CASIO

Important Information (ПРЕЖДЕ ВСЕГО ПРОЧТИТЕ ЭТУ ВАЖНУЮ ИНФОРМАЦИЮ)

Battery (Батарея): The factory-installed battery may be discharged during shipping and storage. If the display becomes dim, replace the battery at an authorized CASIO service center or distributor.

Water Resistance (Защита от воды):

• For all watch categories, do not: press buttons underwater, set hands underwater, or unscrew the crown underwater.
• If exposed to saltwater, rinse thoroughly with fresh water and dry.
• Do not wear a watch with a leather strap while swimming. Avoid prolonged contact of leather straps with water.

Watches are classified by water resistance level (I to V). Consult the table below to determine correct usage:

Notes on Water Resistance:

• Level II (WR) means water-resistant according to ISO 2281. Brief contact with water will not cause damage.
• Level III (5 Bar / 50 meters) watches can withstand water pressure at this level and can be used during showering and short swimming.
• Level IV (10 Bar / 100 meters) means watches can be used for regular swimming and snorkeling.
• Level V (20 Bar / 200 meters) means watches can be used for scuba diving (excluding depths requiring helium-oxygen mixtures).

Watch Care (Уход за вашими часами):

• Never attempt to open the case back or remove the gasket.
• The gasket, which protects the watch from water and dust, should be replaced every 2-3 years.
• If moisture enters the watch, have it checked immediately by your CASIO dealer or distributor.

General Warnings:

• Do not expose watches to extreme temperatures.
• Avoid rough handling and dropping the watch.
• Do not overtighten the strap. Ensure a finger can pass between your wrist and the strap.
• Clean the watch and strap with a dry, soft cloth, or a soft cloth dampened with a water-based mild detergent solution. Never use volatile substances like gasoline, solvents, aerosol cleaners, etc.
• Store the watch in a dry place when not in use.
• Avoid contact with gasoline, cleaning solvents, aerosol sprays, adhesives, paints, etc., as these can cause damage to gaskets, the case, and the finish through chemical reactions.

Special Notes on Straps and Cases:

• Some models have silk-screened designs on their straps. Clean these carefully to avoid damaging the designs.
• For plastic straps: A white powdery substance may appear on the strap. This is harmless and can be removed by wiping. Sweat or moisture, or storage in high humidity, can damage or crack plastic straps. Wipe plastic straps clean of dirt and water with a soft cloth to ensure a long service life.
• For fluorescent cases and straps: Prolonged exposure to direct sunlight may cause the fluorescent color to gradually fade. Prolonged contact with moisture can also cause gradual fading. Wipe any moisture from the surface immediately. Avoid contact with other surfaces. Rubbing fluorescent surfaces may transfer the paint.

CASIO COMPUTER CO., LTD. is not liable for any damage or claims arising from the use of this watch.

Charging and Power Saving:

• Before using the watch, place it in light to charge. Refer to the "Battery" section for proper charging.
• If the screen is blank: If the SLEEP indicator is displayed, the watch has entered power saving mode. The power saving function automatically turns off the display and puts the watch into a standby state when it is in darkness for a certain period.
• Power saving is enabled by default. The watch exits standby when placed in a well-lit area, any button is pressed, or the watch is tilted to activate the auto-illumination function. The screen takes about 2 seconds to turn on. See the "Power Saving Mode" section for more details.

Radio-Controlled Current Time Mode (РЕЖИМ ТЕКУЩЕГО ВРЕМЕНИ С РАДИОКОНТРОЛЕМ)

This mode is used for receiving a time signal and adjusting the watch accordingly. The signal includes information on Daylight Saving Time (DST) and Standard Time. Pressing [D] in the Current Time Mode displays the last received time signal (date and time).

Your watch can receive time signals from Rugby (England) and Mainflingen (Germany).

Current Time Display

Shows day of week, month-date, hour:minute:second. The PM indicator appears for models with 12-hour format.

