Casio 5381 User manual

Operation Guide 5381
E-9
Main Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-63
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-64
E-8
Using the Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-52
To set an alarm time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-52
To test the alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-53
To turn an alarm and the Hourly Time Signal on and off . . . . . . . . . . . . . . . . . E-54
To stop the alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-54
Illumination. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-55
To turn on illumination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-55
Adjusting Hand Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-57
Button Operation Tone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-59
To turn the button operation tone on and off . . . . . . . . . . . . . . . . . . . . . . . . . E-59
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-61
E-7
Using the Stopwatch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-46
To enter the Stopwatch Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-46
To perform an elapsed time operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-47
To pause at a split time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-47
To measure two finishes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-47
Countdown Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-49
To enter the Countdown Timer Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-49
To configure the countdown timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-50
To perform a countdown timer operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-51
To stop the alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-51
E-6
Thermometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-25
To take a temperature reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-25
To switch a temperature reading unit between Celsius (°C) and
Fahrenheit (°F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-26
Checking Tide Levels and Moon Ages (Tide/Moon) . . . . . . . . . . . . . . . . . . . . E-31
Counter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-41
Checking the Current Time in a Different Time Zone . . . . . . . . . . . . . . . . . . . E-42
To enter the World Time Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-43
To view the time in another time zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-43
To specify standard time or daylight saving time (DST) for a city. . . . . . . . . . . E-44
To swap your Home City and World Time City . . . . . . . . . . . . . . . . . . . . . . . . E-45
E-5
Contents
About This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-3
Things to check before using the watch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-4
Mode Reference Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-10
Timekeeping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-17
Configuring Home City Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-18
To configure Home City settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-18
To change the Daylight Saving Time (summer time) setting . . . . . . . . . . . . . . E-20
Adjusting the Digital Time and Date Settings . . . . . . . . . . . . . . . . . . . . . . . . . E-21
To configure the digital time and date settings . . . . . . . . . . . . . . . . . . . . . . . . E-21
E-4
Things to check before using the watch
1. Check the Home City and the daylight saving time (DST) setting.
Use the procedure under “To configure Home City settings” (page E-18) to configure
your Home City and daylight saving time settings.
Important!
•Proper World Time Mode data depend on correct Home City, time, and date
settings in the Timekeeping Mode. Make sure you configure these settings
correctly.
2. Set the current time.
•See “Adjusting the Digital Time and Date Settings” (page E-21).
The watch is now ready for use.
E-3
About This Manual
•Depending on the model of your watch, display text
appears either as dark figures on a light background, or
light figures on a dark background. All sample displays
in this manual are shown using dark figures on a light
background.
•Button operations are indicated using the letters shown
in the illustration.
•Note that the product illustrations in this manual are
intended for reference only, and so the actual product
may appear somewhat different than depicted by an
illustration.
E-2
Warning!
•The measurement functions built into this watch are not intended for taking
measurements that require professional or industrial precision. Values produced
by this watch should be considered as reasonable representations only.
•Note that the tide and Moon data calculated by this watch are approximate and
are intended as general information only. Never try to use it for marine navigation
or any other purposes requiring accurate measurements.
•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 your
watch or its malfunction.
E-1
ENGLISH
Congratulations upon your selection of this CASIO watch.
MA1402-EA © 2014 CASIO COMPUTER CO., LTD.

Operation Guide 5381
E-19
3. After the setting is the way you want, press 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.
* Coordinated Universal Time, the world-wide scientific standard of timekeeping.
The reference point for UTC is Greenwich, England.
E-18
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
1. In the Timekeeping Mode, hold down Auntil ADJ
appears.
•This indicates the city code setting mode.
•The hour and minute hands automatically move out of
the way at this time (page E-15).
2. Press D(East) and B(West) to select the city code
you want to use as your Home City.
•Keep pressing Dor Buntil the city code you want
to select as your Home City appears on the display.
•For details about city codes, see the “City Code
Table” at the back of this manual.
City Code
E-17
Timekeeping
Use the Timekeeping Mode to set and view the current
time and date.
•Each press of Acycles the digital display contents as
shown below.
Month-Day Day of the Week Seconds Hour : Minutes
A A A
PM indicator
A
Hour
Month-Day
Minutes
Tide indicator
(Page E-32)
E-16
2. Holding down Bagain as you press Cwill cause the hands to return to their
normal positions (normal timekeeping).
