CASIO EQW-T1010 (Module 5261) User Manual

Important Information

Battery: The battery installed at the factory discharges during shipping and storage. If the display becomes dim, replace the battery at an authorized CASIO service center or dealer.

Water Resistance:

• Do not press buttons underwater.
• Do not move hands underwater.
• Do not unscrew the crown underwater.
• If exposed to saltwater, rinse thoroughly with fresh water and dry.
• Avoid wearing watches with leather straps while swimming or prolonged water contact.

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

Notes:

• Level I: Not water resistant. Avoid any moisture.
• Level II (WR): Water resistant per ISO 2281. Short water contact is fine.
• Level III (5 Bar / 50m): Withstands water pressure equivalent to 5 Bar (50 meters). Suitable for showering and brief swimming.
• Level IV (10 Bar / 100m): Suitable for regular swimming and snorkeling.
• Level V (20 Bar / 200m): Suitable for scuba diving (excluding depths requiring helium-oxygen mix).

Care for Your Watch:

• Never attempt to open the case or remove the back cover yourself.
• Replace the rubber gasket every 2-3 years for water and dust protection.
• If moisture enters the watch, have it checked by a dealer or CASIO distributor immediately.
• Avoid extreme temperatures.
• Wear the watch carefully and avoid drops.
• Strap tightness: Ensure a finger can fit between your wrist and the strap.
• Cleaning: Use a dry soft cloth, or a soft cloth dampened with a mild neutral detergent solution. Never use volatile substances like gasoline, solvents, or spray cleaners.
• Storage: Store in a dry place when not in use.
• Avoid contact with gasoline, cleaning solvents, aerosols, adhesives, paint, etc., as chemical reactions can damage gaskets, case, and polish.
• Silk-screened straps: Clean carefully to avoid damaging designs.
• Plastic straps: A white powdery substance may appear; it is harmless and removable by wiping. Sweat or moisture can damage plastic straps; wipe clean with a soft cloth.
• Fluorescent cases/straps: Prolonged direct sunlight or moisture can fade fluorescent colors. Wipe moisture immediately. Friction can transfer fluorescent paint.

Condensation: Slight condensation on the inside of the glass may occur due to rapid temperature changes. This is a normal physical phenomenon and not a defect.

CASIO COMPUTER CO., LTD. is not liable for any damages that may arise from the use of this watch.

Congratulations on your purchase of a CASIO watch!

This watch does not have a time zone offset of -3.5 hours. Therefore, time for Newfoundland (Canada) may display incorrectly after radio calibration.

About this User Manual: Watch operations are performed using four buttons labeled A, B, C, and D.

Hands and Indicators:

• [1] Hour Hand
• [2] Second Hand
• [3] Minute Hand
• [4] Left Dial Hands: Indicates selected mode
• [5] Lower Dial Hands
• [6] Right Dial Hands
• [7] Date Indicator

The digital numbers in this manual refer to the indicators listed above.

Before Starting to Use the Watch

1. Check Battery Charge Level: Hold [Button C] for approximately 2 seconds to enter Current Time mode. Observe the movement of the second hand [2].

• If the second hand [2] moves smoothly at 1-second intervals, the battery is sufficiently charged.
• If the second hand [2] moves at 2-second intervals or stops, the battery charge is low. Place the watch in a light source for charging. Refer to the "Recharging the Watch" section.

2. Check Home City Code and Daylight Saving Time (DST) settings. For more information, refer to the "Setting Home City Code" section.

3. Set Current Time:

• Set current time by receiving a radio calibration signal. Refer to the "Radio-Controlled Time Calibration" section.
• Set current time manually. Refer to the "Setting Current Time and Date Manually" section.

After completing the above settings, the watch is ready for use.

Recharging the Watch

This watch is powered by a light-sensitive panel and a rechargeable battery. Storing or wearing the watch in conditions where light is unavailable will deplete the battery charge. Try to place the watch in a light source for charging as often as possible.

• When not in use, leave the watch in a location accessible to light.
• Charging is faster when the watch is placed in a location with optimal illumination.
• Remember that charging efficiency decreases when any part of the solar panel is covered by clothing.
• Keep the watch uncovered for as long as possible. Charging time significantly increases if the watch face is partially covered.

Caution: If left to charge in bright light, the watch surface may become hot. Handle the watch with care to avoid burns. The watch surface can also become very hot in the following situations:

• On a car dashboard parked in the sun.
• Near an incandescent lamp.
• Under direct sunlight.