Diagram Description: Shows the Current Time display with indicators for Day of Week (WED), Time (10:58:50), and Month-Date (6-30).

Pressing [D] displays the last received signal screen.

Last Received Signal Display

Shows the date and time of the last successful signal reception.

Diagram Description: Shows the Last Received Signal display with Date (GET 4:02) and Time (10:58:50).

World Time Mode (Режим Всемирного времени)

Displays GMT time.

Setting World Time

1. Enter World Time Mode.
2. Use [D] (+) and [B] (-) buttons to select the city code for the time you want to use as Local Time.
3. Use [C] to move the flashing indicator to the DST (Daylight Saving Time) setting.
4. Select AUTO for automatic DST adjustment based on the received signal.
5. Press [A] twice to exit the setting mode. The first press of [A] enters the 12/24-hour format setting; the second press exits setting mode.

Time Record Mode (Режим записи времени)

This mode allows you to record up to 30 sets of current readings (month, date, hour, minute, second, DST). This function can be used to record the start and end times of an event.

How to Record Time

In Current Time Mode, press and hold [B] to record the current time (month, date, hour, minute, second, DST). The recorded time blinks for 2 seconds, is assigned a number, and the Current Time display appears. Records are numbered sequentially from 01 to 30. If memory is full, record #1 is deleted, other records shift up, and new data is saved as #30.

How to Read Data

In Time Record Mode, use [D] (+) and [B] (-) to scroll through records. The most recent record appears first if new data was saved since last entry into this mode. Otherwise, the last viewed record is displayed.

How to Delete Data

In Time Record Mode, press and hold [A] to delete all records. If memory is empty, all values are replaced with dashes (-).

Stopwatch Mode (Режим Секундомера)

This mode allows you to measure elapsed time, split times, and the first two finishers in a competition. The measurement range is up to 23 hours, 59 minutes, and 59.99 seconds. The stopwatch will reset to zero if stopped and restarted. If you exit Stopwatch Mode while a split time is displayed, the total elapsed time will be shown. Measurement continues even if you change modes.

• a) Cumulative Time Measurement: [Start] ➡️ [Stop] ➡️ [Restart] ➡️ [Stop] ➡️ [Reset]
• b) Split Time Measurement: [Start] ➡️ [Split] ➡️ [Unsplit] ➡️ [Stop] ➡️ [Reset]
• c) Split Time and 1st/2nd Place Finish Measurement: [Start] ➡️ [Split] ➡️ [Stop] ➡️ [Reset] (Records 1st place time, then 2nd place time).

Alarm Mode (Режим Звуковых сигналов)

This mode includes 4 standard alarms, a snooze alarm (SNZ), and an hourly chime (SIG). You can also enable or disable the hourly chime.

How to Set an Alarm

1. In Alarm Mode, use [D] to select the alarm number you want to set (AL1 to AL4).
2. Press and hold [A]. The hour digits will flash, indicating they can be adjusted.
3. Press [C] to move the flashing indicator between hour and minute digits.
4. Use [D] to increase the flashing digit and [B] to decrease it.
5. Press [A] to exit the setting mode. The alarm is automatically enabled.

How the Alarm Works

An alarm sounds for 10 seconds at the set time, regardless of the current mode. If the snooze function (SNZ) is selected, the alarm will repeat every 5 minutes up to 7 times, unless stopped. Press any button to stop the alarm. If an alarm operation coincides with a time signal reception, the reception will be canceled. Pressing [D] during a snooze interval will return the watch to Current Time Mode and stop the snooze operation. The SNZ indicator flashes during snooze. Alarm indicators appear in all modes.

How to Check Alarm Sound

In Alarm Mode, press and hold [B] to test the alarm sound.

How to Select Alarm Type

1. In Alarm Mode, use [D] to select the desired alarm.
2. Pressing [B] cycles through the following states: Alarm OFF ➡️ Alarm ON. The alarm indicator remains on screen if an alarm is enabled.

