USER’S GUIDE 2471
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.
Expose the watch to bright light to charge its battery before using it.
You can use this watch even as its battery is being charged by exposure to
bright light.
••
• Be sure to read “Battery” of this manual for important information
••
you need to know when exposing the watch to bright light.
Applications
The built-in sensors of this watch measure direction, altitude, barometric
pressure, and temperature. Measured values are then shown on the display.
Such features make this watch useful when hiking, mountain climbing, or
when engaging in other such outdoor activities.
• The measurement functions built into this watch are not intended for
taking measurements that require professional or industrial precision.
Values produced by this watch should be considered as reasonable
representations only.
• When engaging in mountain climbing or other activities in which losing
your way can create a dangerous or life-threatening situation, always be
sure to use a second compass to confirm direction readings.
• CASIO COMPUTER CO., LTD. assumes no responsibility for any loss,
or any claims by third parties that may arise through the use of this
watch.
Warning!
If the display of the watch is blank...
• The initial factory default setting is Power Saving on.
• The watch recovers from the sleep state if you move it to a well-lit area
you press any button, or if you angle the watch towards your face for
reading.
It can take up to five seconds for the display to turn on.
*
• See “Power Saving Function” for more information.
About This Manual
(Light)
If the SLEEP indicator is on the display (either
flashing or steady), it means that the display is
blank because the watch's Power Saving function
has shut it to conserve power. Power Saving
automatically turns off the display and puts the
watch into a sleep state whenever your watch is
left in an area where it is dark for a certain
period.
• 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.
, if
*
General Guide
• The illustration below shows which buttons you need to press to navigate
between modes.
Data Recall Mode
Timekeeping Mode
Press D.
▲
▲
D
Alarm Mode
D
▲
▲
Timekeeping
PM indicator
Day of week
Year
Hour : Minutes
3. When the setting you want to change is flashing, use E to change it as
described below.
Seconds
Month – Day
Seconds
Power Saving
on/off
Setting
Seconds
Hour, Minutes
12/24-Hour
format
Year, Month,
Day
Day of week
Power Saving
on/off
4. Press A to exit the setting screen.
Use the Timekeeping Mode to set and view the
current time and date.
To set the time and date
1. In the Timekeeping Mode, hold down A until
the seconds start to flash, which indicates the
setting screen.
2. Press D to move the flashing in the
sequence shown below to select other
settings.
Minutes
Month
Day
Button Operations
Screen
Hour
Day of
week
Press E to reset the seconds to
Use E (+) to change the setting.
Use E to toggle between 12-hour (12H) and
24-hour (24H) timekeeping.
Use E (+) to change the setting.
Use E (+) to change the setting.
Press E to toggle the Power Saving on
(On) and off (OFF).
12/24-Hour
Format
Year
0000
00.
0000
• You can use buttons B, C, and E to directly enter a sensor mode from
the Timekeeping Mode or from another sensor mode. To get to a sensor
mode from the Data Recall or Alarm Mode, you must go to the Timekeeping
Mode first.
Sensor Modes
Press B.
▲
Digital Compass Mode
Press C.
Thermometer Mode
▲
Barometer/
Press D.
Press E.
Altimeter Mode
▲
Digital Compass
A built-in bearing sensor detects magnetic north and indicates one of 16
directions on the display. Direction readings are performed in the Digital
Compass Mode.
• You can calibrate the bearing sensor if you suspect the direction reading is
incorrect.
To enter and exit the Digital Compass Mode
1. While in the Timekeeping, Barometer/Thermometer, or Altimeter Mode,
press B to enter the Digital Compass Mode.
• At this time, the watch immediately starts a Digital Compass operation.
After about two seconds, letters appear on the display to indicate the
direction that the 12 o’clock position of the watch is pointing.
2. Press D to return to the Timekeeping Mode.
To take a direction reading
Magnetic north pointer
12 o’clock position
Direction
Timekeeping Mode time
Direction value (in degrees)
WSW
SW
NNW
NW
W
N
W
W
W
S
S
S
E
S
E
E
S
S
SE
1. Enter the Digital Compass Mode.
2. Place the watch on a flat surface or (if you are
wearing the watch), make sure that your wrist
is horizontal (in relation to the horizon).
3. Point the 12 o’clock position of the watch in
the direction you want to measure.
4. Press B to start a Digital Compass
measurement operation.
• After about two seconds, the direction that the
12 o’clock position of the watch is pointing
appears on the display.
• Also, four pointers appear to indicate magnetic
north, south, east, and west.
• After the first reading is obtained, the watch
0°
N
N
continues to take direction readings
N
E
automatically each second, for up to 20
NE
E
seconds.
N
E
E
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USER’S GUIDE 2471
• The COMP indicator flashes on the display while a measurement is in
progress.
• The direction value that appears on the display represents the clockwise
angle formed between magnetic north (which is 0 degrees) and the
displayed direction.
Note
• Note that taking a measurement while the watch is not horizontal (in
relation to the horizon) can result in large measurement error.
• The margin of error for the direction value is ±11 degrees. If the indicated
direction is northwest (NW) and 315 degrees, for example, the actual
direction can be anywhere from 304 to 326 degrees.
• Digital Compass operation is automatically interrupted whenever an alarm
(Daily Alarm or Hourly Time Signal) sounds. If this happens, start the Digital
Compass operation again from the beginning.
• The following table shows the meanings of each of the direction
abbreviations that appear on the display.
