Casio GS-1100 Watch User Manual - Module 4777

Important Information

Please read this important information before use.

Battery

If you notice signs of insufficient power (dim display or no backlight), replace the battery at an authorized CASIO dealer. The battery included in your watch is for test purposes and may have a shorter lifespan than a standard battery.

Water Protection

Watches are classified by water resistance levels (from I to V). Refer to the table below to determine usage rules for your watch.

Notes for respective sections:

• I: The watch is not water-resistant. Avoid any moisture.
• III: If the watch is exposed to salt water, rinse it thoroughly and dry it.
• IV: If the watch is exposed to salt water, rinse it thoroughly and dry it.
• V: The watch can be used for scuba diving (except for depths requiring helium-oxygen mixtures).

WARNING!!! For all categories of watches, do not:

• Press buttons underwater.
• Set hands underwater.
• Unscrew the crown underwater.

Watch Care

General Care:

• Replace the rubber gasket that protects the watch from water and dust every 2-3 years.
• If water enters the watch, have it checked immediately by an authorized CASIO dealer.
• Do not expose the watch to extremely high or low temperatures.
• While the watch is designed for normal use, avoid rough handling and dropping it.
• Do not fasten the strap too tightly. A finger should fit between your wrist and the strap.
• To clean the watch and strap, use a dry soft cloth or a soft cloth dampened with a mild neutral detergent solution. Never use volatile substances like gasoline, solvents, spray cleaners, etc.
• When not using your watch, store it in a dry place.
• Avoid contact with gasoline, cleaning solvents, spray aerosols, adhesives, paint, etc. Chemical reactions caused by these materials can damage gaskets, the case, and the watch's finish.
• Some models have silk-screened patterns on their straps. Clean these straps carefully to avoid damaging the designs.

For watches with resin straps:

• You may notice a white powdery substance on the strap. This substance is harmless to your skin or clothing and can be easily removed by wiping with a soft cloth.
• Sweat or moisture, and storage in high humidity conditions can lead to strap damage, tearing, or cracking. To ensure a long service life for the resin strap, wipe it clean of dirt and moisture with a soft cloth as often as possible.

For watches with fluorescent cases and straps:

• Prolonged exposure to direct sunlight can cause the fluorescent color to gradually fade.
• Prolonged contact with moisture can cause the fluorescent color to gradually fade. If any moisture gets onto the watch surface, wipe it off as soon as possible.
• Prolonged contact with a moist surface can lead to fading of the fluorescent color. Ensure there is no moisture on the fluorescent surface and avoid contact with other surfaces.
• Heavy friction on a surface with fluorescent paint can transfer the fluorescent paint to that surface.

CASIO COMPUTER CO., LTD. is not responsible for any damage that may occur from the use of this watch and does not accept claims from third parties.

General Description of Operating Modes

The illustration shows a general view of the watch in the Timekeeping Mode.

Pressing the "C" button sequentially cycles through the modes: Timekeeping Mode → World Time Mode → Alarm Mode → Timekeeping Mode.

Pressing button "D" or "B" in Timekeeping Mode allows you to switch to Stopwatch Mode. To return to Timekeeping Mode, press button "D" (provided the stopwatch time has been reset to zero).

Pressing button "A" in Timekeeping Mode allows you to view the Last Signal Reception Data display.

Pressing and holding button "A" for 2 seconds allows you to enter the manual calibration mode.

Pressing and holding button "A" for 5 seconds allows you to enter the broadcast time zone setting mode, as well as adjust the time/date.

Calibration

This watch automatically corrects its time based on the calibration signal. However, you can also set the time manually.

Setting your current location's city:

1. In Timekeeping Mode, press and hold button "A" until you hear two beeps.
2. The second hand will move to the code of your current location city and stop there.
3. Use button "D" to select your current location city. The watch hands will move to the time of the selected city, and the date on the display will also change accordingly.
4. Do not press any buttons while the hands are moving.

Calibration Signal:

This watch receives a calibration signal and updates its time accordingly.

• In Europe, signal transmitters are located in Mainflingen, Germany, and Anthorn, England. The signal range is approximately 500 km. The signal may be weak at distances over 1,500 km.
• In the United States, the signal transmitter is located in Fort Collins. The signal range is approximately 1,000 km. The signal may be weak at distances over 3,000 km.
• In Japan, signal transmitters are located in Fukushima and Fukuoka/Saga. The signal range is approximately 500 km. The signal may be weak at distances over 1,000 km.
• The broadcast signal is also affected by natural conditions, atmospheric pressure, and temperature. Signal weakening can also be caused by:
  • The watch being near a TV, computer, or household appliance.
  • Being in a subway or tunnel.
  • Being in an airport, train station, or high-speed roadway.
  • Proximity to radio or signal transmission stations.
  • Electrostatic voltage.