How to Enable/Disable Hourly Chime

1. In Alarm Mode, use [D] to select the Hourly Chime (SIG).
2. Press [B] to toggle the signal ON or OFF. The SIG indicator appears in all modes when enabled.

Time Signal Reception

Your watch can receive a time signal and automatically adjust the time. If you are outside the reception range, you can set the time manually.

Time Signal Reception (Прием сигнала точного времени)

Your watch can receive a time signal and adjust its time automatically. There are two reception methods: automatic and manual.

• Automatic Reception: The watch automatically receives the time signal five times a day at 0:00, 1:00, 2:00, 3:00, and 4:00 AM. If any of these operations are unsuccessful, the reception will be attempted again at 5:00 AM.
• Manual Reception: You can initiate signal reception by performing specific button operations (see "Manual Signal Reception").

Important Notes for Reception:

• Place the watch near a window, away from metal objects, with the 12 o'clock position facing the window.
• Reception may be difficult or impossible near TVs, refrigerators, computers, inside reinforced concrete structures, near mountains, underground, in tunnels, near high-voltage power lines, neon signs, or radio transmitters causing interference. It can also be difficult near railways, highways, airports, or while on a train or in a car.
• Reception is generally better at night than during the day.

Signal Reception Indicator (Об индикаторе приема сигнала)

The signal reception indicator shows the quality of reception. The appearance of the indicator varies by model. For optimal reception, place the watch in an area with the strongest signal.

Diagram Description: Shows indicators for weak signal (Level 1) and strong signal (Level 4) for modules 2858/2859 and 2860/2861.

Even in an optimal reception area, it takes about 10 seconds for the indicator to show a strong signal. Use this indicator to check signal strength and find the best position for the watch during reception.

The Level 4 signal reception indicator remains on screen in all modes after reception.

The indicator does not appear if the signal was not received or after manual time/date adjustment. Level 4 indicator only appears after successful reception of both time and date. If only time is received, the indicator will not appear. Level 4 indicates at least one signal was successfully received. Note that the indicator is erased every day at 3:00 AM.

Manual Signal Reception (Принудительный прием сигнала калибровки)

1. Place the watch on a flat surface with the 12 o'clock side facing the signal transmitter. Note that reception may be weak if the back or side of the watch faces the transmitter.
2. In Current Time Mode, press and hold [D] for 2 seconds until a beep is heard.
3. Press [D] to start signal reception.

Reception takes 2 to 5 minutes, sometimes up to 12 minutes. Do not move the watch or press buttons during this time.

After reception is complete, the screen will display the last received signal. To interrupt reception and return to Current Time Mode, press [D]. If the signal is not received, an ERR message will appear for one or two minutes, after which the watch will return to Current Time Mode. You can also switch from the error screen or last signal screen to Current Time Mode by pressing [D].

Current Time Mode (РЕЖИМ ТЕКУЩЕГО ВРЕМЕНИ)

This mode is used for setting and viewing the time and date. It also explains how to set the time and date manually.

Pressing [D] in Current Time Mode displays the screen of the last received time signal (date and time).

Diagram Description: Shows the Current Time display with indicators for Day of Week (WED), Time (10:58:50), and Month-Date (6-30).

Press [D] to view the last received signal.

Diagram Description: Shows the Last Received Signal display with Date (GET 4:02) and Time (10:58:50).

Manual Time and Date Setting (Принудительная установка времени и даты)

The displays in Current Time and World Time modes are interconnected. Therefore, to obtain accurate times for other cities, you must set your Local Time correctly. You also need to set the signal reception, select your city code, time format, and enable or disable the power saving mode.

