1. Introduction
This manual provides essential information for the proper setup, operation, and maintenance of your Lascar Electronics EL-BT-2 Temperature and Humidity Data Logger. The EL-BT-2 is a Bluetooth-enabled device designed for accurate monitoring and recording of ambient temperature and relative humidity. Please read these instructions carefully before using the device to ensure optimal performance and longevity.
2. Product Overview
The EL-BT-2 is a compact, battery-powered data logger featuring a clear digital display and Bluetooth connectivity for seamless data transfer to a compatible mobile application.

Figure 1: Front view of the EL-BT-2 Data Logger, displaying a temperature reading and Bluetooth icon.
Key Features:
- Measures and logs temperature and relative humidity.
- Bluetooth connectivity for wireless data access.
- Digital display for real-time readings.
- Battery powered for portable use.
3. Setup
3.1 Battery Installation
- Locate the battery compartment on the device.
- Open the compartment cover.
- Insert the required batteries, ensuring correct polarity.
- Close the battery compartment cover securely.
3.2 Mobile Application Download
To utilize the full functionality of the EL-BT-2, download the compatible mobile application from your device's app store. Search for 'Lascar EasyLog Bluetooth' or similar.
3.3 Initial Connection and Configuration
- Ensure Bluetooth is enabled on your mobile device.
- Open the EasyLog Bluetooth application.
- The application will scan for nearby EL-BT-2 devices. Select your device from the list.
- Follow the on-screen prompts within the app to configure logging intervals, alarm thresholds, and other settings.
4. Operating Instructions
4.1 Starting and Stopping Data Logging
Data logging is primarily controlled through the mobile application. Once connected:
- Navigate to the 'Control' section within the app.
- Select 'Start Logging' to begin recording data according to your configured settings.
- To stop logging, select 'Stop Logging' in the same section.
4.2 Viewing Real-time Data and Logged Information
The mobile application provides a comprehensive interface for viewing current readings and historical data.

Figure 2: Mobile application interface showing current temperature, humidity, and dew point readings.
- Current Reading: Displays the immediate temperature, humidity, and calculated dew point.
- Current Status: Provides information on the device's logging status, battery level, and connection.
- Data Download: Logged data can be downloaded from the device to the app for analysis, graphing, and export.
5. Maintenance
5.1 Cleaning
To clean the EL-BT-2, gently wipe the exterior with a clean, damp cloth. Do not use abrasive cleaners or immerse the device in water.
5.2 Battery Replacement
When the battery indicator on the device or in the mobile application shows low power, replace the batteries following the instructions in Section 3.1. Use only recommended battery types.
5.3 Storage
If storing the device for an extended period, remove the batteries to prevent leakage. Store in a cool, dry place away from direct sunlight and extreme temperatures.
6. Troubleshooting
- Device not connecting via Bluetooth:
- Ensure the device is powered on and within range of your mobile device.
- Verify Bluetooth is enabled on your mobile device.
- Restart both the EL-BT-2 and your mobile device.
- Check if the batteries in the EL-BT-2 are sufficiently charged.
- Inaccurate readings:
- Ensure the device is placed in an environment free from direct heat sources, cold drafts, or high humidity fluctuations.
- Allow the device to acclimatize to the environment for at least 30 minutes before taking critical readings.
- Data not logging:
- Confirm that logging was initiated through the mobile application.
- Check the device's battery level.
- Ensure the device's internal memory is not full (check via the app).
7. Specifications
| Feature | Detail |
|---|---|
| Item Model Number | EL-BT-2 |
| Product Dimensions | 5.12 x 7.09 x 3.94 inches |
| Power Source | Battery Powered |
| Reusability | Reusable |
| Product Care Instructions | Wipe Clean |
8. Warranty and Support
Lascar Electronics products are designed for reliability and performance. For specific warranty details, please refer to the documentation included with your purchase or visit the official Lascar Electronics website. For technical support, troubleshooting assistance, or further inquiries, please contact Lascar Electronics customer service through their official channels.
This manual is subject to change without notice. Please refer to the manufacturer's website for the latest version.





