 minutes 2 hours 23 hours
Window sunlight (10,000 lux) 30 minutes 6 hours 85 hours
Window sunlight on cloudy day (5,000 lux) 48 minutes 9 hours 138 hours
Indoor fluorescent lighting (500 lux) 8 hours 92 hours – – –
1 Approximate exposure each day to generate power for normal daily operation.*
2 Approximate exposure to take power up one level.*
The above times are for reference only. Actual times depend on lighting conditions.•
For details about the operating time and daily operating conditions, see the “Power Supply” section of•
the Specifications.
Power Saving
Power Saving enters a sleep state automatically whenever the watch is left for a certain period in an area
where it is dark. The table below shows how watch functions are affected by Power Saving.
There actually are two sleep state levels: “second hand sleep” and “function sleep”.•
Elapsed Time in Dark Operation
60 to 70 minutes (second hand sleep) xSecond Hand only stopped at 12 o’clock, all other functions enabled
6 or 7 days (function sleep) All functions, including analog timekeeping, disabled•
Internal timekeeping maintained•
The watch will not enter a sleep state between 6:00 AM and 9:59 PM. If the watch is already in a sleep•
state when 6:00 AM arrives, however, it will remain in the sleep state.
The watch will not enter a sleep state while it is in the Stopwatch Mode•or Countdown Timer Mode.
To recover from the sleep state
Move the watch to a well-lit area or press any button.
Radio Controlled Atomic Timekeeping
This watch receives a time calibration signal and updates its time setting accordingly. However, when
using the watch outside of areas covered by time calibration signals, you will have to adjust the settings
manually as required. See “Configuring Current Time and Date Settings Manually” for more information.
This section explains how the watch updates its time settings when the city code selected as the Home
City is in Japan, North America, Europe, or China, and is one that supports time calibration signal
reception.
If your Home City Code setting is this: The watch can receive the signal from the transmitter
located here:
LONDON (LON), PARIS (PAR), ATHENS (ATH) Anthorn (England), Mainflingen (Germany)
HONG KONG (HKG) Shangqiu City (China)
TOKYO (TYO) Fukushima (Japan), Fukuoka/Saga (Japan)
HONOLULU (HNL), ANCHORAGE (ANC),
LOS ANGELES (LAX), DENVER (DEN),
CHICAGO (CHI), NEW YORK (NYC)
Fort Collins, Colorado (United States)
Important!
The areas covered by•HONOLULU (HNL) and ANCHORAGE (ANC) are quite far from the calibration
signal transmitters, so certain conditions may cause reception problems.
When•HONOLULU (HNL) or HONG KONG (HKG) is selected as the Home City, only the time and date
are adjusted according to the time calibration signal. You need to switch manually between standard
time and daylight saving time (DST) if required. See “To toggle the Home City time between standard
time and daylight saving time” for information about how to do this.
Moves at two-second
intervals.
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Operation Guide 5131 (OC)
Approximate Reception Ranges
Japanese Signals Chinese Signal
Fukushima
500 kilometers
1,000 kilometers
Fukuoka/Saga
1,500 kilometers
Changchun500 kilometers
Beijing
Shangqiu
Shanghai
Chengdu
Hong Kong
UK and German Signals North American Signal
Anthorn
500 kilometers
1,500 kilometers
Mainflingen
The Anthorn signal is receivable
within this area.
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
Even when the watch is within range of a transmitter, signal reception may be impossible due to the•
effects of geographic contours, structures, weather, the time of year, the time of day, radio interference,
etc. The signal becomes weaker at distances of approximately 500 kilometers, which means that the
influence of the conditions listed above becomes even greater.
Signal reception may not be possible at the distances noted below during certain times of the year or•
day. Radio interference may also cause problems with reception.
Mainflingen (Germany) or Anthorn (England) transmitters: 500 kilometers (310 miles)−
Fort Collins (United States) transmitter: 600 miles (1,000 kilometers)−
Fukushima or Fukuoka/Saga (Japan) transmitters: 500 kilometers (310 miles)−
Shangqiu (China) transmitter: 500 kilometers (310 miles)−
As of November 2009, China does not use Daylight Saving Time (DST). If China does go to the Daylight•
Saving Time system in the future, some functions of this watch may no longer operate correctly.
Using this watch in a country covered by a time calibration signal that is different from the countries it•
supports may result in incorrect time indication due to local application of summer time, etc.
To get ready for a receive operation
Confirm that the watch is in the Timekeeping Mode. If it isn’t, hold down1. Cat least two seconds to
enter the Timekeeping Mode.
Place the watch in a location where signal reception is good.2.
12 o’clock
or
Position the watch as shown in the nearby illustration,•
with 12 o’clock pointed towards a window. Make sure
there are no metal objects nearby
Signal reception normally is better at night.•
The receive operation takes from two to seven minutes,•
but in some cases it can take as long as 14 minutes.
Take care that you do not perform any button operation
or move the watch during this time.
