CASIO BG-300 Watch Module 1522/1523 User Manual

About This Information

Please read this information first.

Battery

The battery installed at the factory may discharge during storage and shipping. If the battery indicator becomes dim, replace the battery at your CASIO dealer or distributor.

Water Resistance

Watch water resistance classes are marked from "I" to "V". Check the table below for proper usage conditions.

Notes:

• Class I watches are not water resistant; avoid any moisture.
• Do not press buttons underwater.
• For Class III, IV, and V, you can press buttons underwater, but do not press recessed buttons. If seawater gets on the watch, rinse it thoroughly with fresh water and dry it.
• Class V watches can be used for diving (except for depths requiring a helium-oxygen gas mixture).
• Some water-resistant watches have leather bands. Do not wear these models for swimming or any other activity that involves submerging the band in water.

Precautions for Use

• Do not attempt to open the case or remove the back cover.
• The water and dust-proof gasket should be replaced every 2-3 years.
• If water or condensation enters the watch, take it to your CASIO dealer or distributor immediately.
• Do not expose the watch to excessively high temperatures.
• While the watch has an shock-resistant mechanism, avoid strong impacts or dropping it on hard surfaces.
• Do not overtighten the band. A finger should fit under the band.
• Clean the watch and band with a soft cloth, dry or dampened with soapy water. Do not use volatile solvents (e.g., gasoline, thinners, aerosol cleaners).
• Always store the watch in a dry place when not in use.
• Avoid exposure to aggressive chemicals like gasoline, cleaning agents, or aerosols, as they can damage gaskets, cases, and finishes.
• Some bands have printed characteristics. Clean them carefully to avoid erasing the print.
• For watches with plastic bands: A white powdery residue may appear; this is harmless and can be removed by wiping with a cloth.
• Moisture on plastic bands can cause them to warp, crack, or tear. Wipe off dirt or moisture promptly.
• For watches with fluorescent bands/cases: Prolonged exposure to direct sunlight or moisture can cause fluorescence to fade. Wipe off moisture promptly and avoid contact with other surfaces.
• Rubbing fluorescent surfaces against other surfaces can transfer the printed color.
• CASIO COMPUTER CO LTD is not responsible for third-party claims arising from the use of this watch.

General Instructions

Press [Button C] to switch between modes. The watch automatically returns to Timekeeping Mode if no buttons are pressed for 2-3 minutes.

The animated display shows various moving texts and graphics depending on the mode and operation.

Press [Button D] in any mode for a 2-second backlight. [Backlight symbol]

Operations for modules 1522 and 1523 are identical.

[Diagram showing watch face with buttons labeled A, B, C, D and mode indicators like ALM, SIG, SPE, IQ ALM. Also shows module numbers 1523 and 1522.]

Timekeeping Mode

In Timekeeping Mode, press [Button D] to switch between 12-hour and 24-hour formats. In 12-hour format, a day-of-week indicator appears. In 24-hour format, the display cycles between names/text and the 'G' marker.

Setting Time and Date

1. In 12-hour format, press [Button A] in Timekeeping Mode. The seconds will flash for setting.
2. Press [Button C] to cycle through the following settings: Seconds, Minutes, Hours, Month, Day.
3. When seconds are flashing, press [Button D] to reset them to "00". If seconds are reset between 30-50, the minutes will increment by 1. If reset between 00-29, minutes remain unchanged.
4. When other digits (except seconds) are flashing, press [Button D] to increase the value. Holding [Button D] increases the value rapidly.
5. After setting time and date, press [Button A] to return to Timekeeping Mode.

The day of the week is set automatically with the date.

The date can be set from January 1, 1995, to December 31, 2039.

If no buttons are pressed for several minutes while a digit is flashing, the watch returns to Timekeeping Mode and flashing stops.

Entering Text in Timekeeping Mode

You can enter up to eight characters that will appear on the animated display in 24-hour format.

1. Press [Button A] in Timekeeping Mode to select 24-hour format.
2. Press [Button D] to cycle through available characters for the current cursor position. Holding [Button D] scrolls rapidly.
3. When the desired character appears, press [Button C] to move the cursor to the right.
4. Repeat steps 2 and 3 to enter all desired characters.
5. After entering text (up to 8 characters), press [Button A] to save it.

Alarm Mode

The daily alarm sounds for 20 seconds at the set time each day. Press any button to stop the alarm. The hourly chime sounds at the start of each hour.

Setting the Alarm

1. Press [Button A] in Alarm Mode. The hour digits will flash for setting.
2. Press [Button C] to cycle through settings: Hour, Minute.
3. Press [Button D] to increase the value. Holding [Button D] increases rapidly.
4. After setting the alarm time, press [Button A] to return to Alarm Mode.