Direction
Meaning
N
E
S
W
• See “Digital Compass Precautions” for other important information about
taking direction readings.
North
East
South
West
Direction
NNE
ESE
SSW
WNW
Meaning
North-
northeast
East-
southeast
South-
southwest
West-
northwest
Direction
NE
SE
SW
NW
Meaning
Northeast
Southeast
Southwest
Northwest
Direction
ENE
SSE
WSW
NNW
Meaning
East-
northeast
South-
southeast
West-
southwest
North-
northwest
Barometer/Thermometer
This watch uses a pressure sensor to measure air pressure (barometric
pressure) and a temperature sensor to measure temperature.
• You can calibrate the temperature sensor and the pressure sensor if you
suspect that readings are incorrect.
To take Barometric Pressure and Temperature Readings
Barometric pressure graph
(unit: 1hPa (mb)/0.05 inHg)
Temperature
Barometric pressure
• The displayed barometric pressure value changes toxxxx hPa/mb (or
inHg) if a measured barometric pressure falls outside the range of 260 hPa/
mb to 1100 hPa/mb (7.65 inHg to 32.45 inHg). The barometric pressure
value will be displayed again as soon as the measured barometric pressure
is within the allowable range.
• The displayed temperature value changes to
measured temperature falls outside the range of –10.0°C to 60.0°C (14.0°F
to 140.0°F). The temperature value will be displayed again as soon as the
measured temperature is within the allowable range.
• Some countries refer to the barometric pressure unit hecto-pascal (hPa) as
millibars (mb). It really makes no difference, because 1hPa = 1mb. In this
manual, we use hPa/mb or hPa (mb).
• See “About Barometric and Temperature Measurements” for important
precautions.
Barometric Pressure Graph
Barometric pressure indicates changes in the atmosphere. By monitoring
these changes you can predict the weather with reasonable accuracy. The
barometric pressure graph shows the barometric readings for the past 26
hours. The flashing point on the right of the display is the point for the newest
measurement. Note that pressure graph readings are relative to the newest
measurement point. One dot above the newest point is plus 1hPa(mb)/
0.05 inHg, while one dot below is minus 1hPa(mb)/0.05 inHg. The following
shows how to interpret the data that appears on the barometric pressure
graph.
Pressing C in the Timekeeping Mode or in any
of the other sensor modes enters the Barometer/
Thermometer Mode. The watch automatically
starts barometric pressure and temperature
measurement, and displays the results.
• Barometric pressure is displayed in units of
1hPa/mb (or 0.05 inHg).
• Temperature is displayed in units of 0.1°C (or
0.2°F).
xx. x °C (or °F) if a
A rising graph generally means improving 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.
The following conditions cause the barometric pressure
measurement to be skipped, with the corresponding point on
the barometric pressure graph being left blank.
• Barometric reading that is out of range (260 hPa/mb to 1,100 hPa/mb or
7.65 inHg to 32.45 inHg)
• Sensor malfunction
• Dead batteries
About Barometric and Temperature Measurements
• Barometric pressure and temperature measurement operations are
performed as soon as you enter the Barometer/Thermometer Mode. After
that, barometric pressure and temperature measurements are taken every
five seconds for the first three minutes.
• The BARO indicator flashes on the display while a measurement is in
progress.
• The barometer automatically takes measurements every two hours (starting
from midnight), regardless of what mode you are in. The results of these
measurements are used for the barometric pressure graph.
• You can also perform a barometric pressure and temperature measurement
at any time by pressing C in the Barometer/Thermometer Mode.
Barometer and Thermometer Precautions
• 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.
• Sudden temperature changes can affect pressure sensor readings.
• Temperature measurements are affected by your body temperature (while
you are wearing the watch), direct sunlight, and moisture. To achieve a
more accurate temperature measurement, remove the watch from your
wrist, place it in a well ventilated location out of direct sunlight, and wipe off
all moisture from the case. It takes approximately 20 to 30 minutes for the
case of the watch to reach the actual surrounding temperature.
• You can change the measured barometric pressure unit between hectopascals/millibars (hPa/mb) and inchesHg (inHg). See “Changing the
Barometric Pressure and Temperature Units” for details.
• You can change the measured temperature value displayed by this watch
between Celsius (°C) and Fahrenheit (°F). See “Changing the Barometric
Pressure and Temperature Units”.
Not visible 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 preprogrammed 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. Altimeter functions also include data
storage memory and an altitude alarm.
Important!
• This watch estimates altitude based on air pressure. This means that
altitude readings for the same location may vary if air pressure changes.
• This watch employs a semiconductor pressure sensor, which is affected by
temperature changes. When taking altitude measurements, be sure to do
so while ensuring that the watch is not exposed to temperature changes.
• To avoid the effect of sudden temperature changes on measurement, wear
the watch so it is in direct contact with your wrist during measurement.
• 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.
• Do not use this watch for measuring altitude in applications that demand
professional or industrial level precision.
• Remember that the air inside of a commercial aircraft is pressurized.
Because of this, the readings produced by this watch will not match the
altitude readings announced or indicated the flight crew.
How the Altimeter Works
With the Preset Values (No Reference Altitude)
• The watch measures the air pressure at your current location and uses the
built-in ISA values to convert it to the equivalent altitude.
A falling graph generally means deteriorating weather.
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USER’S GUIDE 2471
With a Reference Altitude
• If you set a reference altitude, the watch
uses that value when calculating altitude
based on air pressure.
• 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.