Signal reception may be difficult or even impossible under the conditions described below.•
Inside or among
buildings
Inside a vehicle Near household
appliances,
office
equipment, or a
mobile phone
Near a
construction
site, airport, or
other sources of
electrical noise
Near high-
tension power
lines
Among
or behind
mountains
What you should do next depends on whether you are using Auto Receive or Manual Receive.3.
Auto Receive: Leave the watch over night in the location you selected in step 2. See “Auto Receive”•
for details.
Manual Receive: Perform the operation under “To perform manual receive”.•
Auto Receive
With Auto Receive, the watch performs the receive operation each day automatically up to six times (up•
to five times for the Chinese calibration signal) between the hours of midnight and 5 a.m. (according
to the Timekeeping Mode time). When any receive operation is successful, none of the other receive
operations for that day are performed.
When a calibration time is reached, the watch will perform the receive operation only if it is in the•
Timekeeping Mode or World Time Mode. The receive operation is not performed if a calibration time is
reached while you are configuring settings.
To perform manual receive
In the Timekeeping Mode, keep1. Adepressed (for about two seconds) as the xSecond Hand goes
through the following sequence.
Moves to•YES (or Yfor some models) or NO (N) to indicate the last signal reception result, then to
READY (R).
The2. xSecond Hand indicates the operations the watch is currently performing.
When the xSecond Hand is
pointed here: It means this:
READY (R) Watch is setting up for reception.
WORK (W) Reception is in progress.
YES (Y) Reception was completed successfully.
NO (N) Reception failed for some reason.
If signal reception is unstable, the•xSecond Hand may move between
WORK (W) and READY (R).
The receive operation is complete when the3. xSecond Hand moves to YES
(Y) or NO (N) for about five seconds, and then resumes regular timekeeping.
You can return to the Timekeeping Mode manually by pressing•Awhile
the xSecond Hand is pointing to YES (Y) or NO (N).
When the receive operation is successful, the watch adjusts the time•
setting accordingly. It does not adjust the setting if the operation failed.
Note
To interrupt a receive operation and return to the Timekeeping Mode,•
press any button.
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To check the result of the latest receive operation
In the Timekeeping Mode, press A.
The•xSecond Hand will move to YES (Y) for five seconds if the latest
receive operation was successful, or NO (N) if it was not. After that, regular
timekeeping will resume.
You can return to the Timekeeping Mode manually by pressing•Awhile the
xSecond Hand is pointing to YES (Y) or NO (N).
Note
The•xSecond Hand will indicate NO (N) if you have adjusted the time or
date setting manually since the latest receive operation.
Radio-controlled Atomic Timekeeping Precautions
Strong electrostatic charge can result in the wrong time setting.•
Even if a receive operation is successful, certain conditions can cause the time setting to be off by up•
to one second.
The watch is designed to update the date and day of the week automatically for the period January•
1, 2000 to December 31, 2099. Updating of the date by signal reception will no longer be performed
starting from January 1, 2100.
If you are in an area where signal reception is not possible, the watch keeps time with the precision•
noted in “Specifications”.
The receive operation is disabled under any of the following conditions.•
While power is at Level 2 or lower−
While the watch is in the power recovery mode−
When the watch is in the function sleep state (power saving)−
While a countdown time operation is in progress−
A receive operation is cancelled if an alarm sounds while it is being performed.•
Mode Reference Guide
Your watch has three “modes”. The mode you should select depends on what you want to do.
To do this: Enter this mode:
View the current time in your Home City and in one of 29 other cities around•
the globe
View the current date in the Home City•
Configure Home City and daylight saving time (DST) settings•
Perform a time calibration receive operation•
Configure time and date settings manually•
Timekeeping Mode
Use the countdown timer Countdown Timer Mode
Use the stopwatch to measure elapsed time Stopwatch Mode
View the current time in one of 29 cities (time zones) around the globe World Time Mode
Set an alarm time Alarm Mode
Selecting a Mode
With this watch, everything starts from the Timekeeping Mode.
To determine the watch’s current mode
Check the position of the vLeft Dial Hand as shown under “To select a mode”.
To return to the Timekeeping Mode from any other mode
Except while the watch is performing auto hand home position correction, hold
down Cat least two seconds.
To select a mode
Press Cto cycle between the modes as shown below. The vLeft Dial Hand
indicates the currently selected mode.
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Timekeeping Mode Countdown Timer Mode
Alarm Mode
Stopwatch Mode
World Time Mode
The hand indicates the day of
the week (SU, MO, TU, WE, TH,
FR, SA).
The hand moves to TR and then
indicates the countdown timer
minutes.
The hand points to AL.
The hand moves to ST and then
indicates the stopwatch 1/20-
second count.
The hand points to STD or DST.
C
Timekeeping
Use the Timekeeping Mode to view the current time and date. To enter the Timekeeping Mode from any
other mode, hold down Cat least two seconds.
Hand Functions
z Hour Hand
x Second Hand
c Minute Hand
v Left Dial Hand: Indicates the day of the week.
b Lower Dial Hand: Indicates the current hour in the Home City time in
24-hour format.
n Right Dial Hands:
Indicate the current time in the World Time City in 24-hour format.
m Day
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Operation Guide 5131 (OC)
Configuring Home City Settings
There are two Home City settings: actually selecting the Home City and selecting either standard time or
daylight saving time (DST).
