Module No. 2413
2413-1
GETTING ACQUAINTED
Congratulations upon your selection of this CASIO watch. To get the most out of your
purchase, be sure to carefully read this manual and keep it on hand for later reference
when necessary.
After Skin Diving/Snorkeling
• To avoid corrosion, rinse your watch thoroughly with fresh water to remove
salt water, dirt, etc. (When possible, soak the watch in fresh water overnight to
make sure that all salt is removed.)
• When using a metal band, occasionally clean inside the gaps in the band
using a soft toothbrush and soapy water. Failure to do so can result in
corrosion of the watch, soiling of clothing, or irritation to sensitive skin.
Precautions
• This watch is intended for use up to skin diving and snorkeling. It is not designed for
use during scuba diving.
• Never operate the buttons of the watch while underwater or while floating on the
water’s surface.
About This Manual
• Button operations are indicated using the letters shown
in the illustration.
• Each section of this manual provides you with the
information you need to perform operations in each
mode. Further details and technical information can be
found in the “REFERENCE” section.
Before Skin Diving/Snorkeling
• Before beginning skin diving or snorkeling, check to make sure that neither of
the following is on the display.
L ERROR message (indicating sensor malfunction)
L BATT message (indicating low battery power)
• Make sure that the watch is set to the correct time of day.
• Check the glass, case and band for cracks or chips.
• Make sure that the band is fastened securely around your wrist.
While Skin Diving/Snorkeling
• The indicator ERROR on the display may indicate bad data.
• To avoid scratching the watch, take care when skin diving/snorkeling near
rocks or coral.
GENERAL GUIDE
• Press C to change from mode to mode.
• In any mode (except for the Stopwatch Mode), press B to illuminate the display.
Altimeter Mode
Depth Gauge Mode
Barometer Mode
Timekeeping Mode
L
Sensor
Press C.
Stopwatch Mode
Alarm Mode
Note
TIMEKEEPING
The watch does not make any allowance for leap years. Be sure to make the
necessary changes to the date setting to allow for February 29 during a leap year.
Use the Timekeeping Mode to set and view the current time and date.
• You can display either of two screen formats in the Timekeeping Mode: a Time and
Date screen or a Time and Pressure Graph screen. Press D in the Timekeeping
Mode to toggle between the two screens.
Time and Date Screen
Month – Day
Time and Pressure
Graph Screen
BAROMETER
This watch uses a pressure sensor to measure air pressure (barometric pressure).
There are two types of measurements: regular barometric pressure readings and
Barometer Mode barometric pressure readings, which are described below.
• You can calibrate the pressure sensor if you suspect the barometric pressure
reading is incorrect.
Press D.
Day of
the week
Important!
The pressure sensor built into this watch measures changes in air pressure, which
you can then apply to your own weather predictions. It is not intended for use as a
precision instrument in official weather prediction or reporting applications.
PM indicator
Seconds
Hour : Minutes
To reset the seconds count to zero
1. While the Time and Date screen is on the display in the Timekeeping Mode, hold
down A until the second’s digits start to flash, which indicates the setting screen.
2. Press D to reset the seconds count to 00.
Regular Barometric Pressure Readings
The watch takes regular barometric pressure readings every three hours starting from
midnight each day. The data produced by these readings is used for the graphic
display and barometric pressure graph in the Timekeeping Mode.
• Measurements are taken nine, six, and three seconds before each of the regular
measurement times.
• Pressing D while the seconds count is in the range of 30 to 59 resets the
seconds to 00 and adds 1 to the minutes. In the range of 00 to 29, the minutes
count is unchanged.
3. Press A to exit the setting screen.
• The watch calculates the average of the three readings, and displays the result.
• Regular barometric pressure readings are different from the readings taken in the
Barometer Mode. Regular barometric pressure readings are used as the data for the
barometric pressure graph and graphic indicator on the Time and Pressure Graph
Screen in the Timekeeping Mode.
To set the time and date
1. While the Time and Date screen is on the display in the
Timekeeping Mode, hold down A until the second’s
digits start to flash, which indicates the setting screen.
To display regular barometric pressure reading graphics
In the Timekeeping Mode, press D to display the Time and Pressure Graph Screen
for the regular barometric pressure readings.
• The barometric pressure graph shows the relative changes between readings for the
past 18 hours. The flashing marker on the right indicates the latest reading.
