Casio ECB-40YDB

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User Manual

This is the main product document for model ECB-40YDB.

The file format is pdf, 30 pages, you can download this manual here .

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Contents
Precautions
Operating Precautions
User Maintenance
Battery Replacement
Mobile Link Precautions
Before Getting Started...
General Guide
Watch Face and Display Indicators
Mode Hand
Navigating Between Modes
Cycling Between Timekeeping Mode Digital
Display Contents
Shifting Hands to Read the Digital Display
Viewing the Face in the Dark
Useful Features
Linking with a Phone
Getting Ready
Auto Time Adjustment
Using the Schedule Timer
Viewing Stopwatch Data
Configuring Timer Settings
Setting the Alarm
Configuring World Time Settings
Adjusting Hand Alignment
Phone Finder
Configuring Watch Settings
Changing the Home City Summer Time Setting
Connection
Connecting with a Phone
Unpairing
If you purchase another phone
Time Adjustment
Using Watch Operations to Adjust the Time
Setting
Using the Watch in a Medical Facility or
Aircraft
World Time
Using CASIO WATCHES to Configure World
Time City Settings
Checking World Time
World Time City Setting
Swapping Your Home Time and World Time
Alarm
Using CASIO WATCHES to Configure Alarm
Settings
Configuring Alarm Settings
Enabling the Hourly Time Signal
Turning Off an Alarm or the Hourly Time Signal
Moving to Another Time Zone
Stopwatch
Lap Times
Measuring Elapsed Time
Measuring Lap Times
Example: Recording a Race Lap Time
Timer
Using CASIO WATCHES to Configure Timer
Settings
Setting the Countdown Start Time
Using the Timer
Hand Alignment Adjustment
Using CASIO WATCHES to Adjust Hand
Alignment
Adjusting Hand Alignment
Other Settings
Changing the Date Display Format
Specifying the Day of the Week Language
Enabling or Disabling the Schedule Timer
Notification Sound
Enabling the Button Operation Tone
Resetting Watch Settings
Other Information
City Table
Summer Time Table
Supported Phones
Specifications
Copyrights and Registered Copyrights
Troubleshooting
Watch Operation Guide 5708
1
MA2212-EA
OPUM-H
© 2023 CASIO COMPUTER CO., LTD.
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Precautions
Operating Precautions
Water Resistance
The information below applies to watches
with WATER RESIST or WATER
RESISTANT marked on the back cover.
Water Resistance Under Daily Use
Marking on watch front or on
back cover
No BAR
mark
Example of Daily Use
Hand washing, rain Yes
Water-related work, swimming No
Windsurfing No
Skin diving No
Enhanced Water Resistance Under Daily
Use
5 Atmospheres
Marking on watch front or on
back cover
5BAR
Example of Daily Use
Hand washing, rain Yes
Water-related work, swimming Yes
Windsurfing No
Skin diving No
10 Atmospheres
Marking on watch front or on
back cover
10BAR
Example of Daily Use
Hand washing, rain Yes
Water-related work, swimming Yes
Windsurfing Yes
Skin diving Yes
20 Atmospheres
Marking on watch front or on
back cover
20BAR
Example of Daily Use
Hand washing, rain Yes
Water-related work, swimming Yes
Windsurfing Yes
Skin diving Yes
Do not use your watch for scuba diving or
other types of diving that requires air tanks.
Watches that do not have WATER RESIST
or WATER RESISTANT marked on the
back cover are not protected against the
effects of sweat. Avoid using such a watch
under conditions where it will be exposed to
large amounts of sweat or moisture, or to
direct splashing with water.
Even if a watch is water resistant, note the
usage precautions described below. Such
types of use reduce water resistance
performance and can cause fogging of the
glass.
ー 
Do not operate the crown or buttons while
your watch is submersed in water or wet.
ー 
Avoid wearing your watch while in the
bath.
ー 
Do not wear your watch while in a heated
swimming pool, sauna, or any other high
temperature/high humidity environment.
ー 
Do not wear your watch while washing
your hands or face, while doing
housework, or while performing any other
task that involves soaps or detergents.
After submersion in seawater, use plain
water to rinse all salt and dirt from your
watch.
To maintain water resistance, have the
gaskets of your watch replaced periodically
(about once every two or three years).
A trained technician will inspect your watch
for proper water resistance whenever you
have its battery replaced. Battery
replacement requires the use of special
tools. Always request battery replacement
from your original retailer or from an
authorized CASIO service center.
Some water-resistant watches come with
fashionable leather bands. Avoid
swimming, washing, or any other activity
that causes direct exposure of a leather
band to water.
The inside surface of the watch glass may
fog when the watch is exposed to a sudden
drop in temperature. No problem is
indicated if the fogging clears up relatively
quickly. Sudden and extreme temperature
changes (such as coming into an air
conditioned room in the summer and
standing close to an air conditioner outlet,
or leaving a heated room in the winter and
allowing your watch to come into contact
with snow) can cause it to take longer for
glass fogging to clear up. If glass fogging
does not clear up or if you notice moisture
inside of the glass, immediately stop using
your watch and take it to your original
retailer or to an authorized CASIO service
center.
Your water-resistant watch has been tested
in accordance with International
Organization for Standardization
regulations.
Band
Tightening the band too tightly can cause
you to sweat and make it difficult for air to
pass under the band, which can lead to skin
irritation. Do not fasten the band too tightly.
There should be enough room between the
band and your wrist so you can insert your
finger.
Deterioration, rust, and other conditions can
cause the band to break or come off of your
watch, which in turn can cause band pins to
fly out of position or to fall out. This creates
the risk of your watch falling from your wrist
and becoming lost, and also creates the risk
of personal injury. Always take good care of
your band and keep it clean.
Immediately stop using a band if you even
notice any of the following: loss of band
flexibility, band cracks, band discoloration,
band looseness, band connecting pin flying
or falling out, or any other abnormality. Take
your watch to your original retailer or to a
CASIO service center for inspection and
repair (for which you will be charged) or to
have the band replaced (for which you will
be charged).
Watch Operation Guide 5708
2
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Temperature
Never leave your watch on the dashboard
of a car, near a heater, or in any other
location that is subject to very high
temperatures. Do not leave your watch
where it will be exposed to very low
temperatures. Temperature extremes can
cause your watch to lose or gain time, to
stop, or otherwise malfunction.
Leaving your watch in an area hotter than
+60 °C (140 °F) for long periods can lead to
problems with its LCD. The LCD may
become difficult to read at temperatures
lower than 0 °C (32 °F) and greater than
+40 °C (104 °F).
Impact
Your watch is designed to withstand impact
incurred during normal daily use and during
light activity such as playing catch, tennis,
etc. Dropping your watch or otherwise
subjecting it to strong impact, however, can
lead to malfunction. Note that watches with
shock-resistant designs (G-SHOCK,
BABY-G, G-MS) can be worn while
operating a chain saw or engaging in other
activities that generate strong vibration, or
while engaging in strenuous sports
activities (motocross, etc.)
Magnetism
The hands of analog and combination
(analog-digital) watches are moved by a
motor that uses magnetic force. When such
a watch is close to a device (audio
speakers, magnetic necklace, cell phone,
etc.) that emits strong magnetism, the
magnetism can cause timekeeping to slow
down, speed up, or stop, resulting in the
incorrect time being displayed.
Very strong magnetism (from medical
equipment, etc.) should be avoided
because it can cause malfunction of your
watch and damage to electronic
components.
Electrostatic Charge
Exposure to very strong electrostatic
charge can cause your watch to display the
wrong time. Very strong electrostatic
charge even can damage electronic
components.
Electrostatic charge can cause the display
to go blank momentarily or cause a rainbow
effect on the display.
Chemicals
Do not allow your watch to come into
contact with thinner, gasoline, solvents,
oils, or fats, or with any cleaners, adhesives,
paints, medicines, or cosmetics that contain
such ingredients. Doing so can cause
discoloration of or damage to the resin
case, resin band, leather, and other parts.
Storage
If you do not plan to use your watch for a
long time, thoroughly wipe it free of all dirt,
sweat, and moisture, and store it in a cool,
dry place.
Resin Components
Allowing your watch to remain in contact
with other items or storing it together with
other items for long periods while it is wet
can cause color on resin components to
transfer to the other items, or the color of the
other items to transfer to the resin
components of your watch. Be sure to dry
off your watch thoroughly before storing it
and make sure it is not in contact with other
items.
Leaving your watch where it is exposed to
direct sunlight (ultraviolet rays) for long
periods or failure to clean dirt from your
watch for long periods can cause it to
become discolored.
Friction caused by certain conditions
(strong external force, sustained rubbing,
impact, etc.) can cause discoloration of
painted components.
If there are printed figures on the band,
strong rubbing of the printed area can cause
discoloration.
Leaving your watch wet for long periods can
cause fluorescent color to fade. Wipe the
watch dry as soon as possible after it
becomes wet.
Semi-transparent resin parts can become
discolored due to sweat and dirt, and if
exposed to high temperatures and humidity
for long periods.
Daily use and long-term storage of your
watch can lead to deterioration, breaking, or
bending of resin components. The extent of
such damage depends on usage conditions
and storage conditions.
Leather Band
Allowing your watch to remain in contact
with other items or storing it together with
other items for long periods while it is wet
can cause the color of the leather band to
transfer to the other items or the color of the
other items to transfer to the leather band.