If you do not use the watch for an extended period, store it in a location accessible to light to help maintain the rechargeable battery's charge. The watch will continue to operate even when away from a bright light source. Prolonged use in darkness will deplete the rechargeable battery and may cause some functions to turn off. To ensure normal operation, remember to place the watch in an area with access to bright light.

Battery Charge Level

To check the battery charge level, observe the movement of the second hand [2]:

• If the second hand [2] moves smoothly at 1-second intervals, the battery charge level is 1. All functions operate normally.
• If the second hand [2] moves at 2-second intervals, the battery charge level is 2. Place the watch in a well-lit area for charging as soon as possible. The date indicator [7] will display '1' (initial position). Sound alarms, radio calibration reception, and countdown timer may not work.
• If the second hand [2] does not move, the battery charge level is 3. All functions are turned off. The watch will continue internal timekeeping for approximately 1 week. If the battery is charged during this period, the hands will automatically adjust to display the current time, and the watch will resume normal operation. If the battery is not charged, all watch settings (including current time) will be reset; after charging, the watch settings will return to their factory defaults.

Battery Recharge Recovery

Frequent use of sound alarms in a short period may cause the watch to enter an energy recovery mode. The watch will remain in this mode until the rechargeable battery's charge is restored, during which all watch functions will be inactive. The watch requires approximately 15 minutes to recover its rechargeable battery charge. After recovery, the hands will adjust to the correct positions, and normal watch functions will resume. Place the watch in a well-lit area for faster battery recharge recovery.

* Daily charging time required for normal watch operation.
** Time required to restore the rechargeable battery's charge.

The times indicated above are for reference. Charging time depends on lighting conditions.

Energy Saving Mode

When the energy saving function is enabled, it automatically activates when the watch remains stationary for a long time. The table below shows how watch functions are affected by the energy saving mode.

• There are two energy saving modes: screen sleep and watch sleep.
• 60-70 minutes of inactivity: Second hand [2] stops at the 12 o'clock position. All functions are ON.
• 6-7 days of inactivity (full energy saving mode): All functions, including current time display, are OFF. Internal timekeeping continues.

The watch does not enter energy saving mode between 6:00 and 21:59. However, if the watch is already in energy saving mode at 6:00, it will remain in that mode. The watch does not enter energy saving mode during stopwatch or countdown timer operation.

Exiting Energy Saving Mode

To exit energy saving mode, place the watch in a well-lit area, press any button, or turn the watch towards you.

Radio-Controlled Time Calibration

The watch receives radio calibration signals to update the time. If signal reception is not possible for any reason, time can be set manually (refer to "Setting Current Time and Date Manually"). This section provides information on performing radio calibration if the Home City Code is set for Japan, North America, Europe, China, or other supported regions.

Caution: Some areas of HNL (Honolulu) and ANC (Anchorage) are far from signal transmission stations, which may result in poor signal reception. If HNL or ANC is set as the Home City Code, only the date and time will be adjusted after receiving the radio calibration signal. Standard/Daylight Saving Time must be set manually for these city codes.

Approximate Reception Range

Even if the watch is within the transmitter's range, reception may be reduced or impossible if the signal is blocked by mountains, tall buildings, adverse weather conditions, or radio interference. Signal strength also decreases at distances over 500 km from the transmitter. Reception may be impossible at distances beyond those specified below, or at certain times of the year or day. Radio interference can also cause reception problems.

• Mainflingen (Germany) or Anthorn (UK): 500 km (310 miles)
• Fort Collins (USA): 1000 km (600 miles)
• Fukushima or Fukuoka/Saga (Japan): 500 km (310 miles)
• Shangqiu (China): 1500 km (910 miles)

As of December 2014, China does not observe Daylight Saving Time (DST). If China adopts DST in the future, some functions of this watch may not work correctly.

Receiving Radio Calibration Signal

1. Ensure the watch is in Current Time mode. If not, hold [Button C] for approximately 2 seconds to enter Current Time mode.

2. The antenna is located on the 12 o'clock side of the watch. Position the watch with the 12 o'clock side facing a window, as shown in the figure. Ensure there are no metal objects nearby.

3. Initiate radio calibration signal reception either automatically or manually.

• For automatic reception, leave the watch in the set position overnight. Refer to "Automatic Radio Calibration Signal Reception".
• For manual reception, follow the steps in "Manual Radio Calibration Signal Reception".

Automatic Radio Calibration Signal Reception: The watch receives the signal up to 6 times a day (5 times in China) between 1:00 and 5:00. If a signal is received successfully, subsequent attempts for that day will not be made. Automatic reception occurs in Current Time mode. Reception will not occur when the watch is in a setting mode.

