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Casio 3515 User manual

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Contents
Precautions
Operating Precautions
User Maintenance
Battery
Mobile Link Precautions
Easy Operation
Performing Activity Measurement with the
Watch
Using the Phone App to View Activity Results
Recover Support and Health Management
Before Using the Watch
About This Watch
Charging the Watch
Charging with the Charger Cable
Solar Charging
Checking the Charge Level
Charging Time Guidelines
Power Saving
Connecting with a Phone
Pairing the Watch with Your Phone
Connecting with a Phone Paired With the
Watch
Unpairing
After Purchasing Another Phone
Creating Your Profile
Mode Overview
Watch Mode
Activity Mode
Control Mode
Performing Activity
Measurement
Activity Overview
Activity Measurement that Supports GPS
Reception
Activities that Support Measurement
Without GPS Signal Reception
Performing Activity Measurement
Before Using Pool Swimming (POOL
SWIMMING)
Using the Timer for Interval Training
Overview
Timing with Interval Timers
Pausing and Resetting the Timer
Starting Heart-rate Training
Activity Measurement Precautions
Viewing Activity Log Records
Viewable Activity Log Items
Viewing Activity Records
Deleting Activity Records
Deleting Specific Data
Deleting All Activity Data
Viewing Your Training
Performance Condition
Viewing Your Cardio Load Status
Using Nightly Recharge™ to
Check Your Recovery Status
Checking Nightly Recharge™ Status
Breathing Exercises
Setting a Breathing Exercise Duration
Measuring a Breathing Exercise
Smart Alarm
Configuring Smart Alarm Settings
Turning Off Smart Alarm
Measuring Your Heart Rate
Checking Your Current Heart Rate
Using Heart Rate Measurement
Heart Rate Measurement Precautions
Blood Oxygen Level
Measurement
Measuring Your Blood Oxygen Level
Viewing Life Log Data
Viewing Life Log Data
Compass Reading
Taking a Compass Reading
Calibrating the Compass
Calibrating Compass Readings
Setting Up for True North Readings
(Magnetic Declination Calibration)
Magnetic North and True North
Digital Compass Reading Precautions
Watch Operation Guide 3515
1
MA2302-EA
OPUM-G
© 2023 CASIO COMPUTER CO., LTD.
Altitude Measurement
Checking the Current Altitude
Setting a Reference Altitude and Taking
Altitude Differential Readings
Calibrating Altitude Readings
Setting the Auto Measurement Interval
Altitude Reading Precautions
Barometric Pressure and
Temperature Measurement
Checking the Current Barometric Pressure
and Temperature
Barometric Pressure Change Indications
Calibrating Barometric Pressure Readings
Calibrating Temperature Readings
Barometric Pressure and Temperature
Reading Precautions
Almanac (Sunrise and Sunset
Times, and Moon Age)
Checking Sunrise and Sunset Times, and
Moon Age
Time Adjustment
Automatically Connecting with a Phone to
Sync the Current Watch’s Time Setting
Auto Time Adjustment
Manually Connecting with a Phone to
Sync the Watch’s Time Setting
Adjusting the Watch’s Current Time Setting
Using GPS
Appropriate Signal Reception Location
Adjusting Time Settings by Performing a
Manual GPS Signal Receive Operation
Leap Second Reception
Signal Reception Precautions
Using GPS Outside Your Country
Using Watch Operations to Adjust the Time
Setting
World Time
Configuring World Time Settings
Alarm
Configuring Alarm Settings
Turning Off an Alarm
Stopwatch
Measuring Elapsed Time
Measuring a Split Time
Timer
Setting a Start Time
Using the Timer
Pedometer
Counting Steps
Causes of Incorrect Step Count
Receiving Phone Notifications
Enabling and Disabling Incoming Call
Notifications
Displaying Notification Contents
Cycling Between Notification Cut-in Displays
Deleting a Notification
Deleting a Particular Notification
Deleting All Notifications
Activity Measurement
Settings
Enabling Auto Lap Timing
Setting the Swimming Pool Length
Enabling Auto Pause
Changing the GPS Receive Interval
Configuring Training Alert Settings
Training Alert Screen Indicators
Alert Screen Switching
Configuring Distance Display Settings
Configuring Interval Timer Settings
Using the Application to
Configure Settings
Specifying a Watch Face
Customizing the Watch Mode and Activity
Mode Functions
Configuring Activity Measurement Display
Settings
Specifying Checkpoints Along a Training
Course (Altitude Navigation)
Enabling the Wrist Sensor
Specifying Your Desired Bedtime and Wake-
Up Time
Specifying a Daily Step Count Target
Configuring Watch Settings
Watch Operation Guide 3515
2
Other Settings
Changing the Watch Face
Enabling Step Reminder
Specifying the Night Time