There are two types of calibration signal reception. With auto-calibration enabled, the watch automatically receives the signal six times each day and corrects the time. With manual calibration enabled, you press a button to receive the signal:

1. Place your watch horizontally.
2. In Timekeeping Mode, press and hold button "A" for two seconds until you hear a beep.

Manual Calibration (Continued)

The stopwatch second hand will first move to the R (READY) position, indicating the watch is preparing to receive the signal, and then to the W (WORK) position, indicating signal reception is in progress.

If the calibration signal is unstable, the stopwatch second hand will move between the R and W positions.

Signal reception lasts up to 14 minutes. Be careful not to move your watch during reception.

Upon completion of signal reception, the stopwatch second hand will move to the Y (YES) position.

To stop the signal reception process and return to Timekeeping Mode, press any button.

If signal reception was unsuccessful, the second hand will move to the N (NO) position. The watch will then automatically return to Timekeeping Mode. You can also return to Timekeeping Mode at any time by pressing any button.

Auto-Calibration

When near any of the signal centers, the watch automatically receives the signal six times (during the night or early morning).

Auto-calibration only occurs when the watch is in Timekeeping or World Time modes.

Signal reception lasts up to 14 minutes. Be careful not to move your watch during reception.

Viewing Last Signal Reception Data

In Timekeeping Mode, press button "A" to view the last signal reception data.

• If reception was successful since midnight, the second hand will move to Y (YES); if unsuccessful, to N (NO).
• After 5 seconds, the watch will automatically return to Timekeeping Mode.
• If you manually adjusted the time and date, the second hand will move to N (NO).

Stopwatch Mode

The Stopwatch Mode allows you to measure split times for individual segments. The maximum measurable time is 59 minutes, 59.99 seconds.

Upon entering Stopwatch Mode, the 1/20 second hand and the minute hand will move to the 0 position.

Measuring Split Times in Stopwatch Mode

1. In Stopwatch Mode, press button "B" to start the stopwatch.
2. Press button "B" again to stop the stopwatch.
3. The 1/20 second hand shows time only for the first 60 seconds of measurement. Each time you stop the stopwatch by pressing button "B", the 1/20 second hand will show the corresponding recorded value.
4. You can resume stopwatch operation by pressing button "B" again.
5. When you are finished with the stopwatch, press button "D" to reset all values to zero.
6. To return to Timekeeping Mode, press button "D".

World Time Mode

This mode allows you to view the local time in any of 27 cities (29 time zones) worldwide.

World Time values are automatically set according to the current time.

Upon entering World Time Mode, the hour and minute hands will move to the time of the city you previously selected.

Viewing Time in Another Time Zone

In World Time Mode, press button "D" to select the city whose time you wish to view.

• The stopwatch second hand will show the time for the selected city.
• When you select a city that matches your current location, a beep will sound.
• The day-of-week hand in World Time Mode indicates whether Daylight Saving Time (DST) is enabled or disabled.
• After pressing button "D", the watch hands will automatically move to the time of the selected city.

Enabling/Disabling Daylight Saving Time (DST)

1. In World Time Mode, select the city code for which you want to enable or disable DST using button "D".
2. Press and hold button "A" to enable or disable DST.

Switching Time to Your Current Location's Time

1. In World Time Mode, press button "D" to select the city code of another time zone.
2. Press and hold button "B" for 2 seconds until you hear a beep.

The city selected as the other time zone city will become your current location city (the current time values will change accordingly), and conversely, your current location city will become the other time zone city.

City Code Table

Alarm Mode

You can set a daily alarm that will sound for 10 seconds when the set time is reached.

You can stop the alarm by pressing any button.

Upon entering Alarm Mode, the stopwatch second hand will indicate "ON" (enabled) or "OFF" (disabled) for the alarm.

Setting the Alarm

1. In Alarm Mode, press and hold button "A" for 2 seconds until you hear two beeps.
2. Use buttons "D" and "B" to set the alarm time.
3. Press button "A" to confirm.

Alarm On/Off

In Alarm Mode, press button "A" to turn the alarm ON or OFF.

