Casio Watch User Manual
Important Information
Before You Begin
Battery
If you notice signs of low battery power (dim display or no backlight), replace the battery at your nearest CASIO dealer or distributor. The battery included in your watch is for test purposes and may have a shorter service life than a standard battery.
Water Resistance
Watches are classified into categories (from I to V) according to their water resistance. Refer to the table below to determine the rules for using your watch.
| Marking on Case | Splashes, Washing, Rain | Swimming, Snorkeling | Diving with Scuba Gear |
| I | No | No | No |
| II WATER RESISTANT | Yes | No | No |
| III 50M WATER RESISTANT | Yes | Yes | No |
| IV 100M WATER RESISTANT | Yes | Yes | No |
| V 200M WATER RESISTANT / 300M WATER RESISTANT | Yes | Yes | Yes |
Notes for Corresponding Sections:
- The watch is not water resistant. Avoid exposure to any moisture.
- If the watch is exposed to salt water, rinse it thoroughly and dry it.
- If the watch is exposed to salt water, rinse it thoroughly and dry it.
- The watch can be used for scuba diving (except for depths requiring a helium-oxygen mixture).
ATTENTION!!! For all watch categories, it is prohibited to:
- Press buttons underwater
- Adjust hands underwater
- Unscrew the crown underwater
IMPORTANT!!! Some water-resistant watches feature leather straps. Do not wear these watches while swimming or engaging in any activity where the strap may be submerged in water.
Care of Your Watch
The rubber gasket that protects the watch from water and dust should be replaced every 2-3 years. If water enters the watch, have it checked immediately by your nearest CASIO dealer or distributor. Do not expose the watch to extreme high or low temperatures. Although the watch is designed for normal use, avoid rough handling and do not drop 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 solvents (e.g., gasoline, thinners, aerosol cleaners, etc.). When not in use, store the watch in a dry place. Avoid contact with gasoline, cleaning solvents, aerosol sprays, adhesives, paints, etc. Chemical reactions caused by these substances can damage gaskets, the case, and the watch's finish. Some models have silk-screened designs on their straps. Be careful when cleaning such straps 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 on the resin strap, or storing it in high humidity, can lead to damage, tearing, or cracking. To ensure a long service life for the resin strap, wipe it clean of dirt and water with a soft cloth as often as possible.
For Watches with Fluorescent Cases and Straps...
Prolonged exposure to direct sunlight may cause the fluorescent color to fade gradually. Prolonged contact with moisture may cause the fluorescent color to fade gradually. If any moisture gets on the watch surface, wipe it off as soon as possible. Rubbing a surface with fluorescent paint against another surface can transfer the fluorescent paint to that surface.
CASIO COMPUTER CO., LTD. is not responsible for any damage caused by the use of this watch and accepts no claims from third parties.
Operating Modes Overview
Diagram shows the watch face in Current Time Mode. Buttons A, B, C, D are indicated. Module numbers 2734 and 2758 are shown. Module numbers 3748 and 3749 are shown.
Pressing button "C" sequentially cycles through the modes: Current Time Mode – World Time Mode – Alarm Mode – Date Reminder Mode – Data Bank Mode – Analog Time Mode – Stopwatch Mode – Current Time Mode.
To turn on the backlight in any mode, press [Button B].
Calibration
This watch automatically corrects the time based on the calibration signal. However, you can also set the time manually. In Current Time Mode, press [Button A] to display the time of the last calibration signal reception. Before using the watch, set your home city.
Setting Home City
- Enter Current Time Mode.
- Press and hold [Button A] until the signal transmitter indicator flashes ("A/T" (Auto Transmitter Selection), "MSF" (Mainflingen, Germany), "DCF" (Rugby, England)).
- If none of these indicators appear on the display, press [Button D].
- Press [Button C] to proceed to city code settings.
- Use [Button B] and [Button D] to select your desired city code.
- Press [Button A] twice to finish.
Calibration Signal
This watch receives a calibration signal and updates the time accordingly. The signal transmission centers are located in Germany (25km from Frankfurt) and Rugby, England. The signal covers a radius of 1500km. The signal may be weak at distances over 500 meters. The broadcast signal is also affected by weather conditions, atmospheric pressure, and temperature. Factors that can weaken the signal include:
- Being near a TV, computer, or other household appliances,
- Being in a subway or tunnel,
- Being at an airport, train station, or busy highway,
- Being near radio stations or signal transmission towers,
- Electrostatic interference.
