Casio AQ-S820W Series AQS820W-3BV Green User Manual

Product Overview

The Casio AQ-S820W Series AQS820W-3BV Green is a robust and versatile timepiece designed for daily wear and active lifestyles. Featuring Casio's innovative Tough Solar power system, this watch eliminates the need for regular battery changes by converting light into energy. It combines analog and digital displays, offering comprehensive timekeeping functions and durability.

Key Features:

• Tough Solar Powered: Converts light into energy, ensuring long-lasting operation without battery replacement.
• World Time: Displays current time in 48 cities (31 time zones) with Daylight Saving Time function.
• 1/100-Second Stopwatch: Measures elapsed time with high precision.
• Auto-Calendar: Pre-programmed calendar up to the year 2099.
• LED Backlight: Provides illumination for easy reading in low-light conditions.
• Water Resistance: Rated for 100 meters (10 ATM), suitable for swimming and snorkeling.

Product View

This image displays the Casio AQ-S820W-3BV Green watch. It features a dark green resin case and strap, with a black bezel marked with "TOUGH SOLAR", "LIGHT", "SEARCH", "ILLUMINATOR", "MODE", and "ADJUST". The dial is dark grey with white hour markers and hands, and a digital display showing "SUN 36" and "DST". The watch face also indicates "5 ALARMS" and "WATER 100M RESIST".

Initial Setup

1. Charging the Watch (Tough Solar)

Your Casio AQ-S820W watch is powered by a solar cell that generates electricity from light. Ensure the watch is regularly exposed to light to maintain a sufficient charge. Avoid prolonged storage in dark places.

• Place the watch where its face is exposed to bright light (e.g., near a window).
• The charge level indicator (if available on the digital display) will show the current charge status.
• A full charge can take several hours under direct sunlight.

2. Setting the Time and Date

1. In Timekeeping Mode, press and hold the ADJUST button (top left) until the city code starts to flash.
2. Use the SEARCH button (bottom right) and LIGHT button (top right) to select your desired city code (time zone).
3. Press the MODE button (bottom left) to cycle through the setting items: DST (Daylight Saving Time), 12/24-hour format, Seconds, Hour, Minute, Year, Month, Day.
4. Use the SEARCH and LIGHT buttons to change the values for each setting item.
5. Once all settings are configured, press the ADJUST button to exit the setting mode.

3. Adjusting Analog Hands

The analog hands automatically synchronize with the digital time. If they are misaligned, perform the following adjustment:

1. In Timekeeping Mode, press and hold the ADJUST button until the city code flashes, then press MODE repeatedly until the hand setting screen appears (usually indicated by "0:00" or "H.SET").
2. Use the SEARCH button to advance the minute hand by 20 seconds. Hold it down to move the hands at high speed.
3. Press the ADJUST button to return to the Timekeeping Mode. The analog hands will automatically move to the current digital time.

Operating Modes

The MODE button (bottom left) is used to navigate between the different operating modes of the watch.

1. Timekeeping Mode

This is the default mode, displaying the current time, day of the week, and date. The analog hands also show the current time.

• Press LIGHT (top right) to activate the LED backlight.
• Press SEARCH (bottom right) to toggle between 12-hour and 24-hour formats.

2. World Time Mode

This mode allows you to view the current time in 48 cities (31 time zones) around the world.

• From Timekeeping Mode, press MODE once to enter World Time Mode.
• Use SEARCH to scroll through different city codes.
• Press ADJUST to toggle Daylight Saving Time (DST) for the currently displayed city.

3. Stopwatch Mode

The stopwatch measures elapsed time up to 59 minutes, 59.99 seconds.

• From World Time Mode, press MODE once to enter Stopwatch Mode.
• Press SEARCH to start/stop the stopwatch.
• Press ADJUST to reset the stopwatch to zero while it is stopped.

4. Alarm Mode (5 Alarms)

The watch features five independent daily alarms and an hourly time signal.

• From Stopwatch Mode, press MODE once to enter Alarm Mode.
• Use SEARCH to cycle through the alarms (AL1 to AL5) and the hourly time signal (SIG).
• To set an alarm: With the desired alarm displayed, press and hold ADJUST until the hour digits flash. Use SEARCH and LIGHT to set the hour and minute. Press MODE to move between hour and minute settings. Press ADJUST to confirm.
• Press LIGHT to toggle an alarm ON/OFF.

5. LED Backlight (Illuminator)

Press the LIGHT button (top right) in any mode to illuminate the digital display for approximately 1.5 seconds.

Care and Maintenance

Water Resistance

The Casio AQ-S820W is water resistant to 100 meters (10 ATM). This means it is suitable for everyday use and can withstand splashes, rain, showering, swimming, and snorkeling. Do not operate buttons while the watch is wet or submerged.

Cleaning

Wipe the watch regularly with a soft, dry cloth to remove dirt and moisture. For resin bands, you can wash them with water and mild soap, then rinse thoroughly and dry. Avoid using harsh chemicals or abrasive cleaners.

Solar Charging

To ensure optimal performance, expose the watch face to light regularly. Avoid storing the watch in dark places for extended periods, as this can deplete the rechargeable battery. If the charge level becomes low, functions may be disabled to conserve power.

Troubleshooting

Specifications

Warranty and Support

Casio products are manufactured to high quality standards and come with a limited warranty. For specific warranty terms and conditions, please refer to the warranty card included with your purchase or visit the official Casio website.

For technical support, service, or inquiries regarding your Casio AQ-S820W watch, please contact Casio customer service directly:

• Casio Official Website: www.casio.com
• Refer to the website for regional contact information and service centers.

Please have your model number (AQ-S820W-3BVCF) and purchase details ready when contacting support.