Analog Time Mode

The analog time is automatically synchronized with the digital time. However, if synchronization does not occur, perform the following steps:

1. In Timekeeping Mode, press and hold button "A", then press and hold button "C" for 2 seconds until you hear a beep, indicating the start of adjustment.
2. The stopwatch second hand should move to the 0 position. If it does not, press button "D" to move the hand to the 0 position.
3. The stopwatch second hand should move to the 12 o'clock position. If it does not, press button "B" to move the hand to the 12 o'clock position.
4. After adjusting the positions of the stopwatch second hand and the second hand, press button "C". The watch will then automatically proceed to adjust the hour and minute hands.
5. The minute and hour hands should move to the 12 o'clock position, and the 24-hour hand to the 24 position. If this does not happen, use buttons "D" and "B" to move the hands to the correct positions.
6. After adjusting the hour and minute hands, press button "C". The watch will then automatically proceed to adjust the day-of-week hand.
7. The day-of-week hand should move to the 60 position. If it does not, use buttons "D" and "B" to move the hand to the correct position.
8. After adjusting the day-of-week hand, press button "C". The watch will then automatically proceed to adjust the date.
9. The date should move to the 1 position. If it does not, use buttons "D" and "B" to adjust the date. The date can be set from January 1, 2000, to December 31, 2099.
10. Press button "A" to confirm.

Timekeeping Mode (for setting time, date, DST)

1. In Timekeeping Mode, press and hold button "A" for 5 seconds until you hear a beep.
2. The stopwatch second hand will move to the code of your current location city and stop there.
3. The watch second hand will move to the 0 or 60 position.
4. Press button "D" to proceed to your current location city settings.
5. The watch hands will move to display the current time and date.
6. Use button "B" to set Daylight Saving Time: "AT/AUTO" (automatic DST on/off) – "OFF" (DST off) – "ON" (DST on). Auto-switching is not available for all cities.
7. Press button "C" to proceed to current time settings. A beep will sound, and the stopwatch second hand will move to the 12 o'clock position.
8. Use buttons "D" and "B" to change the hour and minute values.
9. After setting the current time, press button "C", which proceeds to current date settings.
10. Use buttons "D" and "B" to change the date. The date can be set from January 1, 2000, to December 31, 2099.
11. After setting the current date, press button "C", which proceeds to day-of-week settings.
12. Use button "D" to set the day of the week.
13. Pressing button "C" will return you to the city code settings.
14. When settings are complete, press button "A".
15. You can also use button "A" to return to Timekeeping Mode at any stage of the settings.

Power Source

This watch is equipped with a solar cell and a battery powered by the solar cell. If your watch is kept away from light for extended periods, the rechargeable battery's charge will deplete.

Power Indicator

The indicator shows the power level of the rechargeable battery.

If the battery is completely discharged, place your watch in a light source.

Be careful not to expose your watch to direct sunlight for extended periods, as this may cause malfunctions.

Battery Charging

By exposing your watch to sunlight every day, you ensure continuous battery charging:

After a full charge, normal operation of the watch continues for approximately 5 months under the following conditions:

• Watch is not exposed to sunlight.
• Alarm is used for 10 seconds per day.
• 1 calibration is performed per day.
• 18 hours of operation, 6 hours (per day) in sleep mode.

Power Saving Mode

Sleep mode allows the watch to conserve battery power when kept in darkness.

Your watch automatically enters sleep mode when kept in darkness. To return the watch to normal operation, place it in a well-lit area or press any button.

The following table shows the availability of watch functions when in sleep mode:

Technical Specifications

Accuracy: +-15 seconds per month (at normal temperature)

Timekeeping Mode: Displays hour, minute, year, month, date, day of week.

Additional Information

Calendar System: Automatic calendar from 2000 to 2099. DST (Daylight Saving Time) mode.

Analog Time Mode: Hand position correction.

Calibration Signal: Signal calibration (6 times daily), manual calibration, auto-calibration (5 signal centers).

World Time Mode: Current time in 27 cities (29 time zones).

Alarm Mode: Daily alarm.

Stopwatch Mode: Maximum measurement range 59 min 59.99 sec, split time measurements.

Product Information

Name: Wrist electronic / electro-mechanical quartz watches (men/women).

Brand: CASIO

Manufacturer: CASIO COMPUTER Co.,Ltd. (CASIO Computer Co., Ltd.)

Manufacturer Address: 6-2, Hon-machi 1-chome, Shibuya-ku, Tokyo 151-8543, Japan

Importer: OOO "Casio", 127055, Moscow, ul. Sushchevskaya, d.27, str. 1, Russia

Country of Origin: Japan

Warranty Period: 1 year

Authorized Organization for Claims: As indicated on the warranty card.

Compliance: Product complies with GOST 26270-98 (cl. 4.35). Certificate of Conformity No. POCC JP. АЯ46.Д42228 / POCC JP. АЯ46.Д42071 / POCC JP. АЯ46.Д42230.