Casio Watch User Manual

Important Information

Please read this important information before proceeding.

Battery

Your watch is equipped with a battery installed at the factory. If the backlight is dim or the display is faint, replace the battery immediately at the nearest CASIO dealer or distributor.

Water Resistance

Watches are classified by rating (I to V) according to their water resistance. Check your watch's rating in the table below for proper operation.

Notes for respective ratings:

• I: Watches are not protected from water. Avoid all moisture.
• II: Do not pull out the crown while the watch is wet.
• III: Do not press the watch buttons underwater.
• IV: If the watch is exposed to salt water, rinse it thoroughly and dry it.
• V: Watches can be used for scuba diving (except for depths requiring a helium-oxygen mixture).

Some water-resistant watches have leather straps. Do not wear these watches while swimming or engaging in other activities where the strap may get wet.

Care and Maintenance

• Never attempt to open the case or remove the back cover.
• The 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 temperatures.
• While designed for normal use, avoid rough handling and dropping the watch.
• 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 water-based solution of mild neutral detergent. Never use volatile substances like benzine, solvents, or spray cleaners.
• When not using the watch, store it in a dry place.
• Avoid contact with benzine, cleaning solvents, spray aerosols, adhesives, paint, etc. Chemical reactions with these materials can damage gaskets, the case, and polish.
• Some models feature silk-screened designs on the strap. Clean these straps carefully to avoid damaging the designs.

For Watches with Plastic Straps:

• A white powdery substance may appear on the strap. This substance is harmless to your skin or clothing and can be easily removed by wiping with a cloth.
• Exposure of a plastic strap to sweat or moisture, or storing it in high humidity conditions, can lead to damage, tearing, or cracking. To ensure a long service life for a plastic strap, wipe it clean of dirt and water with a soft cloth whenever possible.

For Watches with Fluorescent Cases and Straps:

• Prolonged exposure to direct sunlight can cause the fluorescent coloring to gradually fade.
• Prolonged contact with moisture can cause the fluorescent coloring to gradually fade. If any moisture gets on the watch surface, wipe it off as soon as possible.
• Prolonged contact with any other wet surface can lead to discoloration of the fluorescent coloring. Ensure the fluorescent surface is free of moisture and avoid contact with other surfaces.
• Strong friction of 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 that may occur from the use of this watch, nor will it accept claims from third parties.

Manufacturer: CASIO COMPUTER Co., Ltd. (CASIO Computer Co., Ltd.)
Manufacturer Address: 6-2, Hon-machi 1-chome, Shibuya-ku, Tokyo 151-8543, Japan

General Description of Operating Modes

The illustration shows the watch in the Timekeeping Mode. Press button "A" to cycle through the modes: Timekeeping Mode → Calendar Mode → Alarm Mode → Dual Time Mode → Stopwatch Mode → Timekeeping Mode.

In any mode, press button "L" for display illumination.

Timekeeping Mode

Setting Time and Date

1. In Timekeeping Mode, press button "C". The second digits will flash.
2. While the second digits are flashing, press button "A" to reset the seconds to "00". If button "A" is pressed when the seconds are between "30" and "59", the minutes will be incremented by 1 simultaneously with the seconds resetting to "00". If the seconds are between "00" and "29", the minutes will remain unchanged.
3. Press button "C" to cycle through the fields in the following sequence: Seconds → Hours → Minutes → 12/24 Hour Format. Use button "A" to increase the value. Holding the button down allows values to be changed at a higher speed.
4. Press button "C" to switch between 12-hour and 24-hour formats. Use button "A" to toggle between formats. In the 12-hour format, the "P" indicator appears for PM times.
5. After setting the time and date, press button "C" to return to the original Timekeeping Mode.
6. If you do not press any button for several minutes (while digits are flashing), the flashing will stop, and the watch will automatically return to the Timekeeping Mode.