Manual Radio Calibration Signal Reception

1. In Current Time mode, hold [Button A] for approximately 2 seconds until the second hand [2] performs the following actions: First, the second hand [2] points to the last reception result indicator (Y for YES or N for NO), then it points to the READY (R) indicator.

2. The second hand [2] indicates the operation currently being performed:

• R (READY): Watch is ready to receive radio calibration signal.
• W (WORK): Receiving radio calibration signal.
• Y (YES): Radio calibration signal received successfully.
• N (NO): Radio calibration signal not received for some reason.

The second hand [2] may move between W (WORK) and R (READY) if signal reception is unstable.

3. After signal reception is complete, the second hand [2] will point to the Y (YES) or N (NO) indicator for 5 seconds. Press [Button A] to return to Current Time mode. After successful reception, the watch automatically corrects the current time. If the signal was not received, time correction will not occur.

To interrupt signal reception and return to Current Time mode, press any button.

Checking the Result of the Last Radio Calibration Signal Reception

In Current Time mode, press [Button A]. The second hand [2] will point to the Y (YES) indicator for 5 seconds if the signal was received successfully, or to the N (NO) indicator if reception failed, then it will return to displaying the current time. If you need to return to displaying the current time while the second hand [2] is pointing to Y (YES) or N (NO), press [Button A].

The second hand [2] will point to N (No) if the current time or date settings were changed manually after the last successful radio calibration signal reception.

Radio Calibration Precautions

• Strong electrostatic discharge can lead to incorrect time settings.
• Even after successful signal reception and current time correction, the watch may gain or lose up to 1 second under certain conditions.
• The watch automatically updates the date and day of the week from January 1, 2000, to December 31, 2099. Date updates via radio calibration will cease on January 1, 2100.
• In regions where reception is impossible, the watch will operate with the accuracy specified in the technical specifications.
• Radio calibration signal reception will not occur if:
• The rechargeable battery charge level is 2 or lower.
• The watch is in energy saving mode.

Mode Selection

The watch has 5 main modes. Select the mode based on your needs.

• To perform the following actions: Go to the mode:
• View current and world time (in one of 29 cities)
• View current date
• Set Home City Code and Daylight Saving Time (DST)
• Receive radio calibration signal
• Set current time and date manually
• Measure elapsed time using the stopwatch
• Countdown timer
• View current time in one of 29 cities
• Set alarm time
• Current Time Mode
• Stopwatch Mode
• Countdown Timer Mode
• World Time Mode
• Alarm Mode

Returning to Current Time Mode from another mode: Hold [Button C] for approximately 2 seconds until a double beep is heard.

How to Select a Mode

Use [Button C] to select the desired mode in the sequence shown in the figure. The left dial hand [4] points to the indicator corresponding to the selected mode.

• Current Time Mode: Hand points to day of week indicator (SU, MO, TU, WE, TH, FR, SA).
• Stopwatch Mode: Hand is at the 12 o'clock position.
• Alarm Mode: Hand points to AL indicator.
• Countdown Timer Mode: Hand points to TR indicator.
• World Time Mode: Hand points to STD or DST indicator.

Current Time Mode

In Current Time mode, you can view the current time and date. To return to Current Time mode from other modes, hold [Button C] for approximately 2 seconds.

Hands and Indicators:

• [1] Hour Hand
• [2] Second Hand
• [3] Minute Hand
• [4] Left Dial Hand: Indicates day of the week.
• [5] Lower Dial Hand: Indicates Home City hour in 24-hour format.
• [6] Right Dial Hands: Indicate current World Time in 24-hour format.
• [7] Date Indicator

Setting Home City Code

When setting the Home City Code, two parameters must be set: the Home City Code and Standard/Daylight Saving Time (DST).

Setting Home City Code:

There is no city code for Newfoundland in this watch.

1. In Current Time mode, hold [Button A] for approximately 5 seconds until the second hand [2] performs the following actions: First, the second hand [2] points to the last reception result indicator (YES or Y, or NO or N), then it points to the READY (R) indicator, and then to the indicator of the current Home City Code.

• This indicates the watch is in setting mode.
• If no operation is performed for 2-3 minutes, the watch will automatically exit setting mode.
• For more information on city codes, refer to the "City Code Table" section.

