Casio WV-57 User Manual

Important Information

Battery

If you notice signs of low power (faint display or no backlight), replace the battery at an authorized CASIO dealer or distributor. The battery included with your watch is a test battery installed by the manufacturer, so its service life may be shorter than standard batteries.

Water Resistance

Your watch is classified according to its water resistance rating (from I to V). Refer to the table below to determine the appropriate usage for your watch.

Notes for respective ratings:

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

ATTENTION!!! For all types of watches, do not:

• Press buttons underwater.
• Operate the crown underwater.
• Unscrew the crown underwater.

Care for Your Watch

IMPORTANT!!!

• Some water-resistant watches have leather straps. Do not wear these watches while swimming or engaging in any other activity that involves immersion in water, as the strap may be damaged.
• 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 dealer or CASIO distributor.
• Do not expose the watch to excessively high or low temperatures.
• While 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 solution of water and a neutral detergent. Never use volatile agents (e.g., gasoline, thinners, spray cleaners, etc.).
• When not using your watch, store it in a dry place.
• Avoid contact with gasoline, cleaning solvents, aerosol sprays, adhesives, paints, etc. Chemical reactions caused by these materials can damage gaskets, the case, and the watch's finish.
• Some watch straps feature silk-screened designs. Be careful when cleaning such straps to avoid damaging the designs.

For watches with resin bands...

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

For watches with fluorescent cases and bands...

• Prolonged exposure to direct sunlight can cause the fluorescent coating to gradually fade.
• Prolonged contact with moisture can cause the fluorescent coating to gradually fade. If any moisture gets on the watch surface, wipe it off as soon as possible.
• Prolonged contact with a wet surface can lead to discoloration of the fluorescent coating. Ensure the fluorescent surface is dry and avoid contact with other surfaces.
• Rubbing a surface with fluorescent paint vigorously against another surface can transfer the fluorescent paint to that surface.

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

Overview of Operating Modes

The illustration shows a general view of the watch in the Current Time Mode. Pressing button "C" cycles through the modes in the following sequence:

Current Time Mode → World Time Mode → Alarm Mode → Date Reminder Mode → Time Memory Mode → Stopwatch Mode → Current Time Mode.

In any mode, press button "B" to turn on the display backlight.

[Illustration Description: The watch face is shown with mode indicators. Button 'A' is typically for setting/confirming, 'B' for backlight, 'C' for mode change, and 'D' for adjustments or scrolling.]

Current Time Mode

This watch automatically corrects the time based on calibration signals. However, you can also set the time manually. Before using the watch, set your time zone.

Setting the Time Zone:

1. In the Current Time Mode, press and hold button "A" until the signal transmission indicator (A/T, MSF, DCF) appears, indicating the start of settings. If the "A/T" indicator does not appear, press button "D".
2. Press button "C" to set the city code.
3. Use buttons "B" and "D" to change the city code for your current location.
4. When settings are complete, press button "A".

In the Current Time Mode, press button "D" to switch between the display of Current Time/Date and the time/date of the last reception.

Calibration Signal

This watch receives calibration signals to update the time. Transmission centers are located in Germany (25 km from Frankfurt) and Rugby, England. The signal has a range of 1000 km. Signals may be weak beyond 500 km. The transmitted signal is also affected by natural conditions, atmospheric pressure, and temperature. Signal weakening can be caused by:

• Being near a TV, computer, or home appliance.
• Being in a subway or tunnel.
• Being near an airport, train station, or busy highway.
• Being near radio or signal transmission stations.
• Electrostatic voltage.

There are two types of calibration signal reception: Auto Calibration and Manual Calibration. With Auto Calibration enabled, the watch automatically receives the signal five times daily to adjust the time. With Manual Calibration enabled, you press a button to receive the signal:

1. Place your watch horizontally.
2. In the Current Time Mode, press and hold button "D" for 2 seconds until a short beep and the "RC!" indicator appear. This indicates the start of signal reception.
3. Signal reception takes 2 to 5 minutes. Do not move your watch during reception.
4. To stop the reception process and return to Current Time Mode, press button "D".