Backlight

Press button "L" in any mode to illuminate the display for two seconds. The backlight uses electro-luminescent (EL) elements, whose brightness decreases over extended use.

Backlight Details

• The watch emits an audible signal when the display is illuminated. This is due to the vibration of the EL elements and is not an indication of a malfunction.
• The backlight is difficult to see if direct sunlight falls on the watch.
• Frequent use of the backlight shortens the battery life.
• The backlight on model 2338 illuminates both the electronic display and the dial.
• The backlight on model 2337 illuminates only the electronic display.

Setting Dial Time

In any mode, press button "B" to advance the dial time. Each press of button "B" advances the time by 20 seconds. Holding the button down allows values to be changed at a higher speed. You can only advance the time.

Calendar Mode

1. Press button "C" to cycle through the fields in the following sequence: Month → Date → Day of Week → Month.
2. Press button "A" to increase the values.
3. After setting, press button "C".

Alarm Mode

You can set a daily alarm that sounds for 20 seconds when the set time is reached. If the hourly time signal is enabled, a short beep sounds at the top of each hour.

Setting Alarm Time

1. In the Alarm Mode, press button "C" to start setting. The hour digits will flash. The watch automatically enters the alarm setting mode.
2. Press button "C" to cycle through the fields in the following sequence: Hour → Minutes → Daily Alarm/Hourly Time Signal setting. Use button "A" to increase the value. Holding the button down allows values to be changed at a higher speed.
3. The 12/24 hour format for the Alarm Mode matches the format selected for the Timekeeping Mode.
4. After setting the hour and minute values, press button "C" again to save the alarm settings.

Turning Alarm and Hourly Signal On/Off

In the Alarm Mode, press button "A" to cycle through the alarm settings: All ON → All OFF → Daily Alarm Only → Hourly Time Signal Only → All ON.

Checking Alarm Sound

Press and hold button "A" in any mode to check the alarm sound.

Dual Time Mode

1. Press button "C" to cycle through the fields in the following sequence: Hours → Minutes → 12/24 Hour Format.
2. Use button "A" to increase the value. Holding the button down allows values to be changed at a higher speed.
3. After setting, press button "C".

Stopwatch Mode

The stopwatch mode allows you to measure elapsed time. The total measurement range is limited to 59 minutes and 59.99 seconds.

1. Press button "C" to start and stop the stopwatch.
2. After finishing, press button "C" to reset the stopwatch time to 00.

Technical Specifications

• Accuracy: ± 30 seconds per month (under normal temperature).
• Hands: Hour, Minute, Second.
• Timekeeping Mode: Hour, Minute, Seconds. Switchable between 12/24 hour formats.
• Calendar Mode: Month, Date, Day of Week. Auto calendar.
• Alarm Mode: Daily alarm, hourly time signal.
• Dual Time Mode: Hour, Minute, Seconds. Switchable between 12/24 hour formats.
• Stopwatch Mode: Unit of measurement: 1/100 second. Maximum measurement range: 23 hours 59 minutes 59.99 seconds. Measurement types: elapsed time.
• Other:
• Backlight: Electro-luminescent panel.
• Battery: One battery (SR721W). Battery life is approximately 2 years, based on 2 seconds of backlight use per day and 20 seconds of alarm use per day.

Product Information

• Product Name: Electronic / Electro-mechanical Quartz Wristwatches (Men/Women)
• Brand: CASIO
• Manufacturer: CASIO COMPUTER Co., Ltd. (CASIO Computer Co., Ltd.)
• Manufacturer Address: 6-2, Hon-machi 1-chome, Shibuya-ku, Tokyo 151-8543, Japan
• Importer: OOO "Casio", Moscow, Russia.
• Country of Origin: Japan
• Warranty Period: 1 year
• Authorized Service Organization for Claims: As indicated on the warranty card.
• Product Compliance: Conforms to GOST 26270-98 (clause 4.35). Certificate of Conformity No. POCC JP. АЯ 46.Д00003.