Configuring Sound and Vibration Settings
Configuring Operation Sound and
Vibration Settings
Configuring Notification Sound and
Vibration Settings
Configuring the Auto Light Setting
Specifying the Illumination Duration
Enabling Power Saving
Disabling Power Saving
Changing the Length and Weight Units
Specifying the Calorie Display Unit
Specifying the Barometric Pressure Unit
Specifying the Temperature Unit
Basic Information
General Guide
Indicators
Viewing the Face in the Dark
Fastening the Watch to Your Wrist
Updating the Watch’s Software Version
Resetting Watch Settings
Phone Finder
Entering the Watch Airplane Mode
Other Information
City Table
Summer Time Table
Fitness Categories
Supported Phones
Specifications
Message Screen List
Checking Wireless Compliance Information
Copyrights and Registered Copyrights
Troubleshooting
Watch Operation Guide 3515
3
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 3515
4
●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
●Though operation of your watch normally is
not affected by magnetism, its accuracy
may be affected if the watch itself becomes
magnetized. Also, 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.
●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.
Watch Operation Guide 3515
5
●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.
●Watch Sensors
●A watch sensor is a precision instrument.
Never try to take it apart. Never try to insert
any objects into the openings of a sensor,
and take care to ensure that dirt, dust, or
other foreign matter does not get into it.
After using your watch where it has been
immersed in saltwater, rinse it thoroughly
with fresh water.
●Heart Rate Monitor Functions
●The back cover of the watch has a built-in
sensor that detects your pulse. This is used
to calculate and display an approximate
heart rate value. The factors below can
cause error in the displayed heart rate
value.
ー 
How the watch is affixed to the wrist
ー 
Individual wrist characteristics and
conditions
ー 
Training type and intensity
ー 
Sweat, dirt, and/or other foreign matter
near the sensor
All of this means that heart rate values
displayed by the watch are approximate,
and no guarantees are made concerning
their accuracy.
●The heart rate monitor function of this watch
is intended for recreational purposes, and
should not be used in any way for medical
purposes.
●Chargeable Battery Handling (Please
recycle!)
The built-in lithium-ion battery includes
valuable resources. When you are ready to
discard your watch, follow proper procedures
in order to recycle resources. For information
about the proper procedure to follow when
discarding the watch, contact an authorized
CASIO service center or your original retailer.
Important!
●Do not try to replace batteries by
yourself. Request battery replacement
from an authorized CASIO service
center or your original retailer.
●Personal Information Protection
Precautions
To protect your personal information, be sure
to perform the operation under “Resetting
Watch Settings” before transferring
ownership of this watch to another party or
before disposing of it.
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.
Watch Operation Guide 3515
6
●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.
Battery
●The special rechargeable battery used by
your watch is not intended to be removed or
replaced by you. Use of a rechargeable
battery other than the special one specified
for your watch can damage your watch.
●The rechargeable (secondary) battery can
be charged by using the charging cable to
connect the watch to a device equipped
with a USB terminal, so it does not require
regular replacement as the primary battery
requires. Note, however, that long use or
operating conditions can cause the
capacity or charging efficiency of the
rechargeable battery to deteriorate. If you
feel that the amount of operation provided
by charging is too short, contact your
original retailer or CASIO service center.
●Regular, once-a-month charging is
recommended to extend the service life of
the watch’s battery.
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 watch is emitting radio waves while e is
on the display or while GPS is in use.
When in a hospital, on an aircraft, or in any
other area where the use of radio waves is not
allowed, enable the Airplane Mode.
lEntering the Watch Airplane Mode
Watch Operation Guide 3515
7
Easy Operation
Performing Activity
Measurement with the Watch
You can use the watch to view activity data
measured while wearing the watch.
The flow of this operation is shown below.