Be sure to dry off your watch thoroughly with
a soft cloth before storing it and make sure
it is not in contact with other items.
Leaving a leather band where it is exposed
to direct sunlight (ultraviolet rays) for long
periods or failure to clean dirt from a leather
band for long periods can cause it to
become discolored.
CAUTION:
Exposing a leather band to rubbing or dirt
can cause color transfer and discoloration.
Metal Components
Failure to clean dirt from metal components
can lead to formation of rust, even if
components are stainless steel or plated. If
metal components exposed to sweat or
water, wipe thoroughly with a soft,
absorbent cloth and then place the watch in
a well-ventilated location to dry.
Use a soft toothbrush or similar tool to scrub
the metal with a weak solution of water and
a mild neutral detergent, or with soapy
water. Next, rinse with water to remove all
remaining detergent and then wipe dry with
a soft absorbent cloth. When washing metal
components, wrap the watch case with
kitchen plastic wrap so it does not come into
contact with the detergent or soap.
Watch Operation Guide 5708
3
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Bacteria and Odor Resistant Band
The bacteria and odor resistant band
protects against odor generated by the
formation of bacteria from sweat, which
ensures comfort and hygiene. In order to
ensure maximum bacteria and odor
resistance, keep the band clean. Use an
absorbent soft cloth to thoroughly wipe the
band clean of dirt, sweat, and moisture. A
bacteria and odor resistant band
suppresses the formation of organisms and
bacteria. It does not protect against rash
due to allergic reaction, etc.
Liquid Crystal Display
Display figures may be difficult to read when
viewed from an angle.
Watch with Data Memory
Allowing the battery to go dead, replacing
the battery, or having your watch repaired
can cause all data in watch memory to be
lost. Note that CASIO Computer Co., Ltd.
assumes no responsibility for any damages
or losses caused by data lost due to
malfunction or repair of your watch,
replacement of the battery, etc. Be sure to
keep separate written copies of all
important data.
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.
User Maintenance
Caring for Your Watch
Remember that you wear your watch next to
your skin, just like a piece of clothing. To
ensure your watch performs at the level for
which it is designed, keep it clean by
frequently wiping with a soft cloth to keep your
watch and band free of dirt, sweat, water and
other foreign matter.
Whenever your watch is exposed to sea
water or mud, rinse it off with clean fresh
water.
For a metal band or a resin band with metal
parts, use a soft toothbrush or similar tool to
scrub the band with a weak solution of water
and a mild neutral detergent, or with soapy
water. Next, rinse with water to remove all
remaining detergent and then wipe dry with
a soft absorbent cloth. When washing the
band, wrap the watch case with kitchen
plastic wrap so it does not come into contact
with the detergent or soap.
For a resin band, wash with water and then
wipe dry with a soft cloth. Note that
sometimes a smudge like pattern may
appear on the surface of a resin band. This
will not have any effect on your skin or
clothing. Wipe with a cloth to remove the
smudge pattern.
Clean water and sweat from a leather band
by wiping with a soft cloth.
Not operating a watch crown, buttons, or
rotary bezel could lead to later problems
with their operation. Periodically rotate the
crown and rotary bezel, and press buttons
to maintain proper operation.
Dangers of Poor Watch Care
Rust
Though the metal steel used for your watch
is highly rust-resistant, rust can form if your
watch is not cleaned after it becomes dirty.
ー 
Dirt on your watch can make it impossible
for oxygen to come into contact with the
metal, which can lead to breakdown of
the oxidization layer on the metal surface
and the formation of rust.
Rust can cause sharp areas on metal
components and can cause band pins to fly
out of position or to fall out. If you ever notice
any abnormality immediately stop using
your watch and take it to your original
retailer or to an authorized CASIO service
center.
Even if the surface of the metal appears
clean, sweat and rust in crevasses can soil
the sleeves of clothing, cause skin irritation,
and even interfere with watch performance.
Premature Wear
Leaving sweat or water on a resin band or
bezel, or storing your watch an area subject
to high moisture can lead to premature
wear, cuts, and breaks.
Skin Irritation
Individuals with sensitive skin or in poor
physical condition may experience skin
irritation when wearing a watch. Such
individuals should keep their leather band
or resin band particularly clean. Should you
ever experience a rash or other skin
irritation, immediately remove your watch
and contact a skin care professional.
Watch Operation Guide 5708
4
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Battery Replacement
Leave battery replacement up to your
original retailer or authorized CASIO
service center.
Have the battery replaced only with the type
specified in the “Specifications”. Use of a
different battery type can cause
malfunction.
When replacing the battery, also request a
check for proper water resistance.
Ornamental resin components may
become worn, cracked, or bent over time
when subjected to normal daily use. Note
that if cracking or any other abnormality
indicating possible damage is noticed in a
watch submitted for battery replacement,
your watch will be returned with an
explanation of the abnormality, without the
requested servicing being performed.
Initial Battery
The battery that comes loaded in your watch
when you purchase it is used for function
and performance testing at the factory.
The test battery may go dead quicker than
the normally rated battery life noted in the
“Specifications”. Note that you will be
charged for replacement of this battery,
even if replacement is required within your
watch’s warranty period.
Low Battery Power
Low battery power is indicated by large
timekeeping error, by dim display contents,
or by a blank display.
Operation while battery power is low can
result in malfunction. Replace the battery as
soon as possible.
Mobile Link Precautions
Legal Precautions
This watch complies with or has received
approval under the radio laws of various
countries and geographical areas. Using
this watch in an area where it does not
comply with or has not received approval
under applicable radio laws may be a
criminal offense. For details, visit the CASIO
Website.
https://world.casio.com/ce/BLE/
Use of this watch inside of aircraft is
restricted under the aviation laws of each
country. Be sure to follow the instructions of
airline personnel.
Precautions when using Mobile Link
When using this watch in combination with
a phone, keep the watch and phone close
to each other. A range of two meters is
recommended as a guideline, but the local
environment (walls, furniture, etc.), the
structure of a building, and other factors
may require a much closer range.
This watch can be affected by other devices
(electrical devices, audio-visual equipment,
office equipment, etc.) In particular, it can
be affected by operation of a microwave
oven. The watch may not be able to
communicate normally with a phone if a
microwave oven is operating nearby.
Conversely, this watch may cause noise in
radio reception and the video image of a TV.
Bluetooth of this watch uses the same
frequency band (2.4 GHz) as wireless LAN
devices, and use of such devices in close
proximity of this watch may result in radio
interference, slower communication
speeds and noise for the watch and the
wireless LAN device, or even
communication failure.
Stopping Radio Wave Emission by This
Watch
The
e
on the display indicates that the watch
is emitting radio waves.
When in a hospital, on an aircraft, or in any
other area where the use of radio waves is not
allowed, use the operation below to stop radio
wave generation.
Enter the watch Airplane Mode
l
Using the Watch in a Medical Facility or
Aircraft
Watch Operation Guide 5708
5
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Before Getting
Started...
This section provides an overview of the watch
and introduces convenient ways it can be
used.
Watch Features
Phone Linking
The watch supports connection and
communication with a Bluetooth capable
phone.
World Time
Display the current time in any one of 38
time zones* around the globe.
* Subject to being updated when
connected with a phone.
Alarm
An alarm sounds whenever a time specified
by you is reached.
Stopwatch
The stopwatch measures elapsed time in
1/1000-second units for the first hour, and
in 1/10-second units after that for up to 24
hours.
Timer
Countdown from a start time specified by
you. An alarm sounds when the countdown
reaches zero.
Note
The illustrations included in this
operation guide have been created to
facilitate explanation. An illustration
may differ somewhat from the item it
represents.
General Guide
③④
A Hour hand
B LCD
C Mode hand
Graphic display area operation is linked
with operations in each watch mode.
D Minute hand
A button
Press to turn on illumination.
B button
Pressing this button in the Timekeeping Mode
cycles between displays.
C button
Each press cycles between watch modes.
In any mode, hold down this button for at least
two seconds to return to the Timekeeping
Mode.
D button
Pressing this button while any setting screen
is displayed will change the setting.
Watch Face and Display
Indicators
①②
A Displayed while the watch is indicating
summer time.
B Flashes while the watch’s hands are
shifted for easier reading.
C Displayed while Auto Light is enabled.
D Displayed while the Airplane Mode is
enabled.
E Displayed while the hourly time signal is
enabled.
F Displayed while an alarm is turned on.
G Displayed during p.m. times while 12-hour
timekeeping is being used.
H Displayed while there is connection
between the watch and a phone.
I Mode hand movement depends on the
current watch mode.
J In the World Time Mode, the mode hand
points to [WT].
K In the Alarm Mode, the mode hand points
to [AL].
Watch Operation Guide 5708
6
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Battery Replacement
When battery power goes low, will start
to flash and some functions will become
disabled. If continues to flash, replace
the battery.
Request battery replacement from a CASIO
service center or your original retailer.
If [R] is flashing on the display
If [R] is flashing, it means that all functions,
except for timekeeping, are disabled due to
high momentary battery power consumption.
l
[R] is flashing on the digital display.
Mode Hand
Mode hand movement depends on the
current watch mode.
In the Alarm Mode and World Time Mode,
the mode hand indicates the current mode.
World Time Mode
Alarm Mode
Mode hand
Timekeeping Mode
In the Timekeeping Mode, the mode hand
indicates the number of minutes remaining in
the currently ongoing event. The mode hand
points to [OVER] when there are more than
120 minutes remaining.