• When mountain climbing, you can set the
reference value in accordance with a
marker along the way or altitude
information from a map. After you do this,
the altitude readings produced by the
watch will be more accurate than they
would without a reference altitude.
A
400
B
To take an altitude reading
Pressing E in the Timekeeping Mode or in any of the other sensor modes
enters the Altimeter Mode. The watch automatically starts altitude
measurement, and displays the results.
Altitude graph (current altitude flashing) (unit: 10m/40 ft.)
Altitude
About one
second later
▲
Timekeeping Mode time
• See “About Altitude Measurements” for important information.
• Altitude is displayed in units of 5 meters (20 feet).
• The measurement range for altitude is –700 to 10,000 meters (–2,300 to
32,800 feet).
• The measured altitude may be a negative value in cases where there is a
reference altitude value set or because of certain atmospheric conditions.
• The displayed altitude value changes to
measured altitude falls outside the measurement range. The altitude value
will be displayed again as soon as the measured altitude is within the
allowable range.
• You can change the unit of measurement for the displayed altitude values
between meters (m) and feet (ft). See “To change the Altitude Units”.
About Altitude Measurements
There are two types of altitude measurements: those for displayed data
(Altimeter Mode measurements) and those for memory data (Memory
measurements).
Altimeter Mode measurement
You can perform Altimeter Mode measurements in the Altimeter Mode only,
and an altimeter measurement operation starts whenever you enter the
Altimeter Mode.
During the first three minutes after entering the Altimeter Mode, ALTI flashes
on the display and measurements are taken every five seconds. After that,
the interval between measurements depends on whether you are using the
Short Mode (1-minute intervals) or the Long Mode (2-minute intervals).
• Long Mode is the default setting. See “Memory measurement” for
information about the Short Mode and Long Mode.
• If you do not perform any operation while in the Altimeter Mode, the watch
automatically returns to the Timekeeping Mode after four or five hours in
the Short Mode, or after nine or 10 hours in the Long Mode.
Memory measurement
The memory measurement operation stores the following data in watch
memory. Note that each time you perform a memory measurement operation,
it creates a new set of records, replacing the set of records currently in
memory. Memory measurement continues to be performed (indicated by the
REC indicator flashing on the display) even if you change to another mode.
Measurement start time, date, and altitude: 1 record
Automatic altitude readings and time, at fixed interval: Up to 39 records
Measurement end time, date, and altitude: 1 record
The watch also calculates the following values using measured data and
maintains one record for each in memory.
Relative altitude (altitude difference between start point and current altitude or
measurement end altitude)
Measurement time
Maximum altitude (highest measured altitude in memory)
Total ascent (total of ascents (A + B))
Cumulative total ascent (total of all measured altitude values in memory)
Maximum altitude
Start point
A
xxxxx meters (or feet) if a
Stop point
B
C
• Starting a new measurement automatically clears relative altitude,
measurement time, maximum altitude, and total ascent values currently in
memory.
• Starting a new measurement does not clear cumulative total ascent. This
value continues to increase until it reaches 99,995 meters (327,983 feet).
After that, it reverts to 0 and starts again.
• The interval between memory measurements depends on whether the
Short Mode or the Long Mode is selected.
Short Mode: 5-minute interval
Long Mode: 15-minute interval
• Relative altitude, cumulative total ascent, and maximum altitude data is
calculated at regular intervals, depending on the Long Mode/Short Mode
setting. In both modes, calculations are performed every five seconds for the
first three minutes. After that, calculations are performed every minute in the
Short Mode and every two minutes in the Long Mode.
To select the Short Mode or Long Mode
1. In the Altimeter Mode, hold down A until the
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display clears. After four or five seconds,
OFF or the current reference altitude
either
value (if set) starts to flash, which indicates
the setting screen.
•
OFF indicates no reference altitude.
• Note that you will not be able to change the
Short/Long Mode setting if a memory
measurement operation is in progress.
2. Press D twice.
• This causes either 0:05 (Short Mode) or
0:15 (Long Mode) to appear, which
indicates the current mode setting.
3. Each press of E toggles between the Short
Mode and Long Mode.
4. Press A to exit the setting screen.
To perform memory measurement
Hold down E for about one second until REC
flashes, which indicates that memory
measurement has started.
• Memory measurement stops automatically
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• While a memory measurement operation is in progress, press A to toggle
between the Standard Altitude screen and the Relative Altitude screen.
Standard Altitude
Screen
Altitude
Note
• REC flashes on the display while a memory measurement operation is in
• Starting the memory measurement operation deletes any altimeter data
• You can recall data in memory using the Data Recall Mode.
Setting a Reference Altitude
After you set a reference altitude, the watch adjusts its air-pressure-to-altitude
conversion calculation accordingly. 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.
Timekeeping Mode time
progress.
(except for cumulative total ascent data) currently in memory (and its graph)
and replaces it with the new data. Note that you cannot delete memory
contents manually.
after there are 41 records accumulated in
memory. When you want to stop a memory
measurement operation manually, hold down
E for about one second until REC disappears.
Relative Altitude
Screen
Relative altitude
Press A.
▲
▲
REL indicator
Measurement time
To set a reference altitude
1. In the Altimeter Mode, hold down A until the
display clears. After four or five seconds,
OFF or the current reference altitude
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either
value (if set) starts to flash, which indicates
the setting screen.
2. Press E (+) or B (–) to change the current
reference altitude value by 5 meters (or 20 feet).
• You can set the reference altitude within the
range of –10,000 to 10,000 meters (–32,800
to 32,800 feet).
