Casio 2413 User Manual

Module No. 2413

3:00am – 6:00am – 9:00am – Noon – 3:00pm – 6:00pm – 9:00pm

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.

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.

Before Skin Diving/Snorkeling

• Before beginning skin diving or snorkeling, check to make sure that neither of
the following is on the display.

❑ ERROR message (indicating sensor malfunction)
❑ 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.

2413-1

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.

About This Manual

Altimeter Mode

• 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.

Depth Gauge Mode

Timekeeping Mode

Sensor

Press C.

Barometer Mode

▲

▲

TIMEKEEPING

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

Date

screen or a

Mode to toggle between the two screens.

Day of
the week

PM indicator

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

• Pressing D while the seconds count is in the range of 30 to 59 resets the

seconds to
count is unchanged.

3. Press A to exit the setting screen.

To set the time and date

2. Press C to move the flashing around the display in the sequence shown below to
select other settings.

Time and Pressure Graph

Time and Date Screen Time and Pressure

Hour : Minutes

00 and adds 1 to the minutes. In the range of 00 to 29, the minutes

Seconds Hour

Month – Day

Seconds

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.

screen. Press D in the Timekeeping

Graph Screen

Press D.

▲

▲

00.

Minutes

Time and

▲

▲

▲

Stopwatch Mode

Alarm Mode

▲

Note

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.

BAROMETER

This watch uses a pressure sensor to measure air pressure (barometric pressure).
There are two types of measurements:

Barometer Mode barometric pressure readings

• You can calibrate the pressure sensor if you suspect the barometric pressure
reading is incorrect.

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.

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.

• 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 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.

Graphic indicator

regular barometric pressure readings

, which are described below.

Example: 10:58pm

and

Day of the week

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.

4. Press A to exit the setting screen.

Day

Month

▲

No change

Up

Down

Barometric Pressure Graph

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• Each mark on the graphic indicator indicates the relative change between the latest
barometric reading and the one before it.

+– 0

more than
11hPa/mb down

6 – 10hPa/mb
down

4 – 5hPa/mb
down

2 – 3hPa/mb
down

• The examples on the left indicate that the latest reading is less than the previous
one, while those on the right indicate the latest reading is greater.

Barometric Pressure Graph

Barometric pressure indicates changes in the atmosphere. By monitoring these
changes you can predict the weather with reasonable accuracy. The following shows
how to interpret the data that appears on the barometric pressure graph.

more than
11hPa/mb up

6 – 10hPa/mb
up

4 – 5hPa/mb up

2 – 3hPa/mb up

1hPa/mb down or
1hPa/mb up

A rising graph generally means improving weather.

A falling graph generally means deteriorating weather.

Note that if there are sudden changes in weather or temperature, the graph line of
past measurements may run off the top or bottom of the display. The entire graph will
become visible once barometric conditions stabilize.
If any of the conditions listed below is present during one of the regular 3-hour
measurements, a blank is inserted into the graph in place of a mark. The next time a
successful reading is obtained (during a regularly scheduled 3-hour measurement),
the current reading is compared with the last successful reading and the
corresponding mark is added to the graph.

• Sensor data error (ERROR flashing on the display)

• Low battery power (BATT flashing on the display)

• Reading outside of measurement range (

▲

Noon 3pm 6pm

Barometer Mode Screen

A measurement cycle starts after you enter the Barometer Mode, with readings being
taken every three seconds for the first four or five minutes. After that, readings are
taken every minute.
Measurements you take in the Barometer Mode do not affect the barometric pressure
information that appears on the Timekeeping Mode Screens. This means you can use
the Timekeeping Mode Screen to see trends over a longer span, and the Barometer
Mode to find out barometric pressure changes over a shorter term.

To start a barometric pressure measurement cycle

Graphic indicator

Barometric pressure

Mode indicator

• Some countries express barometric pressure in units of millibars (mb) instead of
hecto-pascal (hPa). It really makes no difference, because 1hPa = 1mb. In this
manual, we use hPa/mb or hPa (mb).

• You can change the measured barometric pressure unit between hecto-pascals/
millibars (hPa/mb) and inchesHg (inHg). See “To specify the barometric pressure
unit” for details.

• The message
reading is outside the measurable range of 600hPa/mb to 1100hPa/mb (17.70inHg
to 32.45inHg). The barometric pressure value reappears when the barometric
pressure reading returns to the measurable range.

Timekeeping
Mode time

FULL appears on the display whenever the barometric pressure

Barometer Mode Graphic Indicator

Graphic indicator
(Indicates 1018hPa/mb)

Press C to enter the Barometer Mode. After a few
seconds, the result of the current barometric pressure
reading appears on the display.

• Barometric pressure is displayed in units of 1hPa/mb (or

0.05inHg).

• The mode indicator flashes while a measurement
operation is in progress.

• While a barometric pressure measurement operation is
in progress in the Barometer Mode, press D to stop the
current operation and restart a new measurement cycle.

In the Barometer Mode, the graphic indicator shows the
current barometric pressure. Segments are darkened in
the graphic indicator from the left (lower pressure) to the
right (higher pressure).