If the signal reception fails for any reason, the "ERR" indicator will appear. If the signal reception indicator does not appear, it means signal reception is turned off. You need to turn it on.

Auto Calibration Signal

When Auto Calibration is enabled, the watch automatically receives the signal daily at 0:00, 1:00, 2:00, 3:00, 4:00. The watch will attempt an additional reception at 5:00 if previous receptions were unsuccessful.

Enabling the Calibration Signal

1. In the Current Time Mode, press and hold button "A" until the signal reception indicator flashes.
2. Press button "C" three times to switch between enabling/disabling signal reception.
3. Press button "D" to enable ("ON") or disable ("OF") the calibration signal reception.
4. When settings are complete, press button "A".

Signal Reception Indicator

This indicator shows the strength of signal reception. The indicator will be fully displayed when the watch is positioned for successful signal reception. Try to position your watch for optimal 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 displayed in all watch modes. If the calibration indicator is not displayed, signal reception is not occurring. Perform manual calibration or check your watch settings.

Setting Current Time and Date

1. In the Current Time Mode, press and hold button "A" until the signal reception indicator flashes, indicating the start of settings.
2. Press button "C" to cycle through settings: Signal Reception Indicator → DST (Daylight Saving Time) → Auto Signal Reception → 12/24 Hour Format → Seconds → Hours → Minutes → Year → Month → Day → Signal Reception Indicator.
3. If you select seconds (seconds flash), 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 the minutes will increment by 1. If seconds are between 00 and 29, the minutes will not change.
4. To change minutes, etc., use button "D" to increase and button "B" to decrease.
5. Press button "D" to switch between 12-hour and 24-hour formats. In the 12-hour format, "P" indicates PM; in the 24-hour format, "24" is displayed.
6. Use buttons "B" and "D" to select the city code.
7. For signal reception settings ("A/T" (Auto), "MSF" (UK, for module 2555), "DCF" (Germany, for module 2868)), use button "D".
8. To switch between Daylight Saving Time ("ON") and Standard Time ("OF"), or Auto Daylight Saving Time ("A"), use button "D".
9. Press button "D" to enable ("ON") or disable ("OF") auto signal reception. Holding down a button allows faster adjustment.
10. The day of the week is set automatically according to the date. You can set the year between 2000 and 2040.
11. After setting the date and time, press button "A" to return to the Current Time Mode. If you do not press any buttons for a while, the watch will automatically return to the Current Time Mode.

Daylight Saving Time (DST)

This watch automatically adjusts for Daylight Saving Time based on the received signal. However, if you are in a region where DST is not supported or in a different time zone, you may need to set it manually:

1. In the Current Time Mode, press and hold button "A" for several seconds until the signal reception indicator appears.
2. Press button "C" twice to access the DST settings.
3. Use button "D" to cycle through the settings: Auto DST ("A") – DST Off ("OF") – DST On ("ON"). The "DST" indicator appears on the display when DST is active.
4. When settings are complete, press button "A".

Daylight Saving Time for World Time

1. In the Current Time Mode, press and hold button "A" for several seconds until the signal reception indicator appears.
2. Press button "C" to display city codes.
3. Use buttons "B" and "D" to select the city code for which you want to adjust DST.
4. Press button "C" again to start the settings.
5. Press button "D" to enable or disable DST.

If you select city codes such as BER (Berlin), PAR (Paris), LON (London), ATH (Athens), the watch will automatically adjust for DST.

Backlight

• Press button "B" in any mode to turn on the backlight.
• The backlight uses electro-luminescent (EL) elements, whose power decreases after prolonged use.
• The watch emits an audible sound when the display is illuminated. This is due to the vibration of the backlight elements and does not indicate a malfunction.
• The backlight is difficult to see in direct sunlight. Frequent use of the backlight reduces battery life.

