Casio Watch User Manual
Models: AMW-320, AQ-426
Modules: 305, 307, 309, 314, 315, 358, 364, 388, 739
IMPORTANT INFORMATION BEFORE USE
Battery: The battery installed at the factory may discharge during delivery and storage. When the first signs of insufficient power appear (dimming display), replace the battery at your nearest dealer or a CASIO distributor.
Water Resistance
Watches are classified by water resistance rating (from I to V) according to their resistance to water. Refer to the table below to determine the correct usage for your watch.
| Rating | Case Marking | Splash, Rain, Washing | Swimming, Light Diving | Underwater Diving | Scuba Diving |
|---|---|---|---|---|---|
| I | WATER RESISTANT | Yes | No | No | No |
| II | 50 M WATER RESISTANT | Yes | Yes | No | No |
| III | 100 M WATER RESISTANT | Yes | Yes | Yes | No |
| IV | 200 M WATER RESISTANT | Yes | Yes | Yes | Yes |
| V | 300 M WATER RESISTANT | Yes | Yes | Yes | Yes |
Notes:
- Watches are not waterproof.
- Do not pull out the crown when your watch is wet.
- Do not press buttons or pull out the crown while your watch is underwater.
- Buttons can be pressed once underwater without re-pressing, but the crown should not be pulled out. If your watch is exposed to salt water, rinse it thoroughly with fresh water and wipe it dry.
- Watches can be used for scuba diving (excluding depths requiring a helium-oxygen gas mixture). Do not pull out the crown while your watch is underwater.
- Some water-resistant watches feature leather straps. Do not wear these models while swimming or engaging in other activities where the strap may be submerged in water.
Care for Your Watch
- Never attempt to open the case or remove the back cover yourself.
- The gasket that protects the watch from water and dust should be replaced every 2-3 years.
- If moisture enters the inside of the watch, have it checked immediately by your nearest dealer or a CASIO distributor.
- Do not expose your watch to extreme temperatures.
- While designed for normal use, avoid rough handling and dropping your watch.
- Do not fasten the strap too tightly. You should be able to fit a finger between your wrist and the strap.
- To clean your watch and strap, use a piece of dry, soft cloth, or a soft cloth dampened with a mild neutral detergent solution. Never use volatile agents such as gasoline, solvents, spray cleaners, etc.
- When not in use, store your watch in a dry place.
- Avoid exposing your watch to gasoline, cleaning solvents, spray aerosols, adhesives, paint, etc. Chemical reactions with these materials can damage gaskets, cases, and polished surfaces.
- Some watches have silk-screened images on their straps. Be careful when cleaning these straps to avoid damaging the designs.
For Watches with Rubber Straps:
- A white powdery substance may appear on the strap. This substance is harmless to your skin or clothing and can be easily removed by wiping with a cloth.
- Exposure of the rubber strap to sweat or moisture, or storage in high humidity conditions, can lead to damage, tearing, or cracking. To ensure a long service life for the rubber strap, wipe it clean of dirt and water with a soft cloth whenever possible.
WATCH DIAL EXPLANATION
The procedures for operating the combination analog-digital watches for modules No. 305, 307, 309, 314, 315, 358, 364, 388, and 739 are identical. The watches shown in the figures of this manual are depicted as in Figure 1 below.
Analog Display: Hour hand, Minute hand, Second hand, Elapsed time bezel. Digital Display: Shows time, date, and day of the week.
The elapsed time bezel can be used to track the passage of time. Rotate the bezel so that its mark aligns with the minute hand. As the minute hand moves, you can see how much time has passed.
Digital Display Elements:
- Current Time: Displays hours, minutes, and seconds.
- AM/PM Indicator: Appears for 12-hour format.
- Month, Day: Displays the current month and day.
- Day of Week: Displays the day of the week. Abbreviations are: SU (Sunday), MO (Monday), TU (Tuesday), WE (Wednesday), TH (Thursday), FR (Friday), SA (Saturday).
SETTING THE CURRENT TIME ON THE DIGITAL DISPLAY
To set the current time on the digital display:
- Press and hold button "B" in the timekeeping mode to set the current time.
- Press button "A" simultaneously with the start of the next minute to adjust the second count.
- Press button "B" to advance to the next digit to be set. The digits to be adjusted will flash.
- Pressing button "A" increments the flashing digits by one. Holding button "A" allows for high-speed adjustment.
- Pressing button "A" also toggles between 12-hour and 24-hour formats.
- Press button "B" to complete the operation.