To configure Home City settings
Note
This watch does not have a city code that corresponds to Newfoundland.•
In the Timekeeping Mode, keep1. Adepressed (for about five seconds) as
the xSecond Hand goes through the following sequence.
Moves to•YES (or Yfor some models) or NO (N) to indicate the last signal
reception result, then to READY (R), and then to the city code of the
currently selected Home City.
This indicates the city code setting mode.•
The watch will exit the setting mode automatically if you do not perform•
any operation for about two or three minutes.
For details about city codes, see the “City Code Table”.•
To change the Home City setting, press2. Dto move the xSecond Hand
clockwise.
Keep pressing•Duntil the xSecond Hand is pointing at the city code
you want to select as your Home City.
Each time you select a city code, the•zHour Hand, cMinute Hand,
bLower Dial Hand and mDay move to the current time and date for
that city code. Do not perform the next operation until these hands stop
moving.
Press3. Bto toggle the time for the currently selected city code between STD (standard time)/DST
(daylight saving time).
In the city code setting mode, the•vLeft Dial Hand indicates the current daylight saving time setting
as STD (standard time) or DST (daylight saving time).
Note that you cannot switch between•STD (standard time)/DST (daylight saving time) while UTC is
selected as your Home City.
After all the setting is the way you want, press4. Ato return to the Timekeeping Mode.
To toggle the Home City time between standard time and daylight saving time
Perform the step 1 under “To configure Home City settings”.1.
Each time you select a city code, the•zHour Hand, cMinute Hand, and bLower Dial Hand
move to the current time for that city code. Do not perform the next operation until these hands stop
moving.
Press2. Bto toggle the time for the city code of the currently selected Home City between STD
(standard time)/DST (daylight saving time).
In the city code setting mode, the•vLeft Dial Hand indicates the current daylight saving time setting
as STD (standard time) or DST (daylight saving time).
Note that you cannot switch between•STD (standard time)/DST (daylight saving time) while UTC is
selected as your Home City.
After all the setting is the way you want, press3. Ato return to the Timekeeping Mode.
Note
After you specify a city code, the watch will use UTC* offsets in the World Time Mode to calculate the•
current time for other time zones based on the current time in your Home City.
Selecting some city codes makes it possible for the watch to receive the time calibration signal for the•
corresponding area automatically. See “Radio Controlled Atomic Timekeeping” for details.
Coordinated Universal Time, the world-wide scientific standard of timekeeping. The reference point for*
UTC is Greenwich, England.
Configuring Current Time and Date Settings Manually
You can configure current time and date settings manually when the watch is unable to receive a time
calibration signal.
To change the current time setting manually
In the Timekeeping Mode, keep1. Adepressed (for about five seconds) as
the xSecond Hand goes through the following sequence.
Moves to•YES (or Yfor some models) or NO (N) to indicate the last signal
reception result, then to READY (R), and then to the city code of the
currently selected Home City.
At this time, the•vLeft Dial Hand will indicate the Home City’s current
daylight saving time setting (STD or DST).
Change the Home City and daylight saving time (DST) settings, if you want.2.
For details about these settings, see steps 2 and 3 under “To configure•
Home City settings”.
In the following steps, each press of•Ccycles between settings as
shown below.
Home city/DST Hour/Minute Year
Day Month
Press3. C.
The watch will beep, and the•xSecond Hand and vLeft Dial Hand will move to their 12 o’clock
positions. This is the time setting mode.
Use4. D(+) and B(–) to change the time (hour and minute) setting.
Each press of either button will move the hands (•zHour Hand and cMinute Hand) one minute.
Holding down•Dor Bwill start high-speed zHour Hand and cMinute Hand movement in the
applicable direction. To stop high-speed hand movement, press any button.
The•bLower Dial Hand and zHour Hand move in sync with each other.
When setting the time, make sure that the•bLower Dial Hand indicates the proper a.m./p.m. hour.
If you want to change the date setting at this time, press•Cand perform the procedure starting from
step 3 under “To change the current date setting manually”.
After the time setting is the way you want, press5. Ato return to the Timekeeping Mode.
This will cause the•xSecond Hand to move automatically to 12 o’clock and resume movement from
there.
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To change the current date setting manually
In the Timekeeping Mode, keep1. Adepressed (for about five seconds) as
the xSecond Hand goes through the following sequence.
Moves to•YES (or Yfor some models) or NO (N) to indicate the last
signal reception result, then to READY (R), and then to the city code of
the currently selected Home City.
Press2. Ctwice.
The watch will beep and change to the year setting mode.•
The year can be set in the range of 2000 to 2099.•
Use3. Dand Bto change the year setting.
Each press of•Bwill move the vLeft Dial Hand and change the tens
digit of the year setting.
Each press of•Dwill move the xSecond Hand and change
the ones digit of the year setting.
After the year setting is the way you want, press4. C.
The watch will beep and change to the month setting mode.•
Use5. Dto move the xSecond Hand to the month setting you
want.