If you do not have scheduled events which will
finish within 24 hours, the mode hand points
to [00].
l
Using the Schedule Timer
Stopwatch Mode
In the Stopwatch Mode, the mode hand
indicates the lap time seconds.
Timer Mode
In the Timer Mode, the mode hand indicates
the minutes, which are also shown on the
digital display.
Navigating Between Modes
Each press of (C) cycles between watch
modes.
In any mode, hold down (C) for at least two
seconds to return to the Timekeeping
Mode.
CC
C
C
C
World Time Mode
Timekeeping Mode
Stopwatch Mode
Timer Mode
Alarm Mode
Mode hand
Watch Operation Guide 5708
7
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Cycling Between
Timekeeping Mode Digital
Display Contents
Each press of (B) in the Timekeeping Mode
cycles the display information as shown
below.
Month, day
Day of week
Hours, minutes
Seconds
Seconds
Month, day
Press (D) to display the Schedule Timer.
l
Using the Schedule Timer
Shifting Hands to Read the
Digital Display
Hand shift moves the hands out of the way for
easy viewing of display information.
1. While holding down (A), press (C).
This will shift the analog hands to allow
easy viewing of display information.
2. To return the hands to their normal
timekeeping positions, hold down (A) as
you press (C) again or press (C) to change
to another mode.
Note
If you leave the watch with its hands
shifted and do not perform any
operation for about one hour, the
hands will resume normal timekeeping
automatically.
Viewing the Face in the Dark
The watch has an LED light that you can turn
on for reading in the dark.
To illuminate the face manually
Press (A) to turn on illumination.
Illumination will turn off automatically if an
alarm starts to sound.
To illuminate the face when Auto Light
is enabled
If Auto Light is enabled, face illumination will
turn on automatically whenever the watch is
positioned at an angle of 40 degrees or more.
40
degrees
or more
Important!
Auto Light may not operate properly
when the watch is at a horizontal angle
of 15 degrees or greater from
horizontal as shown in the illustration
below.
Electro-static charge or magnetism
can interfere with proper auto light
operation. If this happens, try lowering
your arm and then angle it towards
your face again.
When moving the watch you may note
a slight rattling sound. This is due to
operation of the auto light switch,
which determines the current
orientation of the watch. It does not
indicate malfunction.
Note
Auto Light is disabled when any one of
the conditions below exists.
ー 
Alarm, timer alert, or other beeper
sounding
Watch Operation Guide 5708
8
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Configuring the Auto Light Setting
1. Enter the Timekeeping Mode.
l
Navigating Between Modes
2. Hold down (B) for at least two seconds.
Release the button when the name of the
currently selected Home City appears on
the display.
This is the setting mode. The hands
automatically shift out of the way for
easy viewing of the display and other
indicators.
Home City
3. Press (C) 13 times to display [AUTO].
4. Press (D) to toggle Auto Light between
enable and disable.
[ON]: Illumination turns on when the watch
is angled towards the face.
[OFF]: Illumination does not turn on when
the watch is angled towards the face.
5. Press (B) to complete the setting
operation.
[LT] is displayed while Auto Light is
enabled.
If you do not disable it manually, Auto
Light remains enabled for
approximately six hours. After that, it
becomes disabled automatically.
On
Note
While the setting is being configured,
the watch will exit the setting operation
automatically after about two or three
minutes of non-operation.
Specifying the Illumination Duration
You can select either 1.5 seconds or three
seconds as the illumination duration.
1. Enter the Timekeeping Mode.
l
Navigating Between Modes
2. Hold down (B) for at least two seconds.
Release the button when the name of the
currently selected Home City appears on
the display.
This is the setting mode. The hands
automatically shift out of the way for
easy viewing of the display and other
indicators.
Home City
3. Press (C) 14 times to display [LIGHT].
4. Press (D) to select an illumination
duration.
[1]: 1.5-second illumination
[3]: 3-second illumination
5. Press (B) to exit the setting screen.
Note
While the setting is being configured,
the watch will exit the setting operation
automatically after about two or three
minutes of non-operation.
Useful Features
Pairing the watch with your phone makes a
number of the watch’s features easier to use.
Auto time adjustment
l
Auto Time Adjustment
12:30
Selection of More Than 300 World Time
cities
l
Configuring World Time Settings
Stopwatch Data Transfer to the Phone
l
Viewing Stopwatch Data
In addition, a number of other watch settings
can be configured using your phone.
To transfer data to a watch and to
configure settings, you first need to pair
the watch with your phone.
l
Getting Ready
Your phone needs to have the CASIO
“CASIO WATCHES” app installed to pair
with the watch.
Watch Operation Guide 5708
9
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Linking with a Phone
While there is a Bluetooth connection
between the watch and phone (Mobile Link),
the watch’s current time setting is adjusted
automatically. You can also change the
watch’s other settings.
Note
This function is available only while
CASIO WATCHES is running on the
phone.
This section describes watch and
phone operations.
X
: Watch operation
Y
: Phone operation
Getting Ready
To use your watch in combination with a
phone, you first need to pair them. Perform the
steps below to pair the watch with a phone.
A
Install the app on your phone.
In Google Play or the App Store, search for the
“CASIO WATCHES” phone app and install it
on your phone.
B
Configure Bluetooth settings.
Enable the phone’s Bluetooth.
Note
For details about setting procedures,
see your phone documentation.
C
Pair the watch with a phone.
Before you can use the watch in combination
with a phone, you first need to pair them.
1. Move the phone to be paired with close to
(within one meter of) the watch.
2.
Y
Tap the “CASIO WATCHES” icon.
Tap on the “My Watch” tab. Next,
select the applicable product name.
3.
X
Hold down (D) for at least two seconds.
Release the button when [CNCT]
changes from high speed flashing to slow
flashing.
4.
Y
Perform the operation shown on the
screen of the phone to be paired with.
[OK] is shown on the display while there
is a connection between the watch and
phone.
If pairing fails for some reason, [ERR]
appears on the display momentarily
and then the watch returns to the
Timekeeping Mode. Perform the pairing
procedure again from the beginning.
Pairing complete
Pairing started
Note
The first time you start up CASIO
WATCHES phone app, a message will
appear on your phone asking if you
want to enable location information
acquisition. Configure settings to allow
background use of location
information.
Auto Time Adjustment
Your watch can connect with your phone to
adjust the watch’s time setting.
If you leave your watch in the Timekeeping
Mode, it will perform the adjustment operation
automatically as you go about your daily life,
without any operation required by you.
12:30
Important!
The watch may not be able to perform
auto time adjustment under the
conditions described below.
ー 
While the watch is too far away from
its paired phone
ー 
While communication is not possible
due to radio interference, etc.
ー 
While the phone is updating its
system
ー 
While the CASIO WATCHES phone
app is not running on the phone
Note
If the watch does not indicate the
correct time even if is able to connect
with a phone, adjust the hand
positions.
l
Adjusting Hand Alignment
If there is a World Time City specified
with the CASIO WATCHES phone
app, its time will also be adjusted
automatically.
Auto time adjustment is performed at
the times described below.
ー 
After your phone’s time zone or
summer time setting is changed
ー 
After 24 hours or more have passed
since the last time adjustment using
Bluetooth connection
ー 
After 24 hours or more have passed
since city swapping using CASIO
WATCHES or watch operation
ー 
After 24 hours or more have passed
since the last home city change or
time adjustment using watch
operation
Watch operation can be performed
even while it is connected with your
phone.
Watch Operation Guide 5708
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Triggering Immediate Time Adjustment
The watch’s time setting is adjusted
automatically whenever you pair it with a
phone. Whenever you want to adjust the
watch’s time setting based on your phone’s
time, perform the procedure below to connect
with a phone.
1.
X
Enter the Timekeeping Mode.
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Navigating Between Modes
2. Move the phone close to (within one meter
of) the watch.
3.
X
Hold down (D) for at least two seconds.
[CNCT] flashes to indicate that the watch
has started the connection operation.
Once the watch and phone are
connected, [OK] appears, and then the
watch adjusts its time setting based on
information from the phone.
After time
adjustment
Trying to connect
Note
Connection with your phone is not
possible while the watch’s Airplane
Mode is enabled. To connect with your
phone, disable the Airplane Mode.
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Using the Watch in a Medical
Facility or Aircraft
The watch remains connected with
your phone even after time adjustment
is complete.
If time adjustment fails for some
reason, [ERR] appears.
Using the Schedule Timer
The schedule timer can be linked with the
calendar of a paired phone, so the watch can
display the remaining time of the currently
ongoing scheduled event and/or its ending
time.
Important!
The schedule timer becomes disabled
if you manually adjust the watch’s time
setting. Before using the Schedule
Timer, connect the watch with your
phone and sync their time settings.
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Connecting with a Phone
Note
The schedule timer corresponds to the
built-in calendar of your phone’s OS
and Google calendar.
When a scheduled start time or end
time is reached, the watch will beep
and display an indication for one or two
seconds.
You can enable or disable the beep
sound as required.
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Enabling or Disabling the
Schedule Timer Notification
Sound
Up to five scheduled events can be
sent from your phone to the watch.
Transferring Scheduled Event
Scheduled events can be transferred from
your phone to the watch.
While the watch is connected with your
phone, scheduled events are periodically
transferred to the watch automatically.
Check the connection
Make sure the
e
symbol is shown on the
watch display when you perform the
procedure below. If
e
is not displayed,
refer to the information at the link below.
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Connecting with a Phone
1.