How to Manually Set Time and Date

1. In Current Time Mode, press and hold [A]. The city code will flash, indicating entry into setting mode.
2. Press [A] or [C] to cycle through the flashing digits: City Code ➡️ DST ➡️ 12/24-Hour Format ➡️ Seconds ➡️ Minutes ➡️ Hours ➡️ Year ➡️ Month ➡️ Date.
3. Use [D] (+) and [B] (-) to adjust the flashing digits.
4. Press [A] twice to exit setting mode.

Note: The seconds are reset to 00. If the seconds were between 30 and 59 when [D] was pressed, the minutes will increment by 1. If seconds were between 00 and 29, minutes will not change. The day of the week is set automatically according to the date. The year can be set from 2000 to 2099. The watch has a built-in automatic calendar that accounts for leap years and different month lengths. Once the date and time are set, they will remain accurate unless the battery power drops to Level 4.

The current time for all cities is calculated based on the difference from Greenwich Mean Time (GMT) for each city, using the Local Time set in Current Time Mode. The watch calculates the difference from GMT based on Coordinated Universal Time (UTC).

World Time Mode (РЕЖИМ ВСЕМИРНОГО ВРЕМЕНИ)

This mode allows you to view the current time in any of the 30 cities (29 time zones) worldwide. Full information on city codes is provided in the table at the end of this manual. The current time for all cities in this mode is calculated based on the difference from Greenwich Mean Time (GMT) using the Local Time.

Viewing Other Cities

In World Time Mode, press [D] to scroll through city codes to the east, and [B] to scroll to the west.

If the time is displayed incorrectly, check the Current Time Mode settings, the city code for your Local Time, and make necessary adjustments.

Switching Between Standard and Daylight Saving Time

1. In World Time Mode, display the city code for which you want to set Standard or Daylight Saving Time, using buttons [B] and [D].
2. Press and hold [A] to toggle the watch between Daylight Saving Time (DST indicator on screen) and Standard Time (no indicator).

Setting the Daylight or Standard Time affects only the city code currently displayed. It does not apply to other cities. The DST indicator appears whenever a city for which DST is active is displayed. Daylight Saving Time is one hour ahead to make better use of daylight. Note that not all countries or regions use this adjustment. The watch will perform time signal reception even if it is in World Time Mode at the reception time. The time set in this mode will be adjusted according to the selected Local Time.

Time Record Mode (РЕЖИМ ЗАПИСИ ВРЕМЕНИ)

In this mode, you can save up to 30 records of current readings (month, date, hour, minute, second, DST) by simply pressing a button. You can use this function to record the start and end times of an event.

How to Record Time

In Current Time Mode, press and hold [B] to record the Local Time (month, date, hour, minute, second, DST). The recorded time blinks for 2 seconds, is assigned a number, and then the Current Time display appears. Records are numbered sequentially from 01 to 30. Saving a record when the memory already contains 30 entries will automatically delete record #1, shift the remaining entries up by one number, and save the new data under number 30.

How to Read Data

In Time Record Mode, you can scroll through the memory entries using buttons [D] (+) and [B] (-). If you saved a new entry since you last entered Time Record Mode, the newest entry will appear first. Otherwise, the record you were last viewing will be displayed.

How to Delete Data

To delete all records from memory, press and hold [A] in Time Record Mode. If there are no records in memory, all values are replaced with dashes (-).

Alarm Mode (РЕЖИМ ЗВУКОВЫХ СИГНАЛОВ)

This mode provides 4 standard alarms and a snooze alarm (SNZ). You can also enable or disable the Hourly Chime (SIG). You can also enable or disable the Hourly Chime.

How to Access Alarm Screens

In Alarm Mode, press [D] to select an alarm:

• AL1, AL2, AL3, AL4: Standard alarms
• SNZ: Snooze alarm
• SIG: Hourly chime

How to Set an Alarm

1. In Alarm Mode, press [D] to select the alarm number you wish to use.
2. After selecting the desired alarm number, press and hold [A]. The hour digits will flash, indicating that this value can be changed.
3. Press [C] to move the flashing indicator between the hour and minute digits.
4. Press [D] to increase the flashing digit and [B] to decrease it.
5. Press [A] to exit the setting mode. The alarm is automatically enabled.

