Casio 5381 Operation Guide

MA1402-EA

© 2014 CASIO COMPUTER CO., LTD.

Operation Guide 5381

• 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-2

Warning!

Things to check before using the watch

1. Check the Home City and the daylight saving time (DST) setting.

Use the procedure under “To confi gure Home City settings” (page E-18) to confi gure
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.

Congratulations upon your selection of this CASIO watch.

About This Manual

ENGLISH

• Depending on the model of your watch, display text

appears either as dark fi gures on a light background, or
light fi gures on a dark background. All sample displays
in this manual are shown using dark fi gures 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.

Contents

About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-3

Things to check before using the watch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-4

Mode Reference Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-10

Timekeeping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-17

Confi guring Home City Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-18

To confi gure 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 confi gure the digital time and date settings . . . . . . . . . . . . . . . . . . . . . . . . E-21

E-1

E-3

E-4

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-6

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-8

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 fi nishes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-47

Countdown Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-49

To enter the Countdown Timer Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-49

To confi gure the countdown timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-50

To perform a countdown timer operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-51

To stop the alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-51

Main Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-63

Specifi cations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-64

E-5

E-7

E-9

Operation Guide 5381

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

• Confi gure Home City and daylight saving time (DST)

settings

• Confi gure time and date settings

• View the current tide level

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 specifi ed date
and time

View the current time in one of 48 cities
(31 time zones) around the globe

E-10

Selecting a Mode

• Press C to cycle between the modes as shown below.

• To return to the Timekeeping Mode from any other mode, hold down C for about

two seconds.

• In any mode (except a setting mode), press B to illuminate the display.

Thermometer

Mode

* The mode that appears fi rst is the one that was selected when you last used the Thermometer

or Tide Change mode.

E-12

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.

Thermometer, Alarm, Tide/Moon

Time or other setting mode
(information fl ashing on the display)

Tide Change After the tide change indication process is complete

• Scrolling

The B and D buttons 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-14

Mode Approximate Elapsed Time

D

Tide Change

Mode

2 to 3 minutes

Timekeeping Mode E-17

Tide/Moon Mode E-35

World Time Mode E-42

Timekeeping Mode

C

D*

C

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

Counter Mode Tide/Moon Mode

C

Countdown Timer

Alarm Mode

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.

Mode

World Time Mode

C C

Stopwatch Mode

CCC

E-11

E-13

E-15

2. Holding down B again as you press C will 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 fl ashing 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-16

Confi guring 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 confi gure Home City settings

1. In the Timekeeping Mode, hold down A until 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.

City Code

E-18

• Keep pressing D or B until 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.

Timekeeping

Minutes

Hour

Month-Day

Tide indicator
(Page E-32)

3. After the setting is the way you want, press A to 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 scientifi c standard of timekeeping.

The reference point for UTC is Greenwich, England.

Use the Timekeeping Mode to set and view the current
time and date.

• Each press of A cycles the digital display contents as

shown below.

Month-Day Day of the Week Seconds Hour : Minutes

A A A

PM indicator

A

E-17

E-19

Operation Guide 5381

To change the Daylight Saving Time (summer time) setting

DST indicator

1. In the Timekeeping Mode, hold down A until 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 C to display the DST setting mode.

3. Press D to 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 A to

return to the Timekeeping Mode.

• The DST indicator appears to indicate that Daylight

Saving Time is turned on.

E-20

2. Press C to move the fl ashing in the sequence shown below to select the other

settings.

City Code

(page E-18)

C

C

Button Operation Tone On/Off

E-22

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-24

C

Illumination Duration

(page E-55)

(page E-59)

DST

(page E-20)

C

C

12/24-Hour Format

Day

C

Month

C

Seconds

C

Hour

C

Minutes

C

Year

C

Adjusting the Digital Time and Date Settings

Use the procedure below to adjust the digital time and date settings.

To confi gure the digital time and date settings

3. When the timekeeping setting you want to change is fl ashing, use D and/or B

to change it as described below.

Screen To do this: Do this:

1. In the Timekeeping Mode, hold down A until 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).

Toggle between 12-hour (12H) and 24-hour
(24H) timekeeping

Reset the seconds to 00

Change the hour or minute

Change the year

Change the month or day

Press D.

Press D.

Use D (+) and B (–).

Use D (+) and B (–).

Use D (+) and B (–).

4. Press A to exit the setting mode.

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

Temperature

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 fi ve-second intervals for two

to three minutes. After that, the watch automatically
returns to the Timekeeping Mode.

E-21

E-23

E-25

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 C to 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 A for at least two seconds until the temperature value disappears

from the display.

• When you release A the temperature value will start to fl ash.

• The hour and minute hands automatically move out of the way at this time (page

E-15).