There are two types of calibration signal reception. With auto-calibration enabled, the watch automatically receives the signal five times daily and corrects the time. With forced calibration, you initiate the signal reception by pressing a button:
- Place your watch horizontally.
- In the Signal Reception Mode, press and hold [Button D] for 2 seconds until a beep is heard.
- Release [Button D]. Flashing of the current time indicates the start of signal reception.
- Signal reception takes 2 to 5 seconds. Be careful not to move your watch during reception.
- After reception, the watch display will show the data from the last reception.
To stop the reception process and return to Current Time Mode, press [Button D]. If reception fails, the display will show "ERR" for 1-2 minutes before automatically returning to Current Time Mode. You can return to Current Time Mode by pressing [Button D].
Auto-Calibration Signal
With auto-calibration enabled, the watch automatically receives the signal five times a day: at 0:00, 1:00, 2:00, 3:00, and 4:00 AM. The watch will attempt an additional reception at 5:00 AM if none of the previous attempts were successful. Auto-calibration only occurs when the watch is in Current Time Mode or World Time Mode.
Signal Reception Indicator
This indicator shows the strength of the received calibration signal. When the watch is positioned for optimal reception, the indicator will be fully displayed. Try to position the watch for successful signal reception whenever possible. It takes about 10 seconds for the watch to establish the signal reception strength shown on the indicator. The calibration indicator is present in all watch modes. If the calibration indicator is not displayed, signal reception is not occurring. Perform a manual calibration or check your watch settings.
Enabling/Disabling Auto-Calibration Signal
- In Current Time Mode, press and hold [Button A] until the transmitter indicator appears.
- Press [Button C] three times to enter the auto-calibration signal enable/disable setting.
- If your home city does not support auto-calibration, "- -" will appear on the display.
- Press [Button D] to enable ("ON") or disable ("OFF") the auto-calibration signal.
- Press [Button A] twice to finish.
Switching Current Time and Last Reception Time
- In Current Time Mode, press [Button A] to cycle through the display sequence: Month/Day/Day of Week – Hour/Minute/Second – Month/Day.
- In Current Time Mode, press [Button D] to switch between the current time and the time of the last calibration signal reception (date/time). The "GET" indicator appears when the last reception time is displayed.
World Time Mode
In this mode, you can view the local time for any of 30 cities worldwide (29 time zones).
Viewing Time in Another Time Zone
- In World Time Mode, press [Button D] to select the city whose time you want to view.
- To enable/disable Daylight Saving Time (DST) for another city, select the city name and press and hold [Button A]. When DST is enabled, "DST" will appear next to the city name on the display.
| City Code | City | Difference from Greenwich (GMT) | Other Major Cities in Time Zone |
| HNL | Honolulu | -10.00 | Papeete |
| ANC | Anchorage | -09.00 | Nome |
| LAX | Los Angeles | -08.00 | San Francisco, Las Vegas, Vancouver, Seattle, Dawson City |
| DEN | Denver | -07.00 | El Paso, Edmonton |
| CHI | Chicago | -06.00 | Houston, Dallas, New Orleans, Mexico City, Winnipeg |
| NYC | New York | -05.00 | Montreal, Detroit, Miami, Boston, Panama City, Havana, Lima, Bogota |
| CCS | Caracas | -04.00 | |
| RIO | Rio de Janeiro | -03.00 | Sao Paulo, Buenos Aires, Brasilia, Montevideo |
| --- | -02.00 | ||
| --- | -01.00 | ||
| GMT | +00.0 | Prague, Dublin, Lisbon, Casablanca, Dakar, Abidjan | |
| LON | London | +00.0 | |
| PAR | Paris | +01.00 | Milan, Rome, Amsterdam, Algiers |
| BER | Berlin | +01.0 | Vienna, Hamburg, Frankfurt, Barcelona, Stockholm |
| ATH | Athens | +02.0 | Helsinki, Istanbul, Beirut, Damascus, Cape Town |
| CAI | Cairo | +02.00 | |
| JRS | Jerusalem | +02.00 | |
| JED | Jeddah | +03.00 | Kuwait, Riyadh, Aden, Addis Ababa, Nairobi, Moscow, Shiraz |
| THR | Tehran | +03.05 | |
| DXB | Dubai | +04.00 | Abu Dhabi, Muscat |