How the Alarm Works

An alarm sounds for 10 seconds at the set time, regardless of the watch's current mode. If you select the snooze alarm, it will repeat every 5 minutes up to 7 times, unless you stop it. Press any button to stop the alarm sound. If any alarm operation (alarm sound, snooze operation) coincides with a time signal reception, the reception operation will be canceled. Calling up the current time display within the 5-minute interval between snooze alarms will stop the snooze operation. The SNZ indicator flashes on the screen while the snooze function is active. Alarm indicators are displayed on the screen in all modes.

Checking the Alarm Sound

To check the alarm sound, press and hold [B] in Alarm Mode.

How to Select Alarm Type

1. In Alarm Mode, press [D] to select the alarm number you wish to use.
2. Pressing [B] cycles through the following states: Alarm sound OFF ➡️ Alarm sound ON. If any alarm is enabled, its indicator remains on the screen in all modes.

Enabling and Disabling Hourly Chime

1. In Alarm Mode, use [D] to select the Hourly Chime (SIG).
2. Press [B] to enable or disable this signal. The indicator for the enabled Hourly Chime is displayed in all modes.

Stopwatch Mode (РЕЖИМ СЕКУНДОМЕРА)

This mode allows you to measure elapsed time, split times, and the first two finishers in a competition. The measurement range is limited to 23 hours, 59 minutes, and 59.99 seconds. The stopwatch will reset to zero if stopped and restarted. If you exit Stopwatch Mode while a split time is displayed, that value will be replaced by the total elapsed time. Measurement will continue even if you exit Stopwatch Mode.

Diagram Description: Shows the Stopwatch display with indicators for Time (00:00:00.00) and 1/100 second.

• a) Cumulative Time Measurement: [Start] ➡️ [Stop] ➡️ [Restart] ➡️ [Stop] ➡️ [Reset]
• b) Split Time Measurement: [Start] ➡️ [Split] ➡️ [Unsplit] ➡️ [Stop] ➡️ [Reset]
• c) Split Time and 1st/2nd Place Finish Measurement: [Start] ➡️ [Split] ➡️ [Stop] ➡️ [Reset] (Records 1st place time, then 2nd place time).

Current Time Mode (РЕЖИМ ТЕКУЩЕГО ВРЕМЕНИ)

This mode is used for setting and viewing the time and date. It also explains how to set the time and date manually.

Pressing [D] in Current Time Mode displays the screen of the last received time signal (date and time).

Diagram Description: Shows the Current Time display with indicators for Day of Week (WED), Time (10:58:50), and Month-Date (6-30).

Press [D] to view the last received signal.

Diagram Description: Shows the Last Received Signal display with Date (GET 4:02) and Time (10:58:50).

How to Manually Set Time and Date

1. In Current Time Mode, press and hold [A]. The city code will flash, indicating entry into setting mode.
2. Press [A] or [C] to cycle through the flashing digits: City Code ➡️ DST ➡️ 12/24-Hour Format ➡️ Seconds ➡️ Minutes ➡️ Hours ➡️ Year ➡️ Month ➡️ Date.
3. Use [D] (+) and [B] (-) to adjust the flashing digits.
4. Press [A] twice to exit setting mode.

Note: The seconds are reset to 00. If the seconds were between 30 and 59 when [D] was pressed, the minutes will increment by 1. If seconds were between 00 and 29, minutes will not change. The day of the week is set automatically according to the date. The year can be set from 2000 to 2099. The watch has a built-in automatic calendar that accounts for leap years and different month lengths. Once the date and time are set, they will remain accurate unless the battery power drops to Level 4. The current time for all cities is calculated based on the difference from Greenwich Mean Time (GMT) for each city, using the Local Time set in Current Time Mode. The watch calculates the difference from GMT based on Coordinated Universal Time (UTC).