After the month setting is the way you want, press6. C.
The watch will beep and change to the day setting mode.•
Use7. D(+) and B(–) to change the mDay setting.
If you want to change the time setting at this time, press•Cand then
perform the procedure starting from step 3 under “To change the current
time setting manually”.
After the settings are the way you want, press8. Ato return to the
Timekeeping Mode.
This will cause the•xSecond Hand to move automatically to 12 o’clock
and resume movement from there.
•The day of the week indicated by the vLeft Dial Hand changes
automatically in accordance with the date (year, month, and day).
Note
The watch’s built-in full automatic calendar makes allowances for different month lengths and leap•
years. Once you set the date, there should be no reason to change it except after you have the watch’s
rechargeable battery replaced or after power drops to Level 3.
Using the Countdown Timer
The countdown timer can be configured within a range of one minute to 10 minutes. You also can reset
the countdown timer to the preset “reset time” of 5 minutes with the press of a button. A progress beeper
keeps you informed of the progress of the countdown. An alarm sounds when the timer reaches zero,
and a count up elapsed time operation starts. All of this makes the countdown timer a useful tool for yacht
racing.
Hand Functions
x Second Hand:
Moves counter-clockwise to countdown the seconds. Automatically
switches to clockwise movement after the end of the countdown is reached
to count up the seconds of the elapsed time operation.
v Left Dial Hand: Moves to TR and then indicates the countdown timer
minutes.
n Right Dial Hands:
Show time elapsed after the end of a countdown is reached.
Countdown Timer Beeper Operations
The watch beeps at various times during a countdown so you can keep
informed about the countdown status without looking at the display. The
following describes the types of beeper operations the watch performs during
a countdown.
Countdown End Beeper
The watch beeps each second of the final 10 seconds before a countdown reaches zero, and at zero. The
watch emits a longer beep to signal when the countdown reaches zero.
The countdown end beeper always sounds and cannot be turned off.•
Progress Beeper
The progress beeper sounds at the 5, 4, 3, 2, and 1-minute point, and 30-second point of the countdown.
If you set a countdown start time of 2 to 5 minutes, the progress beeper will start to sound after the•
first minute is counted down. If you set a countdown start time of 3 minutes, for example, the progress
beeper will start to sound when the countdown reaches the 2-minute point.
If you set a countdown start time of 1 minute, the progress beeper will sound once when the•
countdown reaches the 30-second point.
The progress beeper always sounds and cannot be turned off.•
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00
50
10
40
20
30
90
60
80
70
Setting the year (tens digit)
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Setting the year (ones digit)
0 1
2
3
4
9
8
6 57
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Dec
Nov
Feb
Mar
Apr
Oct
Sep
Aug
Jan
Jul May
Jun
Setting the month
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Operation Guide 5131 (OC)
Countdown Timer Examples
Countdown start time: 10 minutes
Start Time Reset Time Progress Beeper
Countdown
End Beeper
10'00" 5'00" 4'00" 3'00" 2'00" 1'00" 0'30" 0'10" 0'00"
0'10" 0'09" 0'08" 0'07" 0'06" 0'05" 0'04" 0'03" 0'02" 0'01"
To specify the countdown start time
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10
5
1
4
2
3
9
6
8
7
Setting the minute
The1. vLeft Dial Hand will move to TR and then indicate the countdown timer
minutes.
After confirming that the2. xSecond Hand is stopped (which indicates there is no
ongoing countdown timer operation), press D.
If the•xSecond Hand is moving, press Bto stop it and then press D.
Use3. Dto specify the countdown start time.
Each press of•Dwill move the vLeft Dial Hand forward one minute.
The maximum countdown start time setting is 10 minutes. To set a countdown•
start time of 10 minutes, move the vLeft Dial Hand to 0.
To perform a countdown timer operation
BB D
Start Stop Reset
B D B
Start Resets timer to 5 minutes. Restart
BDD
Start Resets timer to 5 minutes. Reset
Pressing•Dwhile the Countdown Timer is stopped resets the displayed time to the start time specified
by you.
Pressing•Dwhile a countdown is in progress will stop the countdown and change the start time to
5 minutes (preset reset time). After that, you can press Bto restart the countdown from 5 minutes.
Pressing•Dwhile a 5-minute (preset reset time) operation is stopped resets to the start time specified
by you.
Pressing•Dwill not perform a reset while the hands or digital display of the watch is performing any of
the following operations.
While the hands are moving to the current timer time after you enter the Countdown Timer Mode.−
While the displayed date is changing at midnight.−
Before starting a countdown timer operation, check to make sure that the countdown timer is not•
already operating (indicated by a moving xSecond Hand). If it is, press Bto stop it and then Dto
reset to the countdown start time.
While a countdown operation is in progress, the•xSecond Hand move counterclockwise. When the
end of a countdown is reached, the xSecond Hand change direction and start moving clockwise to
measure elapsed time after the end of the countdown. The elapsed time operation continues until you
press Bto stop it.
Elapsed Time Measurement Following Countdown
When the countdown reaches zero, the watch starts a count up elapsed time operation in one-second
increments. The xSecond Hand moves clockwise during the elapsed time operation.
