Casio BG-153/166/178/188/189 Watch User Manual

Important Information

Please read this important information before use.

Battery

The battery installed at the factory should be replaced immediately if it shows signs of insufficient power (e.g., dim display, backlight not working) by an authorized CASIO dealer or distributor.

Water Resistance

Watches are classified by water resistance levels (I to V). Refer to the table below to understand your watch's rating for proper use.

Notes for relevant sections:

• Level I: The watch is not water-resistant. Avoid any contact with moisture.
• Level II: Do not pull out the crown while the watch is wet.
• Level III: Do not press the watch buttons underwater.
• Level IV: If the watch is exposed to saltwater, rinse it thoroughly and dry it.
• Level 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 for swimming or any activity where the strap may be immersed in water.

Care of Your Watch

• Never attempt to open the case or remove the back cover.
• The water-resistant packing should be replaced every 2-3 years.
• If moisture enters the watch, have it checked immediately by an authorized CASIO dealer or distributor.
• Do not expose the watch to extreme temperatures.
• While designed for normal use, avoid rough handling and dropping the watch.
• Strap Adjustment: Do not fasten the strap too tightly. A finger should fit between your wrist and the strap.
• Cleaning: Use a dry, soft cloth, or a soft cloth dampened with a mild neutral detergent solution. Never use volatile substances such as benzine, solvents, or spray cleaners.
• Storage: When not in use, store the watch in a dry place.
• Avoid contact with benzine, cleaning solvents, spray aerosols, adhesives, paint, etc. Chemical reactions from these materials can damage gaskets, the case, and the watch's polish.
• Some models feature screen-printed designs on the strap. Clean these straps carefully to avoid damaging the designs.

For Watches with Plastic Straps:

• A white powdery substance may appear on the strap. This is harmless and can be easily removed by wiping with a cloth.
• Sweat or moisture, or storage in high humidity, can damage, tear, or crack plastic straps. To ensure a long service life, wipe the strap dry after exposure to sweat or water.

For Watches with Fluorescent Cases and Straps:

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

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

General Mode Description

The diagram shows the watch in the Timekeeping Mode. Press button "C" to switch between modes. The watch features the following modes: Timekeeping, Data Bank, Day Counter, Alarm, Stopwatch, Dual Time. The display typically shows the current time (Hour:Minute:Second) and date (Month-Day), along with indicators for Day of Week and PM. Buttons are labeled A, B, C, D.

Timekeeping Mode

Setting Time and Date:

1. In Timekeeping Mode, press button "A". The seconds digits will flash.
2. Press button "C" to cycle through the settings in the following order: Seconds -> DST -> Hour -> Minute -> Year -> Month -> Day -> Seconds.
3. While the seconds digits are flashing, press button "D" to reset the seconds to "00". If the seconds are between "30" and "59", the minutes will be incremented by 1. If the seconds are between "00" and "29", the minutes will remain unchanged.
4. To adjust other values (except seconds), use button "D" to increase and button "B" to decrease. Holding the buttons down allows for faster adjustment.
5. To set Daylight Saving Time (DST), press button "D" to toggle it on or off. The "DST" indicator appears when DST is on.
6. After completing the time and date settings, press button "A" to return to the Timekeeping Mode.

The day of the week is set automatically according to the date. The date can be set from January 1, 2000, to December 31, 2039. Backlight: Press button "B" to illuminate the display for three seconds. The backlight uses EL elements. Frequent use of the backlight will reduce battery life.

Data Bank Mode

This mode allows you to store up to 25 entries, each consisting of a name (up to 8 characters) and a phone number (up to 12 characters).

Entering Data:

1. In Data Bank Mode, press button "D" until an empty slot appears. If no empty slots are available, you must delete an old entry to make space.
2. Press and hold button "A". A cursor will appear in the text area.
3. Enter characters for the name using buttons "B" and "D". Characters change in the following sequence: [0-9] -> [Space] -> [A-Z]. Press "C" to move the cursor to the next character position.
4. Enter the name (up to 8 characters). Press "C" to move the cursor to the number area.
5. Enter the phone number (up to 12 characters) using buttons "B" and "D" to select characters, and "C" to move to the next position.
6. Press button "A" to save the data. The display will show "SORT" for a few seconds.