Y
Tap the “CASIO WATCHES” icon.
2.
Y
Perform the operation shown on the
phone screen to transfer phone
scheduled events to the watch.
Displaying an Scheduled Event
1.
X
Enter the Timekeeping Mode.
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Navigating Between Modes
2.
X
Press (D).
This causes the display to change from
the current time to an event.
Each press of (B) switches between the
information as described below.
Next scheduled
event start time
Current ongoing
scheduled event end time
The mode hand indicates the time
remaining until the currently ongoing
event is complete. The mode hand
points to [OVER] when the remaining
time exceeds 120 minutes.
If you do not have scheduled events
which will finish within 24 hours, the
mode hand points to [00].
Mode hand
When a scheduled start time or end time
is reached, the watch will beep and
display an indication for one or two
seconds.
You can enable or disable the beep
sound as required.
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Enabling or Disabling the Schedule
Timer Notification Sound
When the remaining time of the
currently ongoing scheduled event is 10
minutes or less, the watch display
shows the remaining time, and counts it
down in one-second units.
Watch Operation Guide 5708
11
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Viewing Stopwatch Data
This section explains how to send lap times
(up to 200 records) from watch memory to
your phone, and view it on your phone for with
CASIO WATCHES.
Sending Stopwatch Data to a Phone
Use the procedure below to send data from
the watch to a phone.
While the watch is connected with your
phone, lap times being recorded by the
watch are periodically transferred to the
phone automatically.
Check the connection
Make sure the
e
symbol is shown on the
watch display when you perform the
procedure below. If
e
is not displayed,
refer to the information at the link below.
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Connecting with a Phone
1.
Y
Tap the “CASIO WATCHES” icon.
2.
Y
Perform the operation shown on the
phone screen to transfer data measured
by the watch to the phone.
After data transfer is complete, a list of the
measurement data will appear on the
phone display.
Tapping a stopwatch data item displays
its details.
Checking a Lap Time
Use CASIO WATCHES to check the data you
sent to the phone.
1.
Y
Tap the “CASIO WATCHES” icon.
2.
Y
Perform the operation shown on the
phone screen to view the measurement
data you want.
Note
Tapping “Edit” displays a screen that
you can use to change the data item
title and to delete lap time data.
Configuring Timer Settings
Check the connection
Make sure the
e
symbol is shown on the
watch display when you perform the
procedure below. If
e
is not displayed,
refer to the information at the link below.
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Connecting with a Phone
1.
Y
Tap the “CASIO WATCHES” icon.
2.
Y
Perform the operation shown on the
phone screen to configure the timer time
setting.
Setting the Alarm
Check the connection
Make sure the
e
symbol is shown on the
watch display when you perform the
procedure below. If
e
is not displayed,
refer to the information at the link below.
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Connecting with a Phone
1.
Y
Tap the “CASIO WATCHES” icon.
2.
Y
Perform the operation shown on the
phone screen to configure alarm time
settings.
Configuring World Time
Settings
Specifying a World Time City with the CASIO
WATCHES phone app causes the watch’s
World Time City to change accordingly.
Settings can be configured to perform auto
summer time switching for the World Time
City.
Check the connection
Make sure the
e
symbol is shown on the
watch display when you perform the
procedure below. If
e
is not displayed,
refer to the information at the link below.
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Connecting with a Phone
Note
The CASIO WATCHES phone app
World Time lets you select from among
approximately 300 cities as the World
Time City.
Watch Operation Guide 5708
12
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To select a World Time City
1.
Y
Tap the “CASIO WATCHES” icon.
2.
Y
Perform the operation shown on the
phone screen. The World Time setting will
be reflected on the watch.
Note
You can use the CASIO WATCHES
phone app to configure settings for
user cities that are not included in the
watch’s built-in World Time Cities. You
must use the CASIO WATCHES
phone app to select a user city as your
World Time City.
Configuring the Summer Time Setting
1.
Y
Tap the “CASIO WATCHES” icon.
2.
Y
Perform the operation shown on the
phone screen to select a summer time
setting.
“Auto”
The watch switches between standard
time and summer time automatically.
“OFF”
The watch always indicates standard
time.
“ON”
The watch always indicates summer
time.
Note
While the summer time setting is
“Auto”, the watch will switch between
standard time and summer time
automatically. You do not need to
switch between standard time and
summer time manually. Even if you are
in an area that does not observe
summer time, you can leave the
watch’s summer time setting as “Auto”.
For information about summer time
periods, refer to the “Summer Time
Table” or CASIO WATCHES.
Swapping Your World Time and Home
Time
1.
Y
Tap the “CASIO WATCHES” icon.
2.
Y
Perform the operation shown on the
phone screen to swap your Home Time
with your World Time.
Note
Auto time adjustment does not work for
24 hours after swapping of the Home
Time and World Time.
Adjusting Hand Alignment
If the hands are out of alignment even though
the watch is connected with your phone, use
CASIO WATCHES to adjust them.
Check the connection
Make sure the
e
symbol is shown on the
watch display when you perform the
procedure below. If
e
is not displayed,
refer to the information at the link below.
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Connecting with a Phone
1.
Y
Tap the “CASIO WATCHES” icon.
2.
Y
Perform the operation shown on the
phone screen to correct hand alignment.
Phone Finder
You can use phone finder to trigger a tone on
the phone to make it easy to find. The tone is
forced to sound even if the phone is in vibrate
mode.
Important!
Phone finder will not sound the tone
unless the CASIO WATCHES phone
app is running on the phone.
Do not use this function in areas where
phone call tones are restricted.
The tone sounds at a high volume. Do
not use this function when listening to
phone output over earphones.
1.
X
If the watch is in any mode besides the
Timekeeping Mode, hold down (C) for at
least two seconds to enter the
Timekeeping Mode.
2.
X
Hold down (D) for at least five seconds.
The phone will sound a tone when it
establishes a connection with the watch.
It will take a few seconds before the
phone tone sounds.
Sounding phone
alert sound
Getting ready to
connect with phone
3.
X
Press any button to stop the tone.
You can press any watch button to stop
the phone tone only during the first 30
seconds after it starts to sound.
Note
Connection with your phone is not
possible while the watch’s Airplane
Mode is enabled. To connect with your
phone, disable the Airplane Mode.
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Using the Watch in a Medical
Facility or Aircraft
Watch Operation Guide 5708
13
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Configuring Watch Settings
You can use CASIO WATCHES to specify the
interval for acquiring the latest schedule from
your phone, to enable or disable the watch
operation tone, and to configure other
settings.
Check the connection
Make sure the
e
symbol is shown on the
watch display when you perform the
procedure below. If
e
is not displayed,
refer to the information at the link below.
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Connecting with a Phone
1.
Y
Tap the “CASIO WATCHES” icon.
2.
Y
Select the setting you want to change
and then perform the operation shown on
the phone screen.
Changing the Home City
Summer Time Setting
Check the connection
Make sure the
e
symbol is shown on the
watch display when you perform the
procedure below. If
e
is not displayed,
refer to the information at the link below.
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Connecting with a Phone
1.
Y
Tap the “CASIO WATCHES” icon.
2.
Y
Perform the operation shown on the
phone screen to change your Home City
summer time setting.
Connection
Connecting with a Phone
Your watch can connect with a phone that is
paired with it.
If the watch is not paired with the phone you
want to connect with, refer to the information
below and pair them.
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C
Pair the watch with a phone.
Connecting with a Phone
If
e
does not appear on the watch display even
though it is paired with your phone, hold down
(D) for at least two seconds to connect with
your phone.
Once the watch and phone are connected,
the connection is maintained.
Important!
If you have problems establishing a
connection, it could mean that CASIO
WATCHES is not running on your
phone. On the phone’s home screen,
tap the “CASIO WATCHES” icon. After
the app starts up, hold down the
watch’s (D) button for at least two
seconds.
Unpairing
Unpairing the watch from a phone requires
both CASIO WATCHES phone app and watch
operations.
Note
If you are using an iPhone, also delete
the pairing information stored on the
phone.
Deleting Pairing Information from the
CASIO WATCHES phone app
1.
Y
Tap the “CASIO WATCHES” icon.
2.
Y
Perform the operation shown on the
phone screen to unpair.
Deleting Pairing Information from the
Watch
1.
X
Hold down (C) for at least two seconds
to enter the Timekeeping Mode.
2.
X
Hold down (B) for at least two seconds.
Release the button when the name of the
currently selected Home City appears on
the display.
This is the setting mode. The hands
automatically shift out of the way for
easy viewing of the display and other
indicators.
Home City
3.
X
Press (C) three times.
This causes the seconds to flash.
Seconds
Watch Operation Guide 5708
14
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4.
X
Hold down (A) for at least two seconds.
Release when [CLR] stops flashing.
This deletes the pairing information from
the watch.
5.
X
Press (B) to return to the Timekeeping
Mode.
Note
While the setting is being configured,
the watch will exit the setting operation
automatically after about two or three
minutes of non-operation.
iPhone Only
Deleting the phone’s pairing
information
For details about setting procedures, see your
phone documentation.
“Settings”
n
“Bluetooth”
n
Cancel the
watch’s device registration.
If you purchase another phone
You need to perform the pairing operation
whenever you want to establish a Bluetooth
connection with a phone for the first time.
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Deleting Pairing Information from the
Watch
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C
Pair the watch with a phone.
Time Adjustment
Your watch can connect with a phone to obtain
information that it uses to adjust its date and
time setting.