Note
•This operation can be performed in any mode. In the case of a setting mode
(setting flashing on the screen), the hands will move out of the way automatically,
even if you do not perform the above operation.
•Watch button functions are the same regardless of whether the hands are move
out of the way or at their normal positions.
•Changing to another mode will cause the hands to move back to their normal
positions.
•The hands also will move back to their normal positions automatically if no
operation is performed for about one hour.
E-15
Moving the Hands Out of the Way for Better Viewing
You can use the procedure below to temporarily move the hour and minute hands
out of the way to better view what is on the display.
1. While holding down B, press C.
•This will cause the hour and minute hands to move to a location where they do
not block your view of the tide indicator and/or digital display.
Example: When the current time is 8:20
Flashes while the hands are moved out of the way.
E-14
General Functions (All Modes)
The functions and operations described in this section can be used in all of the
modes.
•Auto Return Features
The watch will automatically return to the Timekeeping Mode if you do not perform
any operation for a certain amount of time, as described below.
Mode Approximate Elapsed Time
Thermometer, Alarm, Tide/Moon
2 to 3 minutes
Time or other setting mode
(information flashing on the display)
Tide Change After the tide change indication process is complete
•Scrolling
The Band Dbuttons are used on the setting mode to scroll through data on the
display. In most cases, holding down these buttons during a scroll operation scrolls
through the data at high speed.
E-13
Stopwatch Mode
Countdown Timer
Mode
World Time Mode
Alarm Mode
C
Counter Mode Tide/Moon Mode
C C
CCC
E-12
Selecting a Mode
•Press Cto cycle between the modes as shown below.
•To return to the Timekeeping Mode from any other mode, hold down Cfor about
two seconds.
•In any mode (except a setting mode), press Bto illuminate the display.
Timekeeping Mode
C
D
Thermometer
Mode
Tide Change
Mode
C
D*
* The mode that appears first is the one that was selected when you last used the Thermometer
or Tide Change mode.
E-11
To do this: Enter this mode: See:
Use the stopwatch to measure elapsed time Stopwatch Mode E-46
Use the countdown timer Countdown Timer Mode E-49
Set an alarm time Alarm Mode E-52
E-10
Mode Reference Guide
The mode you should select depends on what you want to do.
To do this: Enter this mode: See:
•View the current date in the Home City
•Configure Home City and daylight saving time (DST)
settings
•Configure time and date settings
•View the current tide level
Timekeeping Mode E-17
Take temperature readings Thermometer Mode E-25
View tide changes over the next 12 hours Tide Change Mode E-33
Count objects Counter Mode E-41
View tide level and moon age for a specified date
and time Tide/Moon Mode E-35
View the current time in one of 48 cities
(31 time zones) around the globe World Time Mode E-42

Operation Guide 5381
E-29
1. Enter the Thermometer Mode (page E-12).
2. Hold down Afor at least two seconds until the temperature
value disappears from the display.
•When you release Athe temperature value will start to flash.
•The hour and minute hands automatically move out of the way at
this time (page E-15).
3. Use D(+) and B(–) to calibrate the temperature value.
Calibration unit: 0.1°C (or 0.2°F)
Calibration range: –10.0 to 60.0°C (or 14.0 to 140.0°F)
Important!
•To cancel a temperature reading correction setting, hold down Dand Bat the
same time. The watch will beep.
4. Press Ato return to the Thermometer Mode.
E-28
Correcting the Temperature Reading
The temperature sensor of this watch is adjusted at the factory and so further
adjustment is not required by you. However, if you notice that the readings
produced by the watch are different from readings produced by another instrument,
you can use the procedure in this section to make corrections. You also can use
this procedure to clear a correction.
Important!
•The watch will not be able to produce correct temperature readings if you make a
mistake during the correction procedure. Check to make sure that the value you
use for correction produces correct temperature readings.
•Before performing the following procedure, remove the watch from your wrist and
leave it for about 20 or 30 minutes to allow the case temperature to become the
same as the air temperature.
E-27
3. Press C.
•This will cause the current measurement
unit to flash.
4. Use Dto select the measurement unit you
want.
5. Press Ato return to the Thermometer Mode.
Important!