12/24-Hour Time Format

The 12- or 24-hour format selected in Current Time Mode applies to all other modes. With the 12-hour format, a 'P' indicator appears to the left of the hour for times from noon to 11:59 PM. From midnight to 11:59 AM, there is no indicator for modules 2858, 2859, 2860, 2861, 2869, 2870. Modules 2866 and 2867 do not have an indicator before noon. With the 24-hour format, time is displayed from 0:00 to 23:59 without an indicator.

Power Saving Function

If this function is enabled, the watch automatically enters standby mode whenever it remains in an unlit area for a certain period. The table below shows how the watch operates based on the time spent in darkness.

If your watch is covered by your clothing sleeve, it may enter standby mode.

How to Wake the Watch from Standby Mode

• Place the watch in a well-lit area. The screen will turn on after 5 seconds.
• Press any button.
• Tilt the watch towards you.

Specifications (СПЕЦИФИКАЦИЯ)

• Accuracy at Normal Temperature: +/- 15 seconds per month (without time signal reception).
• Current Time Mode: Hours, minutes, seconds, PM/AM indicator, month, date, day of week. 12/24-hour format switching.
• Calendar System: Auto-calendar, programmed from 2000 to 2099.
• Additional Features: Local time (any of 34 cities), Standard Time / Daylight Saving Time.
• Time Signal Reception: Automatic reception (5 times daily at 0:00, 1:00, 2:00, 3:00, 4:00 AM); Manual reception; Last signal screen.
• Calibration Signal: Station name: DCF77, Mainflingen, Germany, Frequency: 77.5 kHz, reception range: approx. 1,500 km. MSF60, Rugby, England, Frequency: 60 kHz, reception range: approx. 1,500 km.
• World Time Mode: 30 cities, Daylight/Standard Time, Local Time.
• Time Record Mode: 30 records containing hours, minutes, seconds, DST/Standard Time, AM/PM indicator.
• Alarm Mode: 4 standard alarms, snooze alarm, hourly chime.
• Stopwatch Mode: Measurement units: 1/100 sec., measurement range: 23:59'59.59", elapsed time, split time, 2 first finishers.
• Additional Features: Electroluminescent backlight, auto-illumination, battery power indicator, power saving function.

Battery (БАТАРЕЯ)

This watch is equipped with a solar power system and a rechargeable battery that is charged by electricity converted from solar energy.

Important!

• Storing the watch in darkness for extended periods, wearing it on the inside of your wrist, or covering it with clothing sleeves can significantly reduce battery power.

Diagram Description: Shows a solar panel icon (☀️) and a battery icon (?).

Battery Type

CTL1616. Never install any other type of battery, as this may cause the watch to malfunction.

Battery Life

Approximately 6 months (from full charge to Level 3, if the watch is not exposed to light) under the following conditions:

• 5 signal receptions per day
• 10 seconds of alarm operation per day
• 1.5 seconds of backlight operation per day
• 18 hours of normal time display per day, 6 hours of standby mode

Precautions for Battery Charging

Avoid overheating the watch while charging the battery. Do not charge the watch in the following locations:

• On the dashboard of a car parked in direct sunlight.
• Too close to an incandescent lamp.
• Directly under sunlight or exposed to intense heat for extended periods.

Warning: Charging the watch in direct sunlight can cause damage due to overheating. Do not charge the watch in the locations listed above.

Charging Recommendations

After fully charging the watch, all functions will operate for approximately 5 months if used under the following conditions:

• The watch is not exposed to light.
• 18 hours per day of normal time display, 6 hours of standby mode.
• One 1.5-second backlight operation per day.
• One 10-second alarm per day.
• Five time signal receptions per day.