The•nRight Dial Hands indicate the time elapsed after the end of a countdown is reached.
You can pause an elapsed time operation by pressing•B. While an elapsed time operation is paused,
pressing Dresets to the timer start time.
To stop the alarm
Press any button.
Note
Pressing any button while the alarm is sounding simply stops the alarm sound. It does not stop the•
elapsed time operation that started when the end of the countdown was reached. To stop the elapsed
time operation, press B.
Using the Stopwatch
The stopwatch measures elapsed time and split times.
Hand Functions
x Second Hand: Indicates the stopwatch seconds count.
v Left Dial Hand: Moves to ST and then indicates the stopwatch 1/20-second
count.
n Right Dial Hands: Indicate the stopwatch hours and minutes.
To perform elapsed time measurement
Use1. Cto move the vLeft Dial Hand to ST.
Now you can perform either of following stopwatch operations.2.
To perform an elapsed time operation
BBBBD
Start Stop (Restart) (Stop) Reset
To pause at a split time
BDNormal stopwatch hand movement will
resume automatically after five seconds.
BD
Start Split Stop Reset
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Note
The Stopwatch Mode can indicate elapsed time up to 23 hours, 59 minutes, 59.95 seconds.•
In the following cases, the hands of the watch are moving, so pressing•Dwill not perform a split or
reset operation.
While the hands are moving to elapsed timekeeping after you enter the Stopwatch Mode−
While the watch is changing dates at midnight−
Once started, stopwatch timing continues until you press•Bto stop it, even if you exit the Stopwatch
Mode to another mode and even if timing reaches the stopwatch limit defined above.
You can press•Bto start an elapsed time operation immediately after entering the Stopwatch Mode,
even if the watch’s hands are still moving to their initial Stopwatch Mode positions. Note, however, that
if the stopwatch was not reset after the last elapsed time operation, timing will restart from where it was
last stopped, and not from 0.
The•vLeft Dial Hand indicates the 1/20-second count for the first 30 seconds of a stopwatch elapsed
time operation. After that, the hand stops at 0. 1/20-second timing continues internally after the first 30
seconds, and the vLeft Dial Hand will jump to the current value whenever B(Stop) or D(Split) is
pressed.
Checking the Current Time in a Different Time Zone
You can use the World Time Mode to view the current time in one of 29 time zones around the globe. The
city that is currently selected in the World Time Mode is called the “World Time City”.
Hand Functions
x Second Hand: Indicates the currently selected World Time City.
v Left Dial Hand: Indicates the current STD (standard time) or DST (daylight
saving time) setting of the currently selected time zone.
n Right Dial Hands: Indicate the current time in the selected World Time City
in 24-hour format.
To view the time in another time zone
Use1. Cto move the vLeft Dial Hand to STD or DST.
The•xSecond Hand will move to the city code of the currently selected
World Time City.
Use2. Dto move the xSecond Hand to the city code you want to select as the World Time City.
The•nRight Dial Hands will move to the current time in the time zone of the current city code. At this
time, the zHour Hand and cMinute Hand will continue to indicate the current time in the Home
City.
For full information on city codes, see the “City Code Table”.•
If you think that the time indicated for the selected time zone is not correct, it probably means that•
there is something wrong with your Home City settings. Use the procedure under “To configure
Home City settings” to correct the Home City settings.
To specify standard time or daylight saving time (DST) for a city
Hold down
Afor two
seconds
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> 6
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In the World Time Mode, use1. Dto select the city code whose setting you
want to change.
Wait until the•nRight Dial Hands complete their move to the time in the
currently selected World Time City. You will not be able to perform step
2 of this procedure until the hands stop moving.
Hold down2. Afor about two seconds until the watch beeps. This will cause
the vLeft Dial Hand to toggle between DST (daylight saving time) and
STD (standard time).
Note that you cannot switch between•STD (standard time)/DST (daylight
saving time) while UTC is selected as the World Time City.
Note that the•STD (standard time)/DST (daylight saving time) setting
affects only the currently selected time zone. Other time zones are not
affected.
Swapping your Home City and World Time City
You can use the procedure below to swap your Home City and World Time City. This capability can come
in handy when you frequently travel between two locations in different time zones.
The following example shows what happens when the Home City and World
Time City are swapped while the Home City originally is TOKYO (TYO) and
the World Time City is NEW YORK (NYC).
Home City World Time City
Before swapping
TOKYO
10:08 p.m.
(Standard time)
NEW YORK
9:08 a.m.
(Daylight saving time)
After swapping
NEW YORK
9:08 a.m.
(Daylight saving time)
TOKYO
10:08 p.m.
(Standard time)
To swap your Home City and World Time City
In the World Time Mode, use1. Dto select the World Time City you want.
In this example, you would move the•xSecond Hand to NEW YORK
(NYC) in order to select New York as the World Time City.
Wait until the•nRight Dial Hands complete their move to the time in the
currently selected World Time City. You will not be able to perform step 2
of this procedure until the hands stop moving.