• In the range of 600 to 950hPa/mb each rise of 35hPa/
mb causes one more segment to be darkened. In the
range of 951 to 1045hPa/mb, each rise of 5hPa/mb
causes one more segment to be darkened. All segments
are darkened when the barometric pressure is 1046hPa/
mb or greater.

• When the barometric pressure unit is set to inHg, the
watch actually measures in hPa/mb units and then
converts to inHg. Because of this, the graphic indicator
will show the hPa/mb value before switching to the
corresponding inHg value.

FULL on the display)

▲

ALTIMETER

A built-in altimeter uses a pressure sensor to detect the current air pressure, which is
then used to estimate the current altitude. The watch is pre-programmed with ISA
(International Standard Atmosphere) preset values, which are used to convert air
pressure readings to altitude values. If you preset a reference altitude, the watch will
also calculate the current relative altitude based on your preset value.

Important!

• This watch estimates altitude based on air pressure. This means that altitude
readings for the same location may vary if air pressure changes.

• Do not rely upon this watch for altitude measurements or perform button operations
while engaging in sports where there are sudden altitude changes, while sky diving,
hang gliding, or paragliding, or while riding a gyrocopter, glider, or any other aircraft.

• Note that the following conditions will prevent you from obtaining accurate readings:

When air pressure changes because of changes in the weather
Extreme temperature changes
When the watch itself is subjected to strong impact

• In order to avoid measurement problems caused by differences in the watch’s
temperature, be sure to wear the watch so that it comes into direct contact with your
skin.

• Do not use this watch for measuring altitude in applications that demand
professional or industrial level precision.

How the Altimeter Works

The watch measures
You can set a reference altitude using zero reset, or by specifying an altitude value
from a map, sign post, etc.

• After you set the reference altitude, the watch adjusts its air pressure to altitude
conversion calculation accordingly.

Setting a Reference Altitude Value

With this method, you can specify a current altitude value you obtain from a map or
signpost. Then the watch measures altitude relative to the value you set.

• When mountain climbing, you can set the reference value in accordance with a
marker along the way or altitude information from a map.

• The altitude measurements produced by this watch are subject to error caused by
changes in air pressure. Because of this, we recommend that you update the
reference altitude whenever one is available during your climb.

To set a reference altitude value

1. Press C to enter the Altimeter Mode, and wait for a few seconds until the current

altitude value appears on the display.

2. Hold down A until the current altitude value starts to flash. This indicates the

reference altitude setting screen.

3. Use D (+) and B (–) to change the displayed value in 5-meter (20-foot)

increments.

• You can set a reference altitude value in the range of 0 to 4000 meters (0 to
13120 feet).

4. Press A to exit the setting screen.

• After you press A, the numbers on the display indicate that the watch is making
internal adjustments. This operation takes about nine seconds. Once adjustments
are finished, the altitude display appears.

Reference Altitude Zero Reset

With zero reset, you can set the reference altitude to zero. The watch then measures
altitude relative to zero.

• To determine the height of a tall building, set the reference altitude to 0 on the
ground floor. Note, however, that you may not be able to get a good reading if the
building is pressurized or air-conditioned.

• Before beginning a climb up a mountain, you could set the reference altitude to 0m
at the foot of the mountain. This makes it possible to determine the difference in
altitude between the reference point and your destination.

To zero reset the reference altitude

1. Press C to enter the Altimeter Mode, and wait for a few seconds until the current

altitude value appears on the display.

2. Hold down A until the current altitude value starts to flash. This indicates the

reference altitude setting screen.

3. Press B and D at the same time to change the displayed value to zero.

4. Press A to exit the setting screen.

• After you press A, the numbers on the display indicate that the watch is making
internal adjustments. This operation takes about nine seconds. Once adjustments
are finished, the altitude display appears.

Using the Altimeter Mode

A measurement cycle starts after you enter the Altimeter Mode, with readings being
taken every three seconds for the first four or five minutes. After that, readings are
taken every minute.

Graphic indicator
(Indicates 1550m)

Altitude

Mode
indicator

• The message FULL appears whenever the altitude reading is outside the display
range of –4000 to +4000 meters (–13120 to +13120 feet). The altitude value
reappears when the altitude reading returns to the measurable range.

• In the Altimeter Mode, the graphic indicator shows the current altitude. Segments
are darkened in the graphic indicator from the left (lower altitude) to the right (higher
altitude). In the range of 5 to 1000 meters (20 to 4000 feet), each increase of 45
meters (180 feet) causes one more segment to be darkened. In the range of 1005 to
2800 meters (4020 to 9400 feet), each increase of 195 meters (580 feet) causes
one more segment to be darkened. All segments are darkened when the altitude is
2805 meters (9420 feet) or greater.

relative altitudes

Timekeeping
Mode time

in relation to a

• Altitude is displayed in 5-meter (20-foot) units.

• The mode indicator flashes while a measurement

operation is in progress.

• While an altitude measurement operation is in progress
in the Altimeter Mode, press D to stop the current
operation and restart a new measurement cycle.

• The measured altitude may be a negative value in
cases where there is a reference altitude value set or
because of certain atmospheric conditions.

• You can change the unit of measurement for the
displayed altitude values between meters (M) and feet
(F). See “To specify the altitude unit”.

reference altitude

set by you.