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USER’S GUIDE 2471
• Pressing E and B at the same time returns to OFF(no reference
altitude)
, so the watch performs air pressure to altitude conversions
based on preset data only.
3. Press A to exit the setting screen.
About the Altitude Alarm
The altitude alarm sounds for about five seconds when the current altitude
matches a preset value during an altitude measurement operation. You can
press any button to stop the alarm after it starts to sound.
The altitude alarm sounds only while the Altimeter Mode’s Altitude Screen is
on the display. It does not sound while the watch is in another mode or while
another Altimeter Mode screen is on the display.
Example
If you set the altitude alarm at 130 meters, it sounds when you pass the 130meter mark on your way up and on your way back down.
To set the altitude alarm
1. In the Altimeter Mode, hold down A until the
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Altitude alarm value
Altitude
Alarm
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• Pressing E and B at the same time resets the altitude alarm value to O.
4. Press A to exit the setting screen.
display clears. After four or five seconds,
either
OFF or the current reference altitude
value (if set) starts to flash, which indicates
the setting screen.
2. Press D once to move the flashing to the
altitude alarm setting.
• Press D to move the flashing in the
sequence shown below.
Long/Short
Mode Setting
3. Press E (+) or B (–) to change the current
altitude alarm value by 5 meters (or 20 feet).
• You can set the altitude alarm value within
the range of –10,000 to 10,000 meters
(–32,800 to 32,800 feet).
Altitude
Unit
Reference
Altitude
To turn the altitude alarm on and off
1. In the Altimeter Mode, hold down A until the
display clears. After four or five seconds,
either
Altitude alarm on indicator
Current On/Off status
OFF or the current reference altitude
value (if set) starts to flash, which indicates
the setting screen.
2. Press D once to move the flashing to the
altitude alarm setting.
3. Press C to toggle the altitude alarm on (
and off (
4. Press A to exit the setting screen.
• An altitude alarm on indicator appears on the
OFF).
Altimeter Mode’s Altitude Screen while the
altitude alarm is turned on. This indicator does
not appear on any other screen or in any other
mode.
ON)
Data Recall
Use the Data Recall Mode to view memory measurement data.
To view memory measurement data
1. Enter the Data Recall Mode.
2. Press E to cycle through the various data screens in the sequence
shown below.
• To view the cumulative total ascent value, press C.
• If an error occurs during memory measurement, the xxxxx is shown for
the relative altitude in the Data Recall Mode.
Altitude
Recording time (Hour : Minutes)
Alternates at
1-second intervals.
▲
▲
Recording date
(Year, Month – Day)
Start Time Data
▲
Press
C.
▲
Cumulative
Total Ascent
Press E.
▲
Measurement
▲
Data
Total AscentMaximum Altitude
▲
End Time
Data
▲
▲
Relative Altitude
▲
Measurement Time
Alarm
Hourly time signal on
indicator
Alarm on indicator
Timekeeping Mode time
Alarm time (Hour : Minutes)
To set the alarm time
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3. While a setting is flashing, use E to increase it.
• When setting the alarm time using the 12-hour format, take care to set
the time correctly as a.m. (no indicator) or p.m. (P indicator).
4. Press A to exit the setting screen.
Alarm Operation
The alarm sounds at the preset time for about 10 seconds (in all modes), or
until you stop it by pressing any button.
To test the alarm
In the Alarm Mode, hold down E to sound the alarm.
To turn the daily alarm and the Hourly Time Signal on and off
In the Alarm Mode, press E to cycle through the settings shown below.
Alarm On Indicator / Hourly Time Signal On Indicator
Alarm On
Signal On
• The alarm on indicator and the Hourly Time Signal on indicator are shown
on the display in all modes while these functions are turned on.
After you set (and turn on) the daily alarm, the
alarm tone sounds when the alarm time is
reached. You can also turn on an Hourly Time
Signal that causes the watch to beep for about
one second every hour on the hour.
• All of the operations in this section are
performed in the Alarm Mode, which you enter
by pressing D.
1. In the Alarm Mode, hold down A until the
hour setting of the alarm time starts to flash,
which indicates the setting screen.
• This automatically turns on the alarm.
2. Press D to move the flashing between the
hour and minute settings.
Alarm Off
Signal Off
Alarm On
Signal Off
Alarm Off
Signal On
Backlight
Auto light switch on
indicator
The backlight uses an EL (electro-luminescent)
panel that causes the entire display to glow for
easy reading in the dark. The watch’s auto light
switch automatically turns on the backlight when
you angle the watch towards your face.
• The auto light switch must be turned on
(indicated by the auto light switch on indicator)
for it to operate.
• See “Backlight Precautions” for other important
information about using the backlight.
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USER’S GUIDE 2471
To turn on the backlight manually
In any mode, press L to illuminate the display for about two seconds.
• The above operation turns on the backlight regardless of the current auto
light switch setting.
About the Auto Light Switch
Turning on the auto light switch causes the backlight to turn on for about two
seconds, whenever you position your wrist as described below in any mode.
Note that this watch features a “Full Auto EL Light,” so the auto light switch
operates only when available light is below a certain level. It does not turn on
the backlight under bright light.
Moving the watch to a position that is parallel to the ground and then tilting
it towards you more than 40 degrees causes the backlight to turn on.
Parallel to
ground
Warning!
• Always make sure you are in a safe place whenever you are reading
the display of the watch using the auto light switch. Be especially
careful when running or engaged in any other activity that can result
in accident or injury. Also take care that sudden illumination by the
auto light switch does not surprise or distract others around you.
