Introduction
This manual provides detailed instructions for the setup, operation, and maintenance of your Timex Men's Ironman Triathlon Classic 30 38mm Watch. Designed for durability and functionality, this watch is equipped with features essential for active lifestyles, including a chronograph, countdown timer, multiple alarms, and Indiglo night-light.

Front view of the Timex Men's Ironman Triathlon Classic 30 38mm Watch, showcasing its digital display and button layout.
Key Features
- Adjustable black 16 millimeter resin strap, fitting up to an 8-inch wrist circumference.
- 100-hour chronograph with 30-lap memory for tracking performance.
- 24-hour countdown timer with easy forward or backward setting.
- Three daily, weekday, or weekend alarms for versatile reminders.
- 24-hour military time mode and three time zones for global convenience.
- Day, date, and month calendar display.
- Gray and black 38 millimeter resin case with a durable acrylic lens.
- Gray digital display for clear readability.
- Indiglo light-up watch dial for visibility in low-light conditions.
- Water resistant to 100 meters (330 feet), suitable for swimming and snorkeling.
Watch Overview
The Timex Ironman Triathlon Classic 30 features a robust design with clearly labeled buttons for easy navigation and function access.

Angled front view of the watch, highlighting the display and the 'START/SPLIT' and 'STOP/RESET' buttons.
Button Functions:
- MODE: Cycles through watch modes (Time, Chronograph, Timer, Alarm).
- SET/RECALL: Used to enter setting mode or recall lap memory.
- INDIGLO: Activates the Indiglo night-light.
- STOP/RESET: Stops the chronograph or timer, or resets values in setting mode.
- START/SPLIT: Starts the chronograph or timer, or records a lap/split time.
Setup Instructions
Setting Time and Date:
- From the Time mode, press and hold the SET/RECALL button until the display flashes.
- Press MODE to cycle through the settings (seconds, hour, minute, year, month, day).
- Use the START/SPLIT or STOP/RESET buttons to adjust the flashing value.
- Once all settings are correct, press SET/RECALL to exit setting mode.
Setting Alarms:
- Press MODE until you reach the Alarm mode (indicated by an alarm icon).
- Press and hold SET/RECALL to enter alarm setting mode.
- Use MODE to select the alarm (AL1, AL2, AL3) and then adjust hour and minute using START/SPLIT or STOP/RESET.
- You can also set alarm frequency (daily, weekday, weekend) in this mode.
- Press SET/RECALL to save and exit.
Operating Instructions
Using the Chronograph:
- Press MODE to navigate to the Chronograph mode.
- Press START/SPLIT to begin timing.
- Press START/SPLIT again to record lap/split times (up to 30 laps).
- Press STOP/RESET to pause the chronograph. Press again to resume or hold to reset to zero.
- To recall lap memory, press SET/RECALL while in Chronograph mode.
Using the Countdown Timer:
- Press MODE to navigate to the Timer mode.
- Press and hold SET/RECALL to set the desired countdown time. Adjust hours, minutes, and seconds using START/SPLIT or STOP/RESET.
- Press SET/RECALL to save.
- Press START/SPLIT to begin the countdown.
- The timer will beep when it reaches zero. Press STOP/RESET to silence and reset.
Using Indiglo Night-Light:
Press the INDIGLO button (top right) at any time to illuminate the watch display for a few seconds, enhancing visibility in low-light conditions.
Care and Maintenance
Water Resistance:
Your Timex Ironman watch is water resistant to 100 meters (330 feet). This makes it suitable for swimming, showering, and snorkeling. It is not recommended for scuba diving or high-impact water sports where water pressure may exceed the rating.

Close-up of the watch's stainless steel back, indicating 'WATER RESISTANT 100 METERS' and 'CR2025 BATTERY'.
Do not press any buttons while the watch is submerged in water, as this can compromise the water resistance seal.
Battery Replacement:
The watch uses one CR2025 Lithium Metal battery. 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.
Cleaning:
Clean your watch regularly with a soft, damp cloth. For stubborn dirt, a mild soap solution can be used, followed by rinsing with clean water and thorough drying. Avoid harsh chemicals or abrasive materials that could damage the watch case or strap.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is dim or blank. | Low battery. | Replace battery (CR2025). |
| Buttons are unresponsive. | Watch may be in a locked mode or internal issue. | Try pressing all buttons firmly. If issue persists, a battery reset may be needed by a professional. |
| Water inside the watch. | Seal compromised or buttons pressed underwater. | Immediately take to a qualified watch repair center to prevent further damage. |
| Time is inaccurate. | Battery low or watch needs to be reset. | Replace battery or follow time setting instructions. |
Specifications
- Model Number: T5E901SU
- Case Material: Resin
- Case Diameter: 38 mm
- Lens Material: Acrylic
- Strap Material: Resin
- Strap Width: 16 mm
- Water Resistance: 100 meters (330 feet)
- Battery Type: CR2025 Lithium Metal (included)
- Functions: 100-hour Chronograph (30-lap memory), 24-hour Countdown Timer, 3 Alarms, 3 Time Zones, 24-hour Military Time, Day/Date/Month Calendar, Indiglo Night-Light
- Product Dimensions: Approximately 6 x 6 x 6 inches; 0.8 ounces
Warranty and Support
Timex provides a limited warranty for its watches. For specific warranty details, please refer to the warranty card included with your purchase or visit the official Timex website. For additional support, frequently asked questions, or to download the official user manual in PDF format, please visit the Timex support page or the product's Amazon page.
Official User Manual (PDF): Download Here
Timex Official Store: Visit Timex Store on Amazon