2. To select the Home City Code, press [Button D] to move the second hand [2] clockwise. Hold [Button D] until the second hand [2] points to the desired Home City Code indicator. After selecting the Home City Code, the hour [1] and minute [3] hands, the lower dial hand [5], and the date indicator [7] will display the current time and date for the selected city. Do not proceed to the next step until the hands stop moving.

3. Press [Button B] to switch between Standard (STD) or Daylight Saving Time (DST) for the selected city. After selecting the Home City Code, the left dial hand [4] will point to the indicator of the current STD or DST setting. Note that the STD/DST setting cannot be changed for the UTC city code.

4. After making the necessary settings, press [Button A] to return to Current Time mode.

Setting Summer Time:

1. Perform the steps indicated in step 1 of the "Setting Home City Code" section. After selecting the Home City Code, the hour [1] and minute [3] hands, the lower dial hand [5], and the date indicator [7] will display the current time and date for the selected city. Do not proceed to the next step until the hands stop moving.

2. Press [Button B] to switch between Standard (STD) or Daylight Saving Time (DST) for the selected city. After selecting the Home City Code, the left dial hand [4] will point to the indicator of the current STD or DST setting. Note that the STD/DST setting cannot be changed for the UTC city code.

3. After making the necessary settings, press [Button A] to return to Current Time mode.

After selecting a city code in Current Time mode, world time will be automatically calculated as an offset from UTC*. For information on radio calibration signal reception, refer to the "Radio-Controlled Time Calibration" section.

* UTC is Coordinated Universal Time – a global scientific standard for time measurement. Greenwich, England is the reference point for UTC.

Setting Current Time and Date Manually

You can set the current date and time manually when radio calibration signals cannot be received.

Setting Current Time Manually:

1. In Current Time mode, hold [Button A] for approximately 5 seconds until the second hand [2] performs the following actions: First, the second hand [2] points to the last reception result indicator (YES or Y, or NO or N), then it points to the READY (R) indicator, and then to the indicator of the current Home City Code. The left dial hand [4] will point to the indicator of the current Standard (STD) or Daylight Saving Time (DST) setting.

2. If necessary, change the Home City Code and Standard/Daylight Saving Time (DST) settings. For more information, refer to the "Setting Home City Code" section. Use [Button C] to select the desired parameter in the following sequence: Home City Code/DST -> Hour/Minute -> Year -> Day -> Month.

3. Press [Button C]. A beep will sound, and the second hand [2] and the left dial hand [4] will move to the 12 o'clock position. This indicates the watch is in current time setting mode.

4. Use [Button D] (+) and [Button B] (-) to set the current time (hours and minutes). Each press of a button will shift the hour [1] and minute [3] hands by 1 minute. To fast-forward the hour [1] and minute [3] hands, hold down [Button D] (+) or [Button B] (-). Press any button to stop the fast-forward movement. The lower dial hand [5] and the hour hand [1] move synchronously. Pay attention to the AM/PM indication on the lower dial hand [5] during current time setting. To proceed to setting the current date, press [Button C] and follow the steps starting from step 3 in the "Setting Current Date Manually" section.

5. After making the necessary settings, press [Button A] to return to Current Time mode. The second hand [2] will resume movement from the 12 o'clock position.

Setting Current Date Manually:

1. In Current Time mode, hold [Button A] for approximately 5 seconds until the second hand [2] performs the following actions: First, the second hand [2] points to the last reception result indicator (YES or Y, or NO or N), then it points to the READY (R) indicator, and then to the indicator of the current Home City Code.

2. Press [Button C] twice. A beep will sound, indicating the watch is in current year setting mode. The year can be set between 2000 and 2099.

3. Use [Button D] and [Button B] to set the year. Each press of [Button B] shifts the left dial hand [4] by one value (tens digit setting). Each press of [Button D] shifts the second hand [2] by one value (units digit setting).

4. After setting the year, press [Button C]. A beep will sound, indicating the watch is in current month setting mode.

5. Use [Button D] to set the month. Each press of [Button D] shifts the second hand [2] by one value.

6. After setting the month, press [Button C]. A beep will sound, indicating the watch is in day setting mode.

7. Use [Button D] (+) and [Button B] (-) to set the day. Each press of a button shifts the date indicator [7] by one value. To proceed to setting the current time, press [Button C] and follow the steps starting from step 3 in the "Setting Current Time Manually" section.

8. After making the necessary settings, press [Button A] to return to Current Time mode. The second hand [2] will resume movement from the 12 o'clock position. The left dial hand [4] will point to the day of the week indicator, which is automatically calculated after setting the current date (year, month, day).