E-26

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-28

D

3. Press C.

• This will cause the current measurement

unit to fl ash.

4. Use D to select the measurement unit you

want.

5. Press A to 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.

1. Enter the Thermometer Mode (page E-12).

2. Hold down A for at least two seconds until the temperature

value disappears from the display.

• When you release A the temperature value will start to fl ash.

• 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 D and B at the

same time. The watch will beep.

4. Press A to return to the Thermometer Mode.

E-27

E-29

Operation Guide 5381

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.

E-30

Viewing Current Tide Conditions

You can display current tide conditions in the Timekeeping Mode as shown below
(page E-12).

Low tideHigh tide

Tide (tide hand)

E-32

Current reading (10:08 p.m.)

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.

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 fl ashing on the screen)

Viewing Future Tide Changes

Your watch lets you view tide changes over the next 12 hours.

Checking Today’s Tide Level and Moon Age

1. In the Timekeeping Mode, press C twice 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).

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.

Mode name Current date

E-31

E-33

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-34

2. Use D to scroll the time until the one you want is displayed.

• Each press of D advances the time by one hour and displays the tide level for

that time.

• Pressing C to change to another mode returns the time to its initial setting

(6:00 a.m.).

3. Press A to 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.

E-36

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-38

Mode name

Current date’s (today’s)
Moon age

June 30
Tide level at 6:00 a.m.

Time (Initial: 6:00 a.m.)

• If you want to check the Moon age, advance to step3 of this procedure.

E-35

Checking Another Date’s Tide Level and Moon Age

1. Display the Tide/Moon Mode (Moon screen).

2. Use D to scroll the date until the one you want is displayed.

• The fi rst press of D will change to the date display. Next, each press of D will

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 C to change to another mode returns the date to its initial setting

(today’s date).

3. Press A to 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 D to change the time.

• This will display the tide level at the time you change to.

• Pressing C to change to another mode returns the time and date to their initial

settings (6:00 a.m. today).

E-37

Calibrating High Tide Times

You can calibrate the high tide time with information you fi nd 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.

Mode name

High tide time

1. In the Tide/Moon Mode, hold down A for at least two

seconds.

• This will cause the high tide hour setting to start to

fl ash.

• The hour and minute hands automatically move out of

the way at this time (page E-15).

2. Use C to move the fl ashing between the hour and
minute settings, and use D and B to change the
currently fl ashing 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.

E-39

Operation Guide 5381

• To return the time setting to its initial default setting, press D and B at 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 A to complete the calibration process.

This returns to the tide screen.

E-40

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-42

To specify standard time or daylight saving time (DST) for a city

DST indicator

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 A for 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.

Counter

You can use the counter to count up to 999 objects or events.

Count value

To enter the World Time Mode

Use C to select the World Time Mode as shown on page E-13.

• The display changes as shown below.

To view the time in another time zone

Press D to display the currently selected city code. Pressing D within two
seconds after the city code appears, changes the city code setting.

• Each press of D advances to the next city code.

• To change the city code to UTC, press B and D at the same time.

• Press A to display the city code and name of the currently selected city.

To swap your Home City and World Time City

In the World Time Mode, press A and B at the same time.
This swaps your Home City and World Time City.

Example: To swap the Home City (TYO) and World Time City (NYC)

1. In the Timekeeping Mode, press C to 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 A for at

least two seconds.

(1) Mode name

World Time City
(NYC) time

1 second

(2) World Time City

A+B

New World Time
City (TYO)

2 seconds

D

city code

2 seconds

(3) World Time

City time

TYO time

E-41

E-43

E-44

Using the Stopwatch

The stopwatch measures elapsed time, split times, and two fi nishes.

To enter the Stopwatch Mode

Use C to select the Stopwatch Mode as shown on
page E-13.

Seconds

Minutes

E-46

Note

• The Stopwatch Mode can indicate elapsed time up to 59minutes, 59seconds.

• Once started, stopwatch timing continues until you press D to stop it, even if

you exit the Stopwatch Mode to another mode and even if timing reaches the
stopwatch limit defi ned 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-48

To perform an elapsed time operation

D

Start Stop (Resume) (Stop) Reset

To pause at a split time

D A A D A

Start Split

To measure two fi nishes

D

Start Split

D D D A

(SPL displayed)

A D A A

(SPL displayed)
First runner fi nishes.
Display time of fi rst
runner.

Split release Stop Reset

Stop

Second runner
fi nishes.

Split release

Display time of
second runner.

Reset

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 C to select the Countdown Timer Mode as shown
on page E-13.

Seconds

Minutes

E-45

E-47

E-49

Operation Guide 5381

To confi gure the countdown timer

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 A to exit the setting mode.