•When TYO (TOKYO) is selected as the Home City, the temperature unit is set
automatically to Celsius (°C). These settings cannot be changed.
D
E-26
Measurement unit: 0.1°C (or 0.2°F)
Measurement range*: –10.0 to 60.0°C (or 14.0 to 140.0°F)
* --.- is displayed in place of the temperature when reading is outside the allowable
range.
2. Press Cto return to the Timekeeping Mode.
To switch a temperature reading unit between Celsius (°C) and Fahrenheit (°F)
1. Enter the Thermometer Mode (page E-12).
2. Hold down Afor at least two seconds until the temperature value disappears
from the display.
•When you release Athe temperature value will start to flash.
•The hour and minute hands automatically move out of the way at this time (page
E-15).
E-25
Thermometer
This watch uses a temperature sensor to take temperature readings.
•You can select either Celsius (°C) or Fahrenheit (°F) as the temperature
measurement unit (page E-26).
To take a temperature reading
1. In the Timekeeping Mode, press D. This will enter the
Thermometer Mode, which is indicated by TEMP on
the display.
•If TEMP does not appear when you press D, press
it again (page E-12).
•The temperature reading will appear about one
second after TEMP.
•The reading is updated at five-second intervals for two
to three minutes. After that, the watch automatically
returns to the Timekeeping Mode.
Temperature
E-24
Note
•Resetting the seconds to 00 while the current count is in the range of 30 to 59
causes the minutes to be increased by 1.
•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 battery replaced.
•The day of the week changes automatically when the date changes.
E-23
3. When the timekeeping setting you want to change is flashing, use Dand/or B
to change it as described below.
Screen To do this: Do this:
Toggle between 12-hour (12H) and 24-hour
(24H) timekeeping Press D.
Reset the seconds to 00 Press D.
Change the hour or minute Use D(+) and B(–).
Change the year Use D(+) and B(–).
Change the month or day Use D(+) and B(–).
4. Press Ato exit the setting mode.
E-22
2. Press Cto move the flashing in the sequence shown below to select the other
settings.
City Code
(page E-18)
CDST
(page E-20)
C
12/24-Hour Format
C
Seconds
C
CHour
C
Illumination Duration
(page E-55) Minutes
CC
Button Operation Tone On/Off
(page E-59) C
Day
C
Month
C
Year
E-21
Adjusting the Digital Time and Date Settings
Use the procedure below to adjust the digital time and date settings.
To configure the digital time and date settings
1. In the Timekeeping Mode, hold down Auntil ADJ
appears.
•This indicates the city code setting mode.
•The hour and minute hands automatically move out of
the way at this time (page E-15).
E-20
To change the Daylight Saving Time (summer time) setting
1. In the Timekeeping Mode, hold down Auntil ADJ
appears.
•This indicates the city code setting mode.
•The hour and minute hands automatically move out of
the way at this time (page E-15).
2. Press Cto display the DST setting mode.
3. Press Dto toggle between Daylight Saving Time (ON)
and Standard Time (OFF).
•Note that you cannot switch between daylight saving
time and standard time while UTC is selected as your
Home City.
4. After the setting is the way you want, press Ato
return to the Timekeeping Mode.
•The DST indicator appears to indicate that Daylight
Saving Time is turned on.
DST indicator

Operation Guide 5381
E-39
Calibrating High Tide Times
You can calibrate the high tide time with information you find on the Internet or in a
newspaper. This will allow the watch to display more accurate information.
•Note that the high tide time differs according to your location and the current
season.
1. In the Tide/Moon Mode, hold down Afor at least two
seconds.
•This will cause the high tide hour setting to start to
flash.
•The hour and minute hands automatically move out of
the way at this time (page E-15).
2. Use Cto move the flashing between the hour and
minute settings, and use Dand Bto change the
currently flashing digits.
•Set the time for the high tide on the date you selected
in the Tide/Moon Mode. If there are two high tides on
the selected date, set the time for the earlier one.
High tide time
Mode name
E-38
Note
•Calculation error for the Moon age is ±1 day.
•You can select any date between January 1, 2000 and December 31, 2099.
•If the tide indicator does not indicate the tide correctly, check the Timekeeping
Mode time and Home City settings. If there is no problem with the time and Home
City settings, refer to “Calibrating High Tide Times” (page E-39).