• When you are wearing the watch, make sure that its auto light switch
is turned off before riding on a bicycle or operating a motorcycle or
any other motor vehicle. Sudden and unintended operation of the auto
light switch can create a distraction, which can result in a traffic
accident and serious personal injury.
More than
40
°
To turn the auto light switch on and off
In the Timekeeping Mode, hold down C for about one second to toggle the
auto light switch on (
• Pressing C while in the Timekeeping Mode changes to the Barometer/
Thermometer Mode, but keep C depressed for about one second to turn
the auto light switch on or off. After that, you can return to the Timekeeping
Mode by pressing D.
• The auto light switch on indicator (
while the auto light switch is turned on.
displayed) or off ( not displayed).
) is on the display in all modes
Questions & Answers
Question: What causes incorrect direction readings?
Answer:
• Incorrect bidirectional calibration. Perform bidirectional calibration.
• Nearby source of strong magnetism, such as a household appliance, a
large steel bridge, a steel beam, overhead wires, etc., or an attempt to
perform direction measurement on a train, boat, etc. Move away from large
metal objects and try again. Note that digital compass operation cannot be
performed inside a train, boat, etc.
Question: What causes different direction readings to produce different
Answer: Magnetism generated by nearby high-tension wires are interfering
Question: Why am I having problems taking direction readings indoors ?
Answer: A TV, personal computer, speakers, or some other object is
Question: How does the altimeter work?
Answer: Generally, air pressure and temperature decrease as altitude
results at the same location ?
with detection of terrestrial magnetism. Move away from the hightension wires and try again.
interfering with terrestrial magnetism readings. Move away from
the object causing the interference or take the direction reading
outdoors. Indoor taking direction readings are particularly difficult
inside ferro-concrete structures. Remember that you will not be
able to take direction readings inside of trains, airplanes, etc.
increases. 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.
Altitude Air Pressure Temperature
616 hPa/mb
4000 m
3500 m
3000 m
2500 m
2000 m
1500 m
1000 m
500 m
0 m
14000 ft
12000 ft
10000 ft
8000 ft
6000 ft
4000 ft
2000 ft
0 ft
Source: International Civil Aviation Organization
• 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
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.
About 8 hPa/mb per 100 m
701 hPa/mb
About 9 hPa/mb per 100 m
795 hPa/mb
About 10 hPa/mb per 100 m
About 11 hPa/mb per 100 m
899 hPa/mb
About 12 hPa/mb per 100 m
19.03 inHg
About 0.15 inHg per 200 ft
22.23 inHg
About 0.17 inHg per 200 ft
About 0.192 inHg per 200 ft
25.84 inHg
About 0.21 inHg per 200 ft
Height of building 130 m
(Relative altitude)
–11°C
–4.5°C
About 6.5°C
per 1000 m
2°C
8.5°C
15°C1013 hPa/mb
16.2°F
30.5°F
About 3.6°F
per 1000 ft
44.7°F
59.0°F29.92 inHg
Rooftop at an altitude of
230 m above sea level
(Altitude above sea
level)
Sea
Precautions Concerning Simultaneous Measurement of Altitude and
Temperature
Though you can perform altitude and temperature measurements at the same
time, you should remember that each of these measurements require
different conditions for best results. With temperature measurement, it is best
to remove the watch from your wrist in order to eliminate the effects of body
heat. In the case of altitude measurement, on the other hand, it is better to
leave the watch on your wrist, because doing so keeps the watch at a
constant temperature, which contributes to more accurate altitude
measurements.
The following describes what you should do to give priority to either altitude or
temperature.
• To give altitude measurement priority, leave the watch on your wrist or in
any other location where the temperature of the watch is kept constant.
• To give temperature measurement priority, remove the watch from your
wrist and allow it to hand freely from your bag or in another location where
it is not exposed to direct sunlight. Note that removing the watch from your
wrist can momentarily affect pressure sensor readings.
Question: How does the barometer work?
Answer: Barometric pressure indicates changes in the atmosphere, and by
monitoring these changes you can predict the weather with
reasonable accuracy. Rising atmospheric pressure indicates good
weather, while falling pressure indicates deterioration weather
conditions.
The barometric pressures that you see in the newspaper and on
the TV weather report are measurements corrected to values
measured at 0 m sea level.
Battery
This watch is equipped with a solar cell and a
Solar cell panel
rechargeable battery (secondary battery) that is
charged by the electrical power produced by the
solar cell.
Important!
• Storing the watch for long periods in an area
where there is no light or wearing it in such a
way that it is blocked from exposure to light can
cause rechargeable battery power to run down.
Be sure that the watch is normally exposed to
bright light whenever possible.
5
USER’S GUIDE 2471
• This watch employs a solar cell that converts light into electricity that
charges a built-in rechargeable battery. Normally, the rechargeable battery
should not need replacement, but after very long use over a number of
years, the rechargeable battery may lose its ability to achieve a full charge.
Should you notice problems with getting the rechargeable battery to a full
charge, contact your dealer or CASIO distributor about having the
rechargeable battery replaced.
• The rechargeable battery should be replaced with a CASIO-specified
CTL1616 battery only. Other rechargeable batteries can cause damage to the
watch.
• Having the battery replaced will delete all data stored in watch memory.
• Turn on the watch’s Power Saving function and keep it in an area normally
exposed to bright light when storing it for long periods. This helps to keep
the rechargeable battery from going dead.