●Measurement Flow (Running
Measurement)
1. Affix the watch correctly to your wrist.
lFastening the Watch to Your Wrist
2. Perform the required watch operations to
select [RUNNING] from among the activity
measurement options.
lPerforming Activity Measurement
3. Start running.
Perform the required watch operation to
start measurement.
lPerforming Activity Measurement
4. Finish running.
lTo pause or end a measurement
operation
5. Save the measured data.
lTo pause or end a measurement
operation
6. Use the watch to view the measured data.
lViewing Activity Log Records
Note
●When measuring an activity other than
running, select an option other than
[RUNNING] in step 2, above.
●Useful Functions
You can customize the activity measurement
settings below to allow more effective
measurement.
●Auto lap measurement, Auto lap distance
●Auto pause
●Heart Rate Zone
Besides these, other settings can be
customized. For details, see the information
below.
lPerforming Activity Measurement
lActivity Measurement Settings
lStarting Heart-rate Training
Using the Phone App to View
Activity Results
You can use the “CASIO WATCHES” phone
app to view activity data you measured with
the watch.
The flow of this operation is shown below.
●Getting Ready
Before measuring activity data for the first
time, you need to prepare by performing the
following steps. You do not need to perform
these steps again for subsequent activity
measurements.
●Connecting with a Phone
ー 
Install the “CASIO WATCHES” phone
app on your phone
ー 
Pair the watch with your phone
lPairing the Watch with Your Phone
●Measurement Flow (Running
Measurement)
1. Affix the watch correctly to your wrist.
lFastening the Watch to Your Wrist
2. Perform the required watch operations to
select [RUNNING] from among the activity
measurement options.
lPerforming Activity Measurement
3. Start running.
Perform the required watch operation to
start measurement.
lPerforming Activity Measurement
4. Finish running.
lTo pause or end a measurement
operation
5. Save the measured data.
lTo pause or end a measurement
operation
6. Check the measured data with the watch
or the CASIO WATCHES phone app.
lViewing Activity Log Records
Note
●When measuring an activity other than
running, select an option other than
[RUNNING] in step 2, above.
●Measured data is transferred from the
watch to CASIO WATCHES phone
app at the timing noted below.
ー 
Immediately after a measurement
operation, while connected to the
phone, is complete
ー 
If you are not connected to your
phone during measurement,
immediately after reconnecting
ー 
If your phone is turned off,
immediately after it is turned on, and
CASIO WATCHES phone app is
started up
●If you cannot connect to your phone or
transfer data, restart CASIO
WATCHES phone app.
●Useful Functions
You can customize the activity measurement
settings below to allow more effective
measurement.
●Activity Measurement Screen
●Auto lap measurement, Auto lap distance
●Auto pause
●Training Alert
●Heart Rate Zone
Besides these, other settings can be
customized. For details, see the information
below.
lPerforming Activity Measurement
lActivity Measurement Settings
lStarting Heart-rate Training
Watch Operation Guide 3515
8
Recover Support and Health
Management
This section explains the operation flow for
operations for functions that support the body.
●Blood Oxygen Level Measurement
This function measures your blood oxygen
level. You can view measurement results on
your watch.
●Sleep Measurement (Nightly Recharge™)
If you wear your watch in bed, you can keep
track of your physical condition while you
are sleeping and the quality of your sleep.
You can view measurement results on your
watch and with the phone app.
●Breathing Exercise (Breathing Exercise)
This mode supports stress reduction using
guidance that promotes breathing at a slow
and stable rhythm. You can view
measurement results on your watch.
●Step Reminder
When the watch detects that your step
count over a certain period is low, it notifies
you and encourages you to walk more. If the
watch performs this Step Reminder alert
operation, get up and walk for five minutes
to clear it.
●Blood Oxygen Level Measurement
1. Affix the watch correctly to your wrist.
lFastening the Watch to Your Wrist
2. Start blood oxygen level measurement.
After the measurement operation is
complete, the watch displays the
measurement result.
lMeasuring Your Blood Oxygen Level
3. View the measurement results on your
watch.
Note
●For details about blood oxygen level
measurements, see the information
below.
lBlood Oxygen Level
Measurement
●Sleep Measurement (Nightly
Recharge™)
* Powered by Polar
1. Specify your night time.
lSpecifying the Night Time
2. Specify your bedtime and wake-up time.
lSpecifying Your Desired Bedtime and
Wake-Up Time
3. Affix the watch correctly to your wrist.
lFastening the Watch to Your Wrist
4. Get your normal sleep.
Measurement will automatically end when
the watch detects that you have woken
up.