The watch has a fully automatic calendar that accounts for leap years. Once the date is set, there should be no need to adjust it, except in cases of battery replacement or if the battery charge drops to Level 3.

Stopwatch Mode

In Stopwatch mode, you can measure elapsed time and split times.

Hands and Indicators:

• [2] Second Hand: Indicates seconds of elapsed time.
• [4] Left Dial Hand: Indicates 1/20-second elapsed time measurement. The 1/20-second hand starts from the 12 o'clock position.
• [6] Right Dial Hands: Indicate hours and minutes of elapsed time.

Measuring Elapsed Time:

1. Use [Button C] to move the left dial hand [4] to the stopwatch indicator.

2. You can now start measuring elapsed time.

• Start/Stop: [Button B]
• Split/Reset: [Button D]

The measurement limit for elapsed time is 23 hours, 59 minutes, 59.95 seconds.

Countdown Timer Mode

In Countdown Timer mode, you can set the countdown time. An alarm will sound when the countdown is finished.

Hands and Indicators:

• [2] Second Hand: Indicates countdown seconds. During countdown, it moves counter-clockwise. After the countdown ends, it automatically switches to clockwise movement, indicating seconds elapsed since the countdown finished.
• [4] Left Dial Hand: Points to the TR indicator.
• [6] Right Dial Hands: Indicate countdown hours and minutes. During countdown, they move counter-clockwise. After the countdown ends, they automatically switch to clockwise movement, indicating minutes and hours elapsed since the countdown finished.

Setting Countdown Time:

1. Use [Button C] to move the left dial hand [4] to the TR indicator.

2. Ensure the second hand [2] is not moving (i.e., countdown is not in progress). Press [Button D]. If the second hand [2] is moving, press [Button B] to stop the countdown, then press [Button D].

3. Use [Button D] (+) and [Button A] (-) to set the countdown time. Each press of a button will shift the right dial hands [6] by 1 minute. To fast-forward the right dial hands [6], hold down [Button D] or [Button A]. Press any button to stop the fast-forward movement. The maximum countdown time is 24 hours. To set this, move the right dial hands [6] to the 24-hour mark.

Countdown Operation:

• Before starting the countdown timer, ensure the previous countdown has finished (second hand [2] is not moving). To finish a previous countdown, press [Button B] to stop it, then press [Button D] to reset the timer to its set value.
• An alarm will sound for 10 seconds after the countdown finishes. The alarm will sound even if the watch is not in Countdown Timer mode.
• During countdown, the second hand [2] and the right dial hands [6] move counter-clockwise. After the countdown ends, the second hand [2] and the right dial hands [6] automatically start moving clockwise, displaying the time elapsed since the countdown finished. To stop the display of elapsed time, press [Button B].
• The maximum display for elapsed time is 23 hours, 59 minutes, 59 seconds.

Stopping the Sound Alarm: Press any button.

World Time Mode

In World Time mode, you can view the current time in one of 29 city codes (time zones). The city code set in World Time mode is called the World Time City Code.

Hands and Indicators:

• [2] Second Hand: Points to the selected World Time city code indicator.
• [4] Left Dial Hand: Points to the STD (Standard Time) or DST (Daylight Saving Time) indicator for the selected World Time city.
• [6] Right Dial Hands: Indicate the current time for the selected city code in 24-hour format.

Viewing Time for a World Time City:

1. Use [Button C] to move the left dial hand [4] to the STD or DST indicator. The second hand [2] will point to the currently set World Time city code.

2. Use [Button D] to move the second hand [2] to the indicator of the desired World Time city code. The right dial hands [6] will adjust to display the current time for the selected city code. The hour [1] and minute [3] hands will display the current time of the Home City Code. For more information on city codes, refer to the "City Code Table" section. If you believe the time for the selected World Time city code is displayed incorrectly, check the time settings for the Home City Code. For more information on setting current time, refer to "Setting Current Time Manually".

Setting Summer Time for a World Time City:

1. In World Time mode, use [Button D] to select the city code for which you want to change the summer time setting. The right dial hands [6] will adjust to display the current time for the selected World Time city code. Do not proceed to the next step until the hands stop moving.

2. Hold [Button A] for approximately 2 seconds until a beep sounds. This action will toggle the STD (Standard) and DST (Daylight Saving) time setting. Note that the STD/DST setting cannot be changed for the UTC city code. Note that the STD/DST setting change applies only to the selected World Time city; it does not affect other city codes.