(Auto-return function): If no button is pressed for approximately 2-3 minutes, the watch automatically returns to the timekeeping mode.
SETTING THE CURRENT TIME ON THE ANALOG DIAL
- When the second hand reaches the "12 o'clock" position, stop it by pulling out the crown.
- Set the hands by rotating the crown.
- Push the crown back in at the moment the time you set is reached.
- Due to the watch's construction, the set time may shift forward or backward by up to one second.
SETTING THE CALENDAR
To set the calendar:
- Press and hold button "B" in the calendar mode to set the current calendar settings.
- Pressing button "A" increments the flashing digits by one. Holding button "A" allows for high-speed adjustment.
- Press button "B" to advance to the next digit to be set. The digits to be adjusted will flash.
- Press button "B" to complete the operation.
SETTING THE TIME FOR DAILY ALARMS
If a daily alarm is set, the alarm will sound for 20 seconds at the specified time each day until the settings are cleared. Press button "B" to stop the alarm sound while it is sounding. If the hourly chime is set, the watch will chime at the start of each hour.
- Press and hold button "B" in the daily alarm mode to set the alarm time.
- Pressing button "A" increments the flashing digits by one. Holding button "A" allows for high-speed adjustment.
- Press button "B" to advance to the next digit to be set. The digits to be adjusted will flash.
- Pressing button "A" toggles the alarm and hourly chime settings on and off.
- Press button "B" to complete the operation.
If the watch is set to 24-hour format, the alarm time will also be displayed in 24-hour format.
(Auto-return function): If no button is pressed for approximately 2-3 minutes while setting the alarm time, the watch automatically returns to the daily alarm mode.
SETTING VALUES IN DUAL TIME MODE
To set the dual time:
- Press and hold button "B" in the dual time mode to set the second time zone.
- Pressing button "A" increments the flashing digits by one. Holding button "A" allows for high-speed adjustment.
- Press button "B" to advance to the next digit to be set. The digits to be adjusted will flash.
- Pressing button "A" toggles between 12-hour and 24-hour formats.
- Press button "B" to complete the operation.
(Auto-return function): If no button is pressed for approximately 2-3 minutes, the watch automatically returns to the timekeeping mode.
STOPWATCH OPERATIONS
Press button "B" to start or stop the stopwatch. Press and hold button "B" to reset the stopwatch. Starting and stopping the stopwatch is confirmed by a beep.
Operating Range: The stopwatch measurement range is 59 minutes 59.9 seconds (for modules No. 364, 388, 739, it is 59 minutes 59.99 seconds). If the time exceeds this, it will reset and restart automatically.
TECHNICAL SPECIFICATIONS
- Accuracy: ±15 seconds per month at normal temperature.
- Watch Capabilities:
- Current time mode
- Analog display: Hour, minute, and second hands
- Digital display: Hours, minutes, seconds, AM/PM indicator, month, day, day of week
- Display format: Switchable between 12-hour and 24-hour formats
- Calendar mode: Auto-calendar set for 28 days in February
- Stopwatch Function:
- Maximum measurement range: 59 minutes 59.9 seconds (for modules No. 305, 307, 309, 314, 315, 358); 59 minutes 59.99 seconds (for modules No. 364, 388, 739)
- Unit of measurement: 0.1 seconds (for modules No. 305, 307, 309, 314, 315, 358); 0.01 seconds (for modules No. 364, 388, 739)
- Measurement modes: Elapsed time and split time
- Alarm: Daily alarm
- Hourly Chime: Yes
- Dual Time: Yes
- Battery:
- Module Number | Battery Type | Approx. Battery Life*
- 305 | N 396 | Approx. 15 months
- 307, 314, 315, 364, 388, 739 | N 370/SR920W | Approx. 2 years
- 309 | N 392/SR1120W | Approx. 2 years
- 358 | SR927W | Approx. 2 years
*Based on 20 seconds of alarm operation per day.
NOTE: It is impossible to damage the watch or impair its operation by pressing buttons incorrectly. If non-standard information appears on the watch, it means the button press sequence was incorrect. Please read this manual again and try once more.
PRODUCT INFORMATION
| Item | Details |
|---|---|
| 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. Suchevskaya, d.27, str. 1, Russia |
| Country of Origin: | Japan |
| Warranty Period: | 1 year |
| Address of Authorized Organization for Claims: | Specified in the warranty card |
Product conforms to GOST 26270-98 (cl.4.35)
Certificate of Conformity No. РОСС JP. АЯ 46.Д00003
