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Casio 3150 Operation Manual

Casio watch operation guide
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Getting Acquainted

Congratulations upon your selection of this CASIO watch. To get the most out
of your purchase, be sure to read this manual carefully.
Keep the watch exposed to bright light
Bright Light
Solar cell
• The watch continues to operate, even when it is not exposed to light.
Leaving the watch in the dark can cause the battery to run down, which will
result in some watch functions to be disabled. If the battery goes dead, you
will have to re-configure watch settings after recharging. To ensure normal
watch operation, be sure to keep it exposed to light as much as possible.
Battery charges in the light.
Bright Light
Solar cell
(Converts light to
electrical power.)
Rechargeable battery

General Guide

• Press C to change from mode to mode.
• In any mode (except when a setting screen is on the display), press L to
illuminate the display.
Radio-controlled Atomic Timekeeping
This watch receives a time calibration signal and updates its time setting
• This watch is designed to pick up the time calibration signals transmitted in
Germany (Mainflingen), England (Anthorn), the United States (Fort Collins),
China (Shangqiu), and Japan (Fukushima, Fukuoka/Saga).
Current Time Setting
This watch adjusts its time setting automatically in accordance with a time
calibration signal. You also can perform a manual procedure to set the time
and date, when necessary.
• The first thing you should do after purchasing this watch is to specify
your Home City (the city where you normally will use the watch). For
more information, see "To specify your Home City" below.
• When using the watch outside the areas covered by the time signal
transmitters, you will have to adjust the current time setting manually as
required. See "Timekeeping" for more information about manual time
• The U.S. time calibration signal can be picked up by the watch while in
North America. The term "North America" in this manual refers to the area
that consists of Canada, the continental United States, and Mexico.
Operation Guide 3150
The electricity generated by the solar cell of the
watch is stored by a built-in battery. Leaving or
using the watch where it is not exposed to light
causes the battery to run down. Make sure the
watch is exposed to light as much as possible.
• When you are not wearing the watch on your
wrist, position the face so it is pointed at a
source of bright light.
• You should try to keep the watch outside of
your sleeve as much as possible. Charging is
reduced significantly if the face is only partially
Battery discharges in the dark.
Timekeeping Mode
Press C.
• The actual level at which some functions are disabled depends on the
watch model.
• Frequent display illumination can run down the battery quickly and require
charging. The following guidelines give an idea of the charging time
required to recover from a single illumination operation.
Approximately 5 minutes exposure to bright sunlight coming in through a
Approximately about 8 hours exposure to indoor fluorescent lighting
• Be sure to read "Power Supply" for important information you need to
know when exposing the watch to bright light.
If the display of the watch is blank...
If the display of the watch is blank, it means that the watch's Power Saving
function has turned off the display to conserve power.
• See "Power Saving Function" for more information.
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.
About This Manual
• Depending on the model of your watch, display text appears either as dark
figures on a light background or light figures on a dark background. All
sample displays in this manual are shown using dark figures on a light
• 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.
Some or all
Rally Mode
Countdown Timer
To specify your Home City
PM indicator
City code
Hour : Minutes
YVR, LAX : Vancouver, Los Angeles
YEA, DEN : Edmonton, Denver
MEX, CHI : Mexico City, Chicago
MIA, YTO, NYC : Miami, Toronto, New York
: Halifax
: St.Johns
Recall Mode
Stopwatch Mode
1. In the Timekeeping Mode, hold down A until
the city code starts to flash, which indicates
the setting screen.
2. Press D (east) and B (west) to select the
city code you want to use as your Home City.
LIS,LON : Lisbon,London
MAD, PAR, ROM, BER, STO : Madrid, Paris,
Rome, Berlin, Stockholm
: Athens
: Moscow
HKG, BJS, TPE : Hong Kong, Beijing, Taipei
SEL, TYO : Seoul, Tokyo
: Honolulu
: Anchorage
World Time Mode
Alarm Mode



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  Summary of Contents for Casio 3150

  • Page 1: Radio Controlled Atomic Timekeeping

    MO0805-EA Getting Acquainted Congratulations upon your selection of this CASIO watch. To get the most out of your purchase, be sure to read this manual carefully. Keep the watch exposed to bright light The electricity generated by the solar cell of the Bright Light watch is stored by a built-in battery.
  • Page 2 14 minutes. Take care that you do not perform any button operations or move the watch during this time. • The time calibration signal the watch will attempt to pick up depends on its current Home City code setting as shown below.
  • Page 3: To Perform Manual Receive

    (provided that the Timekeeping Mode time is set correctly). Before going to bed for the night, remove the watch from your wrist, and put it in a location where it can receive the signal easily.
  • Page 4 • This will save the paused time in memory and display the ongoing special stage timing operation. • The watch has enough memory to store up to 30 time records. If there are already 30 records in memory, storing a new measurement time causes the oldest record to be deleted automatically to make room for the new one.
  • Page 5: Recall Mode

    Operation Guide 3150 Recall Mode You can use the Recall Mode to view the following data in watch memory. • Times measured in the Rally Mode • Total of the measured times currently in memory (TTL) • You can use the D (forward) and B (back) buttons to scroll through records as shown below.
  • Page 6: Alarm Types

    The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the watch is in. In the case of the snooze alarm, the alarm operation is performed a total of seven times, every five minutes, until you turn the alarm off.
  • Page 7: About The Auto Light Switch

    • • • • • When you are wearing the watch, make sure that its auto light switch is turned off before riding a bicycle or operating a motorcycle or any other motor vehicle.
  • Page 8: Daylight Saving Time (Dst)

    Home City (the city where you normally use the watch). If your location is not included in the preset city codes, select the preset city code that is in the same time zone as your location.
  • Page 9 • Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state. • The watch will not enter the sleep state between 6:00 AM and 9:59 PM. If the watch is already in the sleep state when 6:00 AM arrives, however, it will remain in the sleep state.
  • Page 10: Utc Differential/City Code List

    • Avoid wearing the watch on the inside of your wrist. Doing so causes the auto light switch to operate when it is not needed, which shortens battery life. If you want to wear the watch on the inside of your wrist, turn off the auto light switch feature.

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