5. View the measurement results on your
watch.
lChecking Nightly Recharge™ Status
Note
●You cannot use watch operations to
configure bedtime and wake-up time
settings. To configure bedtime and
wake-up time settings, pair the watch
with your phone and then use CASIO
WATCHES phone app to configure
settings.
lPairing the Watch with Your Phone
●For information on sleep
measurement, see the information
below.
lUsing Nightly Recharge™ to
Check Your Recovery Status
●You can view sleep measurement
results on your watch. Note that you
cannot view sleep analysis results on
your watch. Use the CASIO
WATCHES phone app to view sleep
analysis results.
●To improve sleep analysis accuracy, it
may take about one to two hours after
you wake up for measurement results
to be displayed on the watch.
●For details about sleep support
functions, see the information below.
lSmart Alarm
●Breathing Exercise (Breathing
Exercise)
* Powered by Polar
1. Affix the watch correctly to your wrist.
lFastening the Watch to Your Wrist
2. Start the breathing exercise.
Take deep breaths following the
animation on the watch screen.
The watch displays the status of your
mind and body in real time.
When you finish your breathing exercise,
the watch displays measurement results.
lMeasuring a Breathing Exercise
3. View the measurement results on your
watch.
Note
●For information about breathing
exercises, see the information below.
lBreathing Exercises
lSetting a Breathing Exercise
Duration
●Step Reminder
1. Enable Step Reminder.
lEnabling Step Reminder
2. The watch notifies you when it detects that
your step count over a certain period is
low.
Press any button to clear the notification.
Note
●If behavior analysis does not detect
walking and running, the watch may
notify you that the step reminder
function determined the number of
steps is low.
Watch Operation Guide 3515
9
Before Using the
Watch
About This Watch
Watch Features
●Phone Linking
You can transfer activity data to a
Bluetooth® capable phone and work with it
using phone applications.
●Activity Function
Use this function to measure and record
distance, elapsed time, pace, and other
activity data.
●Activity Log
Activity Log can store up to 100 records of
data acquired during activity measurement.
●Life Log
You can use Life Log to check your step
count, calories burned, active time results,
and other information.
●Heart Rate Measurement
This function measures your estimated
heart rate.
●Blood Oxygen Level Measurement
This function measures your blood oxygen
level.
●Breathing Exercise
This function guides you through breathing
exercises.
●Nightly Recharge™
This function analyzes your sleep and
provides information about your physical
recovery.
●Compass Reading
You can use the compass function to
determine the direction of north, and to
check your bearing to a destination.
●Altitude Measurement
You can use this function to take an altitude
reading at your current location.
You can record the altitude, along with the
date and time of the measurement.
You can also measure the altitude
differential between two points.
●Barometric Pressure and Temperature
Measurement
You can display the current barometric
pressure tendency, which helps you be on
the alert for noteworthy pressure changes.
The watch can be used to take current air
temperature readings.
Important!
●This watch is not a special-purpose
measuring instrument. Measurement
function readings are intended for
general reference only.
●When using this watch for serious
trekking, mountain climbing, or other
activities, always take along another
compass to confirm readings. If the
readings produced by this watch are
different from those of the other
compass, perform figure 8-calibration
of the watch’s compass to ensure
better accuracy.
ー 
Compass readings and calibration
will not be possible if the watch is in
the vicinity of a permanent magnet
(magnetic accessory, etc.), metal
objects, high-voltage wires, aerial
wires, or electrical household
appliances (TV, computer,
cellphone, etc.)
lCompass Reading
●The watch’s altimeter function
calculates and displays relative
altitude based on barometric pressure
readings produced by its pressure
sensor. Because of this, altitude
values displayed by the watch may be
different from your actual elevation
and/or sea level elevation indicated for
the area where you are located.
Regular calibration in accordance with
the local altitude (elevation)
indications is recommended.
lAltitude Measurement
Note
●The illustrations included in this
operation guide have been created to
facilitate explanation. An illustration
may differ somewhat from the item it
represents.
●You can obtain more accurate display
values by creating a profile before
measuring your heart rate or activity
data.
lCreating Your Profile
●Depending on the version of your
watch’s software, its operations and
display contents may differ from those
described in this Operation Guide.
●You may need to upgrade your watch
software to use the functions and to
display the screens described in this
Operation Guide. Use of the latest
software version is recommended.
lUpdating the Watch’s Software
Version
Watch Operation Guide 3515
10