E-37
Checking Another Date’s Tide Level and Moon Age
1. Display the Tide/Moon Mode (Moon screen).
2. Use Dto scroll the date until the one you want is displayed.
•The first press of Dwill change to the date display. Next, each press of Dwill
advance the date by one.
•About one second after you display the desired date, the Moon age for that date
will appear on the display.
•Pressing Cto change to another mode returns the date to its initial setting
(today’s date).
3. Press Ato return to the tide screen.
•This will display the tide level at 6:00 a.m. on the day you selected in step2.
4. Press Dto change the time.
•This will display the tide level at the time you change to.
•Pressing Cto change to another mode returns the time and date to their initial
settings (6:00 a.m. today).
E-36
2. Use Dto scroll the time until the one you want is displayed.
•Each press of Dadvances the time by one hour and displays the tide level for
that time.
•Pressing Cto change to another mode returns the time to its initial setting
(6:00 a.m.).
3. Press Ato change to the Moon (Moon age) screen.
•This will display the Moon age of the current (today’s) date.
The tide hand moves to
12o’clock and stays there. Current date’s (today’s)
Moon age
Mode name
E-35
Checking Today’s Tide Level and Moon Age
1. In the Timekeeping Mode, press Ctwice to enter the Tide/Moon Mode (tide
screen).
•The display will change as shown below, and it will show the tide level for
6:00a.m. on the today’s date (June 30 in the example).
June 30
Tide level at 6:00 a.m.
Time (Initial: 6:00 a.m.)
Mode name Current date
•If you want to check the Moon age, advance to step3 of this procedure.
E-34
Current reading (10:08 p.m.)
12 hours
•The watch will return to the Timekeeping Mode after the tide change indication
routine is complete.
•You can return to the Timekeeping Mode while a tide change indication routine is in
progress by pressing C.
E-33
Note
•Except for the modes noted below, the current tide condition is displayed in all
other modes.
−Tide Change Mode (page E-33)
−Tide/Moon Mode (page E-35)
−Any setting mode (setting flashing on the screen)
Viewing Future Tide Changes
Your watch lets you view tide changes over the next 12 hours.
In the Timekeeping Mode, press D. This should cause
the screen shown nearby to appear on the display.
If this screen does not appear when you press D, press
it again (page E-12).
About one second after the screen appears, the watch
starts a tide change indication routine.
E-32
Viewing Current Tide Conditions
You can display current tide conditions in the Timekeeping Mode as shown below
(page E-12).
Tide (tide hand)
Low tideHigh tide
E-31
Checking Tide Levels and Moon Ages (Tide/Moon)
You can use the watch to check tide levels and Moon ages.
•Information is displayed for the currently selected Home Time City. You can also
check information for another city by changing to a different Home City (page E-18).
•Note that the tide and Moon information displayed by this watch is approximate
and is intended as general information only. Never try to use it for marine navigation
or any other purposes requiring accurate measurements.
E-30
Temperature Reading Precautions
Body temperature, direct sunlight, and humidity all have an effect on temperature
readings. To help ensure more accurate temperature readings, remove the watch
from your wrist, wipe it dry of any moisture, and place it in a well-ventilated location
not exposed to direct sunlight for about 20 to 30 minutes before taking temperature
readings.

Operation Guide 5381
E-49
Countdown Timer
The countdown timer can be set within a range of
one minute to 60minutes. An alarm sounds when the
countdown reaches zero.
To enter the Countdown Timer Mode
Use Cto select the Countdown Timer Mode as shown
on page E-13.
Minutes
Seconds
E-48
Note
•The Stopwatch Mode can indicate elapsed time up to 59minutes, 59seconds.
•Once started, stopwatch timing continues until you press Dto stop it, even if
you exit the Stopwatch Mode to another mode and even if timing reaches the
stopwatch limit defined above.
•Exiting the Stopwatch Mode while a split time is frozen on the display clears the
split time and returns to elapsed time measurement.
E-47
To perform an elapsed time operation
DD D D A
Start Stop (Resume) (Stop) Reset
To pause at a split time
D A A D A
Start Split
(SPL displayed)
Split release Stop Reset
To measure two finishes
DA D A A
Start Split
(SPL displayed)
First runner finishes.
