Armitron 40/8397YLW
Armitron Sport Digital Chronograph Watch
Model: 40/8397YLW | Brand: Armitron
Introduction
This manual provides detailed instructions for the setup, operation, and maintenance of your Armitron Sport Men's Digital Chronograph Resin Strap Watch, Model 40/8397YLW. Please read this manual thoroughly to ensure proper use and to maximize the lifespan of your watch.

Front view of the Armitron Sport Digital Chronograph Watch, featuring a yellow resin case and strap with a black textured top ring and LCD display.
Key Features
- Durable Construction: Black resin case with textured top ring and a comfortable yellow resin strap with buckle closure.
- Digital Display: LCD display showing time, seconds, day, and date.
- Multiple Functions: Includes chronograph, lap time, alarm, dual time, military time, and backlight.
- Accurate Timekeeping: Powered by reliable Quartz Movement.
- Water Resistance: Water-Resistant to 100 meters (330 feet), suitable for swimming and snorkeling.
Setup Guide
Setting Time and Date
- Press the MODE button (usually bottom left) repeatedly until the time setting mode is displayed (often indicated by flashing digits).
- Use the RESET button (usually top left) to select the digit you wish to adjust (e.g., hours, minutes, year, month, day).
- Use the ST/STP button (usually top right) to increase the selected digit. Hold to rapidly advance.
- Once all settings are correct, press the MODE button to exit the setting mode and return to normal time display.

The Armitron Sport Digital Chronograph Watch comfortably worn on a wrist, showcasing its digital display.
Operating Functions
Chronograph (Stopwatch)
- Press MODE until "CHRONO" or "STW" appears on the display.
- Press ST/STP to start the stopwatch.
- Press ST/STP again to stop the stopwatch.
- Press RESET to reset the stopwatch to zero.
- For lap time, press RESET while the stopwatch is running to display the lap time. Press RESET again to return to running time.
Alarm Setting
- Press MODE until "ALARM" or "AL" appears.
- Press RESET to select hours or minutes.
- Use ST/STP to adjust the alarm time.
- Press MODE to confirm and exit.
- To activate/deactivate the alarm, press ST/STP while in alarm mode. An alarm icon will appear/disappear.
Backlight
Press the EL button (usually bottom right) to illuminate the display for easy viewing in low-light conditions. The backlight will typically stay on for a few seconds.
Maintenance and Care
- Cleaning: Wipe the watch case and strap regularly with a soft, damp cloth. Avoid harsh chemicals or abrasive materials.
- Battery Replacement: When the display dims or functions become erratic, the battery may need replacement. This should be performed by a qualified watch technician to ensure water resistance is maintained.
- Storage: Store your watch in a cool, dry place away from direct sunlight and extreme temperatures.
- Impact: While durable, avoid dropping the watch or subjecting it to severe impacts, which can damage internal components.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or dim. | Low battery. | Replace the battery. Consult a professional. |
| Buttons are unresponsive. | Watch may be in a locked mode or internal issue. | Try pressing all buttons simultaneously for a few seconds to reset. If issue persists, seek professional service. |
| Time is inaccurate. | Incorrect time setting or low battery. | Re-set the time. If problem continues, replace battery. |
| Condensation inside the watch. | Water resistance compromised. | Immediately take the watch to a qualified technician for inspection and repair to prevent further damage. |
Water Resistance Information
Your Armitron Sport watch is designed with a water resistance rating of 100 meters (330 feet). This rating indicates its suitability for various water activities, but it is important to understand the limitations.

This chart illustrates different levels of water resistance for watches. The Armitron Sport watch is rated for 100M (330FT), making it suitable for swimming and snorkeling, but not for scuba diving.
- 100M (330FT) Water Resistance: Generally suitable for swimming, showering, and snorkeling.
- Important Note: Do not operate the watch buttons while submerged in water, as this can compromise the water seal. Avoid exposing the watch to hot water or steam, which can also affect the seals.
Specifications
- Model Number: 40/8397YLW
- Case Diameter: 52.5 millimeters
- Material: Resin (Case and Strap)
- Movement: Quartz
- Battery: 1 Lithium Metal battery (included)
- Water Resistance Depth: 100 Meters (330 Feet)
- Manufacturer: Armitron Sport
- Package Dimensions: 4.06 x 3.82 x 2.95 inches
- Item Weight: 4 ounces
Warranty and Support
For detailed warranty information and customer support, please refer to the official Armitron warranty document.
For further assistance, please contact Armitron customer service through their official website or contact information provided in the warranty document.
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