Quick Swap of Home City Code with World Time City Code:

Perform the following actions to quickly swap your Home City Code with a World Time City Code. This function is useful when traveling and frequently changing time zones. The example shows how the Home City Code is swapped with a World Time City Code. Home City Code: Tokyo (TYO), World Time City Code: New York (NYC).

• Before Swap: Home City: Tokyo (TYO) 10:08 p.m. (Standard Time); World Time: New York (NYC) 9:08 a.m. (Daylight Saving Time).
• After Swap: Home City: New York (NYC) 9:08 a.m. (Daylight Saving Time); World Time: Tokyo (TYO) 10:08 p.m. (Standard Time).

1. In World Time mode, use [Button D] to select the desired city code. For this example, move the second hand [2] to the New York (NYC) indicator. Wait for the right dial hands [6] to stop moving. Do not proceed to the next step while the hands are moving.

2. Hold [Button B] for approximately 3 seconds until a beep sounds. This action will make New York (NYC) the Home City Code, and the World Time City Code will change to Tokyo (TYO). After the swap, the watch will remain in World Time mode. The second hand [2] will move to display the indicator of the new World Time City Code – TYO in this example. The right dial hands [6] will adjust to display the current time of the new World Time City Code.

If the new Home City Code supports radio calibration signal reception, it will be automatically enabled.

Alarm Mode

When the alarm is enabled, a sound alarm sounds daily for 10 seconds when the current time matches the set time. The alarm sounds even if the watch is not in Current Time mode.

Hands and Indicators:

• [2] Second Hand: Points to the alarm status indicator (ON/OFF).
• [4] Left Dial Hand: Points to the AL indicator.
• [6] Right Dial Hands: Indicate the alarm time in 24-hour format.

Setting the Alarm Time:

1. Use [Button C] to move the left dial hand [4] to the AL indicator.

2. Use [Button D] (+) and [Button B] (-) to set the alarm time. Each press of a button will shift the right dial hands [6] by 1 minute. To fast-forward the hands, hold down [Button D] (+) or [Button B] (-). Press any button to stop the fast-forward movement. The alarm sound always occurs according to the current time. The watch will automatically return to Current Time mode if no operations are performed in Alarm mode for 2-3 minutes.

Turning the Alarm On/Off:

In Alarm mode, press [Button A] to turn the alarm on or off. The second hand [2] will point to the alarm status indicator (ON or OFF).

Stopping the Sound Alarm:

Press any button.

Automatic Analog Time Correction

Strong magnetic fields or shocks can cause the watch to display incorrect time and/or date, even after receiving a radio calibration signal. The automatic analog time correction function is designed to automatically correct the home position of the watch hands.

• Automatic analog time correction is performed only in Current Time mode.
• During automatic analog time correction, the hour [1], minute [3], and second [2] hands are corrected. Correction of dial hands and the date indicator must be performed manually (refer to "Manual Analog Time Correction").
• Automatic analog time correction is performed every hour between 55 minutes of the previous hour and 5 minutes of the next hour.
• Automatic analog time correction can be started manually. Refer to "Manual Start of Automatic Analog Time Correction".
• Automatic analog time correction takes approximately 3.5 minutes.
• If the time displayed by the watch hands differs from the current time by 1 hour or more, perform the actions described in "Manual Start of Automatic Analog Time Correction" and "Manual Analog Time Correction".

Manual Start of Automatic Analog Time Correction

Perform the actions in this section only when the watch is not in current time setting mode.

In Current Time mode, hold [Button D] for approximately 6 seconds until the second hand [2] completes a full rotation. Hold [Button D] until the second hand [2] completes a full rotation. To stop the analog time correction and return to Current Time mode, press [Button D] again. If [Button D] is released while the second hand [2] is pausing during its full rotation (approximately 3 seconds before completion), the watch hands will reset to the home position as described in "Manual Analog Time Correction". If this occurs, press [Button A] to return to Current Time mode, then repeat the above steps to start automatic analog time correction.

During automatic analog time correction, the hands should perform the following actions:

1. The hands will begin to move automatically to determine their home position.
2. After determining the home position, the hands will return to display the current time. This indicates that automatic analog time correction is complete.

Manual Analog Time Correction

Strong magnetic fields or shocks can cause the watch to display incorrect time and/or date, even after receiving a radio calibration signal. If this happens, perform the actions described in this section to correct the analog time and date.

• Do not perform analog time correction if the watch is showing the correct time and date.
• The home position of the hour [1], minute [3], and second [2] hands can be corrected automatically. Refer to "Automatic Analog Time Correction" for more information.