Display time of first
runner.
Stop
Second runner
finishes.
Split release
Display time of
second runner.
Reset
E-46
Using the Stopwatch
The stopwatch measures elapsed time, split times, and two finishes.
To enter the Stopwatch Mode
Use Cto select the Stopwatch Mode as shown on
page E-13.
Minutes
Seconds
E-45
To swap your Home City and World Time City
In the World Time Mode, press Aand Bat the same time.
This swaps your Home City and World Time City.
Example: To swap the Home City (TYO) and World Time City (NYC)
A+B
World Time City
(NYC) time
2 seconds
New World Time
City (TYO)
TYO time
E-44
To specify standard time or daylight saving time (DST) for a city
1. In the World Time Mode, use D(East) to display the
city code (time zone) whose Standard Time/Daylight
Saving Time setting you want to change.
2. Hold down Afor about two seconds.
•This toggles the city code you selected in step1
between Daylight Saving Time (DST indicator
displayed) and standard time (DST indicator not
displayed).
•Note that you cannot switch between standard time/
daylight saving time (DST) while UTC is selected as
the World Time City.
•The standard time/daylight saving time (DST) setting
affects only the currently displayed city. Other cities
are not affected.
DST indicator
E-43
To enter the World Time Mode
Use Cto select the World Time Mode as shown on page E-13.
•The display changes as shown below.
1 second
(1) Mode name
2 seconds
D
(2) World Time City
city code
(3) World Time
City time
To view the time in another time zone
Press Dto display the currently selected city code. Pressing Dwithin two
seconds after the city code appears, changes the city code setting.
•Each press of Dadvances to the next city code.
•To change the city code to UTC, press Band Dat the same time.
•Press Ato display the city code and name of the currently selected city.
E-42
Checking the Current Time in a Different Time Zone
You can use the World Time Mode to view the current
time in one of 31 time zones (48 cities) around the globe.
The city that is currently selected in the World Time
Mode is called the “World Time City”.
•The hour, minute, and tide hands indicate information
for the currently selected Home City.
World Time City information
E-41
Counter
You can use the counter to count up to 999 objects or events.
1. In the Timekeeping Mode, press Cto enter the
Counter Mode (page E-13).
2. Use D(count up) and A(count down) to control
the count.
•To reset the count value to 000, hold down Afor at
least two seconds.
Count value
E-40
•To return the time setting to its initial default setting, press Dand Bat the
same time.
•Turning on summer time in the Timekeeping Mode, causes the high tide time
also to be advanced by one hour.
3. Press Ato complete the calibration process.
This returns to the tide screen.

Operation Guide 5381
E-59
Button Operation Tone
You can turn the button operation tone on or off as
desired.
•Even if you turn off the button operation tone, alarms,
the Hourly Time Signal, and other beepers all operate
normally.
To turn the button operation tone on and off
1. In the Timekeeping Mode, hold down Auntil ADJ
appears.
•This indicates the city code setting mode.
•The hour and minute hands automatically move out of
the way at this time (page E-15).
2. Press Cnine times to display the button operation tone On/Off screen (page E-22).
The screen will show either KEY or MUTE.
E-58
3. Press C.
•This enters the hour and minute hand adjustment
mode.
•Press Cagain* to enter the tide hand adjustment
mode.
*Nothing will happen if you press Cwhile the hands
are moving.
4. If the hour and minute hands are not at 12 o’clock,
use Dand Bto adjust them until they are.
5. Press Ato return to the Timekeeping Mode.
Check to make sure that the time indicated by the hands matches the time on the
digital display. If the times don’t match, perform the correction procedure above
again.
Hour hand and minute hand
E-57
Adjusting Hand Positions
The watch hands can go out of alignment with the time on the digital display if it
is exposed to strong magnetism or impact. If this happens, you should adjust the
hand positions.
Important!
•You do not need to perform the operation below as long as the analog hands
indicate the same time as the digital display.
1. Hold down Afor about five seconds until H.SET
appears.
•This indicates the tide hand adjustment mode.
•Though ADJ will appear as you hold down A, do not
release the button yet.
2. If the tide hand is not at 12 o’clock, use Dand Bto
adjust it until it is.
Tide hand
E-56
2. Press C10 times to display the illumination duration
setting screen (page E-22).