Important!
When you are on an aircraft or in any
other location where radio signals area
may cause problems, enable the
watch’s Airplane Mode to disable
connection with your phone.
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Using the Watch in a Medical
Facility or Aircraft
Referring to the information below, configure
the time setting in accordance with the method
that suits your own lifestyle.
Do you use a phone?
Time adjustment by connecting with your
phone is recommended.
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Getting Ready
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Auto Time Adjustment
12:30
If your phone cannot connect with the
watch
You can adjust time settings by
performing operations on the watch.
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Using Watch Operations to Adjust the
Time Setting
Using Watch Operations to
Adjust the Time Setting
If your watch cannot connect with a phone for
some reason, you can use watch operations
to adjust date and time settings.
Setting a Home City
Use the procedure in this section to select a
city to use as your Home City. If you are in an
area that observes summer time, you can also
configure a summer time setting.
Note
The initial factory default summer time
setting for all cities is [AUTO]. In many
cases, the [AUTO] setting lets you use
the watch without switching between
summer time and standard time.
While the setting is being configured,
the watch will exit the setting operation
automatically after about two or three
minutes of non-operation.
1. Enter the Timekeeping Mode.
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Navigating Between Modes
2. Hold down (B) for at least two seconds.
Release the button when the name of the
currently selected Home City appears on
the display.
This is the setting mode. The hands
automatically shift out of the way for
easy viewing of the display and other
indicators.
Home City
3. Use (A) and (D) to change the Home City
setting.
Holding down (A) or (D) scrolls through
settings at high speed.
For details refer to the information
below.
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City Table
Watch Operation Guide 5708
15
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4. Press (C).
5. Use (D) to select a summer time setting.
Each press of (D) cycles through available
settings in the sequence shown below.
[AUTO]
The watch switches between standard
time and summer time automatically.
[OFF]
The watch always indicates standard
time.
[ON]
The watch always indicates summer
time.
6. Press (B) to complete the setting
operation.
Setting the Time/Date
1. Enter the Timekeeping Mode.
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Navigating Between Modes
2. Hold down (B) for at least two seconds.
Release the button when the name of the
currently selected Home City appears on
the display.
This is the setting mode. The hands
automatically shift out of the way for
easy viewing of the display and other
indicators.
Home City
3. Keep pressing (C) until the setting you
want to change is flashing.
Each press of (C) moves the flashing to
the next setting in the sequence shown
below.
Summer time
Home City
Minute
Hour
Second
Illumination duration
Auto Light enable/disable
Day
Month
Ye a r
12/24-hour timekeeping
Date display format
Day of the week language
Operation tone enable/disable
Airplane Mode on/off
Schedule notification tone on/off
4. Configure the date and time settings.
To reset the seconds to 00: Press (D).
1 is added to the minutes when the
current count is between 30 and 59
seconds.
For all the other settings, use (A) and (D)
to change the flashing setting.
Holding down (A) or (D) scrolls through
settings at high speed.
5. Repeat steps 3 and 4 to select time and
date settings.
6. Press (B) to complete the setting
operation.
Note
While the setting is being configured,
the watch will exit the setting operation
automatically after about two or three
minutes of non-operation.
Watch Operation Guide 5708
16
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Switching between 12-hour and 24-
hour Timekeeping
You can specify either 12-hour format or 24-
hour format for the time display.
1. Enter the Timekeeping Mode.
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Navigating Between Modes
2. Hold down (B) for at least two seconds.
Release the button when the name of the
currently selected Home City appears on
the display.
This is the setting mode. The hands
automatically shift out of the way for
easy viewing of the display and other
indicators.
Home City
3. Press (C) twice.
This causes [12H] or [24H] to flash on the
display.
4. Press (D) to toggle the setting between
[12H] (12-hour timekeeping) and [24H]
(24-hour timekeeping).
24-hour
timekeeping
12-hour
timekeeping
5. Press (B) to complete the setting
operation.
Note
While the setting is being configured,
the watch will exit the setting operation
automatically after about two or three
minutes of non-operation.
Using the Watch in a Medical
Facility or Aircraft
When you are in a hospital, on an aircraft, or
in any other location where radio signals may
cause problems, you can perform the
procedure below to disconnect the watch from
your phone so they can’t communicate with
each other (Airplane Mode). Use the same
procedure when you want to disable the
Airplane Mode.
1. Enter the Timekeeping Mode.
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Navigating Between Modes
2. Hold down (B) for at least two seconds.
Release the button when the name of the
currently selected Home City appears on
the display.
This is the setting mode. The hands
automatically shift out of the way for
easy viewing of the display and other
indicators.
Home City
3. Press (C) 15 times.
This displays [ ].
4. Press (D) to toggle between the Airplane
Mode settings.
[ON]: Airplane Mode enabled.
[OFF]: Airplane Mode disabled.
5. Press (B) to complete the setting
operation.
Note
While the setting is being configured,
the watch will exit the setting operation
automatically after about two or three
minutes of non-operation.
World Time
World Time lets you look up the current time
in any one of 38 cities around the globe, and
UTC (Coordinated Universal Time).
Using CASIO WATCHES to
Configure World Time City
Settings
If the watch is paired with a phone, you can
also use CASIO WATCHES to set the World
Time city.
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Configuring World Time Settings
Note
World Time cities that can be selected
only by using CASIO WATCHES
cannot be selected using watch
operations.
Checking World Time
1. Enter the World Time Mode.
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Navigating Between Modes
After the currently selected World Time
City name appears, the watch will display
the current time in that city.
While in World Time Mode, you can
display the World Time City by pressing
(B).
World Time City
World Time
Watch Operation Guide 5708
17
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World Time City Setting
Use the procedure in this section to select a
World Time city. If you are in an area that
observes summer time, you can also
configure a summer time setting.
Note
The initial factory default summer time
setting for all cities is [AUTO]. In many
cases, the [AUTO] setting lets you use
the watch without switching between
summer time and standard time.
1. Enter the World Time Mode.
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Navigating Between Modes
2. Use (D) to display the city you want.
Holding down (D) scrolls through
settings at high speed.
3. To change the summer time setting, hold
down (B) for at least two seconds.
Release the button when [AUTO] starts to
flash.
This is the setting mode. The hands
automatically shift out of the way for
easy viewing of the display and other
indicators.
4. Use (D) to change the summer time
setting.
Each press of (D) cycles through settings
in the sequence shown below.
[AUTO]
The watch switches between standard
time and summer time automatically.
[OFF]
The watch always indicates standard
time.
[ON]
The watch always indicates summer
time.
5. Press (B) to complete the setting
operation.
Note
While the setting is being configured,
the watch will exit the setting operation
automatically after about two or three
minutes of non-operation.
While [UTC] is selected as the city, you
will not be able to change or check the
summer time setting.
If you select a World Time City with the
CASIO WATCHES phone app and
then change to a different city with a
watch operation, the CASIO
WATCHES city information is deleted
from the watch.
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Configuring World Time Settings
Swapping Your Home Time
and World Time
In the World Time mode, hold down (A) for at
least two seconds to swap your Home City
time with your World Time.
After swappingBefore swapping
Home Time
World Time
Home TimeWorld Time
Alarm
The watch will beep when an alarm time is
reached. You can set up to five different
alarms. The hourly time signal causes the
watch to beep every hour on the hour.
The beeper will not sound if battery power
is low.
Using CASIO WATCHES to
Configure Alarm Settings
If the watch is paired with a phone, you can
also use CASIO WATCHES to set alarms.
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Setting the Alarm
Watch Operation Guide 5708
18
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Configuring Alarm Settings
1. Enter the Alarm Mode.
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Navigating Between Modes
2. Press (D) to scroll through alarm numbers
([AL1] to [AL5]) until the alarm you want to
configure is displayed.
Alarm number
Alarm time
3. Hold down (B) for at least two seconds.
Release the button when the hour setting
starts to flash.
This is the setting mode. The hands
automatically shift out of the way for
easy viewing of the display and other
indicators.
While the setting is being configured,
the watch will exit the setting operation
automatically after about two or three
minutes of non-operation.
Alarm hour
4. Use (A) and (D) to change the hour setting.
Holding down (A) or (D) scrolls through
settings at high speed.
If you are using 12-hour timekeeping,
[P] indicates p.m.
5. Press (C).
This causes the minutes digits to flash.
Alarm minute
6. Use (A) and (D) to set the minute setting.
7. Press (B) to complete the setting
operation.
Note
A beeper sounds for 10 seconds when
an alarm time is reached.
The watch will automatically return
from the Alarm Mode to the
Timekeeping Mode if you do not
perform any operation for about two or
three minutes.
Testing the alarm
In the Alarm Mode, hold down (D) to sound the
alarm.
To stop the alarm
Pressing any button while the beeper is
sounding stops it.
Enabling the Hourly Time
Signal
1. Enter the Alarm Mode.
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Navigating Between Modes
2. Use (D) to display the hourly time signal
screen ([SIG]).
3. Press (B) to toggle the hourly time signal
between enabled and disabled.
[SIG] is displayed while the hourly time
signal is enabled.
Turning Off an Alarm or the
Hourly Time Signal
To stop an alarm or the hourly time signal from
sounding, perform the steps below to turn it
off.
To have an alarm or hourly time signal
sound again, turn it back on.
Note
Indicators are displayed while any of
the alarms or the hourly time signal is
turned on.
The applicable indicators are not
displayed while all of the alarms are
turned off and/or the hourly time signal
is turned off.