Battery Power Indicator
The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.
Battery Power
Level
Indicator
1
2
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Battery power
indicator
3
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(Charge Soon Alert)
4
• The flashing CHARGE indicator at Level 3 tells you that battery power is
very low, and that exposure to bright light for charging is required as soon
as possible.
• At Level 4, all functions are disabled. Functions are enabled once again after
the rechargeable battery is charged, but anything previously stored in memory
is lost. Because of this, you need to set the current time and date after the
battery is recharged to Level 2 from Level 4. Though the time appears on
the display after the battery is charged to Level 3, you will not be able to
change the time setting until the battery reaches Level 2.
• Leaving the watch in direct sunlight or some other very strong light source
can cause the battery power indicator to temporarily show a reading that is
actually higher than the battery level. The correct battery power indicator
should appear after a few minutes.
• If you use the backlight or the alarm a number of times during a short
period, RECOVER appears on the display and the following operations
become disabled until battery power recovers.
Backlight; Alarm and hourly time signal; Sensor operation
After some time, battery power will recover and RECOVER will disappear,
indicating that the above functions are enabled again.
• Even if battery power is at Level 1 or Level 2, the Digital Compass Mode,
Barometer/Thermometer Mode, or Altimeter Mode sensor may be disabled
if there is not enough voltage available to power it sufficiently. This condition
is indicated on the display as shown in the table below. Sensor operation
should resume when battery voltage returns to the normal levels.
Mode
Digital
Compass
Barometer/
Thermometer
Altitude
Charging Precautions
Certain charging conditions can cause the watch to become very hot. Avoid
leaving the watch in the areas described below whenever charging its
rechargeable battery.
Also note that allowing the watch to become very hot can cause its liquid
crystal display to black out. The appearance of the LCD should become
normal again when the watch returns to a lower temperature.
Warning!
Leaving the watch in bright light to charge its rechargeable battery can
cause it to become quite hot. Take care when handling the watch to
avoid burn injury. The watch can become particularly hot when exposed
to the following conditions for long periods.
• On the dashboard of a car parked in direct sunlight
• Too close to an incandescent lamp
• Under direct sunlight
Charging Guide
After a full charge, timekeeping remains enabled for up to about five months,
while the watch is used under the conditions described below.
Display Indication for
Low Voltage Upon
Entering the Mode
xxx
Last measured pressure
value
Blank
Function Status
All functions enabled.
All functions enabled.
Alarm, Hourly Time Signal,
backlight, display, sensors,
and buttons are disabled.
All functions, including
timekeeping, are disabled.
Display Indication for
Low Voltage During
Measurement
Last measured direction
Last measured pressure
value
Last measured altitude
Operating Conditions
•
Watch is not exposed to light
•
Display on 18 hours per day, sleep state 6 hours per day
•
1 backlight operation (2 seconds) per day
•
10 seconds of alarm operation per day
•
10 digital compass operations per week
•
1 climb using the pressure sensor per month (10 hours per climb, with the
Long Mode)
Charge Times
Exposing the watch to light for the periods shown below each day restores
the power used by the above operating conditions.
Exposure Level (Brightness)
Approximate
Exposure Time
Outdoor Sunlight (50,000 lux)
Sunlight Through a Window (10,000 lux)
Daylight Through a Window on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting (500 lux)
5 minutes
24 minutes
48 minutes
8 hours
• Stable operation is promoted by frequent charging.
Recovery Times
The table below shows the amount exposure that is required to take the
battery from one level to the next.
Exposure Level
(Brightness)
Outdoor Sunlight
(50,000 lux)
Sunlight Through a
Window (10,000 lux)
Daylight Through a
Window on a Cloudy
Day (5000 lux)
Indoor Fluorescent
Lighting (500 lux)
• The above exposure time values are all for reference only. Actual required
exposure times depend on lighting conditions.
Approximate Exposure Time
Level 4 Level 3 Level 2 Level 1
▲
▲
50 minutes 12 hours 2 hours
2 hours 60 hours 10 hours
4 hours - - - - - - - - - - - - - - - -
32 hours - - - - - - - - - - - - - - - -
Reference
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 Malfunction Indicator
Should the pressure sensor or direction sensor malfunction, the message
ERR appears on the display for about two seconds, and then sensor
operation is disabled.
Direction
Measurement
ERR
indicator
• After battery power drops to Level 4, the watch performs a memory check
when power is restored from Level 3 to Level 2. The message ERR appears
on the display if any memory abnormality is discovered. If this happens,
take the watch to an authorized CASIO distributor or maintenance service
provider.
• Even if battery power is at Level 1 or Level 2, the Digital Compass Mode,
Barometer/Thermometer Mode, or Altimeter Mode sensor may be disabled
if there is not enough voltage available to power it sufficiently. In this case,
the ERR message appears on the display when you switch to the
Timekeeping Mode. This does not indicate malfunction, and sensor
operation should resume once battery voltage returns to its normal level.
• Even if battery power is at Level 1 or Level 2, the ERR message will appear
on the Timekeeping Mode screen if there is not enough voltage available to
power the pressure sensor sufficiently during a barometric pressure
measurement or memory measurement (altitude) operation. This does not
indicate malfunction, and sensor operation should resume once battery
voltage returns to its normal level.
Whenever you have a sensor malfunction, be sure to take the watch to an
authorized CASIO distributor or service provider as soon as possible.