After performing step 1 of this section, you can return to Current Time mode at any time by pressing [Button A]. The watch will automatically return to Current Time mode if no operations are performed for 2-3 minutes during analog time correction. All changes made before returning to Current Time mode will be saved.

1. Hold [Button C] for approximately 2 seconds until a double beep sounds and the watch enters Current Time mode.

2. Hold [Button D] for approximately 3 seconds until a beep sounds. This indicates the watch has entered analog correction mode. The watch will automatically exit analog correction mode if no operations are performed for 2-3 minutes. First, correct the second hand [2]. If the home position of the second hand [2] is not the 12 o'clock position, use [Button D] to move the second hand [2] to the 12 o'clock position. Press [Button C] to proceed to setting the next parameter in the following sequence: Second Hand [2] -> Hour [1] / Minute [3] / 24-Hour [5] Hands -> Right Dial Hands [6] -> Left Dial Hand [4] -> Date Indicator [7].

3. After correcting the home position of the second hand [2], press [Button C] to proceed to correcting the home position of the hour [1] and minute [3] hands. The home position for the hour [1] and minute [3] hands is the 12 o'clock position. The lower dial hand [5] moves synchronously with the hour hand [1]; separate correction is not needed for it. If the hour [1] and minute [3] hands do not move to the home position, use [Button D] (+) and [Button B] (-) to move them to the 12 o'clock position. Press [Button C] to proceed.

4. After correcting the home position of the hour [1] and minute [3] hands, press [Button C] to proceed to correcting the home position of the right dial hands [6]. The home position for the right dial hands [6] is the 12 o'clock position. If they do not move to the home position, use [Button D] (+) and [Button B] (-) to move them to the 12 o'clock position. Press [Button C] to proceed.

5. After correcting the home position of the right dial hands [6], press [Button C] to proceed to correcting the home position of the left dial hand [4]. The home position for the left dial hand [4] is the 12 o'clock position. If it does not move to the home position, use [Button D] (+) and [Button B] (-) to move it to the 12 o'clock position. Press [Button C] to proceed.

6. After correcting the home position of the left dial hand [4], press [Button C] to proceed to correcting the home position of the date indicator [7]. The home position for the date indicator [7] is '1'. If this value is not displayed, use [Button D] (+) or [Button B] (-) to set it to 1.

7. Press [Button A] to return to Current Time mode. The date indicator [7] will display the current date, and then the hour [1] and minute [3] hands will move to display the current time. Wait for the hands to stop moving before performing any other actions.

Troubleshooting

Hand Position and Movement:

• Cannot understand current mode: Refer to "Mode Selection". To return to Current Time mode from any mode, hold [Button C] for approximately 2 seconds.
• Second hand moves in 2-second intervals / All hands at 12 o'clock, buttons unresponsive: Low battery. Place the watch in a well-lit area to recharge the battery until the second hand [2] moves smoothly at 1-second intervals.
• Watch hands move fast when I am not performing any operations: This may be due to one of the following reasons. Fast hand movement does not indicate a malfunction:
  • The watch is exiting energy saving mode (refer to "Energy Saving Mode").
  • Time is being corrected after a successful radio calibration signal reception.
  • The watch is automatically returning to Current Time mode from Alarm mode.
• Watch hands suddenly stopped, buttons unresponsive: The watch may be in battery recharge recovery mode. Do not perform any operations for approximately 15 minutes until the hands resume normal movement. The hands should return to displaying the current time and resume normal movement. Place the watch in a well-lit area for faster battery recharge recovery.
• Incorrect hour display: Check the Home City Code setting. Change this setting if necessary.
• Watch gains or loses an hour: If you are in a location where radio calibration signals cannot be received, you must set the current time manually. If you are using the watch in a location that does not support radio calibration signal reception, you must manually set the Standard (STD) / Daylight Saving (DST) time.
• Watch shows incorrect time and/or date: The watch may have been exposed to strong magnetic fields or shocks. You must perform the analog time correction procedure.

World Time:

• Incorrect World Time display (right dial hands [6] in World Time mode): The Home City Code and/or Standard (STD) / Daylight Saving (DST) time setting is incorrect. Correct the Home City Code and/or Standard (STD) / Daylight Saving (DST) time.
• World Time right dial hands [6] display time with a 1-hour difference: The Standard/Daylight Saving Time setting for the selected World Time city code is incorrect. Check the Standard/Daylight Saving Time setting for the selected World Time city code.

