CASIO Module 350 User Manual

Important Information

Battery

The battery in your watch is installed at the factory and should be replaced immediately upon the first signs of insufficient power (e.g., backlight not turning on, dim display) by an authorized CASIO dealer or distributor. The battery is installed at the factory for testing purposes, and its service life may be shorter than indicated in the watch's technical specifications.

Water Resistance

Watches are classified into categories (I to V) according to their water resistance. Refer to the table below to determine your watch's rating for proper usage.

Notes on Water Resistance Sections

• Category I: The watch is not water-resistant. Avoid exposure to any moisture.
• Category III: Do not press the watch buttons underwater.
• Category IV: If the watch is exposed to salt water, rinse it thoroughly with fresh water and dry it.
• Category V: The watch can be used for scuba diving (except for depths requiring helium-oxygen mixtures).
• Some water-resistant watches may have leather straps. Do not wear these watches while swimming or engaging in other activities where the strap may get wet.

Watch Care

• Never attempt to open the case or remove the back cover.
• 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 temperatures.
• While designed for normal use, avoid rough handling and dropping the watch.
• Do not fasten the strap too tightly. There should be enough space for a finger 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 such as gasoline, solvents, aerosol cleaners, etc.
• When not in use, store the watch 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 polish.
• Some models feature silk-screened designs on the strap. Be careful when cleaning these straps to avoid damaging the designs.

For Watches with Plastic Straps

• 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 cloth.
• Exposure of a plastic strap to sweat or moisture, or storage in high humidity, can lead to damage, tearing, or cracking of the strap. To ensure a long service life for plastic straps, wipe them clean of dirt and water with a soft cloth whenever possible.

For Watches with Fluorescent Cases and Straps

• Prolonged exposure to direct sunlight may cause the fluorescent color to fade gradually.
• Extended contact with moisture may cause the fluorescent color to fade gradually. If any moisture gets on the watch surface, wipe it off as soon as possible.
• Contact with any other wet surface may cause the fluorescent color to discolor. Ensure the fluorescent surface is dry and avoid contact with other surfaces.
• Rubbing a surface with fluorescent paint against another surface may transfer the fluorescent paint.

General Operation

CASIO COMPUTER CO., LTD. is not responsible for any damage that may arise from the use of this watch, nor does it accept claims from third parties.

Mode Switching

Figure 1 shows the watch in Current Time Mode. Button A cycles through the watch modes. Mode transitions are sequential: Current Time Mode → Calendar Mode.

Current Time Mode: Display shows Hour, Minute, Second. PM (indicator) AM (no indicator).

Calendar Mode: Display shows Month, Day.

Setting Time and Date

1. Press Button B twice to adjust the hour digits. Each press of Button A increases the hour display.
2. Press Button B. The second digits will start flashing. Press Button A when the time signal is received. The second counter will reset to 00.
3. Press Button B to adjust the minute digits. Use Button A to adjust the value.
4. Press Button B to adjust the month digits. Use Button A to adjust the value.
5. Press Button B to adjust the day digits. Use Button A to adjust the value.
6. Press Button B to finish settings and save the result.
7. If no operation is performed for 2 minutes in setting mode, the watch will automatically return to the current time mode.
8. The calendar system does not account for February having 29 days. Manually adjust the date for leap years.

Accuracy Adjustment

This section describes how to adjust the watch's accuracy.

• Press Button B. The second digits will start flashing.
• Press Button A when the time signal is received. The second counter will reset to 00.
• Accuracy adjustment can be performed approximately once a month using time signals.

Module Variations and Displays

Different module numbers are associated with specific watch displays:

• Module 350/592/692/695/895: Displays time (Hour, Minute, Second) with PM indicator.
• Module 401/501: Displays time (Hour, Minute, Second) with PM indicator.
• Module 1007/1070/1074: Displays time (Hour, Minute, Second) with PM indicator.

Technical Specifications

• Accuracy at normal temperature: ±30 seconds per month
• Current Time Mode: Hour, minute, second, AM/PM indicator, month, day
• Calendar System: Auto calendar, 28 days in February.
• Battery Power:
  • 350/1007/1074: One battery (type CR-2016). Approx. 5-year service life.
  • 401: One battery (type BR-1216 or CR-1216). Approx. 5-year service life.
  • 501/592/692/695/1070: One battery (type CR-1216). Approx. 5-year service life.
  • 681: One battery (type SR-721SW). Approx. 3-year service life.
  • 895: One battery (type CR-1216). Approx. 3-year service life. For this model, the battery cannot be replaced, so the battery's service life is the watch's service life.

Product Information

• Name: Electronic / Electro-mechanical quartz wristwatches (Men's/Women's)
• 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 «Kasio», 127055, Moscow, ul. Sushchevskaya, d.27, str. 1, Russia
• Country of Origin: Japan
• Warranty Period: 1 year
• Address of Authorized Organization for Claims: As indicated on the warranty card.
• Certifications: Product conforms to GOST 26270-98 (cl.4.35). Certificate of Conformity No. ROSS JP. АЯ 46.Д00003.