Barometric
Pressure
Measurements
Last
measurement
value
Altitude
Measurement
▲
6
USER’S GUIDE 2471
Auto Return Features
• The watch automatically returns to the Timekeeping Mode if you do not
perform any button operation for two or three minutes in the Digital
Compass Mode or Barometer/Thermometer Mode.
• If you do not perform any button operation while in the Altimeter Mode, the
watch automatically returns to the Timekeeping Mode after four or five
hours in the Short Mode, or after nine or 10 hours in the Long Mode.
• If you leave a screen with flashing digits on the display for two or three
minutes without performing any operation, the watch automatically saves
anything you have input up to that point and exits the setting screen.
Power Saving Function
When turned on, the Power Saving function automatically puts the watch into
a sleep state whenever it is left in an area where it is dark for a certain period.
The table below shows how watch functions are affected by the Power Saving
function.
Elapsed Time in
Dark
30 to 40 minutes
6 or 7 days
• Wearing watch inside the sleeve of clothing can cause it to enter the sleep
state.
Display
Blank, with
SLEEP flashing
Blank, with
SLEEP not
flashing
All functions enabled, except for
the display
Daily alarm, Hourly Time Signal,
sensor measurements disabled
Operation
To recover from the sleep state
Perform any one of the following operations.
• Move the watch to a well-lit area. It can take up to five seconds for the
display to turn on.
• Press any button.
• Angle the watch towards your face for reading.
To turn Power Saving on and off
1. In the Timekeeping Mode, hold down A until
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Data and Setting Scrolling
The E and B buttons are used in various modes and setting screens to
scroll through data on the display. In most cases, holding down these buttons
during a scroll operation scrolls through the data at high speed.
Timekeeping
• Resetting the seconds to
59 causes the minutes to be increased by 1. In the range of 00 to 29, the
seconds are reset to
• The year can be set in the range of 2000 to 2039.
• The watch’s built-in full automatic calendar automatically makes allowances
for different month lengths and leap years. Once you set the date, there
should be no reason to change it except when battery power drops to Level
4.
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.
• With the 12-hour format, the P (PM) indicator appears on the display for
times in the range of noon to 11:59 p.m. and no indicator appears 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,
without any indicator.
Backlight Precautions
• The electro-luminescent panel that provides illumination loses power after
very long use.
• The illumination provided by the backlight may be hard to see when viewed
under direct sunlight.
• The backlight automatically turns off whenever an alarm sounds.
• 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.
• Frequent use of the backlight runs down the battery.
the seconds start to flash, which indicates the
setting screen.
2. Press D eight times until the Power Saving
on/off screen appears.
3. Press E to toggle Power Saving on (
off (
OFF).
4. Press A to exit the setting screen.
0000
00 while the current count is in the range of 30 to
0000
0000
00 without changing the minutes.
0000
ON) and
Auto light switch precautions
• Wearing the watch on the inside of your wrist and movement or vibration of
your arm can cause the auto light switch to activate and illuminate the
display. To avoid running down the battery, turn off the auto light switch
whenever engaging in activities that might cause frequent illumination of
the display.
More than 15 degrees
too high
• Static electricity or magnetic force can interfere with proper operation of the
auto light switch. If the backlight does not light, try moving the watch back to
the starting position (parallel with the ground) and then tilt it back toward
you again. If this does not work, drop your arm all the way down so it hangs
at your side, and then bring it back up again.
• Under certain conditions, the backlight may not light until about one second
after you turn the face of the watch towards you. This does not necessarily
indicate malfunction of the backlight.
Digital Compass Precautions
This watch features a built-in magnetic bearing sensor that detects terrestrial
magnetism. This means that north indicated by this watch is magnetic north,
which is somewhat different from true polar north. The magnetic north pole is
located in northern Canada, while the magnetic south pole is in southern
Australia. Note that the difference between magnetic north and true north as
measured with all magnetic compasses tends to be greater as one gets
closer to either of the magnetic poles. You should also remember that some
maps indicate true north (instead of magnetic north), and so you should make
allowances when using such maps with this watch.
Location
• Taking a direction reading when you are near a source of strong magnetism
can cause large errors in readings. Because of this, you should avoid taking
direction readings while in the vicinity of the following types of objects:
permanent magnets (magnetic necklaces, etc.), concentrations of metal
(metal doors, lockers, etc.), high tension wires, aerial wires, household
appliances (TVs, personal computers, washing machines, freezers, etc.)
• Accurate direction readings are impossible while in a train, boat, air plane,
etc.
• Accurate readings are also impossible indoors, especially inside ferro-
concrete structures. This is because the metal framework of such structures
picks up magnetism from appliances, etc.
Storage
• The precision of the bearing sensor may deteriorate if the watch becomes
magnetized. Because of this, you should be sure to store the watch away
from magnets or any other sources of strong magnetism, including:
permanent magnets (magnetic necklaces, etc.) and household appliances
(TVs, personal computers, washing machines, freezers, etc.)
• Whenever you suspect that the watch may have become magnetized,
perform one of the calibration procedures under “Calibrating the Bearing
Sensor”.
Calibrating the Bearing Sensor
Whenever you suspect that direction readings produced by the watch are
wrong, you should calibrate it. You can use either one of two calibration
procedures:
Use bidirectional calibration when you want to take readings within an area
exposed to magnetic force. This type of calibration should be used if the
watch become magnetized for any reason.
With northerly calibration, you “teach” the watch which way is north (which
you have to determine with another compass or some other means). You
could use this calibration procedure, for example, to set the watch to indicate
true north instead of magnetic north.