2. Press C to move the flashing around the display in the sequence shown below to
Example: 10:58pm
select other settings.
Graphic indicator
3:00am – 6:00am – 9:00am – Noon – 3:00pm – 6:00pm – 9:00pm
Minutes
Month
Seconds
Hour
Up
No change
Down
Day of the week
Day
3. While a setting is flashing, press D (+) to change it.
• While any setting is flashing on the display, press B to toggle between 12-hour
timekeeping and 24-hour timekeeping.
Barometric Pressure Graph
4. Press A to exit the setting screen.
2413-3
DEPTH GAUGE
STOPWATCH
The pressure sensor of the watch can also be used to take underwater depth
measurements while skin diving or snorkeling. Depth is displayed up to 30 meters (99
feet).
The stopwatch lets you measure elapsed time, split times,
and two finishes.
• The display range of the stopwatch is 23 hours, 59
minutes, 59.99 seconds.
Important!
• The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
• The stopwatch measurement operation continues even
if you exit the Stopwatch Mode.
• All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing C.
• Never use this watch to measure depth while scuba diving.
• Leaving the watch in the Depth Gauge Mode while not in the water uses up battery
power. Exit the Depth Gauge Mode whenever you are not using it.
• See “Depth Gauge Mode” for more information.
Hours
Seconds
Minutes
Depth Gauge Mode Screen
Depth measurement starts after you enter the Depth Gauge Mode, with a new reading
taken every three seconds.
Mode
indicator
1/100 second
To measure times with the stopwatch
Elapsed Time
To perform a depth measurement
Just before starting your dive, press C to enter the Depth
Gauge Mode.
• Depths are displayed in 0.1-meter (1-foot) units.
• The mode indicator flashes while a measurement
operation is in progress.
• The depth reading is automatically reset to zero
whenever you enter the Depth Gauge Mode.
D
L
D
D
L
Stop
LB
Clear
D
L
Start
Stop
Re-start
Split Time
B
L
B
L
LD
Stop
LB
Clear
D
• The depth reading shows 0.0 meters (0 feet) when the
watch is submerged at a depth of 0 to 1 meter (0 to 3
feet).
• You can change the unit of measurement for the
displayed depth values between meters (M) and feet
(F). See “To specify the depth measurement unit”.
Depth value
Start
Split
Split release
Mode indicator
Timekeeping
Mode time
Two Finishes
B
L
B
L
D
Start
LB
Split
LD
Clear
Stop
Split release
First runner
finishes.
Display time of
first runner.
Second runner
finishes.
Display time of
second runner.
• When a depth of 30 meters (99 feet) is exceeded, the message FULL appears on
the display. The depth value reappears when the depth reading returns to the
measurable range.
Enters the Depth Gauge
Mode (Measurement start)
Display: 0
REFERENCE
Depth = 1 meter
(3 feet)
Display:
Actual depth
This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
Sensor Data Errors
Whenever a sensor problem, poor electrical contact, or
other abnormality occurs during a barometric pressure,
altitude, or depth measurement operation, the watch
beeps for about three seconds and the ERROR indicator
starts to flash on the display to indicate a sensor error. All
measurement operations are disabled while the ERROR
indicator is on the display.
Note
You cannot exit the Depth Gauge Mode while any reading other than 0.0 meters (or
feet) is on the display. See “Depth Gauge Measurement Precautions” for more
information.
Depth Gauge Mode Graphic Indicator
In the Depth Gauge Mode, the graphic indicator shows
Graphic indicator
(Indicates 5m)
the current depth.The first bar appears on the right of the
If the ERROR indicator appears, press C to change to
another mode, and then return to the mode where the
error occurred. If the ERROR indicator appears again, it
could mean that the watch is malfunctioning. Contact the
store or dealer where you purchased the watch.
indicator when depth reaches 1 meter (3 feet). One more
bar appears with each additional 1 meter (3 feet) of depth,
up to 30 meters (99 feet).
Low Battery Indicator
If the cause of the low battery indicator is due to cold
conditions (about –10°C/14°F), normal operation should
return after the watch is brought back to normal
temperature.
If the cause of the low battery indicator is due to low
battery power (indicated when BATT appears under
normal temperatures), you should have the watch’s
batteries replaced as soon as possible.