| KBL | Kabul | +04.05 | |
| KHI | Karachi | +05.00 | Male |
| DEL | Delhi | +05.50 | Mumbai, Kolkata |
| DAC | Dhaka | +06.00 | Colombo |
| RGN | Yangon | +06.50 | |
| BKK | Bangkok | +07.00 | Jakarta, Hanoi, Vientiane |
| HKG | Hong Kong | +08.00 | Singapore, Kuala Lumpur, Beijing, Manila, Perth, Ulaanbaatar |
| TYO | Tokyo | +09.00 | Seoul, Pyongyang |
| ADL | Adelaide | +09.05 | Darwin |
| SYD | Sydney | +10.00 | Melbourne, Guam, Rabau |
| NOU | Noumea | +11.00 | Vila |
| WLG | Wellington | +12.00 | Nadi, Naura, Christchurch |
Alarm Mode
You can set various daily alarm sounds. The alarm will sound for 10 seconds at the set time. If the hourly time signal is enabled, a short beep will sound at the start of each hour. If a repeat alarm is set, it will sound 7 times every five minutes until you turn it off. If a countdown alarm is set, the remaining time until the alarm sounds will be displayed.
Setting Alarms
- In Alarm Mode, press [Button D] to select the alarm type: AL1 → AL2 → AL3 (Countdown Alarm) → SNZ (Snooze Alarm) → SIG (Hourly Time Signal).
- After selecting the alarm type, press and hold [Button A]. The hour digits will flash, indicating they are selected for setting. The alarm will automatically turn on at this point.
- Press [Button C] to cycle through the setting digits: Hours – Minutes – Hours.
- Press [Button D] to increase and [Button B] to decrease the selected value. Holding the button down allows for faster adjustment.
- Press [Button A] to finish setting the time and date.
Checking Alarm Sound
In Alarm Mode, press [Button D] to test the alarm sound.
Enabling/Disabling Alarm Sound
- In Alarm Mode, press [Button D] to select the alarm type.
- After selecting the alarm type, press [Button A] to enable or disable the selected alarm type.
- If any of the 4 alarms are selected, "ALM" will appear on the display.
- If a repeat alarm is selected, "SNZ" will appear on the display.
- If the hourly time signal is selected, "SIG" will appear on the display.
- If a countdown alarm is selected, the "TAL" indicator will appear on the display.
Date Reminder Mode
In Date Reminder Mode, you can set up to five specific dates. When a set date is reached, the 24-hour indicator and the "!" indicator will flash.
Setting Dates
- In Date Reminder Mode, press [Button D] to select the date to set: DA1 – DA2 – DA3 – DA4 – DA5 – DA1.
- Press and hold [Button A] until the month digits flash.
- Press [Button C] to cycle through the setting digits: Month – Day – Month.
- Use [Button B] and [Button D] to change the values.
- Press [Button A] to finish setting.
Enabling/Disabling Date Reminder
- In Date Reminder Mode, press [Button D] to select the date to set: DA1 – DA2 – DA3 – DA4 – DA5 – DA1.
- Press [Button A] to enable ("ON") or disable ("OFF") the date reminder function.
Data Bank Mode
In this mode, you can store up to 30 entries, each containing time and date information. Time entries are stored chronologically according to their date and time.
Saving Time Entries
In Data Bank Mode, press [Button D] to save the current time and date to the watch's memory.
Viewing Saved Entries
- In Data Bank Mode, press [Button A].
- Use [Button D] to scroll through the saved time and date entries.
Deleting Saved Entries
In Data Bank Mode, press and hold both [Button A] and [Button D] simultaneously to delete all saved entries.
Stopwatch Mode
The Stopwatch Mode allows you to measure elapsed time, split times, and dual finishes. The total elapsed time measurement range is limited to 59 minutes 59.99 seconds.
a) Measuring Elapsed Time
[Button D] (Start) – [Button D] (Stop) – [Button D] (Restart) – [Button D] (Stop) – [Button A] (Reset)
b) Measuring Split Times
[Button D] (Start) – [Button A] (Split) – [Button A] (Resume) – [Button D] (Stop) – [Button A] (Reset)
c) Dual Finish
[Button D] (Start) – [Button A] (Split 1st Finish) – [Button D] (2nd Finish. The result of the 1st finish is displayed) – [Button A] (Resume. The result of the 2nd finish is displayed) – [Button A] (Reset)
Current Time Mode
In this mode, you can set the time and date. The 12/24-hour format is set according to your current time setting. When using the 12-hour format, be careful to set AM/PM correctly.