Important!
• If you want to perform both bidirectional and northerly calibration, be sure
• The more correctly you perform bidirectional calibration, the better the
bidirectional calibration
to perform bidirectional calibration first, and then perform northerly
calibration. This is necessar y because bidirectional calibration cancels any
previously set northerly calibration setting.
accuracy of the bearing sensor readouts. You should perform bidirectional
calibration whenever you change environments where you use the bearing
sensor, and whenever you feel that the bearing sensor is producing
incorrect readings.
• The backlight may not light if the face of the
watch is more than 15 degrees above or below
parallel. Make sure that the back of your hand
is parallel to the ground.
• The backlight turns off in about two seconds,
even if you keep the watch pointed towards
your face.
or
northerly calibration
.
7
USER’S GUIDE 2471
Precautions about bidirectional calibration
• You can use any two opposing directions for bidirectional calibration. You
must, however, make sure that they are 180 degrees opposite each other.
Remember that if you perform the procedure incorrectly, you will get wrong
bearing sensor readings.
• Do not move the watch during the one or two seconds (from the point you
press B up to the point that OK appears in the upper display area) that the
calibration of each direction is in progress.
• You should perform bidirectional calibration in an environment that is the
same as that where you plan to be taking direction readings. If you plan to
take direction readings in an open field, for example, calibrate in an open
field.
To perform bidirectional calibration
1. Press B to enter the Digital Compass Mode.
2. Hold down A for about one second until the
upper display area changes to show ---1---,
which indicates the setting screen.
• At this time, the magnetic north pointer
flashes at the 12 o’clock position to indicate
that the watch is ready to calibrate the first
direction.
3. Place the watch on a level surface facing any direction you want, and
press B to calibrate the first direction.
• When the calibration procedure is complete, the message OK appears
in the upper display area. This soon changes to ---2--- and the magnetic
north pointer flashes at the 6 o’clock position to indicate that the watch
is ready for the second direction.
4. Rotate the watch 180 degrees.
5. Press B again to calibrate the second direction.
• The message OK
Digital Compass Mode screen.
appears and the watch automatically returns to the
To perform northerly calibration
1. While in the Digital Compass Mode, hold
down A for about one second until the upper
display area changes to show ---1---, which
indicates the setting screen.
2. Press D to start the northerly calibration
procedure.
• At this time, the indicator (direction N)
appears in the upper display area.
3. Place the watch on a level surface, and position it so that its 12 o’clock
position points north (as measured with another compass).
4. Press B to start the calibration operation.
• The message OK appears and the watch automatically returns to the
Digital Compass Mode screen.
Changing the Barometric Pressure and Temperature Units
Changing the barometric pressure units automatically restarts the barometric
pressure graph.
To change the Barometric Pressure and Temperature Units
1. Press C to enter the Barometer/
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Temperature
Sensor
Calibration
Thermometer Mode.
2. Hold down A until either
temperature value (if set) starts to flash, which
indicates the setting screen.
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3. Press D to move the flashing in the
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sequence shown below.
Pressure
Sensor
Calibration
°C / °F
OFF or a
hPa[mb]/inHg
To calibrate the temperature sensor
1. Press C to enter the Barometer/
Thermometer Mode.
2. Hold down A until either
temperature value (if set) starts to flash, which
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Calibrating the Barometric Pressure Sensor
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.
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.
indicates the setting screen.
3. Press E (+) or B (–) to change the displayed
temperature by 0.1°C (or 0.2°F).
• Pressing B and E at the same time
returns to the factory calibration (
4. Press A to return to the Barometer/
Thermometer Mode screen.
OFF or a
OFF).
To calibrate the pressure sensor
1. Press C to enter the Barometer/
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Thermometer Mode.
2. Hold down A until either
temperature value (if set) starts to flash, which
indicates the setting screen.
3. Press D to move the flashing to the pressure
sensor calibration setting.
• At this time,
pressure value should be flashing on the
display.
4. Press E (+) or B (–) to change the displayed
barometric pressure by 1 hPa/mb (0.05 inHg).
• Pressing B and E at the same time
returns to the factory calibration (
5. Press A to return to the Barometer/
Thermometer Mode screen.
OFF or the barometric
OFF or a
OFF).
To change the Altitude Units
1. Press E to enter the Altimeter Mode.
2. Hold down A until the display clears. After
four or five seconds, either
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reference altitude (if set) starts to flash, which
indicates the setting screen.
3. Press D three times to move the flashing to
the altitude unit setting.
4. Use E to select the unit you want (m or ft).
5. Press A to return to the Altimeter Mode
screen.
• Changing the altitude units automatically turns
the altitude alarm off.
• Changing the altitude units automatically
restarts the altitude graph.
• Performing the above procedure causes
altitude values stored in memory also to be
converted to the unit you select.
OFF or the current
4. Press D to move the flashing to the unit setting you want to change
(
°C/°F or hPa[mb]/inHg).
5. Use E to select the unit you want.
6. Press A to return to the Barometer/Thermometer Mode screen.
Calibrating the Temperature Sensor
The temperature 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 temperature readings produced by the watch, you can
calibrate the sensor to correct the errors.
Important!
Incorrectly calibrating the temperature sensor can result in incorrect readings.
Carefully read the following before doing anything.
• Compare the readings produced by the watch with those of another reliable
and accurate thermometer.
• If adjustment is required, remove the watch from your wrist and wait for 20
or 30 minutes to give the temperature of the watch time to stabilize.
8
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