Introduction
This manual provides detailed instructions for setting up, operating, and maintaining your Timex Men's Ironman Triathlon Classic 100 44mm Watch. Designed for performance and durability, this digital watch features a 100-hour chronograph, 100-lap memory, interval timers, and Indiglo night-light technology. Please read these instructions carefully to ensure proper use and longevity of your timepiece.

Figure 1: Front view of the Timex Men's Ironman Triathlon Classic 100 Watch.
Setup
Setting Time and Date
- Enter Set Mode: Press and hold the SET/RECALL button (top-left) until the display shows "HOLD TO SET" and then enters the setting mode.
- Adjust Values: Use the START/SPLIT button (bottom-right) to increase the flashing value (e.g., hour, minute, year). Use the STOP/RESET button (bottom-left) to decrease the flashing value.
- Navigate Settings: Press the MODE button (bottom-left) to move between different settings (e.g., hours, minutes, AM/PM, year, month, day).
- Exit Set Mode: Once all settings are adjusted, press the SET/RECALL button (top-left) to save and exit the setting mode.
Activating Night-Mode and FLIX Technology
The Timex FLIX technology allows you to activate the INDIGLO night-light with a simple wrist flick. To use this feature:
- Activate Night-Mode: Press and hold the INDIGLO button (top-right) for three seconds until the watch beeps. This indicates Night-Mode is active.
- Use FLIX: With Night-Mode active, a firm forward flick of your wrist with a sharp stop will illuminate the night-light for 5 seconds. This requires a deliberate motion to prevent accidental activation.

Figure 2: Side view illustrating button placement for setting and operation.
Operating Features
Chronograph Function
The watch features a 100-hour chronograph with lap or split options and a 100-lap memory recall.
- Start/Stop: Press the START/SPLIT button to begin timing. Press it again to pause.
- Split/Lap: While the chronograph is running, press START/SPLIT to record a split time or lap time.
- Reset: With the chronograph stopped, press the STOP/RESET button to clear the timer.
- Memory Recall: Use the SET/RECALL button to access stored lap times.
Interval Training Timer
The watch includes 9 interval timers, settable up to 24 hours, with countdown/stop and countdown/repeat options.
- Access: Navigate to the timer mode using the MODE button.
- Set Intervals: Use the SET/RECALL button to configure individual interval durations and repeat settings.
- Start/Stop: Use the START/SPLIT button to begin or pause the interval timer.
Alarms
Set up to 5 customizable alarms for daily reminders or wake-up calls.
- Access: Cycle through modes with the MODE button until you reach the alarm setting.
- Set Alarm: Use the SET/RECALL and START/SPLIT buttons to set the desired alarm time.
- Activate/Deactivate: Toggle the alarm on or off within the alarm setting mode.
Indiglo Night-Light
The Indiglo night-light uniformly illuminates the watch dial for clear visibility in low-light conditions. Press the INDIGLO button (top-right) to activate it. Refer to the FLIX technology section for automatic activation.
Product Overview Videos
Timex Ironman Classic 100 Overview
This video provides a general overview of the Timex Men's TW5M03400 Ironman Classic 100 Full-Size Black/Green Resin Strap Watch, highlighting its design and key features.
Ironman Classic and Rugged Men
This video showcases the Timex Ironman Classic watch, emphasizing its ruggedness and suitability for active lifestyles.
Maintenance
Cleaning Your Watch
To maintain the appearance of your watch, clean it regularly with a soft, damp cloth. Avoid using harsh chemicals or abrasive materials, which can damage the resin case and strap.
Battery Replacement
The watch requires 1 Lithium Metal battery (included). When the battery needs replacement, it is recommended to have it done by a qualified technician to ensure the water resistance seal is properly maintained. Improper battery replacement can compromise the watch's water resistance.

Figure 3: Detail of the watch strap and buckle.
Troubleshooting
- Display is blank or dim: The battery may be low or depleted. Replace the battery.
- Buttons are unresponsive: Ensure the watch is not in a locked mode. If the issue persists, a soft reset (removing and reinserting the battery) might be necessary, but this should be done by a professional to preserve water resistance.
- Time is inaccurate: Re-set the time and date as per the "Setting Time and Date" section. If inaccuracy continues, the watch may require servicing.
- Indiglo not working: Check if Night-Mode is activated. If not, activate it by holding the INDIGLO button for 3 seconds. If still not working, the battery may be too low to power the light.
Specifications
| Feature | Detail |
|---|---|
| Model Number | TW5M03400 |
| Case Material | Resin |
| Strap Material | Resin |
| Case Diameter | 44mm |
| Water Resistance | 100 meters (330 feet) - Suitable for snorkeling and swimming, but not diving. |
| Chronograph | 100-hour with 100-lap memory |
| Timers | Interval training timer (9 timers, up to 24 hours), 24-hour countdown timer |
| Alarms | 5 customizable alarms |
| Illumination | Indiglo light-up watch dial with Night-Mode and FLIX technology |
| Battery | 1 Lithium Metal battery (included) |
Warranty and Support
Your Timex watch is covered by a manufacturer's warranty against defects in materials and workmanship. For specific warranty terms, service, or support, please refer to the warranty card included with your purchase or visit the official Timex website. Keep your proof of purchase for warranty claims.
For additional assistance, you may contact Timex customer service through their official channels.