Alarm
Hourly time signal
Watch Operation Guide 5708
19
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1. Enter the Alarm Mode.
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Navigating Between Modes
2. Use (D) to scroll through the alarm ([AL1]
to [AL5]) and hourly time signal ([SIG])
screens until the one you want to turn off
is displayed.
Alarm number or hourly time signal
3. Press (B) to turn off the displayed alarm or
the hourly time signal.
Each press of (B) toggles between on
and off.
Turning off all of the alarms and the
hourly time signal causes [ALM] and
[SIG] to disappear from the display.
Note
If [ALM] remains on the display, it
means that at least one alarm is still
turned on. To turn off all of the alarms,
repeat steps 2 and 3 until the [ALM]
indicator is no longer displayed.
Moving to Another
Time Zone
When you enter another time zone, the watch
will adjust its time setting to your current
location in accordance with the time zone of
your phone. When you reach your destination,
disable the watch Airplane Mode.
1. When you reach your destination,
establish a connection between the watch
and your phone.
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Using the Watch in a Medical Facility or
Aircraft
After you disable the watch’s Airplane
Mode, it will adjust its time setting to the
time in your current location.
If you want to trigger immediate time
adjustment, refer to the information at
the link below.
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Triggering Immediate Time
Adjustment
Stopwatch
The stopwatch measures elapsed time in
1/1000-second units for the first hour, and in
1/10-second units after that for up to 24 hours.
In addition to normal elapsed time
measurements, the stopwatch also lets you
measure lap times.
Note
Up to 200 lap time records can be
stored in watch memory. Performing a
split time operation while there are
already 200 records in memory will
cause the oldest record to be deleted
automatically to make room for the new
one.
You can use CASIO WATCHES to
view past measurement data.
Lap Times
A lap time is the time elapsed during a specific
lap or segment. Lap times are recorded
internally by the watch. The watch displays the
elapsed time of the current lap.
D
Start
B
Lap 1
B
D
Goal
Lap 2
Lap 3
Note
Lap times can be viewed with CASIO
WATCHES after measurement is
complete.
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Viewing Stopwatch Data
Watch Operation Guide 5708
20
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Measuring Elapsed Time
1. Enter the Stopwatch Mode.
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Navigating Between Modes
2. Use the operations below to measure
elapsed time.
D
D
D
D
Stop
Resume
Stop
Start
Elapsed time is shown in 1/1000-
second units for the first hour of the
measurement session. After the first
hour, elapsed time is shown in 1/10-
second units.
Minutes, seconds
Hours, minutes
After first hourFirst hour
Seconds, 1/10 seconds
1/1000 seconds
3. Press (B) to reset the stopwatch to all
zeros.
Measuring Lap Times
1. Enter the Stopwatch Mode.
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Navigating Between Modes
If a stopwatch timing operation is in
progress, press (D) to stop it and then
press (B) to reset the stopwatch to all
zeros before performing the operation
in step 2.
2. Use the operations below to measure
elapsed time.
Each press of (B) displays, for about
eight seconds, the time elapsed (lap
time) since the last lap time operation.
D
B
D
Stop
Start
Lap
Elapsed time is shown in 1/1000-
second units for the first hour of the
measurement session. After the first
hour, elapsed time is shown in 1/10-
second units.
The mode hand points to the seconds
of the lap time. If more than 120 seconds
have elapsed since timing was started,
the mode hand points to [OVER].
3. Press (B) to reset the stopwatch to all
zeros.
Example: Recording a Race
Lap Time
This section explains how to record lap times
while watching a race. It also shows how you
can view lap times with CASIO WATCHES
after the race is over.
l
Lap Times
During a race
Measure lap times.
1. Enter the Stopwatch Mode.
l
Navigating Between Modes
2. Use the operations below to measure
elapsed time.
D
B
B
D
Stop
Start
Pressing (B) at the end of each lap will
record them in watch memory.
Lap times are recorded in 1/1000-
second units during the first hour of an
elapsed time measurement session.
After one hour, times are recorded in
1/10-second units.
3. Press (B) to reset the elapsed time to all
zeros.
4. Hold down (C) for at least two seconds to
return to the Timekeeping Mode.
After a race
You can view the measured lap times with
CASIO WATCHES.
l
Sending Stopwatch Data to a Phone
l
Checking a Lap Time
Watch Operation Guide 5708
21
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Timer
The timer counts down from a start time
specified by you. A beeper sounds when the
end of the countdown is reached.
The beeper will not sound if battery power
is low.
Using CASIO WATCHES to
Configure Timer Settings
If the watch is paired with a phone, you can
also use the CASIO WATCHES phone app to
set the timer start time.
l
Configuring Timer Settings
Setting the Countdown Start
Time
The countdown start time can be set in 1-
second units up to 24 hours.
If a timer countdown operation is in
progress, reset the timer to its current start
time before performing this operation.
l
Using the Timer
1. Enter the Timer Mode.
l
Navigating Between Modes
2. Hold down (B) for at least two seconds.
Release the button when the hour setting
starts to flash.
This is the setting mode. The hands
automatically shift out of the way for
easy viewing of the display and other
indicators.
Hours
3. Use (A) and (D) to change the timer hours
setting.
Holding down (A) or (D) scrolls through
settings at high speed.
4. Press (C).
This causes the minutes digits to flash.
Minutes
5. Use (A) and (D) to change the timer
minutes setting.
6. Press (C).
This causes the seconds to flash.
Seconds
7. Use (A) and (D) to change the timer
seconds setting.
8. Press (B) to complete the setting
operation.
Note
Setting a start time of [0:00'00]
performs a countdown of 24 hours.
While the setting is being configured,
the watch will exit the setting operation
automatically after about two or three
minutes of non-operation.
Using the Timer
1. Enter the Timer Mode.
l
Navigating Between Modes
Mode hand
The mode hand points the remaining
timer time. The mode hand points to
[OVER] when the remaining time
exceeds 120 minutes.
2. Use the operations below to perform a
timer operation.
D
D
D
(Time up)
Resume
Pause
(Countdown starts)
Start
A beeper will sound for 10 seconds to
let you know when the end of a
countdown is reached.
You can reset a paused countdown to
its start time, by pressing (B).
3. Press any button to stop the tone.
Watch Operation Guide 5708
22
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Hand Alignment
Adjustment
Strong magnetism or impact can cause the
time indicated by the analog hands to become
different from the time on the digital display. If
this happens, adjust hand alignment.
Using CASIO WATCHES to
Adjust Hand Alignment
If the watch is paired with a phone, you can
also use CASIO WATCHES to adjust hand
alignment.
l
Adjusting Hand Alignment
Adjusting Hand Alignment
1. Enter the Timekeeping Mode.
l
Navigating Between Modes
2. Hold down (B) for at least five seconds.
Release the button when [00] starts to
flash.
This enables adjustment of mode hand
alignment.
After five secondsAfter 3.5 seconds
Mode hand
3. If the mode hand is not aligned with [00],
use (A) and (D) to align it with [00].
Holding down (A) or (D) moves the hand
at high speed.
4. Press (C).
This enables adjustment of the hour and
minute hands.
Minute handHour hand
5. If the hour and minute hands are not at 12
o’clock, use (A) and (D) to align them.
Note
The hour hand moves in accordance
with minute hand movement. Your
button operations control movement of
the minute hand only.
6. Press (B) to complete the setting
operation.
Note
During hand alignment adjustment, the
watch automatically returns to the
Timekeeping Mode after two or three
minutes of non-operation.
Other Settings
This section explains other watch settings you
can configure.
Changing the Date Display
Format
1. Enter the Timekeeping Mode.
l
Navigating Between Modes
2. Hold down (B) for at least two seconds.
Release the button when the name of the
currently selected Home City appears on
the display.
This is the setting mode. The hands
automatically shift out of the way for
easy viewing of the display and other
indicators.
Home City
3. Press (C) six times.
This displays a screen for selecting the
date display format.
4. Press (D) to select a date display format.
[M.DD]: Month, day
[DD.M]: Day, month
5. Press (B) to complete the setting
operation.
Note
While the setting is being configured,
the watch will exit the setting operation
automatically after about two or three
minutes of non-operation.
Watch Operation Guide 5708
23
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Specifying the Day of the
Week Language
You can select any one of six languages for
the day of the week display in the Timekeeping
Mode.
1. Enter the Timekeeping Mode.
l
Navigating Between Modes
2. Hold down (B) for at least two seconds.
Release the button when the name of the
currently selected Home City appears on
the display.
This is the setting mode. The hands
automatically shift out of the way for
easy viewing of the display and other
indicators.
Home City
3. Press (C) 10 times.
This causes the language setting to flash.
4. Use (D) to select a language.
[ENG]: English
[ESP]: Spanish
[FRA]: French
[DEU]: German
[ITA]: Italian
[PyC]: Russian
5. Press (B) to complete the setting
operation.
Note
While the setting is being configured,
the watch will exit the setting operation
automatically after about two or three
minutes of non-operation.
Enabling or Disabling the
Schedule Timer Notification
Sound
Use the procedure below to enable or disable
the schedule timer notification sound.
1. Enter the Timekeeping Mode.
l
Navigating Between Modes
2. Hold down (B) for at least two seconds.
Release the button when the name of the
currently selected Home City appears on
the display.
This is the setting mode. The hands
automatically shift out of the way for
easy viewing of the display and other
indicators.