Automatic update of date and day of the week upon reception of calibration signal will occur from January 1, 2000, to December 31, 2039. After January 1, 2040, date setting will not be performed. Signals received for leap years differ from others. Although the watch should receive time (hours, minutes, seconds) and date (year, month, day), under certain conditions only the time signal may be received. When all five signals are received successfully, the watch uses the data from the last signal for adjustment. If only one signal is received successfully, its data will be used for adjustment. The watch normally receives time and date signals, and this data is shown on the Last Signal screen. If only the time signal is received, the current date will be displayed on the Last Signal screen. If you are in an area where the signal cannot be received, the watch will continue to display the time with the accuracy specified in the technical specifications. If you encounter problems with signal reception or if the display shows incorrect time after reception, check the city code, DST, or auto-reception settings. The following are the factory default settings:

Transmitter

Your watch is designed to receive time signals transmitted from Rugby, England, and Mainflingen, Germany. You can select one of these transmitters or set the watch to automatically select the transmitter that provides the strongest signal.

Automatic time signal reception is enabled whenever you select AUTO, DCF, or MSF for the reception mode. If you select OFF, automatic reception is disabled. Since the watch checks signals from both transmitters when AUTO is selected, reception may take up to 12 minutes.

Reference Information (СПРАВОЧНАЯ ИНФОРМАЦИЯ)

This section contains more detailed technical information about watch operations and instructions for various functions.

Auto Return Operation

If you do not press any button for two or three minutes while a cursor or digit is flashing, the flashing will stop, the watch will automatically save any settings made up to that point, and exit the setting mode. If you do not perform any operation in Alarm or Time Record modes for two or three minutes, the watch will automatically return to Current Time Mode.

Scrolling Display

The [B] and [D] buttons are used in various modes to scroll through setting values. Pressing and holding these buttons will accelerate the scrolling speed.

Initial Screen

When entering Alarm or World Time modes, the screen will first display the data you were viewing the last time you exited these modes.

Time Signal Reception Guidelines

Strong electromagnetic fields can interfere with accurate time setting. Even if you are within the transmitter's range, the signal may be blocked by mountains or other geological obstacles between the watch and the source. Reception quality depends on weather, atmospheric conditions, and seasonal changes. The time signal travels through the ionosphere. Therefore, factors such as changes in the ionosphere's reflective properties, its movement to higher altitudes due to seasonal atmospheric changes or time of day, can alter the reception range or prevent reception altogether for a period. Time setting based on the received signal has an advantage over any other setting. If you encounter problems with signal reception or if the display shows incorrect time after reception, check the city code, DST, or auto-reception settings.

How to Select Reception Mode

1. In Current Time Mode, press and hold [A] until the city code starts flashing.
2. Press [C] to advance to the reception mode setting.
3. Use [D] to scroll through the available settings and select your desired option:
   • AUTO: Automatic selection of signal from Rugby or Mainflingen.
   • DCF: Reception of signal from Mainflingen.
   • MSF: Reception of signal from Rugby.
   • OFF: Disable automatic reception.

Note: When your city code is anything other than LON, PAR, BER, or ATH, the transmitter indicator will show "OFF" instead of the transmitter name.

How to Enable Power Saving Function

1. In Current Time Mode, press and hold [A] until the city code starts flashing.
2. Press [A] again.
3. Press [C] 7 times until the power saving ON/OFF setting screen appears.
4. Press [D] to enable (ON) or disable (OFF) the power saving function.
5. Press [A] to exit the setting mode.

Backlight Operation

Your watch uses an electroluminescent backlight that loses its light-emitting capability after extended use. The backlight is difficult to see in direct sunlight. A faint sound may be heard when the display is illuminated; this is due to the vibration of the backlight elements and is not an indication of malfunction. The backlight automatically turns off during alarm sounds. Frequent use of the backlight shortens battery life.

