CASIO L25, LB611, RFT-100 Watch User Manual

Important Information

Battery

The battery installed at the factory is for testing purposes and may have a shorter service life than indicated in the specifications. If the backlight is dim or the display does not turn on, replace the battery at your nearest CASIO dealer or distributor.

Water Resistance

Watches are classified by water resistance levels (I through V). Refer to the table below for correct usage:

Notes for relevant sections:

• Level I: The watch is not water-resistant. Avoid all contact with moisture.
• Level III: Do not press the watch buttons underwater.
• Level IV: If the watch is exposed to saltwater, rinse it thoroughly and wipe it dry.
• Level V: The watch can be used for scuba diving (except for depths requiring helium-oxygen mixtures).

Some water-resistant watches have leather straps. Do not wear these watches while swimming or engaging in any other activity where the strap may become submerged in water.

Watch Care

• Never attempt to open the case or remove the back cover.
• The rubber 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 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 mild solution of neutral detergent. Never use volatile substances like gasoline, solvents, or spray cleaners.
• When not in use, store the watch in a dry place.
• Avoid contact with gasoline, cleaning solvents, aerosol sprays, adhesives, paint, etc., as chemical reactions can damage gaskets, the case, and polish.
• Some models have silk-screened designs on the strap. Clean these carefully to avoid damaging the designs.
• For watches with plastic straps: A white powdery substance may appear on the strap. This is harmless. Sweat or moisture can damage plastic straps, leading to breakage or cracking. Wipe the strap clean with a soft cloth to ensure a long service life.
• For watches with fluorescent cases and straps: Prolonged exposure to direct sunlight can cause the fluorescent color to fade. Prolonged contact with moisture can also cause fading. Wipe off any moisture promptly. Prolonged contact with other wet surfaces can cause discoloration. Keep fluorescent surfaces dry and avoid contact with other surfaces. Strong friction can transfer fluorescent paint to other surfaces.

CASIO Computer Co., Ltd. is not responsible for any damage that may occur from the use of this watch and does not accept claims from third parties.

General Operation

Current Time Mode Display

The display shows the current time, including hours, minutes, and seconds. An indicator shows AM/PM (or 24-hour format). The calendar display shows the Month and Day.

Diagram Description:

• The display shows the current time as 10:58:50. The PM indicator is shown.
• The calendar display shows Month 6 and Day 30.

Mode Switching

Button A switches between watch modes. The sequence of modes is typically: Current Time Mode → Calendar Mode.

Diagram Description:

• Diagram shows pressing Button A to switch modes.
• Diagram shows transition from Current Time Mode to Calendar Mode via Button A.

Setting Time and Date

Follow these steps to set the time and date:

1. Press Button B twice to enter hour correction. Press Button A to increment the hour.
2. Press Button B to enter minute correction. Press Button A during a time signal to set the seconds to 00.
3. Press Button B to enter month correction. Press Button A to increment the month.
4. Press Button B to enter day correction. Press Button A to increment the day.
5. Press Button B to finish the settings and save the result.

If no operation is performed for approximately 2 minutes in correction mode, the watch will automatically return to the current timekeeping mode.

The calendar system does not account for leap years (February 29th). You must manually adjust the date for leap years.

Accuracy Adjustment

Accuracy adjustment can be performed approximately once a month by synchronizing with a time signal:

1. Press Button B. The seconds digits will flash.
2. Press Button A during a time signal to set the seconds to 00.

Technical Specifications

• Accuracy: ±30 seconds per month at normal temperature.
• Display: Hour, Minute, Second, AM/PM indicator, Month, Day.
• Calendar System: Auto calendar, February 28 days.
• Battery:
  • Modules 350/1007/1074: One battery (CR2016). Approx. 5 years service life.
  • Module 401: One battery (BR-1216 or CR-1216). Approx. 5 years service life.
  • Modules 501/592/692/695/1070: One battery (CR-1216). Approx. 5 years service life.
  • Module 681: One battery (SR-721SW). Approx. 3 years service life.
  • Module 895: One battery (CR-1216). Approx. 3 years service life. For this model, the battery is not replaceable, so the battery life is the watch's service life.

Product Information

• Name: Wrist electronic watch / Electronic-mechanical quartz watch (Men's/Women's).
• Brand: CASIO
• Manufacturer: CASIO COMPUTER Co., Ltd.
• Manufacturer Address: 6-2, Hon-machi 1-chome, Shibuya-ku, Tokyo 151-8543, Japan.
• Importer: OOO "Casio", 127055, Moscow, Sushchevskaya St., Bldg. 27, Str. 1, Russia.
• Country of Origin: Japan.
• Warranty Period: 1 year.
• Address for authorized organization to receive claims: As specified in the warranty card.
• Compliance: Product complies with GOST 26270-98 (clause 4.35). Certificate of Conformity No. POCC JP. АЯ46.Д00003.