Introduction
Thank you for choosing the Armitron Sport Men's Digital Chronograph Watch. This manual provides detailed instructions on how to set up, operate, and maintain your new timepiece. Please read this manual thoroughly to ensure proper use and to maximize the features of your watch.
Key Features
- Metallic black resin case and top ring
- LCD display with time, seconds, day, and date
- Functions include: chronograph, lap time, alarm, dual time, military time, and backlight
- Matte black resin strap with buckle closure
- Water-resistant to 330 feet (100M)
Setup
Initial Setup
Upon receiving your watch, it may be in a power-saving mode or require initial time setting. Follow the steps below to activate and set up your watch.

Figure 1: Front view of the Armitron Sport Digital Chronograph Watch.
Setting Time and Date
- Press the MODE button repeatedly until the time setting mode is displayed (usually indicated by flashing digits).
- Use the RESET button to select the digit you wish to adjust (hours, minutes, seconds, year, month, day).
- Use the ST/STP button to increase the selected digit. Hold to rapidly advance.
- Once all settings are correct, press the MODE button to exit the setting mode.
Setting Alarm
- From the normal time display, press the MODE button until the alarm time is displayed.
- Press the RESET button to select the hour or minute digits.
- Use the ST/STP button to adjust the alarm time.
- Press the MODE button to confirm and exit.
- To activate/deactivate the alarm, press the ST/STP button while in alarm mode. An alarm icon will appear/disappear.
Using Backlight (EL)
Press the EL button (usually located on the top right or left side of the watch) to illuminate the display for a few seconds in low-light conditions.

Figure 2: The Armitron Sport Digital Chronograph Watch worn on a wrist, demonstrating its size and fit.
Operating Instructions
Chronograph Function (Stopwatch)
- Press the MODE button until the chronograph (stopwatch) display appears (usually showing 00:00:00).
- Press the ST/STP button to start the stopwatch.
- Press ST/STP again to pause the stopwatch.
- Press the RESET button to reset the stopwatch to zero.
- To record lap times, press the RESET button while the stopwatch is running. The lap time will freeze on the display while the stopwatch continues to run in the background. Press RESET again to return to the running stopwatch.
Dual Time Function
This feature allows you to set and display a second time zone. This is useful for travelers or those who need to keep track of time in different regions.
- Press the MODE button until the dual time display is shown.
- Follow similar steps as setting the main time to adjust the dual time zone.
Military Time (24-Hour Format)
Your watch supports both 12-hour (AM/PM) and 24-hour (military) time formats. To switch between formats, typically you would:
- Enter the time setting mode (as described in 'Setting Time and Date').
- While adjusting the hour, press the ST/STP button to toggle between 12-hour and 24-hour formats. An 'A' or 'P' indicator will appear for 12-hour format, or no indicator for 24-hour format.
Video 1: An official product video showcasing the Armitron Sport Men's 40/8284BLK Digital Chronograph Black Resin Strap Watch. This video provides a general overview of the watch's appearance and features.
Maintenance and Care
Water Resistance
Your Armitron Sport watch is water-resistant to 330 feet (100M). This means it is suitable for swimming and snorkeling, but not for scuba diving. Avoid pressing buttons underwater, as this can compromise the water resistance.

Figure 3: Water Resistance Chart, illustrating the appropriate activities for different water resistance ratings. Your watch is rated for 100M (330FT).
Cleaning
To clean your watch, wipe it with a soft, damp cloth. Do not use harsh chemicals or abrasive materials, as these can damage the resin case and strap.
Battery Replacement
The watch uses 1 Lithium Metal battery (included). When the display dims 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 proper sealing and maintain water resistance.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or dim | Low battery | Replace the battery. |
| Time is incorrect | Time needs to be reset | Follow 'Setting Time and Date' instructions. |
| Buttons are unresponsive | Watch may be in a locked mode or battery is very low | Check manual for button lock feature. Replace battery if necessary. |
| Water inside the display | Water resistance compromised | Immediately take the watch to a qualified technician for repair. Do not attempt to dry it yourself. |
Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 3.8 x 2.6 x 3.3 inches |
| Item Model Number | 40/8284BLK |
| Weight | 4 ounces |
| Batteries | 1 Lithium Metal battery (included) |
| Material | Resin |
| Water Resistance Depth | 100 Meters (330 Feet) |
| Manufacturer | Armitron Sport |
| Country of Origin | China |
Warranty and Support
Armitron watches are manufactured to high-quality standards. For specific warranty information, please refer to the warranty card included with your purchase or visit the official Armitron website. For customer support, technical assistance, or service inquiries, please contact Armitron customer service through their official channels.
You can find more information and support on the Armitron Store on Amazon.





