E-7
Looking up Sunrise and Sunset Times ………………………………………………………………… E-78
To enter the Sunrise/Sunset Mode ………………………………………………………………… E-78
To view the sunrise/sunset time for a particular date …………………………………………… E-79
To look up the sunrise and sunset times for a specifi c location ………………………………… E-80
Using the Stopwatch ……………………………………………………………………………………… E-82
To enter the Stopwatch Mode ……………………………………………………………………… E-82
To perform an elapsed time operation …………………………………………………………… E-82
To pause at a split time ……………………………………………………………………………… E-82
To measure two fi nishes …………………………………………………………………………… E-83
Using the Countdown Timer ……………………………………………………………………………… E-84
To enter the Countdown Timer Mode ……………………………………………………………… E-84
To specify the countdown start time ……………………………………………………………… E-84
To perform a countdown timer operation ………………………………………………………… E-85
To stop the alarm …………………………………………………………………………………… E-85
Using the Alarm …………………………………………………………………………………………… E-86
To enter the Alarm Mode …………………………………………………………………………… E-86
To set an alarm time ………………………………………………………………………………… E-87
To turn an alarm and the Hourly Time Signal on and off………………………………………… E-88
To stop the alarm …………………………………………………………………………………… E-89
E-6
Specifying Temperature, Barometric Pressure, and Altitude Display Units …………………… E-44
To specify temperature, barometric pressure, and altitude display units ……………………… E-44
Taking Barometric Pressure and Temperature Readings ………………………………………… E-46
To take barometric pressure and temperature readings ………………………………………… E-46
To enable or disable the barometric pressure change alert …………………………………… E-51
To calibrate the pressure sensor and the temperature sensor ………………………………… E-53
Using the Altimeter Mode ………………………………………………………………………………… E-55
To select the altitude screen format ……………………………………………………………… E-57
To select the altitude auto reading interval ……………………………………………………… E-58
To take altitude readings …………………………………………………………………………… E-60
To specify a reference altitude value ……………………………………………………………… E-61
To specify the altitude differential start point ……………………………………………………… E-62
To use the altitude differential value ……………………………………………………………… E-63
To save a reading manually ………………………………………………………………………… E-64
To start trek log value updating …………………………………………………………………… E-67
To stop trek log value updating …………………………………………………………………… E-67
Viewing Altitude Records ………………………………………………………………………………… E-72
To view altitude records …………………………………………………………………………… E-72
To delete all manually saved data ………………………………………………………………… E-76
To delete data in a specifi c memory area ………………………………………………………… E-76
E-5
Contents
About This Manual …………………………………………………………………………………………… E-2
Things to check before using the watch ………………………………………………………………… E-3
Charging the Watch …………………………………………………………………………………………… E-9
To recover from the sleep state …………………………………………………………………… E-13
Radio Controlled Atomic Timekeeping ………………………………………………………………… E-14
To get ready for a receive operation ……………………………………………………………… E-16
To perform manual receive ………………………………………………………………………… E-18
To check the latest signal reception results ……………………………………………………… E-21
To turn auto receive on or off ……………………………………………………………………… E-21
Mode Reference Guide …………………………………………………………………………………… E-23
Timekeeping ………………………………………………………………………………………………… E-27
Confi guring Home City Settings ………………………………………………………………………… E-28
To confi gure Home City and summer time settings ……………………………………………… E-28
Confi guring Current Time and Date Settings Manually ……………………………………………… E-30
To change the current time and date settings manually ………………………………………… E-30
Taking Direction Readings ……………………………………………………………………………… E-33
To take a direction reading ………………………………………………………………………… E-33
To perform bidirectional calibration ………………………………………………………………… E-37
To perform magnetic declination correction ……………………………………………………… E-38
To store a direction angle reading in Bearing Memory ………………………………………… E-39
E-4
2. Check the Home City and the daylight saving time (DST) setting.
Use the procedure under “To confi gure Home City and summer time settings” (page E-28) to confi gure
your Home City and daylight saving time settings.
Important!
• Proper time calibration signal reception, and World Time Mode and Sunrise/Sunset Mode data depend
on correct Home City, time, and date settings in the Timekeeping Mode. Make sure you confi gure
these settings correctly.
3. Set the current time.
•
To set the time using a time calibration signal
See “To get ready for a receive operation” (page E-16).
• To set the time manually
See “Confi
guring Current Time and Date Settings Manually” (page E-30).
The watch is now ready for use.
• For details about the watch’s radio controlled timekeeping feature, see “Radio Controlled Atomic
Timekeeping” (page E-14).
E-3
Things to check before using the watch
1. Check the battery power level.
Is “H” or “M” displayed for the battery power indicator (page E-10)?
Go to step 2.
Power is low. Charge the watch by placing it in a location
where it is exposed to light. For details, see “Charging the
Watch” (page E-9).
NO YES
YES
Does any one of the following conditions exist?
• Battery power indicator shows “L” and “LOW” is flashing on the
display.
• “CHG” is flashing on the display.
• The face is blank.
The watch is charged
sufficiently.
For details about
charging, see
“Charging the Watch”
(page E-9).
NEXT
Battery power
indicator
E-2
About This Manual
• Depending on the model of your watch, digital display text appears
either as dark fi gures on a light background, or light fi gures on a dark
background. All examples in this manual are shown using dark fi gures
on a light background.
• Button operations are indicated using the letters shown in the
illustration.
• Note that the product illustrations in this manual are intended for
reference only, and so the actual product may appear somewhat
different than depicted by an illustration.
E-1
ENGLISH
Important!
• The watch’s Altimeter Mode calculates and displays relative altitude based on barometric pressure
readings produced by its pressure sensor. This means that readings taken at different times at the
same location may produce different altitude values due to changes in barometric pressure. Also note
that the value displayed by the watch may be different from the actual elevation and/or sea level
elevation indicated for the area where you are located.
• When using the altimeter of this watch for mountain climbing or other activities, it is highly
recommended that you check a map, local altitude indications, or some other source for your current
correct altitude and regularly calibrate the altimeter with the latest information. For more information,
see “To specify a reference altitude value” (page E-61).
• Whenever you use the digital compass of this watch for serious trekking, mountain climbing, or other
activities, be sure always to take along another compass to confi
rm readings. If the readings produced
by the digital compass of this watch are different from those of the other compass, perform bidirectional
calibration of the digital compass to ensure more accurate readings.
•
Direction readings and digital compass 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.)
Congratulations upon your selection of this CASIO watch.
To ensure that this watch provides you with the years of service for which it is designed, carefully read
and follow the instructions in this manual, especially the information under “Operating Precautions” and
“User Maintenance”.
Keep all user documentation handy for future reference.
Applications
The built-in sensors of this watch measure direction, barometric pressure, temperature and altitude.
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.
Warning !
• 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 use a second compass to confi rm direction readings.
• 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 this product or its malfunction.
E
MO2005-EA
© 2020 CASIO COMPUTER CO., LTD.
Operation Guide 3490
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