Setting Time and Date
- In Current Time Mode, press and hold [Button A] until the signal transmitter indicator flashes.
- Press [Button A] and [Button C] to cycle through the setting items: [Transmitter – City Code → DST Mode → Auto-Calibration Signal] → [12/24 Hour Format → Seconds → Hours → Minutes → Year → Month → Day].
- If seconds are flashing, press [Button D] to reset the seconds to 00. If you press [Button D] when the seconds are between 30 and 59, the seconds will reset to 00 and 1 minute will be added to the minutes. If seconds are between 00 and 29, the minutes will not change.
- Use [Button B] and [Button D] to adjust the values for minutes, hours, etc.
- To switch between 12-hour and 24-hour formats, press [Button D] in Current Time Mode. The "P" indicator signifies PM (afternoon) in the 12-hour format, while "24" indicates the 24-hour format.
- Use [Button D] and [Button B] to select the city name.
- Press [Button D] to enable/disable Daylight Saving Time. Each press cycles through: Auto DST Enable ("A") – DST Enabled ("ON") – DST Disabled ("OFF") – Auto DST Enable ("A").
- Press [Button D] to enable ("ON") or disable ("OFF") the auto-calibration signal.
- Press [Button D] to switch transmitters. Holding the button down allows for faster adjustment.
- The day of the week is set automatically according to the date.
- The date can be set from January 1, 2000, to December 31, 2039.
- After setting the date and time, press [Button A].
Analog Time Mode
In this mode, the analog time is synchronized with the current time. If the analog time does not match the digital time for any reason, you must set it manually:
- In Analog Time Mode, press and hold [Button A] until the current time digits start flashing.
- Use [Button D] and [Button B] to adjust the current time.
- Each press of [Button D] advances the time by 20 seconds, and each press of [Button B] moves it back by 20 seconds.
- Pressing [Button B] while holding down [Button D] allows for faster time adjustment. Press any button to stop the fast adjustment.
- Press [Button A] to finish setting.
Backlight
In any mode, press [Button B] to turn on the backlight. The watch's backlight uses electroluminescent (EL) elements, whose brightness decreases after prolonged use. The watch emits an audible signal during illumination because the backlight elements vibrate; this is not an indication of malfunction. The backlight may be difficult to see in direct sunlight. Frequent use of the backlight shortens battery life.
Technical Specifications
| Feature | Specification |
| Timekeeping Accuracy | ±15 seconds per month at normal temperature |
| Current Time Mode | Hour, minute, second, AM/PM indicator, Year, Month, Day, Day of Week |
| Calendar System | Auto calendar from 2000 to 2039 |
| Calibration Signal | 12/24 hour format, DST (Daylight Saving Time) |
| Other | Calibration signal reception (at 0:00, 1:00, 2:00, 3:00, and 4:00 AM Germany or England time daily, forced calibration). Auto-calibration, transmitter selection. |
| World Time Mode | Current time in 30 cities (29 time zones) |
| Other | DST (Daylight Saving Time) |
| Date Reminder Mode | 5 entries (time and date) |
| Data Bank Mode | Auto-sort (in chronological order) |
| Other | View saved data, delete saved data. |
| Stopwatch Mode | 5 daily alarms, hourly time signal. |
| Other | Snooze alarm, countdown alarm. |
| Maximum Measurement Range | 59 minutes 59.99 seconds |
| Measurement Modes | Lap times, split times, dual finish mode. |
| Other | Backlight (electroluminescent panel). |
Product Information
Product Name: Electronic / Electro-mechanical Quartz Wristwatches (Men's/Women's)
Brand: CASIO
Manufacturer: 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 Service Organization Address for Claims: As indicated on the warranty card.
Product conforms to GOST 26270-98 (clause 4.35)
Certificate of Conformity No. РОСС RU.АЯ46.Д42228 / РОСС RU.АЯ46.Д42071 / РОСС RU.АЯ46.Д42230