Caution: It is not recommended to wear the watch on the inside of your wrist, as this may cause accidental activation of the auto-illumination function, shortening battery life. If you choose to wear the watch on the inside of your wrist, disable this function. The backlight turns off after 1 second, even if you continue to tilt the watch towards you. Auto-illumination may not activate if the watch face is tilted more than 15 degrees to the left or right. Ensure your hand is parallel to the ground. Static electricity or magnetic fields can interfere with proper auto-illumination. If auto-illumination does not work, try returning the watch to its starting position (parallel to the ground), shake it, and tilt it towards you again. Under certain conditions, the backlight may activate only 1 second after performing the above actions.

To prevent the battery from draining rapidly, the auto-illumination function turns off automatically after 6 hours of continuous activation. To use it again, repeat the activation procedure.

Battery (БАТАРЕЯ)

This watch is equipped with a solar power system and a rechargeable battery that is charged by electricity converted from solar energy.

Important! Storing the watch in darkness for extended periods, wearing it on the inside of your wrist, or covering it with clothing sleeves can significantly reduce battery power.

Diagram Description: Shows a solar panel icon (☀️) and a battery icon (?).

Battery Type

CTL1616. Never install any other type of battery, as this may cause the watch to malfunction.

Battery Life

Approximately 6 months (from full charge to Level 3, if the watch is not exposed to light) under the following conditions: 5 signal receptions per day, 10 seconds of alarm operation per day, 1.5 seconds of backlight operation per day, 18 hours of normal time display per day, 6 hours of standby mode.

Precautions for Battery Charging

Avoid overheating the watch while charging the battery. Do not charge the watch in the following locations:

• On the dashboard of a car parked in direct sunlight.
• Too close to an incandescent lamp.
• Directly under sunlight or exposed to intense heat for extended periods.

Warning: Charging the watch in direct sunlight can cause damage due to overheating. Do not charge the watch in the locations listed above.

Charging Recommendations

After fully charging the watch, all functions will operate for approximately 5 months if used under the following conditions: The watch is not exposed to light; 18 hours per day of normal time display, 6 hours of standby mode; One 1.5-second backlight operation per day; One 10-second alarm per day; Five time signal receptions per day.

Automatic update of date and day of the week upon reception of calibration signal will occur from January 1, 2000, to December 31, 2039. After January 1, 2040, date setting will not be performed. Signals received for leap years differ from others. Although the watch should receive time (hours, minutes, seconds) and date (year, month, day), under certain conditions only the time signal may be received. When all five signals are received successfully, the watch uses the data from the last signal for adjustment. If only one signal is received successfully, its data will be used for adjustment. The watch normally receives time and date signals, and this data is shown on the Last Signal screen. If only the time signal is received, the current date will be displayed on the Last Signal screen. If you are in an area where the signal cannot be received, the watch will continue to display the time with the accuracy specified in the technical specifications. If you encounter problems with signal reception or if the display shows incorrect time after reception, check the city code, DST, or auto-reception settings. The following are the factory default settings:

Transmitter

Your watch is designed to receive time signals transmitted from Rugby, England, and Mainflingen, Germany. You can select one of these transmitters or set the watch to automatically select the transmitter that provides the strongest signal.

Automatic time signal reception is enabled whenever you select AUTO, DCF, or MSF for the reception mode. If you select OFF, automatic reception is disabled. Since the watch checks signals from both transmitters when AUTO is selected, reception may take up to 12 minutes.

Product Information (ИНФОРМАЦИЯ О ТОВАРЕ)

• Name: Electronic / Electro-mechanical Quartz Wristwatch (Men's/Women's)
• Brand: CASIO
• Manufacturer: CASIO COMPUTER Co., Ltd. (КАСИО Компьютер Ко. Лимитед), 1-6-2, Hon-machi 1-chome, Shibuya-ku, Tokyo 151-8543, Japan
• Importer: OOO "Kasio", 127015, Russia, Moscow, ul. Butyrskaya, d. 77
• Warranty Period: 1 year
• Address for Claims: As indicated on the warranty card.

City Code Table (ТАБЛИЦА КОДОВ ГОРОДОВ)

Data as of June 2000.