Casio BG-1223 Watch User Manual (Module 3058/3059)

Battery

If you notice faint display or lack of backlight, replace the battery at a CASIO dealer. The battery included may be for testing purposes and have a shorter life than a standard battery.

Water Resistance

Watches are classified by water resistance rating (I to V). Refer to the table below to understand usage rules.

Notes:

• I: Not water resistant. Avoid all moisture.
• III: If exposed to salt water, rinse thoroughly with fresh water and dry.
• IV: If exposed to salt water, rinse thoroughly with fresh water and dry.
• V: Suitable for scuba diving (excluding saturation diving requiring helium-gas mixtures).

CAUTION!!! For all watch categories, do not:

• Press buttons underwater
• Unscrew the crown underwater

IMPORTANT!!!

Some water-resistant watches have leather bands. Do not wear these watches while swimming or engaging in other activities that may submerge the band in water.

Watch Care

• Replace the gasket protecting the watch from water and dust every 2-3 years.
• If moisture enters the watch, have it checked immediately by a CASIO dealer.
• Do not expose the watch to extreme high or low temperatures.
• While designed for normal use, avoid rough handling and dropping the watch.
• Do not wear the band too tightly. A finger should fit between your wrist and the band.
• Clean the watch and band with a dry soft cloth, or a soft cloth dampened with a mild neutral detergent solution. Never use volatile solvents (e.g., benzine, thinners, spray cleaners).
• Store the watch in a dry place when not in use.
• Avoid contact with benzine, cleaning solvents, spray aerosols, adhesives, paints, etc. Chemical reactions can damage gaskets, cases, and finishes.
• Some models have silk-screened designs on the band. Clean these carefully to avoid damaging the designs.

For watches with resin bands...

• You may notice a white powdery substance on the band. This is harmless and can be wiped off with a soft cloth.
• Exposure to sweat or moisture, or storage in high humidity, can damage or crack the resin band. To ensure longevity, wipe the band clean with a soft cloth frequently.

For watches with fluorescent cases and bands...

• Prolonged exposure to direct sunlight may cause the fluorescent color to fade.
• Prolonged contact with moisture may cause the fluorescent color to fade. If the watch gets wet, dry it as soon as possible.
• Contact with damp surfaces may cause discoloration of the fluorescent color. Keep the fluorescent surface dry and avoid contact with other surfaces.
• Rubbing a surface with fluorescent paint against another surface may transfer the paint.

Timekeeping Mode

Setting the Time and Date

1. In Timekeeping Mode, press [A]. The seconds will flash.
2. Press [C] to cycle through the settings: Seconds → City Code → DST (Daylight Saving Time) → Hour → Minute → 12/24 Hour Format → Year → Month → Day → Seconds.
3. To reset seconds (if flashing), press [D]. If seconds are between 30-59 when [D] is pressed, seconds reset to 00 and the minute count increases by 1. If seconds are between 00-29, the minute count does not change.
4. Use [D] to increase values and [B] to decrease them. Holding a button speeds up the change.
5. The day of the week is set automatically based on the date.
6. You can set the year from 2000 to 2099.
7. Press [D] to turn the DST (Daylight Saving Time) indicator on or off.
8. Press [D] to switch between 12-hour and 24-hour formats. In 12-hour format, [A] indicates AM, [P] indicates PM.
9. Use [B] and [D] to select the desired city code.
10. Press [A] twice to return to Timekeeping Mode.
11. If no buttons are pressed for a while, the watch will automatically return to Timekeeping Mode.

Backlight

• Press [B] in any mode to turn on the backlight.
• The backlight uses electro-luminescent (EL) panels, which degrade over time.
• The watch may emit a sound when the backlight is on due to vibrating components; this is not a malfunction.
• The backlight is difficult to see in direct sunlight.
• Frequent use of the backlight shortens battery life.

Adjusting Backlight Duration

1. In Timekeeping Mode, press and hold [A] until the seconds flash.
2. Press [B] to cycle through backlight durations: 1.5 seconds or 3 seconds.
3. Press [A] to confirm settings.

