1. Introduction
The Oregon Scientific SmartHeart SE102 is an entry-level heart rate monitor designed to assist users in tracking their fitness levels. This device provides basic heart rate measurements and calculates calories burned during exercise. It includes a wrist-worn watch unit and a chest belt transmitter for accurate heart rate detection.
The chest belt transmitter is designed to be worn comfortably against the skin, where it detects heart signals and transmits them wirelessly to the watch unit. The watch then displays the heart rate information. Key features include programmable upper and lower heart rate zone alarms, which can provide visual or vibrating alerts, and a Tap on Lens (TOL) function for easy access to certain features. The monitor also offers a silent mode, key lock, buzzer (beep tone), and low battery detection to enhance user experience.
2. Package Contents
Please verify that all items are present in the package:
- Oregon Scientific SmartHeart SE102 Heart Rate Monitor Watch
- Chest Belt Transmitter
- User Manual (this document)
If any items are missing or damaged, please contact customer support.
3. Product Overview
The SmartHeart SE102 system consists of two primary components: the wrist-worn monitor watch and the chest belt transmitter. Understanding each component's function is essential for proper use.

Figure 1: Oregon Scientific SmartHeart SE102 Heart Rate Monitor in its retail packaging. The image displays the black heart rate monitor watch and the black chest belt transmitter. The packaging highlights features such as 'Vibration Alert and Tap-On Lens', and its ability to monitor fitness levels, heart rate readings, calculate calories burned, and alert users when target heart rate zones are exceeded. The Oregon Scientific logo is prominently displayed.
3.1. Heart Rate Monitor Watch
- Display: Shows heart rate, time, date, and other relevant data.
- Buttons: Used for navigation, setting adjustments, and mode selection.
- Tap on Lens (TOL): Allows quick access to certain functions by tapping the watch face.
- Alarm: Provides visual or vibrating alerts for heart rate zones and other notifications.
3.2. Chest Belt Transmitter
- Electrodes: Two conductive pads that detect electrical signals from the heart.
- Transmitter Unit: Sends heart rate data wirelessly to the monitor watch.
- Adjustable Strap: Ensures a secure and comfortable fit around the chest.
4. Setup
4.1. Installing Batteries
Both the watch unit and the chest belt transmitter require batteries for operation. Refer to the battery compartment covers on each device for specific battery types and installation instructions. Ensure correct polarity when inserting batteries.
4.2. Wearing the Chest Belt Transmitter
- Moisten the electrode areas on the back of the chest belt with water or electrode gel to ensure good contact with the skin.
- Position the chest belt directly against your skin, just below your pectoral muscles. The Oregon Scientific logo on the transmitter should be centered on your chest.
- Adjust the strap to ensure a snug but comfortable fit. The belt should not restrict breathing or movement.
4.3. Wearing the Monitor Watch
Wear the monitor watch on your wrist like a standard wristwatch. Ensure it is secure but not overly tight, allowing for comfortable movement.
4.4. Initial Pairing (Automatic)
The SmartHeart SE102 system is designed for automatic pairing. Once both the watch and chest belt have batteries installed and the chest belt is worn correctly, the watch should automatically detect and display your heart rate within a few seconds. If no heart rate is displayed, ensure the chest belt electrodes are sufficiently moistened and making good skin contact.
5. Operating Instructions
5.1. Basic Heart Rate Monitoring
Once the chest belt is worn and the watch is active, your current heart rate will be displayed on the watch screen. The heart rate is typically shown in beats per minute (BPM).
5.2. Setting Heart Rate Zones
The SE102 allows you to define upper and lower heart rate zones. When your heart rate falls outside these zones, the watch can provide an alert.
- Access the settings menu on the watch (refer to the watch's specific button functions).
- Navigate to the 'Heart Rate Zone' or 'Target Zone' option.
- Set your desired upper and lower BPM limits for your training zone.
- Select the alert type: visual (flashing display) or vibrating.
5.3. Tap on Lens (TOL) Function
The Tap on Lens feature provides quick access to certain functions without pressing physical buttons. A firm tap on the watch face may cycle through display modes or activate specific features. Consult the watch's on-screen prompts or specific instructions for TOL functionality.
5.4. Stopwatch Function
The integrated stopwatch allows you to time your workouts or specific intervals. Activate the stopwatch mode through the watch's menu or a dedicated button. Use the buttons to start, stop, and reset the timer.
5.5. Clock, Date, and Alarm
The watch displays the current time and date. An alarm function is also available, which can be set to provide an audible beep tone or a silent vibration. The display features an EL backlight for visibility in low-light conditions.
5.6. Silent Mode and Key Lock
To prevent accidental button presses during activity, activate the key lock feature. Silent mode can be engaged to disable audible beeps, providing a discreet operation. Refer to the watch's menu for activating these modes.
6. Maintenance
6.1. Cleaning
- Watch Unit: Wipe with a soft, damp cloth. Avoid harsh chemicals or abrasive cleaners.
- Chest Belt Transmitter: After each use, rinse the chest belt electrodes with clean water and hang to dry. Do not machine wash or tumble dry.
6.2. Battery Replacement
When the low battery indicator appears on the watch display, or if the chest belt stops transmitting, replace the batteries promptly. Use the specified battery types for each component. Refer to the battery compartment for instructions on opening and closing.
6.3. Water Resistance
The SmartHeart SE102 features water resistance. However, it is not designed for prolonged submersion or high-pressure water activities. Avoid operating buttons underwater. After exposure to water, dry the device thoroughly.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No heart rate displayed on watch. |
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| Inaccurate heart rate readings. |
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| Watch display is blank or dim. |
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| Alarm not sounding/vibrating. |
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8. Specifications
| Model Number | SE102 |
| Brand | Oregon Scientific |
| Product Dimensions | 26.67 x 24.13 x 7.62 cm (packaging); 158.75 g |
| Screen Size | 1.3 inches |
| UPC | 734811303028 |
| Heart Rate System | Analog |
| Features | Heart rate measurement, Heart rate zone alert (upper/lower), Stopwatch, Instant percentage heart rate (%HR), Visual and audio alert, Water resistant, Clock/date/day, Alarm with EL backlight, Silent mode, Key lock, Buzzer (beep tone), Low battery detection, Tap on Lens (TOL) function. |
9. Safety Information
- Consult your physician before starting any new exercise program, especially if you have pre-existing health conditions.
- This device is not a medical device and should not be used for diagnostic or treatment purposes.
- Keep batteries out of reach of children. Dispose of batteries according to local regulations.
- Avoid exposing the device to extreme temperatures, direct sunlight, or strong impacts.
- Do not attempt to disassemble or modify the device, as this will void the warranty and may cause damage or injury.
10. Warranty and Support
Oregon Scientific products are manufactured to high-quality standards. For information regarding warranty coverage, technical support, or service, please refer to the warranty card included with your product or visit the official Oregon Scientific website. Please retain your proof of purchase for warranty claims.