The alarm format (12/24-hour) matches the Timekeeping Mode setting.

In 12-hour format, note the AM/PM indicator (P for PM).

If no buttons are pressed for several minutes while a digit is flashing, the watch returns to Alarm Mode and flashing stops.

Turning Alarm and Hourly Chime On/Off

Press [Button D] in Alarm Mode to cycle through the following states:

• [Alarm On / Hourly Chime On] [Bell emoji] [Chime emoji]
• [Alarm Off / Hourly Chime Off] [Mute bell emoji] [Mute chime emoji]
• [Alarm On / Hourly Chime Off] [Bell emoji] [Mute chime emoji]
• [Alarm Off / Hourly Chime On] [Mute bell emoji] [Chime emoji]

Checking the Alarm

Press [Button D] in Alarm Mode to sound the alarm briefly. [Sound symbol]

Timer Mode

The countdown timer can be set from 1 minute to 60 minutes. When the countdown reaches 00, the alarm sounds for 10 seconds or until any button is pressed.

Setting Countdown Time

1. Press [Button A] in Timer Mode. The minute digits will flash for setting.
2. Press [Button D] to increase the value. Holding [Button D] increases rapidly.
3. After setting the countdown time, press [Button A] to return to Timer Mode.

If no buttons are pressed for several minutes while a digit is flashing, the watch returns to Timer Mode and flashing stops.

Using the Countdown Timer

1. Press [Button D] in Timer Mode to start the countdown. [Play button emoji]
2. Press [Button D] again to stop the timer. [Pause button emoji]
3. You can resume the countdown by pressing [Button D].
4. Stop the timer and press [Button A] to reset the countdown time to the starting value. [Reset symbol]

When the countdown finishes, a 10-second alarm sounds unless interrupted. The timer stops and resets to the start value after the alarm.

Countdown Timer Indicators

Alarms, backlight, and colored markers indicate countdown progress as shown below:

Note: If the starting value is 5 minutes or less, the color marker is initially yellow.

Stopwatch Mode

In this mode, you can measure elapsed time, split times, and record the first two results in competitions. Measurement range: 23 hours, 59 minutes, 59.99 seconds.

Measuring Elapsed Time

1. Press [Button D] to start the stopwatch. [Play button emoji]
2. Press [Button D] to stop the stopwatch. [Pause button emoji]
3. You can end the measurement by pressing [Button D] again.
4. Press [Button A] to reset the stopwatch to zero. [Reset symbol]

Recording Split Times

1. Press [Button D] to start the stopwatch.
2. Press [Button A] to display a split time. The stopwatch continues running.
3. Press [Button A] to clear the split time and display the total elapsed time.
4. Repeat steps 2 and 3 as needed.
5. Press [Button D] to stop the measurement.
6. Press [Button A] to reset the stopwatch to zero.

Recording First Two Competition Results

1. Press [Button D] to start the stopwatch.
2. Press [Button A] when the first competitor finishes to record their result.
3. Press [Button D] when the second competitor finishes.
4. Pressing [Button A] will display the second competitor's result.
5. Press [Button A] to reset the stopwatch to zero.

Specifications

Accuracy: +/-15 seconds per month at normal temperature.

Timekeeping Mode: Hours, minutes, seconds, AM/PM indicator, month, date, day of the week.

Time System: Switchable between 12-hour and 24-hour formats.

Calendar System: Auto-calendar, programmed from 1995 to 2040.

Alarm Mode: Daily alarm, hourly chime.

Timer Mode: Measurement step: 1 second. Setting range: 1 minute to 60 minutes.

Stopwatch Mode: Measurement step: 1/100 second. Measurement range: 23 hours, 59 minutes, 59.99 seconds. Measurement types: Elapsed time, split time, two competition results.

Other: Backlight function. [Light bulb emoji]

Battery: One lithium battery (Type CR1220).

Battery Life: Approximately 15 months under the following conditions:

• 1 alarm operation per day (20 seconds)
• 1 countdown timer operation per week
• 2 seconds of backlight use per day

More frequent backlight use shortens battery life:

• 6 seconds per day: approximately 12 months
• 10 seconds per day: approximately 9 months

Product Information

Name: Electronic / Electro-mechanical Quartz Wristwatch (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 "Kasio", 127055, Moscow, ul. Sushchevskaya, d.27, str. 1, Russia

Country of Manufacture: Japan

Warranty Period: 1 year

Address for Authorized Service Organization: As specified in the warranty card.

Product Compliance: Complies with GOST 26270-98 (p.4.35)

Certificate of Conformity No.: ROSS JP. АЯ 46.Д00003