Button Tone On/Off

Press [C] in any mode to turn button tones on or off.

World Time Mode

This mode displays the time in any of 48 cities worldwide (29 time zones).

World time is synchronized with the current time, so manual setting is not required.

Press [D] to view times in other cities.

Setting Daylight Saving Time

1. Use [D] to select the city for which you want to set DST.
2. Press [A] to turn DST on or off.

Stopwatch Mode

The stopwatch mode allows for measuring elapsed time, split times, and two finishes.

The maximum measuring range for elapsed time is 59 minutes, 59.99 seconds.

a) Measuring elapsed time

[D] (Start) → [D] (Stop) → [D] (Restart) → [D] (Stop) → [A] (Reset)

b) Measuring split times

[D] (Start) → [A] (Split) → [A] (Resume) → [D] (Stop) → [A] (Reset)

c) Measuring two finishes

[D] (Start) → [A] (Split. First finish. Display shows 1st finish time) → [D] (Second finish) → [A] (Cancel split. Display shows 2nd finish time) → [A] (Reset)

Countdown Timer Mode

The countdown timer can be set from 1 minute to 24 hours.

When the countdown reaches zero, a long beep sounds.

Setting the Timer

1. In Timer Mode, press and hold [A] while the start time is displayed. The start time digits will flash.
2. Press [C] to cycle through the settings: Hours → Minutes → Hours.
3. Use [D] to increase values and [B] to decrease them.
• To set a 24-hour countdown, set the time to "00:00".
4. Press [A] to confirm settings.

Using the Timer

• Press [D] in Timer Mode to start the countdown.
• Press [D] again to stop the countdown.
• You can resume the countdown by pressing [D].
• After stopping, press [A] to reset the timer to its starting value.

Alarm Mode

You can set various daily alarms. The alarm will sound for 20 seconds at the set time.

• If the hourly time signal is enabled, a short beep sounds at the top of each hour.
• If the snooze alarm is enabled, the alarm will repeat every 5 minutes after the initial alarm.

Setting an Alarm

1. In Alarm Mode, press [D] to cycle through alarm types: AL1 → AL2 → AL3 → AL4 → SNZ (Snooze Alarm) → SIG (Hourly Time Signal).
2. After selecting an alarm type, press and hold [A]. The hour digits will flash, indicating they are selected for setting. The alarm is automatically turned on at this point.
3. Press [C] to cycle through the settings: Hours → Minutes → Hours.
4. Use [D] to increase values and [B] to decrease them. Holding a button speeds up the change.
5. The 12/24-hour format matches your current Timekeeping Mode setting.
6. If using the 12-hour format, be careful to set AM/PM correctly.
7. Press [A] to return to Alarm Mode.

Testing Alarm Sound

In Alarm Mode, press [D] to test the alarm sound.

Enabling/Disabling Alarms and Hourly Time Signal

1. In Alarm Mode, press [D] to select the alarm type.
2. After selecting the alarm type, press [A] to turn the selected alarm on ("ON") or off ("OF").
• When any of the 4 alarms is selected, the "AL" indicator appears on the display.
• When the snooze alarm is selected, the "SNZ" indicator appears on the display.
• When the hourly time signal is selected, the "SIG" indicator appears on the display.

Technical Specifications

Accuracy at normal temperature: ±15 seconds per month

Timekeeping Mode: Hours, minutes, seconds, AM/PM indicator. Auto-calendar from 2000 to 2099. 12/24-hour format, DST mode.

Analog Timekeeping Mode: (Not applicable to this module)

Dual Time Mode: Current time in 48 cities worldwide (29 time zones).

Alarm Mode: Daily alarm, hourly time signal, snooze alarm.

Stopwatch Mode: Maximum measuring range 59 minutes 59.99 seconds.

Countdown Timer Mode: Measuring range 1 minute – 24 hours.

Other: Backlight (electro-luminescent panels), adjustable backlight duration, button tone on/off.