Casio WVA-M150, M490 Watch User Manual

Battery

• If you notice signs of low power (dim display or no backlight), replace the battery at an authorized CASIO dealer or distributor. The battery included with your watch is for testing purposes and may have a shorter service life than a standard battery.

Water Protection

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

Notes for respective sections:

1. I: The watch is not water-resistant. Avoid all contact with moisture.
2. III: If the watch is exposed to salt water, rinse it thoroughly and dry it.
3. IV: If the watch is exposed to salt water, rinse it thoroughly and dry it.
4. V: The watch can be used for scuba diving (except for depths requiring a helium-oxygen mixture).

ATTENTION!!!

For all types of watches, it is prohibited to:

• press buttons underwater
• set hands underwater
• unscrew the crown underwater

Watch Care

• 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.
• The rubber gasket that 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 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 substances (e.g., gasoline, solvents, aerosol cleaning agents, etc.).
• When not wearing your watch, store it in a dry place.
• Avoid contact with gasoline, cleaning solvents, aerosol sprays, adhesives, paint, etc. Chemical reactions caused by these materials can damage gaskets, the case, and the watch's finish.
• Some watch models have silk-screened designs on their straps. 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 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 humid conditions, 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 bands...

• Prolonged exposure to direct sunlight can cause the fluorescent color to fade gradually. Ensure the fluorescent surface is dry and avoid contact with other surfaces.
• Rubbing a surface with fluorescent paint against another surface can transfer the fluorescent paint to that surface.

Calibration

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

Before using the watch, set your current city code.

In Timekeeping Mode, press button 'C' to cycle through the display of current time, day of the week, and month/date.

Viewing Last Signal Reception Data

When entering Calibration Mode, the display shows data from the last signal reception.

If none of the recent signal receptions were successful, the display shows '- - -'.

SOUND SIGNAL MODE

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

• If the hourly chime is enabled, a short beep will sound at the start of each hour.
• You can stop the sound by pressing any button.

STOPWATCH MODE

The Stopwatch Mode allows you to measure elapsed time. The maximum measurement range is 59 minutes, 59.99 seconds.

WORLD TIME MODE

This mode allows you to view the local time in any of 29 cities. World Time values are automatically synchronized with the current time.

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

TIMEKEEPING MODE

1. In Timekeeping Mode, press and hold button 'A' until the city code display flashes, indicating the start of setting operations.
2. Press button 'B' to cycle through the settings: City Code – Daylight Saving Time (DST) – 12/24 Hour Format – Seconds – Hours – Minutes – Year – Month – Display Language.
3. If you select seconds for correction (the seconds display flashes), press button 'C' to reset the seconds to 00. If you press button 'C' when the seconds are between 30 and 59, the seconds will reset to 00 and one minute will be added to the minutes count. If seconds are between 00 and 29, the minutes count will not change.
4. Use button 'C' to change values for minutes, etc.
5. The day of the week is set automatically according to the date. The date can be set from January 1, 2000, to December 31, 2099.
6. Press button 'C' to switch between 12-hour and 24-hour time formats. In 12-hour format, 'P' indicates PM.
7. Use button 'C' to change the city code for your current location.
8. In the DST setting, use button 'C' to select: 'A' (automatic DST on/off), 'OF' (DST off), 'ON' (DST on). Auto-switching is not available for all cities.
9. Press button 'C' to switch the display language: English – Japanese.
10. Press button 'A' when finished.

ANALOG TIME MODE

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

1. In Analog Time Mode, press and hold button 'A' for 3 seconds until the current time display flashes.
2. Use button 'C' to adjust the minutes and hours. Pressing button 'C' advances the time by 10 seconds. Pressing button 'D' allows for faster adjustment.

Backlight

• In any mode, press button 'A' to turn on the backlight.
• During illumination, the watch may emit a faint sound. This is due to the vibration of the illumination element and does not indicate a malfunction.
• The backlight may be difficult to see in direct sunlight.
• Frequent use of the backlight shortens battery life.

POWER SUPPLY

This watch is equipped with a solar cell and a rechargeable battery powered by the solar cell. If your watch is kept in the dark for extended periods, the rechargeable battery will discharge.

Current Time Mode

Time, minutes, seconds, AM/PM indicator, year, month, date, day of the week.

Auto calendar from 2000 to 2099.

12/24 hour format, DST (Daylight Saving Time).

Analog Time Mode

Analog time automatically synchronizes with digital time.

Calibration Signal

Calibration signal reception (5 times daily), forced calibration, auto-calibration.

World Time Mode

Current time in 29 cities.

Sound Signal Mode

Daily alarm, hourly chime indicator.

Stopwatch Mode

Maximum measurement range: 59 minutes, 59.99 seconds.

Measurement of elapsed times.

Other

Backlight, battery charge indicator.

Product Information

Product complies with GOST 26270-98 (clause 4.35)

Certificate of Conformity No. POCC JP. АЯ46.Д42228 / POCC JP. АЯ46.Д42071 / POCC JP. АЯ46.Д42230