E-50

1. While the countdown start time is on the display in

the Countdown Timer Mode, hold down A until the
current countdown start time starts to fl ash, 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.

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 C to 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

E-52

To turn an alarm and the Hourly Time Signal on and off

1. In the Alarm Mode, use D to select an alarm or the Hourly Time Signal.

• Each press of D cycles between the alarm time screen and the hourly time

signal SIG setting screen.

2. Press A to toggle the displayed setting (alarm or hourly time signal) between

on and off.

To stop the alarm

Press any button.

E-54

Alternates

Alarm time ON/OFF

To perform a countdown timer operation

D

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 D to stop it and then A to reset to the countdown start time.

To stop the alarm

Press any button.

2. Hold down A for about two seconds until the alarm time starts to fl ash. This is

the setting mode.

• The hour and minute hands automatically move out of the way at this time (page

E-15).

3. Press C to move the fl ashing between the hour and minute settings.

4. While a setting is fl ashing, use D (+) and B (–) to change it.

5. Press A to exit the setting mode.

To test the alarm

In the Alarm Mode, hold down D to sound the alarm.

D D D A

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 B to 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 A until 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-51

E-53

E-55

2. Press C 10 times to display the illumination duration

setting screen (page E-22).

The screen will show either LT1 or LT3.

3. Press D to 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 A to

exit the setting screen.

E-56

Hour hand and minute hand

5. Press A to 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.

E-58

3. Press C.

• This enters the hour and minute hand adjustment

mode.

• Press C again* to enter the tide hand adjustment

mode.

* Nothing will happen if you press C while the hands

are moving.

4. If the hour and minute hands are not at 12 o’clock,

use D and B to adjust them until they are.

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.

Tide hand

1. Hold down A for about fi ve 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 D and B to

adjust it until it is.

E-57

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 A until 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 C nine times to display the button operation tone On/Off screen (page E-22).

The screen will show either KEY

or MUTE.

E-59

Operation Guide 5381

1
2
3
4
5

3. Press D to toggle the setting between KEY (ON) and MUTE (OFF).

4. After all the settings are the way you want, press A to exit the setting screen.

E-60

■ 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-62

Specifi cations

Accuracy at normal temperature: ±30 seconds a month
Digital Timekeeping: Hour, minutes, seconds, p.m. (P), month, day, day of the

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 fi ve 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-64

week

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-61

Main Indicators

1 2

Tide/Moon: Tide (tide hand), Moon age

Counter: 0 to 999
World Time: 48 cities (31 time zones)

Stopwatch:

Countdown Timer:

Alarms: Daily alarm; Hourly time signal
Illumination: LED (light-emitting diode); Selectable illumination duration

Tide change indication, time/date selection

Other: Daylight Saving Time/Standard Time

Measuring unit: 1 second
Measuring capacity: 59'59"
Measuring modes: Elapsed time, split time, two fi nishes

Measuring unit: 1 second
Countdown range: 60 minutes
Countdown start time setting range: 1 to 60 minutes (1-minute increments)

(approximately 1.5 seconds or 3 seconds)

Number Name See

Tide Indicator E-32

1

PM indicator E-17

2

Hands shifted indicator E-15

3

DST indicator E-20, E-44

4

3
4

Temperature unit E-26

5

5

E-63

E-65

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-66

City Code Table

City

City name

Code

PPG PAGO PAGO –11

HNL HONOLULU –10

ANC ANCHORAGE –9

YVR VANCOUVER
LAX LOS ANGELES

YEA EDMONTON
DEN DENVER
MEX MEXICO CITY

CHI CHICAGO

NYC NEW YORK –5

SCL SANTIAGO

YHZ HALIFAX

YYT ST. JOHN’S –3.5

RIO DE JANEIRO

RIO

FEN

F. DE NORONHA

L-2

UTC Offset/

GMT Differential

–8

–7

–6

–4

–3
–2

City

City name

Code

RAI PRAIA –1

UTC

LON LONDON
MAD MADRID
PAR PARIS
ROM ROME
BER BERLIN
STO STOCKHOLM
ATH ATHENS

JRS JERUSALEM

MOW* MOSCOW

JED JEDDAH

THR TEHRAN +3.5

UTC Offset/

GMT Differential

0LIS LISBON

+1

+2CAI CAIRO

+3

City Code Table

City

City name

Code

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

HKG HONG KONG

BJS BEIJING
TPE TAIPEI
SEL SEOUL
TYO TOKYO
ADL ADELAIDE +9.5

GUM GUAM

SYD SYDNEY

UTC Offset/

GMT Differential

+10

L-1

City

City name

Code

NOU NOUMEA +11
WLG WELLINGTON +12

* As of December 2013, the offi cial 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

+8

+9

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.

UTC Offset/

GMT Differential

L-3