Hold down2. Bfor about three seconds until the watch beeps.
This will make the World Time City (•NEW YORK/NYC in this example) your new Home City. At
the same time, it will change the Home City you had selected prior to step 2 (TOKYO/TYO in this
example), to your World Time City.
After swapping the Home City and World Time City, the watch will stay in the World Time Mode. The•
xSecond Hand will point to your new World Time City (TOKYO/TYO in this example).
The•nRight Dial Hands will indicate the current time in your new World Time City
Note
If your current World Time City supports time calibration signal reception, making it your Home City•
enables calibration signal reception for that city.
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5
Operation Guide 5131 (OC)
Using the Alarm
When the alarm is turned on, an alarm will sound for about 10 seconds each day when the time in the
Timekeeping Mode reaches the preset alarm time. This is true even if the watch is not in the Timekeeping
Mode.
Hand Functions
x Second Hand: Indicates the current alarm ON/OFF setting.
v Left Dial Hand: Points to AL.
n Right Dial Hands: Indicate the current alarm time setting in 24-hour format.
To change the alarm time setting
Use1. Cto move the vLeft Dial Hand to AL.
Use2. D(+) and B(–) to change the alarm time setting.
Each press of either button will move the•nRight Dial Hands one minute.
Holding down•Dor Bwill start high-speed hand movement in the
applicable direction. To stop high-speed hand movement, press any
button.
The alarm always works based on the time kept in the Timekeeping Mode.•
The watch will return to the Timekeeping Mode automatically if you do not•
perform any operation in the Alarm Mode for about two or three minutes.
To turn the alarm on or off
In the Alarm Mode, press Ato toggle the alarm on and off. The xSecond Hand will indicate the current
ON/OFF setting.
To stop the alarm
Press any button.
Auto Correction of Hand Home Positions
Strong magnetism or impact can cause the hands and/or day setting to be off, even if the watch is able
to perform the signal receive operation. Auto correction of hand home positions correct the hand position
automatically.
Auto correction is performed in the Timekeeping Mode only.•
Auto correction corrects the positions of the•zHour Hand, cMinute Hand, and xSecond Hand. For
the dial hands and day, you must perform the manual adjustment procedure under “Adjusting Home
Positions Manually”.
Each hour, the watch performs automatic correction of the hand positions from –55 minutes to +5•
minutes.
You also can trigger auto correction of hand home positions manually, if you want. See “To trigger auto•
correction of hand home positions” for more information.
Auto correction of hand home positions can take up to three and a half minutes to complete.•
If hand positions are off by one hour or more, correct them using the procedure under “To trigger auto•
correction of hand home positions” or “Adjusting Home Positions Manually”.
To trigger auto correction of hand home positions
Perform the following procedure when the time setting is off.•
In the Timekeeping Mode, hold down Dfor about six seconds until the x
Second Hand completes one full revolution.
Though the•xSecond Hand will stop momentarily about three seconds after
you hold down D, do not release the button yet. Wait until the xSecond
Hand completes a full revolution before you release D.
To interrupt an ongoing correction operation and return to the Timekeeping•
Mode, press Dagain.
If you release•Dwhen the xSecond Hand stops the first time (after about
three seconds) in the above operation, the watch will enter the home position
adjustment mode, which is described under “Adjusting Home Positions
Manually”. If this happens, press Ato return to the Timekeeping Mode and
then perform the above operation again.
Manually triggered auto correction of hand home positions performs the•
following two steps.
The hands will move automatically in order to determine the home positions1.
of the watch.
After the hand home positions are determined, the watch will return to2.
normal timekeeping automatically. This completes the correction operation.
Adjusting Home Positions Manually
Strong magnetism or impact can cause the hands and/or day of the watch to be off, even if the watch
is able to perform the signal receive operation. If this happens, perform the applicable home position
adjustment procedures in this section.
Hand home position adjustment is not required if the time and day settings are correct.•
You also can use auto correction of the hand home positions to correct the home positions of the•z
Hour Hand, cMinute Hand, and xSecond Hand.
Note
Any time after you enter the home position adjustment mode in step 1 of the following procedure, you
can return to the Timekeeping Mode by pressing A. The watch also will return to the Timekeeping
Mode automatically if you do not perform any operation for about two or three minutes in the home
position adjustment mode. In either case, any adjustments you made before the watch returned to the
Timekeeping Mode will be applied.
To adjust home positions manually
Hold down1. Cat least two seconds until the watch beeps twice and enters
the Timekeeping Mode.
Hold down2. Dfor about three seconds until the watch beeps.
The watch is now in the home position adjustment mode.•
The watch will exit the adjustment mode automatically if you do not•
perform any operation for about two or three minutes.
First is•xSecond Hand home position adjustment.
If the•xSecond Hand moves to 12 o’clock, it is in the correct home
position. If it doesn’t, use Dto move it to 12 o’clock.
Each press of•Cin the home position adjustment mode will cycle through
the adjustment settings as shown below.
xSecond zHour/ cMinute/ b24-hour nRight Dial Hands
vLeft Dial Hand
mDay
After confirming that the3. xSecond Hand is at the proper home position, press C. This will switch to
zHour Hand and cMinute Hand home position adjustment.