Home City
3. Press (C) 11 times.
This causes [BEEP] or [OFF] to flash on
the display.
4. Use (D) to select [BEEP] or [OFF].
[BEEP]: Beep enabled.
[OFF]: Beep disabled.
5. Press (B) to complete the setting
operation.
Note
While the setting is being configured,
the watch will exit the setting operation
automatically after about two or three
minutes of non-operation.
Enabling the Button
Operation Tone
Use the procedure below to enable or disable
the tone that sounds when you press a button.
1. Enter the Timekeeping Mode.
l
Navigating Between Modes
2. Hold down (B) for at least two seconds.
Release the button when the name of the
currently selected Home City appears on
the display.
This is the setting mode. The hands
automatically shift out of the way for
easy viewing of the display and other
indicators.
Home City
3. Press (C) 12 times.
This causes [KEY♪] or [MUTE] to flash on
the display.
4. Press (D) to select [KEY♪] or [MUTE].
[KEY♪]: Operation tone enabled.
[MUTE]: Operation tone muted.
5. Press (B) to complete the setting
operation.
Watch Operation Guide 5708
24
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Note
While the setting is being configured,
the watch will exit the setting operation
automatically after about two or three
minutes of non-operation.
Note that alarm and timer tones will still
sound even while the operation tone is
muted.
Resetting Watch Settings
This section explains how to return the watch
settings below to their initial factory defaults.
Watch Settings
Stopwatch
Timer
Alarm
1. Enter the Timekeeping Mode.
l
Navigating Between Modes
2. Hold down (B) for at least two seconds.
Release the button when the name of the
currently selected Home City appears on
the display.
This is the setting mode. The hands
automatically shift out of the way for
easy viewing of the display and other
indicators.
Home City
3. Press (C) three times.
This causes the seconds to flash.
Seconds
4. Hold down (A) for at least five seconds.
Release the button when [RESET] stops
flashing.
5. Press (B) to complete the setting
operation.
Note
While the setting is being configured,
the watch will exit the setting operation
automatically after about two or three
minutes of non-operation.
Resetting the watch will also delete
information for pairing the watch with a
phone, and unpair them.
Other Information
This section provides non-operational
information you also need to know. Refer to
this information as required.
City Table
City Offset
UTC
Coordinated
Universal Time
0
LONDON London 0
PARIS Paris +1
ATHENS Athens +2
JEDDAH Jeddah +3
TEHRAN Tehran +3.5
DUBAI Dubai +4
KABUL Kabul +4.5
KARACHI Karachi +5
DELHI Delhi +5.5
KATHMANDU Kathmandu +5.75
DHAKA Dhaka +6
YANGON Yangon +6.5
BANGKOK Bangkok +7
HONG KONG Hong Kong +8
EUCLA Eucla +8.75
TOKYO Tokyo +9
ADELAIDE Adelaide +9.5
SYDNEY Sydney +10
LORD HOWE
ISLAND
Lord Howe
Island
+10.5
NOUMEA Noumea +11
WELLINGTON Wellington +12
CHATHAM
ISLAND
Chatham
Islands
+12.75
NUKU’ALOFA Nuku’alofa +13
KIRITIMATI Kiritimati +14
BAKER ISLAND Baker Island -12
PAGO PAGO Pago Pago -11
HONOLULU Honolulu -10
MARQUESAS
ISLANDS
Marquesas
Islands
-9.5
ANCHORAGE Anchorage -9
LOS ANGELES Los Angeles -8
DENVER Denver -7
CHICAGO Chicago -6
NEW YORK New York -5
HALIFAX Halifax -4
ST. JOHN’S St. John’s -3.5
RIO DE JANEIRO Rio de Janeiro -3
F. DE NORONHA
Fernando de
Noronha
-2
PRAIA Praia -1
Watch Operation Guide 5708
25
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The information in the above table is current
as of July 2022.
Time zones may change and UTC
differentials may become different from
those shown in the table above. If this
happens, connect the watch with a phone
to update the watch with the latest time zone
information.
Summer Time Table
When [AUTO] is selected for a city that
observes summer time, switching between
standard time and summer time will be
performed automatically at the timing shown
in the table below.
Note
Summer time start and end dates for
your current location may be different
from those shown below. If this
happens, you can have new summer
time information for your Home City
and World Time City sent to the watch
by connecting the watch with a phone.
If the watch is not connected with a
phone, you can change the summer
time setting manually.
City Name
Summer Time
Start
Summer Time
End
London
01:00, last
Sunday in March
02:00, last
Sunday in
October
Paris
02:00, last
Sunday in March
03:00, last
Sunday in
October
Athens
03:00, last
Sunday in March
04:00, last
Sunday in
October
Tehran
00:00, March 22
or 21
00:00,
September 22 or
21
Sydney,
Adelaide
02:00, first
Sunday in
October
03:00, first
Sunday in April
Lord Howe
Island
02:00, first
Sunday in
October
02:00, first
Sunday in April
Wellington
02:00, last
Sunday in
September
03:00, first
Sunday in April
Chatham
Islands
02:45, last
Sunday in
September
03:45, first
Sunday in April
Anchorage
02:00, second
Sunday in March
02:00, first
Sunday in
November
Los
Angeles
02:00, second
Sunday in March
02:00, first
Sunday in
November
Denver
02:00, second
Sunday in March
02:00, first
Sunday in
November
Chicago
02:00, second
Sunday in March
02:00, first
Sunday in
November
New York
02:00, second
Sunday in March
02:00, first
Sunday in
November
Halifax
02:00, second
Sunday in March
02:00, first
Sunday in
November
St. John’s
02:00, second
Sunday in March
02:00, first
Sunday in
November
Rio de
Janeiro*
Midnight, first
Sunday in
November
00:00, third
Sunday in
February or
00:00, fourth
Sunday in
February
* Though summer time was discontinued in
Rio de Janeiro as of July 2022, this watch does
not reflect this change.
The information in the above table is current
as of July 2022.
Supported Phones
For information about phones that can
connect with the watch, visit the CASIO
website.
https://world.casio.com/os_mobile/wat/
Specifications
Accuracy at normal temperature :
±15 seconds per month average when time
adjustment by communication with a phone is
not possible.
Timekeeping :
Analog
Hour, minute (moves every 20 seconds)
Digital
Hour, minute, second, month, day, day of
the week
a.m./p.m.(P)/24-hour timekeeping
Full Auto Calendar (2000 to 2099)
Summer Time
Stopwatch :
Measurement unit:
1/1000 seconds (first hour)
1/10 seconds (after first hour)
Measurement range: 23 hours 59 minutes
59.9 seconds
Measurement Functions:
Elapsed time, lap times
Timer :
Measuring unit: 1 second
Range: 24 hours
Time setting unit: 1 second
10-second beeper when the end of the
countdown is reached
Alarm :
Time alarm
Number of alarms
5
Setting units
Hours, minutes
Alarm tone duration: 10 seconds
Hourly time signal: Beep every hour on the
hour
World Time :
38 cities (38 time zones) and Coordinated
Universal Time (UTC)
Summer time
Home Time swapping
Watch Operation Guide 5708
26
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Mobile Link :
Auto Time Correction
Phone finder
Watch operation sounds the alert sound
of the mobile phone
World Time
Current time for approximately 300 cities
selected for the watch
Home Time/World Time swapping
Stopwatch data transfer
200 lap time records (date and time, lap
time, lap number)
Auto Summer Time Switching
Automatic switching between standard
time and summer time
Timer Settings
Alarm Settings
Hand alignment correction
Schedule timer
Links with your phone’s calendar, and
uses the watch’s hands and digital
display to show time remaining to an
event, ending time, etc.
Data Communication Specifications
Bluetooth
®
Frequency Band: 2400MHz to 2480MHz
Maximum Transmission: 0 dBm (1 mW)
Communication range: Up to 2 meters
(depends on environment)
Double LED light :
Face LED light and LCD LED backlight
(Auto Light, Super Illuminator, afterglow,
selectable afterglow duration: 1.5 seconds
or 3 seconds)
Other :
Operation tone on/off, schedule notification
tone on/off, month/day order, day of the
week language, airplane mode, hand shift,
low battery indicator
Power Supply :
CR2016 x 1
Battery life: Approximately 2 years
Conditions:
Bluetooth Connection Time: 12
hours/day
Alarm: Once (10 seconds)/day
Illumination: Once (1.5 seconds)/day
Specifications are subject to change without
notice.
Copyrights and Registered
Copyrights
The Bluetooth
®
word mark and logos are
registered trademarks owned by the
Bluetooth SIG, Inc. and any use of such
marks by CASIO Computer Co., Ltd. is
under license.
iPhone and App Store are trademarks of
Apple Inc. in the United States and other
countries.
iOS is a trademark or registered trademark
of Cisco Systems, Inc.
Android and Google Play
TM
are trademarks
or registered trademarks of Google LLC.
Other company names and product names
used herein are trademarks or registered
trademarks of their respective companies.
Troubleshooting
I can’t pair the watch with a
phone.
Q1
I’ve never been able to establish a
(pairing) connection between the
watch and phone.
Are you using a supported phone model?
Check if the phone model and its
operating system are supported by the
watch.
For information about supported phone
models, visit the CASIO Website.
https://world.casio.com/os_mobile/wat/
Did you install the CASIO WATCHES
phone app on your phone?
The CASIO WATCHES phone app needs
to be installed on your phone in order to
connect with the watch.
l
A
Install the app on your phone.
