Introduction
This manual provides detailed instructions for the operation and maintenance of your Armitron Sport Men's Digital Chronograph Watch, model 40/8309. This watch features a digital display with multiple functions including time, date, chronograph, lap time, alarm, dual time, military time, and backlight. Please read this manual thoroughly to ensure proper use and to maximize the lifespan of your watch.
Watch Components
Familiarize yourself with the buttons and display areas of your watch:
- MODE Button: Used to cycle through different operating modes (Time, Chronograph, Alarm, Dual Time).
- RESET Button: Used to reset values or adjust settings during setup.
- ST/STP Button: Used to start/stop functions, such as the chronograph, or to confirm settings.
- EL Button: Activates the Electro-Luminescent backlight for improved visibility in low light conditions.

Initial Setup
Setting Time and Date
- In Time Mode, press and hold the MODE button until the seconds begin to flash. This indicates setup mode.
- Press the RESET button to cycle through the settings: Seconds > Hour > Minute > Year > Month > Date.
- Use the ST/STP button to adjust the flashing value. Hold ST/STP to increase values rapidly.
- Once all settings are correct, press the MODE button to exit setup mode.
12/24 Hour Format
While in Time Mode, press the ST/STP button to toggle between 12-hour (AM/PM indicator) and 24-hour (military time) formats.
Operating Modes
Press the MODE button repeatedly to cycle through the following modes:
- Time Mode: Displays current time, date, and day.
- Chronograph Mode: Stopwatch function.
- Alarm Mode: Set and activate daily alarms.
- Dual Time Mode: Set and view a second time zone.
Chronograph (Stopwatch) Mode
- From Time Mode, press MODE once to enter Chronograph Mode. The display will show '0:00:00'.
- Press ST/STP to start the chronograph.
- Press ST/STP again to stop the chronograph.
- Press RESET to reset the chronograph to '0:00:00'.
- Lap Time: While the chronograph is running, press RESET to record a lap time. The display will show the lap time while the chronograph continues to run in the background. Press RESET again to return to the running chronograph display.
Alarm Mode
- From Time Mode, press MODE twice to enter Alarm Mode. The alarm time will be displayed.
- Press RESET to toggle the alarm ON/OFF. An alarm icon will appear when activated.
- To set the alarm time, press and hold ST/STP until the hour flashes.
- Press RESET to select Hour or Minute.
- Use MODE to adjust the flashing value.
- Press ST/STP to confirm and exit alarm setting.
Dual Time Mode
- From Time Mode, press MODE three times to enter Dual Time Mode.
- Press and hold ST/STP until the hour flashes.
- Press RESET to select Hour or Minute.
- Use MODE to adjust the flashing value.
- Press ST/STP to confirm and exit dual time setting.
Backlight Function
Press the EL button (bottom right) to illuminate the display for approximately 3 seconds. This feature is useful for viewing the time in dark environments.
Maintenance and Care
Proper care will ensure the longevity and performance of your Armitron Sport watch.
- Cleaning: Wipe the watch regularly with a soft, dry cloth. For resin components, a slightly damp cloth can be used, followed by drying.
- Temperature: Avoid exposing the watch to extreme temperatures (hot or cold) or sudden temperature changes, as this can affect accuracy and battery life.
- Chemicals: Keep the watch away from solvents, detergents, perfumes, and cosmetics, which can damage the resin and seals.
Water Resistance
This watch is water resistant to 330 feet (100 meters). This rating means it is suitable for showering, swimming, and snorkeling. It is not recommended for scuba diving. Do not operate any buttons while the watch is submerged in water, as this can compromise the water resistance.

Battery Replacement
The watch is powered by one product-specific battery (included). When the display becomes dim or functions become erratic, it may be time to replace the battery. It is recommended to have the battery replaced by a qualified watch technician to ensure the water resistance seal is properly maintained.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or dim. | Low battery. | Replace the battery. |
| Time is incorrect. | Time not set correctly or accidental adjustment. | Refer to 'Setting Time and Date' section to reset the time. |
| Buttons are unresponsive. | Watch may be in a locked state or battery is very low. | Try pressing all buttons firmly. If issue persists, replace battery. |
| Water inside the watch. | Water resistance compromised (e.g., buttons pressed underwater). | Immediately take the watch to a professional for inspection and repair to prevent further damage. |
Specifications
- Model Number: 40/8309
- Display Type: Digital LCD
- Case Material: Resin
- Strap Material: Resin
- Functions: Time (12/24 hr), Seconds, Day, Date, Chronograph, Lap Time, Alarm, Dual Time, Backlight
- Water Resistance: 330 feet (100 meters)
- Battery: 1 Product Specific battery (included)
- Approximate Dimensions: 4.61 x 3.78 x 3.03 inches (packaged)
- Approximate Weight: 5.4 ounces (packaged)

Warranty and Support
Armitron watches are manufactured to high standards. For information regarding warranty coverage, service, or support, please refer to the warranty card included with your purchase or visit the official Armitron website. Keep your proof of purchase for any warranty claims.
For further assistance, you may contact Armitron customer service through their official channels. Always provide your watch model number (40/8309) when seeking support.