The•zHour Hand and cMinute Hand are at their proper home positions if they both move to 12
o’clock. The bLower Dial Hand also will move along with zHour Hand movement, and cannot be
adjusted individually. If the hands are not positioned correctly, use D(+) and B(–) to move them
to their proper home positions.
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B +
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After confirming that the4. zHour Hand and cMinute Hand are in their
correct home positions, press C. This will switch to nRight Dial Hand
home position adjustment.
The•nRight Dial Hands are at their proper home positions if they both
move to 12 o’clock. If the hands are not positioned correctly, use D(+)
and B(–) to move them to 12 o’clock.
After confirming that the5. nRight Dial Hands are in the correct home
position, press C. This will advance to vLeft Dial Hand home position
adjustment.
The•vLeft Dial Hand is in the correct home position if it is pointing at 12
o’clock. If it isn’t, use D(+) and B(–) to move it to 12 o’clock.
After confirming that the6. vLeft Dial Hand is in the correct home position,
press C. This will advance to day home position adjustment.
The•mDay is in the correct home position if it shows 1. If it doesn’t, use
D(+) and B(–) to change the day to 1.
Press7. Ato return to the Timekeeping Mode.
The•mDay moves to the current day, and then the zHour Hand and
the cMinute Hand move to the current time. Wait until everything stops
moving.
Troubleshooting
Hand Movement and Position
 I lost track of what mode the watch is in.
Refer to “To select a mode”. To return directly to the Timekeeping Mode from any other mode, hold down
Cat least two seconds.
 The xSecond Hand is moving at two-second intervals.
 All the watch’s hands are stopped at 12 o’clock and none of the buttons work.
Power may be low. Expose the watch to light until the xSecond Hand starts moving normally, at one-
second intervals.
 The hands of the watch suddenly start moving at high speed, even when I do not perform any
operation.
This could be due to any one of the following causes. In all cases, the hand movement does not indicate
malfunction, and should stop shortly.
The watch is recovering from a sleep state.•
The time setting is being adjusted following a successful auto time calibration signal receive operation.•
The watch is returning to the Timekeeping Mode automatically from the Alarm Mode.•
 Hands suddenly stop moving. Button operation also is disabled.
The watch may be in the power recovery mode. Do not perform any operation until the hands return to
their normal positions (in about 15 minutes). The hands should return to their correct positions when
normal operation returns. To help power recover, leave the watch in a location where it is exposed to light.
 The current time setting is off by hours.
Your Home City setting may be wrong. Check your Home City setting and correct it, if necessary.
 The current time setting is off by one hour.
If you are using the watch in an area where time calibration signal reception is possible, see “To configure
Home City settings”.
If you are using in the watch in an area where time calibration signal reception is not possible, you may
need to change your Home City’s STD (standard time)/DST (daylight saving time) setting manually. Use
the procedure under “To toggle the Home City time between standard time and daylight saving time” to
change the STD/DST setting.
 The hands and/or day indications are off.
This could indicate that the watch has been exposed to magnetism or strong impact, which has caused
problems with proper hand and day alignment. Adjust the watch’s hand and day home position alignment.
World Time Mode
 The World Time indicated by the nRight Dial Hands in the World Time Mode is one hour off from
the actual time in the selected time zone.
The STD (standard time)/DST (daylight saving time) setting of the selected World Time City may be
wrong. Select the correct STD (standard time)/DST (daylight saving time) setting.
 The World Time indicated by the nRight Dial Hands in the World Time Mode is off.
Your Home City setting may be wrong. Check your Home City setting and correct it, if necessary.
Charging
 The watch does not resume operation after I expose it to light.
This can happen after the power level drops to Level 3. Continue exposing the watch to light until the x
Second Hand starts moving normally (at one-second intervals).
The xSecond Hand starts to move at one-second intervals, but then suddenly returns to moving
at two-second intervals.
The watch probably is not sufficiently charged yet. Continue keeping it exposed to light.
Time Calibration Signal
The information in this section applies only when LONDON (LON), PARIS (PAR), ATHENS (ATH),
HONOLULU (HNL), ANCHORAGE (ANC), LOS ANGELES (LAX), DENVER (DEN), CHICAGO (CHI),
NEW YORK (NYC), HONG KONG (HKG), or TOKYO (TYO) is selected as the Home City. You need to
adjust the current time manually when any other city is selected as the Home City.
 The xSecond Hand indicates NO (N) when I check the result of the latest receive operation.
Possible Cause Remedy
You are wearing or moving the watch, or performing a•
button operation during the signal receive operation.
The watch is in an area with poor reception•
conditions.
Keep the watch in an area where reception conditions
are good while the signal receive operation is being
performed.
You are in an area where signal reception is not
possible for some reason. See “Approximate Reception Ranges”.
The calibration signal is not being transmitted for some
reason.
Check the website of the organization that maintains•
the time calibration signal in your area for information
about its down times.
Try again later.•
 The current time setting changes after I set it manually.