Charging:

• Watch does not resume operation after being placed in light: This can happen when the rechargeable battery charge level drops to Level 3. Continue to expose the watch to light to charge the battery until the second hand [2] resumes smooth movement (at 1-second intervals).
• Second hand [2] initially moved at 1-second intervals, then started moving at 2-second intervals: The watch is not yet sufficiently charged. Place the watch in light for further battery charging.

Radio Calibration Signal:

• Second hand [2] is in the N (No) position when I check the result of the last radio calibration signal reception:
• Possible Causes: You moved the watch or performed an operation during signal reception. The watch is in a location with poor signal reception conditions.
• Solution: Ensure the watch is in a location accessible for signal reception, do not perform any operations or move the watch during reception. You are in an area where reception is impossible. Refer to "Approximate Reception Range".
• Possible Causes: Signal is not transmitted for some reason. The manually set current time has changed.
• Solution: Check the website of the signal transmission organization for information on possible equipment malfunctions. Try receiving the signal again later. Check the Home City Code, Daylight Saving Time (DST), and automatic radio calibration signal reception settings.
• Time is off by 1 hour: The radio calibration signal was not received for some reason on the day DST was supposed to change. Place the watch in a position where it can receive the radio calibration signal. Time will be automatically set after the watch successfully receives the signal. If radio calibration signal reception is impossible, manually set the Standard/Daylight Saving time.
• Automatic radio calibration signal reception is impossible, or I cannot manually receive the radio calibration signal:
• Possible Causes: The watch is in Stopwatch or Countdown Timer mode. The Home City Code is set incorrectly. A countdown is in progress. The rechargeable battery charge level is low.
• Solution: The watch does not receive radio calibration signals automatically if it is in Stopwatch or Countdown Timer mode. Hold [Button C] for approximately 2 seconds to enter Current Time mode. Check the Home City Code and adjust if necessary. The watch does not receive radio calibration signals automatically or manually when a countdown is in progress. Go to Countdown Timer mode, stop the countdown, and return to Current Time mode. Place the watch in light to charge the rechargeable battery.

Technical Specifications

• Accuracy: ±15 seconds per month (without radio calibration).
• Current Time: Hour, minute (hands move every 10 sec), second, 24-hour display, date, day of week.
• Calendar System: Fully automatic calendar programmed from 2000 to 2099.
• Other: Home City Code setting (choice of 29 city codes + UTC); Daylight Saving / Standard Time.
• Radio Calibration Signal Reception: Automatic reception 6 times a day (5 times in China); after successful reception, subsequent automatic reception attempts for that day are not made; manual reception.
• Radio Calibration Signal Transmitting Stations: Mainflingen, Germany (Call sign: DCF77, Frequency: 77.5 kHz); Anthorn, UK (Call sign: MSF, Frequency: 60.0 kHz); Fort Collins, Colorado, USA (Call sign: WWVB, Frequency: 60.0 kHz); Fukushima, Japan (Call sign: JJY, Frequency: 40.0 kHz), Fukuoka/Saga, Japan (Call sign: JJY, Frequency: 60.0 kHz); Shangqiu, Henan Province, China (Call sign: BPC, Frequency: 68.5 kHz).
• Stopwatch:
• Unit of measurement: 1/20 second.
• Measurement limits: 23:59'59.95''.
• Measurement modes: Elapsed time, split time.
• Countdown Timer:
• Unit of measurement: 1 second.
• Countdown setting: 1 minute to 24 hours (1 minute increments).
• Other: Elapsed time after countdown (1 second accuracy).
• World Time: 29 cities (29 time zones) + UTC.
• Other: Daylight Saving / Standard Time; quick swap of World Time City Code with Home City Code.
• Alarm: Daily alarm.
• Other: Energy saving mode; low battery warning; automatic correction of hand home positions.
• Power: Solar cell and one rechargeable battery.
• Approximate Battery Life: 5 months (without solar charging, from full charge under conditions: 10 sec alarm/day, 18 hrs display/day (6 hrs sleep), approx. 4 min radio reception/day).

City Code Table

Data is as of December 2010. World time rules (UTC/GMT offsets) and Daylight Saving Time rules depend on the country. Due to Russian Federation decrees in June 2011 and July 2014, time zones and DST observance have changed. Please consider this information when setting your watch.

Product Information

Product Name: Electronic / Electro-mechanical Quartz Wristwatch (Men's/Women's)

Brand: CASIO

Manufacturer: CASIO COMPUTER Co.,Ltd.

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

Importer: OOO "Casio", 127015, Russia, Moscow, Butyrskaya St., bld. 77

Warranty Period: 1 year

Authorized Service Center Address for Claims: As indicated on the warranty card.