Armitron 40/8377DGN
Armitron Sport Digital Chronograph Watch User Manual
Model: 40/8377DGN
1. Introduction
This manual provides detailed instructions for the Armitron Sport Men's 40/8377DGN Digital Chronograph Watch. Please read this manual thoroughly to understand the watch's features and ensure proper operation and longevity.
Key Features:
- Olive green resin case with graphic top ring and LCD display.
- Functions include chronograph, lap time, alarm, dual time, military time, and backlight with three-second delay.
- Equipped with Quartz Movement for accurate timekeeping.
- Water resistant to 100m (330ft), suitable for swimming and snorkeling.
- Comfortable black neoprene strap with hook-and-loop closure.
2. Watch Components
Familiarize yourself with the various parts and buttons of your Armitron Sport watch:

Image 2.1: Front view of the Armitron Sport 40/8377DGN watch, highlighting the digital display and button labels.
- Display: Shows time, seconds, day, and date.
- MODE Button (Left-Bottom): Cycles through different modes (Time, Chronograph, Alarm, Dual Time).
- RESET Button (Left-Top): Used to reset values or adjust settings in various modes.
- ST/STP Button (Right-Top): Starts/stops functions like chronograph or adjusts settings.
- LIGHT Button (Right-Bottom): Activates the backlight for visibility in low light conditions.
3. Initial Setup
Setting Time and Date:
- In Time Mode, press and hold the MODE button until the seconds begin to flash.
- Press the RESET button to cycle through the settings: Seconds > Hour > Minute > Year > Month > Day.
- Use the ST/STP button to adjust the flashing value.
- Press the MODE button again to exit the setting mode.
12/24 Hour Format (Military Time):
While in Time Mode, press the ST/STP button to toggle between 12-hour and 24-hour (military) time formats.
4. Operating Functions
Chronograph (Stopwatch) Mode:
- Press the MODE button repeatedly until 'CHRONO' or 'STW' appears on the display.
- Press ST/STP to start the stopwatch.
- Press ST/STP again to pause the stopwatch.
- Press RESET to clear the stopwatch to zero.
- For Lap Time: While the stopwatch is running, press RESET to display the lap time. The stopwatch continues to run in the background. Press RESET again to return to the running stopwatch display.
Alarm Mode:
- Press the MODE button until 'ALARM' appears.
- Press and hold the RESET button until the hour flashes.
- Use ST/STP to adjust the hour. Press RESET to move to minutes.
- Use ST/STP to adjust the minutes.
- Press MODE to confirm and exit.
- To activate/deactivate the alarm, press ST/STP in Alarm Mode. An alarm icon will appear/disappear.
Dual Time Mode:
This feature allows you to set and view a second time zone.
- Press the MODE button until 'DUAL TIME' or 'T2' appears.
- Press and hold the RESET button until the hour flashes.
- Use ST/STP to adjust the hour. Press RESET to move to minutes.
- Use ST/STP to adjust the minutes.
- Press MODE to confirm and exit.
Backlight:
Press the LIGHT button (Right-Bottom) to illuminate the display for approximately three seconds.
Video 4.1: A 21-second product video showcasing the Armitron Sport Men's 40/8377DGN watch from various angles, demonstrating its design and features.
5. Maintenance and Care
Water Resistance:
Your Armitron Sport watch is water resistant to 100 meters (330 feet). This means it is suitable for swimming and snorkeling. However, it is not suitable for scuba diving. Avoid operating buttons underwater to prevent water ingress.

Image 5.1: Water Resistance Chart, illustrating the capabilities of watches at different depth ratings. This watch is rated for 100m (330ft).
Cleaning:
Wipe the watch case and strap with a soft, damp cloth. For neoprene straps, mild soap and water can be used, but ensure it is thoroughly rinsed and dried.
Battery Replacement:
The watch uses 1 Lithium Metal battery (included). When the display dims or functions become erratic, it may be time for a battery replacement. It is recommended to have the battery replaced by a qualified watch technician to ensure water resistance is maintained.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or dim. | Low battery. | Replace the battery. |
| Time is incorrect. | Time not set properly or accidental button press. | Re-set the time and date as per Section 3. |
| Buttons are unresponsive. | Temporary software glitch or low battery. | Try pressing all buttons simultaneously for a few seconds to reset. If issue persists, replace battery. |
| Water inside the watch. | Buttons pressed underwater or seal compromised. | Immediately take to a qualified watch technician for inspection and repair. Do not attempt to dry it yourself. |
If you encounter issues not listed here or if solutions do not resolve the problem, please contact Armitron customer support.
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | 40/8377DGN |
| Movement | Quartz |
| Case Diameter | 51mm |
| Water Resistance | 100m (330ft) |
| Strap Material | Neoprene |
| Battery Type | 1 Lithium Metal (included) |
| Product Dimensions | 4 x 2.8 x 2.6 inches |
| Item Weight | 4 ounces |
| Country of Origin | China |

Image 7.1: The Armitron Sport 40/8377DGN watch worn on a wrist, providing a visual reference for its size and fit.

Image 7.2: A watch size comparison chart, illustrating different watch diameters to help users understand the 51mm case size of this model in context.
8. Warranty and Support
For information regarding warranty coverage, product registration, or technical support, please refer to the warranty card included with your purchase or visit the official Armitron website. Contact details for customer service are typically available on the manufacturer's website.
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