1. Introduction
Thank you for choosing the Armitron Sport Digital Chronograph Watch, Model 40/8423. This watch is designed for active individuals, offering a blend of functionality and durability. It features a precise quartz movement with a digital multifunctional display, making it suitable for various daily activities. This manual provides comprehensive instructions to help you set up, operate, and maintain your watch effectively.

Figure 1: Front view of the Armitron Sport Digital Chronograph Watch.
2. Key Features
- Digital Multifunctional Display: Provides clear and easy-to-read time, date, and other functions.
- Quartz Movement: Ensures accurate timekeeping.
- Chronograph (Stopwatch): Ideal for timing sports activities or other events.
- Alarm Function: Set daily alarms for reminders.
- Electroluminescent (EL) Backlight: Illuminates the display for visibility in low-light conditions.
- Water Resistance: Rated for 165 feet (50 meters), suitable for short periods of recreational swimming, but not diving or snorkeling.
- Durable Silicone Strap: Comfortable and resilient for everyday wear.
- Date and Day Display: Keeps you informed of the current date and day of the week.
3. Initial Setup
Before using your watch, it is recommended to set the correct time and date. Refer to the buttons labeled on the watch face for 'ADJ' (Adjust), 'MODE', 'START/STOP', and 'EL' (Electroluminescent Light).

Figure 2: Angled view of the watch, highlighting button locations.
3.1 Setting Time and Date
- In normal time display mode, press and hold the MODE button until the seconds begin to flash. This indicates you are in setting mode.
- Press the ADJ button to cycle through the settings: seconds, hours, minutes, year, month, and day.
- Use the START/STOP button to increase the flashing value. For seconds, pressing START/STOP will reset them to zero.
- Once all settings are adjusted, press the MODE button again to exit the setting mode.
3.2 12/24 Hour Format Selection
While in time setting mode (seconds flashing), press the EL button to toggle between 12-hour (AM/PM) and 24-hour (military) time formats.
4. Operating Instructions
4.1 Mode Selection
Press the MODE button repeatedly to cycle through the different functions:
- Normal Time Display
- Chronograph (Stopwatch)
- Alarm Setting
4.2 Using the Chronograph (Stopwatch)
- From normal time display, press MODE until "00:00:00" appears, indicating chronograph mode.
- Press START/STOP to begin timing.
- Press START/STOP again to pause/resume timing.
- To reset the chronograph, press ADJ while the stopwatch is paused.
4.3 Setting the Alarm
- From normal time display, press MODE until the alarm time is displayed (e.g., "AL").
- Press and hold the ADJ button until the alarm hours begin to flash.
- Use the START/STOP button to adjust the hours.
- Press ADJ to move to minutes, then use START/STOP to adjust.
- Press ADJ to move to the alarm ON/OFF setting. Use START/STOP to toggle the alarm on or off.
- Press MODE to exit alarm setting mode.
4.4 Using the EL Backlight
Press the EL button at any time to illuminate the watch display for a few seconds, enhancing visibility in dark environments.
Video 1: A 25-second product showcase of the Armitron Sport Digital Chronograph Watch, demonstrating its design and features.
5. Maintenance
5.1 Cleaning Your Watch
To maintain the appearance of your watch, wipe it regularly with a soft, damp cloth. Avoid using harsh chemicals or abrasive cleaners, as these can damage the watch case or strap.
5.2 Water Resistance
Your watch is water resistant to 165 feet (50 meters). This means it can withstand splashes, rain, and brief immersion in water, such as during recreational swimming. However, it is not suitable for diving, snorkeling, or high-pressure water activities. Do not press any buttons while the watch is submerged in water.

Figure 3: Water Resistance Chart, indicating suitability for various water exposures.
5.3 Battery Replacement
The watch uses 1 product-specific battery (included). When the display dims or functions become erratic, it may be time to replace the battery. It is recommended to have battery replacement performed by a qualified watch technician to ensure proper sealing and maintain water resistance.
6. Troubleshooting
- Display is blank or dim: The battery may be low or depleted. Replace the battery.
- Time is inaccurate: Re-set the time following the instructions in Section 3.1. If the issue persists after battery replacement, contact customer support.
- Buttons are unresponsive: Ensure the watch is not in a locked mode (if applicable, though not a feature of this model). If the issue persists, the watch may require servicing.
- Water inside the watch: Immediately cease use and seek professional servicing to prevent further damage.
7. Specifications
| Feature | Detail |
|---|---|
| Model Name | 40/8423 |
| Display Type | Digital |
| Movement Type | Quartz |
| Case Material | Resin |
| Band Material | Silicone |
| Water Resistance Depth | 165 Feet (50 Meters) |
| Case Diameter | 43.5 Millimeters |
| Case Thickness | 13 Millimeters |
| Band Width | 22 Millimeters |
| Power Source | Battery Powered (1 Product Specific battery included) |
| Additional Features | Alarm, Chronograph, Light Up |
8. Warranty & Support
Your Armitron Sport watch is covered by a manufacturer's warranty. For specific details regarding the warranty period and coverage, please refer to the warranty card included with your purchase or visit the official Armitron website. For customer support, technical assistance, or to inquire about repairs, please contact Armitron customer service through their official channels.
For more information and to explore other Armitron products, visit the Armitron Store on Amazon.