ALARM
You can set a Daily Alarm that sounds at the same time
each day, while the alarm is turned on.You can also turn
on an Hourly Time Signal that causes the watch to beep
twice every hour on the hour.
• All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing C.
Auto Return Features
• After you perform an operation in any mode, pressing C returns to the Timekeeping
Mode.
• If you leave the watch for about one hour without performing any button operation in
the Barometer Mode or Altimeter Mode, or in the Depth Gauge Mode with a current
depth reading of 0, the watch beeps and returns to the Timekeeping Mode.
• If you leave a screen with flashing digits on the display for two or three minutes
without performing any operation, the watch saves anything you have input up to
that point and exits the setting screen.
To set the alarm time
Alarm time
1.In the Alarm Mode, hold down A until the hour digits of
the alarm time start to flash, which indicates the setting
screen.
(Hour : Minutes)
Mode
indicator
Alarm on indicator/
Hourly time signal
on indicator
• Displaying the alarm time setting screen turns on the
Daily Alarm.
Setting Scrolling
The D and B buttons are used in various setting screens to scroll through settings
on the display. In most cases, holding down either of these buttons scrolls through
settings at high speed.
2. Press C to move the flashing between the hour and minute’s digits, and then use
D (+) to change the flashing digits.
• When setting the alarm time using the 12-hour format, take care to set the time
12-hour/24-hour Timekeeping Formats
The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is also
applied in all modes.
correctly as am (no indicator) or pm (P indicator).
3. Press A to exit the setting screen.
• With the 12-hour format, the P (PM) indicator appears to the left of the hour digits for
times in the range of noon to 11:59 p.m. and no indicator appears to the left of the
hour digits for times in the range of midnight to 11:59 a.m.
• With the 24-hour format, times are displayed in the range of 0:00 to 23:59, with 24H
indicator.
Daily Alarm Operation
The alarm sounds at the preset time each day for about 20 seconds (in all modes) or
until you stop it by pressing any button.
To test the alarm
In the Alarm Mode, hold down D to sound the alarm.
To turn the Daily Alarm and Hourly Time Signal on and off
In the Alarm Mode, press D to cycle through the on and off settings as shown below.
[Alarm On indicator/Hourly Time Signal On indicator]
Daily Alarm
Only
HourlyTime
Signal only
Both On
Both Off
2413-4
Altimeter Mode
Calibrating a Barometric Pressure Value and Specifying a Measurement
Unit
How does the altimeter work?
The pressure sensor of this watch is calibrated at the factory before shipment and
further adjustment is normally not required. If you notice serious errors in the
barometric pressure readings produced by the watch, you can calibrate the sensor to
correct the errors.
Generally, air pressure and temperature decrease as altitude increases. Under its
factory defaut setting, this watch bases its altitude measurements on International
Standard Atmosphere (ISA) values stipulated by the International Civil Aviation
Organization (ICAO). These values define relationships between altitude, air pressure,
and temperature.
Important!
Incorrectly calibrating the barometric pressure sensor can result in incorrect readings.
Before performing the calibration procedure, compare the readings produced by the
watch with those of another reliable and accurate barometer.
Altitude
Air Pressure
Temperature
616 hPa/mb
701 hPa/mb
795 hPa/mb
899 hPa/mb
1013 hPa/mb
–11°C
About 8 hPa/mb per 100 m
About 9 hPa/mb per 100 m
4000 m
3500 m
2500 m
1500 m
500 m
To calibrate the barometric pressure value
1. Press C to enter the Barometer Mode.
2. After the result of the current measurement appears,
hold down A until the barometric pressure value starts
to flash. This indicates the barometric value setting
screen.
–4.5°C
3000 m
2000 m
About 6.5°C
per 1000 m
2°C
8.5°C
15°C
About 10 hPa/mb per 100 m
About 11 hPa/mb per 100 m
1000 m
0 m
About 12 hPa/mb per 100 m
3. Use D (+) and B (–) to change the value in 1hPa/mb
(0.05inHg) increments.
Source: International Civil Aviation Organization
• You can calibrate the barometric pressure value in the
range of 600 to 1100hPa/mb (17.70 inHg to
32.45inHg).
Altitude
Air Pressure
Temperature
• Pressing B and D at the same time displays
“xxxx”, which indicates factory preset calibration.