The screen will show either LT1 or LT3.
3. Press Dto toggle the illumination duration setting
between LT1 (1.5 seconds) and LT3 (3 seconds).
4. After all the settings are the way you want, press Ato
exit the setting screen.
E-55
Illumination
The face of the watch is illuminated for easy reading in the dark.
To turn on illumination
In any mode (except a setting mode), press Bto illuminate the display.
Illumination Precautions
•Illumination may be hard to see when viewed under direct sunlight.
•Illumination turns off automatically whenever an alarm sounds.
•Frequent use of illumination runs down the battery.
Changing the Illumination Duration
1. In the Timekeeping Mode, hold down Auntil ADJ appears.
•This indicates the city code setting mode.
•The hour and minute hands automatically move out of the way at this time (page
E-15).
E-54
To turn an alarm and the Hourly Time Signal on and off
1. In the Alarm Mode, use Dto select an alarm or the Hourly Time Signal.
•Each press of Dcycles between the alarm time screen and the hourly time
signal SIG setting screen.
2. Press Ato toggle the displayed setting (alarm or hourly time signal) between
on and off.
To stop the alarm
Press any button.
E-53
2. Hold down Afor about two seconds until the alarm time starts to flash. This is
the setting mode.
•The hour and minute hands automatically move out of the way at this time (page
E-15).
3. Press Cto move the flashing between the hour and minute settings.
4. While a setting is flashing, use D(+) and B(–) to change it.
5. Press Ato exit the setting mode.
To test the alarm
In the Alarm Mode, hold down Dto sound the alarm.
E-52
Using the Alarm
The watch beeps for about 10 seconds when the alarm
time is reached. The hourly time signal causes the watch
to beep every hour on the hour.
To set an alarm time
1. Use Cto select the Alarm Mode as shown on page E-13.
•This will cause the display to change as shown below.
•If SIG appears on the display, press D.
1 second
Mode name
Alternates
Alarm time ON/OFF
E-51
To perform a countdown timer operation
DD D D A
Start Stop (Resume) (Stop) Reset
•Before starting a countdown timer operation, check to make sure that a
countdown operation is not in progress (indicated by the seconds counting down).
If it is, press Dto stop it and then Ato reset to the countdown start time.
To stop the alarm
Press any button.
E-50
To configure the countdown timer
1. While the countdown start time is on the display in
the Countdown Timer Mode, hold down Auntil the
current countdown start time starts to flash, which
indicates the setting mode.
•The hour and minute hands automatically move out of
the way at this time (page E-15).
•If the countdown start time is not displayed, use the
procedure under “To perform a countdown timer
operation” (page E-51) to display it.
2. Use D(+) and B(–) to change the setting.
•You can set a start time in the range of 1 to 60 minutes in 1-minute increments.
3. Press Ato exit the setting mode.

Operation Guide 5381
L-3
City
Code City name
UTC Offset/
GMT Differential
DXB DUBAI +4
KBL KABUL +4.5
KHI KARACHI +5
DEL DELHI +5.5
KTM KATHMANDU +5.75
DAC DHAKA +6
RGN YANGON +6.5
BKK BANGKOK +7
SIN SINGAPORE
+8
HKG HONG KONG
BJS BEIJING
TPE TAIPEI
SEL SEOUL +9
TYO TOKYO
ADL ADELAIDE +9.5
GUM GUAM +10
SYD SYDNEY
City
Code City name
UTC Offset/
GMT Differential
NOU NOUMEA +11
WLG WELLINGTON +12
*As of December 2013, the official UTC
offset for Moscow, Russia (MOW) has
been changed from +3 to +4, but this
watch still uses an offset of +3 (the old
offset) for MOW. Because of this, you
should leave the summer time setting
turned on (which advances the time
by one hour) for the MOW time.
• This table shows the city codes of
this watch.
• The rules governing global times
(UTC offset and GMT differential) and
summer time are determined by each
individual country.
