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Casio 3155 Operation Manual

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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 accordingly.
• 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
• 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 settings.
• 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.
To specify your Home City
City code
Hour : Minutes
PM indicator
YVR, LAX : Vancouver, Los Angeles
YEA, DEN: Edmonton, Denver
MEX, CHI : Mexico City, Chicago
MIA, YTO, NYC : Miami, Toronto, New York
: Halifax
: St.Johns
3. Press A to exit the setting screen.
• Normally, your watch should show the correct time as soon as you select your Home
City code. If it does not, it should adjust automatically after the next auto receive
operation (in the middle of the night). You also can perform manual receive or you
can set the time manually.
• The watch will receive the time calibration signal automatically from the applicable
transmitter (in the middle of the night) and update its settings accordingly. For
information about the relationship between city codes and transmitters, see "Time
Calibration Signal Reception" and "Transmitters".
Operation Guide 3155
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
• When you are not wearing the watch on your wrist,
position the face so it is pointed at a source of bright
• 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 covered.
Battery discharges in the dark.
Timekeeping Mode
Press C.
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
• 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 window
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 background.
• 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
• See the maps under "Approximate Reception Ranges" for information about the
reception ranges of the watch.
• You can disable time signal reception, if you want. See "To turn auto receive on and
off" for more information.
• Under factory default settings, auto receive is turned off for all of the following city
codes: MOW (Moscow), HNL (Honolulu), and ANC (Anchorage). For details about
turning on auto receive for these city codes, see "To turn auto receive on and off".
Time Calibration Signal Reception
There are two different methods you can use to receive the time calibration signal:
auto receive and manual receive.
• Auto Receive
With auto receive, the watch receives the time calibration signal automatically up to 6
times a day (5 times a day for the Chinese calibration signal). When any auto receive
is successful, the remaining auto receive operations are not performed. For more
information, see "About Auto Receive".
• Manual Receive
Manual receive lets you start a time calibration receive operation with the press of a
button. For more information, see "To perform manual receive".
• When getting ready to receive the time calibration signal, position the watch as
shown in the nearby illustration, with its 12 o'clock side facing towards a window.
This watch is designed to receive a time calibration signal late at night. Because of
this, you should place the watch near a window as shown in the illustration when you
take it off at night. Make sure there are no metal objects nearby.
• Make sure the watch is facing the right way.
• Proper signal reception can be difficult or even impossible under the conditions listed
Inside or
Inside a
Recall Mode
World Time Mode
Stopwatch Mode
Alarm Mode
12 o'clock
Near household
Near a
Near high-
appliances, office
site, airport, or
power lines
or a mobile
other sources of
electrical noise
Among or



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  Summary of Contents for Casio 3155

  • Page 1 Operation Guide 3155 Getting Acquainted Congratulations upon your selection of this CASIO watch. To get the most out of your • The actual level at which some functions are disabled depends on the watch model. purchase, be sure to read this manual carefully.
  • Page 2 Operation Guide 3155 • Signal reception normally is better at night than during the day. Auto Receive Start Times • Time calibration signal reception takes from two to seven minutes, but in some Your Home City cases it can take as long as 14 minutes. Take care that you do not perform any...
  • Page 3 Operation Guide 3155 To turn auto receive on and off Signal Reception Troubleshooting 1. In the Timekeeping Mode, press D to display the last Check the following points whenever you experience problems with signal reception. successful receive time and date screen.
  • Page 4: Recall Mode

    Operation Guide 3155 Recall Mode World Time You can use the Recall Mode to view the following data in watch memory. World Time shows the current time in 48 cities (29 time City code • Times measured in the Rally Mode zones) around the world.
  • Page 5: Countdown Timer

    Operation Guide 3155 3. When the setting you want to change is flashing, use D and B to change it as Alarm Operation described below. The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the watch is in.
  • Page 6 2 hours 26 hours 7 hours problems getting the special rechargeable battery to charge fully, contact your dealer (50,000 lux) or CASIO distributor about having it replaced. Sunlight Through a Window 6 hours 129 hours 36 hours • Never try to remove or replace the watch’s special battery yourself. Use of the wrong (10,000 lux) type of battery can damage the watch.
  • Page 7 Operation Guide 3155 To turn Power Saving on and off Daylight Saving Time (DST) 1. In the Timekeeping Mode, hold down A until the city Daylight Saving Time (summer time) advances the time setting by one hour from code starts to flash, which indicates the setting screen.
  • Page 8: Utc Differential/City Code List

    Operation Guide 3155 • Static electricity or magnetic force can interfere with proper operation of the auto light switch. If illumination does not turn on, 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.

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