4. Press A to exit the setting screen.
14000 ft
12000 ft
10000 ft
8000 ft
19.03 inHg
22.23 inHg
25.84 inHg
29.92 inHg
16.2°F
30.5°F
About 0.15 inHg per 200 ft
About 0.17 inHg per 200 ft
About 0.192 inHg per 200 ft
About 3.6°F
per 1000 ft
6000 ft
44.7°F
59.0°F
• When you press A to exit the setting screen after changing the barometric
pressure setting, numbers cycle on the display at high speed for about nine
seconds. This does not indicate malfunction. It indicates that the watch is
performing internal calibration.
4000 ft
0 ft
2000 ft
About 0.21 inHg per 200 ft
Source: International Civil Aviation Organization
How is altitude expressed?
To specify the barometric pressure unit
1. Press C to enter the Barometer Mode.
2. After the result of the current measurement appears,
hold down A until the barometric pressure value starts
to flash. This indicates the barometric value setting
screen.
There are two standard methods of expressing altitude: absolute altitude and relative
altitude. Absolute altitude expresses an absolute height above sea level. Relative
altitude expresses the difference between the height of two different places.
3. Press C to toggle the measurement unit between
hPa/mb and inHg.
4. Press A to exit the setting screen.
Height of building 130 m
(relative altitude)
Rooftop at an altitude of
230 m above sea level
(altitude above sea level)
Specifying the Measurement Unit
To specify the altitude unit
Sea
Important!
You cannot set the reference altitude value and specify the altitude measurement unit
during the same procedure.You must complete one operation (reference altitude
value setting, for example), exit the setting screen, and then start the other operation
(altitude measurement unit specification, in this example).
Depth Gauge Mode
About depth and water pressure
Water pressure increases with depth. In the case of sea water (specific
gravity=1.025), water pressure increases by 1 ATM (1.03 kg/cm2) with each 10 meters
(33 feet) of depth.
This watch makes use of the relationship between pressure and depth, using a
pressure sensor to calculate the water pressure and then converting this data into
depth readings.
1. Press C to enter the Altimeter Mode.
2. After the result of the current measurement appears,
hold down A until the altitude value starts to flash. This
indicates the reference altitude value setting screen.
3. Press C to toggle the measurement unit between
meters (M) and feet (F).
Depth Gauge Measurement Precautions
4. Press A to exit the setting screen.
You cannot exit the Depth Gauge Mode or change the measurement unit setting while
the depth reading on the display is any value other than zero.This is to prevent
accidental switching from the Depth Gauge Mode while underwater.
• If you change the altitude measurement unit (M or F)
after setting a reference altitude, the Altimeter Mode
performs altitude measurements based on factory
default settings.
Automatic Zero Depth Reset
The initial displayed depth reading is zero whenever you enter the Depth Gauge
Mode, even if you are underwater. Because of this, you should enter the Depth Gauge
Mode just before starting your dive. Do not enter the Depth Gauge Mode while
underwater.
To specify the depth measurement unit
Important!
You cannot change the depth measurement unit when the depth reading is any value
other than zero.
Manual Zero Depth Reset
1. Press C to enter the Depth Gauge Mode.
2. Hold down A until the current measurement unit starts
to flash. This indicates the measurement unit setting
screen.
3. Press C to toggle the measurement unit between
meters (M) and feet (F).
In some cases, such as when the sensor is exposed to
wide changes in temperature, the display may show a
depth of greater than 1.0 meter (3 feet) even when you
are on the surface. In this case, hold down C and D at
the same time to reset the depth reading to zero.
4. Press A to exit the setting screen.
Backlight Precautions
The backlight uses an EL (electro-luminescent) panel that causes the entire display to
glow for easy reading in the dark. In any mode (except for the Stopwatch Mode),
press B to illuminate the display for about one second.
• The backlight does not turn on if you press B while a setting screen is on the
display.
• The electro-luminescent panel that provides illumination loses power after very long
use.
• The watch may emit an audible sound whenever the display is illuminated. This is
due to vibration of the EL panel used for illumination, and does not indicate
malfunction.
• The illumination provided by the backlight may be hard to see when viewed under
direct sunlight.
• The backlight turns off whenever an alarm sounds.
• The backlight remains lit for about one second from the point you press the button,
even if it is already lit when you press the button. If you keep the button depressed
for one second or more, the backlight turns off.
• Frequent use of the backlight shortens battery life.
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