Casio Watch User Manual

General Care and Precautions

To ensure the longevity and proper functioning of your Casio watch, please observe the following precautions:

• Avoid exposing the watch to extreme temperatures.
• Handle the watch with care and avoid dropping it.
• Do not fasten the watch strap too tightly; a finger should fit between the strap and your wrist.
• Clean the watch and strap using a dry, soft cloth, or a soft cloth dampened with a mild neutral detergent solution. Never use volatile agents like gasoline, solvents, or spray cleaners.
• Store the watch in a dry place when not in use.
• Avoid contact with gasoline, cleaning solvents, spray aerosols, adhesives, paint, etc., as these can damage gaskets, the case, and the watch's finish.
• For straps with silk-screened designs, be careful during cleaning to avoid damaging the patterns.

Important Information

Battery

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

Water Resistance

Watches are classified by water resistance levels (from I to V). Ensure you use your watch according to its classification:

• Prohibitions for all water-resistant watches: Do not press buttons underwater, set hands underwater, or unscrew the crown underwater.
• If the watch is exposed to saltwater, rinse it thoroughly with fresh water and dry it completely.
• Avoid wearing watches with leather straps while swimming or exposing them to prolonged water contact.
• Plastic Straps: A white powdery substance may appear on plastic straps; this is harmless and can be wiped off. Sweat or moisture, or storage in high humidity, can damage or crack plastic straps. Wipe them clean with a soft cloth to prolong their life.
• Fluorescent Cases and Straps: Prolonged exposure to direct sunlight or moisture can cause fluorescent colors to fade. Wipe off any moisture immediately. Friction with other surfaces can transfer fluorescent paint.

Water Resistance Classification Table

Notes:

• 1: Not water-resistant. Avoid all moisture.
• 2: II WR (Water Resistant) meets ISO 2281. Brief water contact is acceptable.
• 3: III 5 Bar (50 meters) withstands water pressure for showering and brief swimming.
• 4: IV 10 Bar (100 meters) is suitable for normal swimming and snorkeling.
• 5: V 20 Bar (200 meters) is suitable for scuba diving (excluding depths requiring helium-oxygen mixtures).

Watch Care

• Never attempt to open the case or remove the back cover.
• The gasket protecting the watch from water and dust should be replaced every 2-3 years.
• If moisture enters the watch, have it checked immediately by a dealer or CASIO distributor.

General Description of Operating Modes

Press button 'A' to cycle through the modes: Current Time -> Calendar -> Alarm -> Dual Time -> Stopwatch -> Current Time.

Press button 'L' in any mode to illuminate the display.

Backlight

The backlight uses electroluminescent (EL) elements. Their brightness may decrease over time. A slight audible sound may occur during illumination, which is normal. Backlight visibility is reduced in direct sunlight. Frequent use shortens battery life.

• Model 2338 backlight illuminates both the electronic display and the dial.
• Model 2337 backlight illuminates only the electronic display.

Current Time Mode

Setting Time and Date

1. In Current Time Mode, press 'C'. The seconds digits will flash.
2. Press 'A' to reset the seconds to '00'. If 'A' is pressed when seconds are between 30 and 59, the minutes will increment by 1. If seconds are between 00 and 29, minutes remain unchanged.
3. Press 'C' to cycle through the setting items: Seconds -> Hours -> Minutes -> 12/24 Hour Format -> Seconds. Use 'A' to increase values. Holding 'A' increases values faster.
4. Press 'C' to switch between 12-hour and 24-hour formats. Use 'A' to toggle. 'P' indicates PM in 12-hour format.
5. Press 'C' to return to the Current Time Mode after completing settings.
6. If no button is pressed for several minutes while digits are flashing, the flashing stops, and the watch returns to the Current Time Mode automatically.

Calendar Mode

Setting the Calendar

1. Press 'C' to cycle through the setting items: Month -> Date -> Day of Week -> Month.
2. Press 'A' to increase the displayed values.
3. Press 'C' to confirm settings.

Alarm Mode

You can set a daily alarm that sounds for 20 seconds at the set time. An hourly time signal can also be enabled.

Setting the Alarm Time

1. In Alarm Mode, press 'C' to start setting. The hour digits will flash, and the alarm mode will be automatically set.
2. Press 'C' to cycle through the setting items: Hour -> Minutes -> Daily Alarm/Hourly Signal -> Hour.
3. Press 'A' to increase the displayed values. Holding 'A' increases values faster.
4. The 12/24 hour format for the alarm matches the format selected in the Current Time Mode.
5. Press 'C' to save the alarm settings.

Enabling/Disabling Alarm and Hourly Signals

Press button 'A' in Alarm Mode to cycle through the following settings:

• All signals ON (Daily Alarm and Hourly Signal)
• All signals OFF
• Daily Alarm only
• Hourly Signal only

(Diagrams showing indicator states for different modules are described textually here: The watch face shows indicators like "AL" for alarm and "SIG" for hourly signal. Pressing button 'A' cycles through combinations of these indicators being active or inactive, depending on the specific module.)

Checking Alarm Sound

Press and hold button 'A' in any mode to test the alarm sound.

Dual Time Mode

Setting the Dual Time

1. Press 'C' to cycle through the setting items: Hours -> Minutes -> 12/24 Hour Format -> Hours.
2. Press 'A' to increase the displayed values. Holding 'A' increases values faster.
3. Press 'C' to confirm settings.

Stopwatch Mode

The stopwatch measures elapsed time. The maximum measurement range is 59 minutes 59.99 seconds.

• Press 'C' to start and stop the stopwatch.
• Press 'C' again to reset the stopwatch display to 00:00:00.00.

(Diagrams show the stopwatch display with minutes, seconds, and 1/100 seconds, and arrows indicating button 'C' for start/stop/reset and button 'A' for split/lap.)

Technical Specifications

• Accuracy: ± 30 seconds per month (at normal temperature)
• Hands: Hour, Minute, Second
• Current Time Mode: Displays Hour, Minutes, Seconds. Supports 12/24 hour format switching.
• Calendar Mode: Displays Month, Date, Day of Week. Features an auto-calendar.
• Alarm Mode: Provides a daily alarm and an hourly time signal.
• Dual Time Mode: Displays Hour, Minutes, Seconds. Supports 12/24 hour format switching.
• Stopwatch:
  • Unit of Measure: 1/100 second
  • Maximum Measurement: 23 hours 59 minutes 59.99 seconds
  • Measurement Modes: Elapsed time
• Other: Backlight (Electroluminescent panel)
• Battery: One SR721W battery. Estimated 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'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: ООО «Касио» (LLC "Casio")

Importer Address: ul. Butyrskaya, d. 77, Moscow 127015, Russia

Warranty Period: 1 year

Authorized Service Organization Address: As specified on the warranty card.