World Time Mode

In this mode, you can view the local time in any of the 30 cities worldwide (29 time zones).

Viewing Time in Another Time Zone

In the World Time Mode, press buttons "D" and "A" to select the city for which you want to view the time.

Alarm Mode

You can set various daily alarms. The alarm will sound for 10 seconds at the set time. If the hourly chime is enabled, a short beep will sound at the top of each hour. If the snooze alarm is enabled, the alarm will sound seven times every five minutes until you turn it off. If the countdown alarm is enabled, the watch will display the remaining time until the alarm sounds.

Setting an Alarm

1. In the Alarm Mode, press button "D" to select the alarm type: AL1 → AL2 → AL3 → TAL (Countdown Alarm) → SNZ (Snooze Alarm) → SIG (Hourly Chime).
2. After selecting the alarm type, press and hold button "A". The hour digits will flash, indicating they are selected for setting. The alarm is automatically enabled at this point.
3. Press button "C" to cycle through settings: Hours → Minutes → Enable/Disable → Hours.
4. Use button "D" to increase and button "B" to decrease the selected value. Holding down a button allows faster adjustment.
5. Press button "D" to enable or disable the alarm. The 12/24 hour format matches the setting in the Current Time Mode. When using the 12-hour format, be careful to set AM or PM correctly.
6. When settings are complete, press button "A" to return to the Alarm Mode.

Testing an Alarm Sound

In the Alarm Mode, press button "D" to test the alarm sound.

Enabling/Disabling Alarms

• In the Alarm Mode, press button "D" to select the alarm type.
• After selecting the alarm type, press and hold button "A" until the hour indicator flashes.
• Press button "D" to enable or disable the selected alarm type. The "ALM" indicator appears on the display when any of the four alarms are set. The "SNZ" indicator appears when the snooze alarm is set.

Enabling/Disabling Hourly Chime

1. In the Alarm Mode, press button "D" to select the hourly chime ("SIG").
2. Press and hold button "A" until the hour indicator flashes.
3. Press button "D" to enable or disable the hourly chime. The "SIG" indicator appears on the display when the hourly chime is enabled.

Date Reminder Mode

In the Date Reminder Mode, you can set any date, and an indicator "!" will flash when that date is reached. You can set up to five dates for reminders.

Setting a Date

1. In the Date Reminder Mode, press button "D" to select the date: DA1 → DA2 → DA3 → DA4 → DA5 → DA1.
2. Press and hold button "A" until the month indicator flashes, indicating the start of settings.
3. Press button "C" to cycle through settings: Month → Day → Enable/Disable → Month.
4. Use buttons "B" and "D" to change the values.
5. Press button "D" to enable or disable the date reminder.
6. When settings are complete, press button "A".

Time Memory Mode

In this mode, you can save up to 50 records, each containing hours, minutes, and seconds. Time records are saved chronologically.

Saving Time Records

In the Time Memory Mode, press button "D" to save the current time and date to the watch's memory.

Viewing Saved Records

In the Time Memory Mode, use button "D" to view saved time and date records.

Deleting Time Records

In the Time Memory Mode, hold button "A" and press button "D" to delete all saved records.

Stopwatch Mode

The Stopwatch Mode allows you to measure elapsed time, split times, and dual finishes. The total measurable time is limited to 23 hours, 59 minutes, and 59.99 seconds.

Measuring Elapsed Time

D (Start) → D (Stop) → D (Restart) → D (Stop) → A (Reset)

Measuring Split Times

D (Start) → A (Split Time) → A (Resume) → D (Stop) → A (Reset)

Dual Finish

D (Start) → A (Split: First finisher's time displayed) → D (Second finisher's time) → A (Cancel Split: Second finisher's time displayed) → A (Reset)

Technical Specifications

Product Information