You may have the watch configured for Auto Receive of the time calibration signal, which will cause the
time to be adjusted automatically according to your currently selected Home City. If this results in the
wrong time setting, check your Home City setting and correct it, if necessary.
 The current time setting is off by one hour.
Possible Cause Remedy
Signal reception on a day for switching between STD
(standard time)/DST (daylight saving) may have failed
for some reason.
Perform the operation under “To get ready for a
receive operation”. The time setting will be adjusted
automatically as soon as signal reception is successful.
If you are unable to receive the time calibration signal,
change the STD (standard time)/DST (daylight saving)
setting manually.
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6
Operation Guide 5131 (OC)
 Auto Receive is not performed or I cannot perform Manual Receive.
Possible Cause Remedy
The watch is in the Stopwatch Mode or Countdown
Timer Mode.
Auto Receive is not performed while the watch is in
the Stopwatch Mode or Countdown Timer Mode. Hold
down Cat least two seconds to enter the Timekeeping
Mode.
Your Home City setting is wrong. Check your Home City setting and correct it, if
necessary.
A countdown timer operation is in progress.
Both Auto Receive and Manual Receive are impossible
while a countdown is in progress. In the Countdown
Timer Mode, stop the timer operation and then return to
the Timekeeping Mode.
There is not enough power for signal reception. Expose the watch to light to charge it.
 Signal reception is being performed successfully, but the time and/or day is wrong.
Possible Cause Remedy
Your Home City setting is wrong. Check your Home City setting and correct it, if
necessary.
The watch may have been exposed to magnetism or
strong impact, which has caused problems with proper
hand and day alignment.
Adjust the watch’s hand and day home positions.
Specifications
Accuracy at normal temperature: ± 15 seconds a month (with no signal calibration)
Timekeeping: Hour, minutes (hand moves every 10 seconds), seconds, 24-hour, day, day of the week
Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099
Other: Home City code (can be assigned one of 29 city codes and Coordinated Universal Time);
Daylight Saving Time (summer time) / Standard Time
Time Calibration Signal Reception: Auto receive up to six times a day (5 times a day for the Chinese
calibration signal; Remaining auto receives cancelled as soon as one is successful);
Manual receive
Receivable Time Calibration Signals:
Mainflingen, Germany (Call Sign: DCF77, Frequency: 77.5 kHz); Anthorn, England (Call
Sign: MSF, Frequency: 60.0 kHz); Fukushima, Japan (Call Sign: JJY, Frequency: 40.0
kHz); Fukuoka/Saga, Japan (Call Sign: JJY, Frequency: 60.0 kHz); Fort Collins, Colorado,
the United States (Call Sign: WWVB, Frequency: 60.0 kHz); Shangqiu City, Henan
Province, China (Call Sign: BPC, Frequency: 68.5 kHz)
Countdown Timer:
Measuring unit: 1 second
Input range: 1 to 10 minutes (1-minute increments)
Other: Progress beeper; 5-minute preset reset time
Stopwatch: Measuring capacity: 23:59’59.95”
Measuring unit: 1/20 second
Measuring mode: Elapsed time, split time
World Time: 29 cities (29 time zones) and Coordinated Universal Time
Other: Standard Time/Daylight Saving Time (summer time); Home City/World Time City swapping
Alarm: Daily alarm
Other: Power Saving; Auto Correction of Hand Home Positions
Power Supply: Solar cell and one rechargeable battery
Approximate battery operating time: 5 months (no exposure to light after a full charge; 10 seconds
alarm beeper operation and one signal reception of approximately 4 minutes per day)
City Code Table
City Code City UTC Offset/
GMT Differential
PAGO PAGO (PPG) Pago Pago –11
HONOLULU (HNL) Honolulu –10
ANCHORAGE (ANC) Anchorage –9
LOS ANGELES (LAX) Los Angeles –8
DENVER (DEN) Denver –7
CHICAGO (CHI) Chicago –6
NEW YORK (NYC) New York –5
SANTIAGO (SCL) Santiago –4
RIO Rio De Janeiro –3
F. DE NORONHA (FEN) Fernando de Noronha –2
PRAIA (RAI) Praia –1
UTC 0
LONDON (LON) London
PARIS (PAR) Paris +1
ATHENS (ATH) Athens +2
City Code City UTC Offset/
GMT Differential
JEDDAH (JED) Jeddah +3
TEHRAN (THR) Tehran +3.5
DUBAI (DXB) Dubai +4
KABUL (KBL) Kabul +4.5
KARACHI (KHI) Karachi +5
DELHI (DEL) Delhi +5.5
DHAKA (DAC) Dhaka +6
YANGON (RGN) Yangon +6.5
BANGKOK (BKK) Bangkok +7
HONG KONG (HKG) Hong Kong +8
TOKYO (TYO) Tokyo +9
ADELAIDE (ADL) Adelaide +9.5
SYDNEY (SYD) Sydney +10
NOUMEA (NOU) Noumea +11
WELLINGTON (WLG) Wellington +12
•Based on data as of June 2009.
•The rules governing global times (UTC offset and GMT differential) and summer time are determined
by each individual country.