L-2
City Code Table
City
Code City name
UTC Offset/
GMT Differential
PPG PAGO PAGO –11
HNL HONOLULU –10
ANC ANCHORAGE –9
YVR VANCOUVER –8
LAX LOS ANGELES
YEA EDMONTON –7
DEN DENVER
MEX MEXICO CITY –6
CHI CHICAGO
NYC NEW YORK –5
SCL SANTIAGO –4
YHZ HALIFAX
YYT ST. JOHN’S –3.5
RIO
RIO DE JANEIRO –3
FEN F. DE NORONHA –2
City
Code City name
UTC Offset/
GMT Differential
RAI PRAIA –1
UTC
0LIS LISBON
LON LONDON
MAD MADRID
+1
PAR PARIS
ROM ROME
BER BERLIN
STO STOCKHOLM
ATH ATHENS
+2CAI CAIRO
JRS JERUSALEM
MOW* MOSCOW +3
JED JEDDAH
THR TEHRAN +3.5
L-1
City Code Table
E-66
Other: Button operation tone on/off; Moving the Hands to View the Digital Display
Power Supply: Two silver oxide batteries (Type: SR726W)
Approximate battery operating time: 2 years under the following conditions:
•1 illumination operation (1.5 seconds) per day
•Alarm: 10 seconds/day
•Temperature readings: Once/week
Frequent use of illumination runs down the battery.
E-65
Tide/Moon: Tide (tide hand), Moon age
Tide change indication, time/date selection
Counter: 0 to 999
World Time: 48 cities (31 time zones)
Other: Daylight Saving Time/Standard Time
Stopwatch:
Measuring unit: 1 second
Measuring capacity: 59'59"
Measuring modes: Elapsed time, split time, two finishes
Countdown Timer:
Measuring unit: 1 second
Countdown range: 60 minutes
Countdown start time setting range: 1 to 60 minutes (1-minute increments)
Alarms: Daily alarm; Hourly time signal
Illumination: LED (light-emitting diode); Selectable illumination duration
(approximately 1.5 seconds or 3 seconds)
E-64
Specifications
Accuracy at normal temperature: ±30 seconds a month
Digital Timekeeping: Hour, minutes, seconds, p.m. (P), month, day, day of the
week
Time format: 12-hour and 24-hour
Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099
Other: Home City code (can be assigned one of 48 city codes);
Standard Time/Daylight Saving Time (summer time)
Analog Timekeeping: Hour, minutes (hand moves every 20seconds)
Thermometer:
Measurement and display range: –10.0 to 60.0°C (or 14.0 to 140.0°F)
Display unit: 0.1°C (or 0.2°F)
Measurement timing: Every five seconds in the Thermometer Mode
Other: Calibration; Selectable measurement unit
Temperature Sensor Precision:
±2°C (±3.6°F) in range of –10 to 60°C (14.0 to 140.0°F)
E-63
Main Indicators
Number Name See
1
1
Tide Indicator E-32
2
2
PM indicator E-17
3
3
Hands shifted indicator E-15
4
4
DST indicator E-20, E-44
5
5
Temperature unit E-26
1 2
4
3
5
E-62
■Why does “ERR” appear while a sensor operation is in progress?
Subjecting the watch to strong impact can cause sensor malfunction or improper
contact of internal circuitry. When this happens, ERR (error) will appear on the
display and sensor operations will be disabled.
•If ERR appears while a measurement operation is being performed in a sensor
mode, restart the measurement. If ERR appears on the upper display again, it can
mean there is something wrong with the sensor.
•If ERR keeps appearing during measurement, it could mean there is a problem
with the applicable sensor.
World Time Mode
■The time for my World Time City is off in the World Time Mode.
This could be due to incorrect switching between standard time and daylight saving
time. See “To specify standard time or daylight saving time (DST) for a city” (page E-44)
for more information.
E-61
Troubleshooting
Time Setting
■The current time setting is off by hours.
Your Home City setting may be wrong (page E-18). Check your Home City setting and
correct it, if necessary.
■The current time setting is off by one hour.
You may need to change your Home City’s standard time/daylight saving time
(DST) setting. Use the procedure under “Adjusting the Digital Time and Date
Settings” (page E-21) to change the standard time/daylight saving time (DST) setting.
Sensor modes
■Why can’t I change the temperature unit setting?
The temperature unit setting is always Celsius (°C) whenever TOKYO is selected as
the Home City. In this case, the setting cannot be changed.
E-60
3. Press Dto toggle the setting between KEY (ON) and MUTE (OFF).
4. After all the settings are the way you want, press Ato exit the setting screen.