Viewing Data: In Data Bank Mode, press button "D" to scroll through entries. Holding button "D" allows for faster scrolling.

Editing Data: Scroll to the entry you wish to edit. Press "A" to activate the cursor in the text area. Use "C" to move the cursor to the character you want to change. Use "B" and "D" to change the character. Press "A" to save the changes and return to Data Bank Mode.

Deleting Data: Scroll to the entry you wish to delete. Press "A" to activate the cursor. Press and hold buttons "B" and "D" simultaneously to delete the entry. The display will show "CLR", indicating deletion. Press "A" to return to Data Bank Mode.

Day Counter Mode

This mode counts the number of days from the current date to a set target date. You can store up to 5 entries.

Setting a Target Date:

1. In Day Counter Mode, press button "D" to select the counter you wish to set.
2. Press button "A" until the cursor flashes on the display.
3. Press button "C" to cycle through the settings: Day -> Month -> Year.
4. When the cursor is in the text zone, use buttons "D" or "B" to select characters (A-Z, 0-9, Space).
5. When the cursor is in the date zone, use button "D" to increase and button "B" to decrease the value.
6. To delete an entry, press and hold buttons "D" and "B" simultaneously. "CLR" will appear, and the current date will be set in the date zone.
7. After setting, press button "A".

The target date can be set from January 1, 1940, to December 31, 2039. The display may show only 3 characters; scroll left to view the full entry.

Alarm Mode

You can set a daily alarm that sounds for 20 seconds when the set time is reached. Press any button to stop the alarm. An hourly time signal provides a short beep at the start of each hour.

Setting Alarm Time:

1. In Alarm Mode, press button "A" to begin setting. The hour digits will flash.
2. Use button "C" to move between the adjustable values: Hour -> Minute.
3. Use button "D" to increase and button "B" to decrease the value. Holding the buttons allows for faster adjustment.
4. Press "A" to save the alarm time settings.

Enabling/Disabling Alarms and Hourly Signal: In Alarm Mode, press button "D" to cycle through the following settings:

• Both ON: Daily alarm and hourly time signal are active.
• Both OFF: Both are deactivated.
• Daily Alarm Only: Only the daily alarm is active.
• Hourly Time Signal Only: Only the hourly time signal is active.

Testing the Alarm: Press and hold button "D" in Alarm Mode to test the alarm sound.

Stopwatch Mode

The stopwatch measures elapsed time, lap times, and split times. The measurement range is up to 23 hours, 59 minutes, 59.99 seconds, with an accuracy of 1/100 second. Press button "B" for the backlight.

Measuring Elapsed Time: Press "A" (Start) -> "B" (Stop) -> "B" (Reset).

Measuring Lap/Split Times: Press "A" (Start) -> "B" (Lap/Split) -> "B" (Continue) -> "A" (Stop) -> "B" (Reset).

Measuring Dual Finish Times: Press "A" (Start) -> "B" (1st Finish) -> "B" (2nd Finish) -> "A" (Stop) -> "B" (Reset).

Dual Time Mode

This mode allows you to view the time in a different time zone.

Setting Dual Time: Press button "D" to advance the time by 30 minutes, or button "B" to decrease it by 30 minutes. Press button "A" to set the current time as the dual time.

The 12/24 hour format selected in the Timekeeping Mode is also applied to the Dual Time Mode.

Technical Specifications

• Accuracy: ±15 seconds per month under normal temperature conditions.
• Timekeeping Display: Hour, minute, second, AM/PM indicator, year, month, day, day of week.
• Time Display Format: Switchable between 12-hour and 24-hour formats.
• Calendar: Auto-calendar with settings from the year 2000 to 2039.

Product Information

Product Name: Electronic / Electro-mechanical Quartz Wristwatches (Men/Women)

Brand: CASIO

Manufacturer: 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

Authorized Service Organization for 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