Are your phone’s Bluetooth settings
configured correctly?
Configure the phone’s Bluetooth settings.
For details about setting procedures, see
your phone documentation.
iPhone Users
“Settings”
n
“Bluetooth”
n
On
“Settings”
n
“Privacy”
n
“Bluetooth”
n
“CASIO WATCHES”
n
On
Android Users
Enable Bluetooth.
Other than the above.
Some phones need to have BT Smart
disabled to use the CASIO WATCHES
phone app. For details about setting
procedures, see your phone
documentation.
On the Home Screen, tap: “Menu”
n
“Settings”
n
“Bluetooth”
n
“Menu”
n
“BT Smart settings”
n
“Disable”.
Watch Operation Guide 5708
27
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I can’t reconnect the watch
and phone.
Q1
The watch will not re-connect with the
phone after they are disconnected.
Is the CASIO WATCHES phone app
running?
The watch cannot re-connect with your
phone unless CASIO WATCHES is
running on the phone. On your phone’s
Home Screen, tap the “CASIO
WATCHES” icon. Next, on the watch, hold
down (D) for at least two seconds.
Have you tried turning your phone off and
then back on again?
Turn your phone off and back on, and then
tap the “CASIO WATCHES” icon. Next,
on the watch, hold down (D) for at least
two seconds.
Q2
I can’t connect while my phone is in
the Airplane Mode.
Connection with the watch is not possible
while your phone is in the Airplane Mode. After
disabling the phone’s Airplane Mode, go to the
phone’s Home Screen and tap the “CASIO
WATCHES” icon. Next, on the watch, hold
down (D) for at least two seconds.
Q3
I changed the phone’s Bluetooth
from enabled to disabled, and now I
can’t connect anymore.
On your phone, enable Bluetooth, and then go
to the Home Screen and tap the “CASIO
WATCHES” icon. Next, on the watch, hold
down (D) for at least two seconds.
Q4
I can’t connect after turning off the
phone.
Turn your phone off and back on, and then tap
the “CASIO WATCHES” icon. Next, on the
watch, hold down (D) for at least two seconds.
Q5
e
Is not displayed, and the watch is
not connected with my phone.
Is a setting operation in progress?
Bluetooth connection is temporarily
disabled while any setting operation (time
setting, alarm setting, etc.) is in progress.
Exit the setting operation to re-connect.
Have you performed some watch
operation within the past hour?
To preserve battery power, the watch will
automatically terminate Bluetooth
connection with your phone temporarily if
it detects the connection has been unused
for approximately one hour. Auto Time
Adjustment is disabled while there is no
connection. To reconnect, press any
watch button or angle the watch towards
your face.
Phone-Watch Connection
Q1
I can’t establish a connection
between the phone and watch.
Have you tried turning your phone off and
then back on again?
Turn your phone off and back on, and then
tap the “CASIO WATCHES” icon. Next,
on the watch, hold down (D) for at least
two seconds.
Is the watch’s Airplane Mode enabled?
Connection with your phone is not
possible while the watch’s Airplane Mode
is enabled. To connect with your phone,
disable the Airplane Mode.
l
Using the Watch in a Medical Facility or
Aircraft
Has the watch been re-paired with the
phone?
Delete the pairing information from the
CASIO WATCHES phone app and your
phone (iPhone only), and then re-pair
them.
l
Deleting Pairing Information from the
CASIO WATCHES phone app
l
iPhone Only
Deleting the phone’s pairing
information
l
C
Pair the watch with a phone.
If you are unable to establish a
connection...
After deleting pairing information from the
watch, re-pair it with your phone.
l
Deleting Pairing Information from the
Watch
l
C
Pair the watch with a phone.
Watch Operation Guide 5708
28
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Changing to a Different
Phone Model
Q1
Connecting the current watch to
another phone.
Delete the pairing information from your watch
and then pair it with the phone you want to
connect with.
l
If you purchase another phone
Auto Time Adjustment by
Bluetooth Connection (Time
Adjustment)
Q1
When does the watch adjust its time?
Your watch can connect with a paired phone
to adjust its time setting. Auto time adjustment
is performed at the times described below.
After your phone’s time zone or summer
time setting is changed
After 24 hours or more have passed since
the last time adjustment using Bluetooth
connection
After 24 hours or more have passed since
city swapping using CASIO WATCHES or
watch operation
After 24 hours or more have passed since
the last home city change or time
adjustment using watch operation
Q2
Auto time setting is not correct.
Is
e
displayed?
To preserve battery power, the watch will
automatically terminate Bluetooth
connection with your phone temporarily if
it detects the connection has been unused
for approximately one hour. Auto Time
Adjustment is disabled while there is no
connection. To reconnect, press any
watch button or angle the watch towards
your face.
Have 24 hours or more passed since the
last time adjustment using Bluetooth
connection?
Time adjustment using Bluetooth
connection is performed once every 24
hours. Auto time adjustment will be
performed when 24 hours or more have
elapsed since the last time adjustment
operation.
Have 24 hours or more has passed since
the last manual time adjustment, city
change, or city swapping operation?
Auto time adjustment is not performed for
24 hours after a manual time adjustment,
city change, or city swapping operation.
Auto time adjustment will resume after 24
hours or more have elapsed after either of
the above operations is performed.
Is the watch’s Airplane Mode enabled?
Connection with your phone is not
possible while the watch’s Airplane Mode
is enabled. To connect with your phone,
disable the Airplane Mode.
l
Using the Watch in a Medical Facility or
Aircraft
Q3
The watch does not synchronize its
time setting with my phone when I
hold down (D) for at least two
seconds.
Connection with your phone is not possible
while the watch’s Airplane Mode is enabled.
To connect with your phone, disable the
Airplane Mode.
l
Using the Watch in a Medical Facility or
Aircraft
Q4
Time is not displayed correctly.
The phone’s time setting may be incorrect
because it is unable to connect with its
network due to being out of range, etc. If this
happens, connect the phone to its network
and then adjust the time setting.
Schedule timer
Q1
How do I disable the schedule timer
notification sound?
Use the procedure below to disable the
schedule timer notification sound.
l
Enabling or Disabling the Schedule Timer
Notification Sound
Q2
The schedule timer notification
sound does not sound.
Is schedule timer notification sound turned
on? If it isn’t, turn it on so it will sound.
l
Enabling or Disabling the Schedule Timer
Notification Sound
Q3
The schedule timer function does not
work.
The schedule timer becomes disabled if you
manually adjust the watch’s time setting.
Before using the Schedule Timer, connect the
watch with your phone and sync their time
settings.
l
Connecting with a Phone
Q4
[--:-- END] remains on the display
and I cannot use the schedule timer
even though settings are configured
to allow use of the schedule timer.
Have you adjusted time settings
manually?
The schedule timer becomes disabled if
you manually adjust the watch’s time
setting. Before using the Schedule Timer,
connect the watch with your phone and
sync their time settings.
l
Connecting with a Phone
Is the scheduled event within 24 hours
from your current time?
Up to five scheduled events, scheduled
within 24 hours from your current time are
sent from your phone to the watch.
Watch Operation Guide 5708
29
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Alarm and Hourly Time
Signal
Q1
An alarm does not sound.
The alarm’s settings may not be configured.
Configure the alarm settings.
l
Configuring Alarm Settings
Q2
The hourly time signal does not
sound.
The hourly time signal may be disabled.
Enable the hourly time signal.
l
Enabling the Hourly Time Signal
Battery
Q1
is flashing on the digital
display.
flashes on the display when battery
voltage goes low.
Have the battery replaced.
Request battery replacement from a CASIO
service center or your original retailer.
l
Battery Replacement
Q2
[R] is flashing on the digital display.
[R] may appear on the display when the
watch’s battery power is low, or if you use the
light or other function a number of times during
a short period, which momentarily causes the
battery level to go low. If this happens, all
watch functions, except for timekeeping, are
disabled.
If [R] remains on the display or if it keeps
appearing, it may indicate that the battery
needs to be replaced.
Request battery replacement from a CASIO
service center or your original retailer.
Hand Movement and
Indications
Q1
I don’t know what mode the watch is
in.
To return to the Timekeeping Mode, hold
down (C) for at least two seconds.
l
Navigating Between Modes
Q2
All hands are stopped and buttons do
not work.
The battery is dead. Request battery
replacement from a CASIO service center or
your original retailer.
l
Battery Replacement
Q3
The hands suddenly start moving at
high speed.
This is due to the reason (or one of the
reasons) below, and does not indicate
malfunction. Simply wait until normal hand
movement resumes.
Watch is connected with a phone to adjust
its time setting.
l
Auto Time Adjustment
Q4
Why is the current time indicated by
the watch is off by a certain amount
of time (nine hours, three hours and
15 minutes, etc.)?
The city setting is not correct. Select the
correct setting.
l
Setting a Home City
Q5
The current time indicated by the
watch is off by one hour or 30
minutes.
The summer time setting is not correct. Select
the correct setting.
l
Setting a Home City
Q6
The time indicated by the hands is
different from the digital time.
Strong magnetism or impact can cause the
hands to go out of alignment. Adjust hand
alignment.
l
Adjusting Hand Alignment
Check the information below to find out how
to align the hands manually.
l
Adjusting Hand Alignment
Other
Q1
I can’t find the information I need
here.
Visit the website below.
https://world.casio.com/support/
Watch Operation Guide 5708
30

Specifications

Casio ECB-40YDB Questions and Answers