1. Product Overview
The Lascar EL-USB-2-LCD EasyLog Temperature and Humidity Data Logger is a standalone device designed to measure and record temperature and humidity readings. It features an on-board LCD display for real-time viewing of current, minimum, and maximum logged values.
This data logger is capable of storing over 16,000 readings within a temperature range of -35 to +80°C (-31 to +176°F) and a humidity range of 0 to 100% RH. Data can be easily downloaded to a PC via its USB port using the free EasyLog software for detailed analysis, graphing, printing, and export.

Image 1.1: The EL-USB-2-LCD data logger, showing its USB connector on the right, the LCD display in the center, and the model name "EL-USB-2-LCD RH/TEMP DATA LOGGER" on the left. The display shows "60%RH".
2. Package Contents
- EL-USB-2-LCD Data Logger
- ½ AA Battery
- Wall Mount Clip
- USB Cable (integrated)
- EasyLog Software (available for download)
3. Setup and Installation
3.1. Battery Installation
- Locate the battery compartment on the rear of the data logger.
- Carefully open the compartment cover.
- Insert the supplied ½ AA battery, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
3.2. Software Installation
The EasyLog software is required to configure the data logger and download recorded data. It is available for free download from the Lascar website.
- Visit the official Lascar Electronics website.
- Navigate to the support or downloads section for the EL-USB-2-LCD model.
- Download the latest version of the EasyLog software.
- Run the installer and follow the on-screen prompts to complete the installation.
- Once installed, launch the EasyLog software.
3.3. Connecting to PC
To configure the logger or download data, connect it to your computer:
- Remove the clear protective cap from the USB connector end of the data logger.
- Plug the data logger directly into an available USB port on your PC.
- The PC should recognize the device. If prompted, allow driver installation.
- Open the EasyLog software. The software will detect the connected logger.
4. Operating Instructions
4.1. Configuring the Data Logger
Before starting a logging session, configure the logger using the EasyLog software:
- Connect the data logger to your PC and open the EasyLog software.
- In the software, select the connected logger.
- Set parameters such as:
- Logging Rate: How often readings are taken (e.g., every 10 seconds, 1 minute, 1 hour).
- Start Mode: Immediate, push-button, or delayed start.
- Alarm Thresholds: Upper and lower limits for temperature and humidity.
- Units: °C/°F for temperature.
- Apply the settings to the data logger. The logger is now ready to begin logging.
4.2. Starting and Stopping Logging
Depending on your chosen start mode:
- Immediate Start: Logging begins as soon as settings are applied and the logger is disconnected from the PC.
- Push-Button Start: Press and hold the button on the logger until the 'REC' indicator appears on the LCD.
- Delayed Start: Logging will begin at the specified date and time.
To stop logging, reconnect the logger to the PC and use the EasyLog software to stop the session, or configure an end time/number of readings.
4.3. Viewing Data on LCD
The EL-USB-2-LCD features an on-board display. Press the button on the logger to cycle through the following information:
- Current Temperature
- Current Humidity
- Minimum Temperature recorded during the session
- Maximum Temperature recorded during the session
- Minimum Humidity recorded during the session
- Maximum Humidity recorded during the session
4.4. Downloading Data
- Connect the data logger to your PC via USB.
- Open the EasyLog software.
- The software will automatically detect the logger and prompt you to download the data.
- Once downloaded, the data can be viewed as a graph, table, or exported to formats like CSV for further analysis in other applications.
5. Maintenance
5.1. Battery Replacement
The data logger uses a ½ AA 3.6V Lithium battery. When the battery indicator on the LCD or software shows low power, replace the battery promptly to ensure continuous operation and data integrity.
- Ensure the logger is not actively logging data.
- Open the battery compartment as described in Section 3.1.
- Remove the old battery and insert a new ½ AA 3.6V Lithium battery, observing polarity.
- Close the compartment securely.
5.2. Cleaning
Clean the exterior of the data logger with a soft, damp cloth. Do not use abrasive cleaners or solvents. Ensure no moisture enters the USB port or sensor areas.
5.3. Storage
When not in use for extended periods, store the data logger in a cool, dry place, away from direct sunlight and extreme temperatures. Removing the battery during long-term storage is recommended to prevent leakage.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Logger not recognized by PC. | Incorrect USB connection, driver issue, or faulty USB port. | Try a different USB port. Reinstall EasyLog software to ensure drivers are correctly installed. Check USB cable for damage. |
| LCD display is blank or dim. | Low or depleted battery. | Replace the ½ AA battery. |
| Logger not starting to record. | Incorrect start mode configured, or battery too low. | Check start mode settings in EasyLog software. Ensure battery is charged or replaced. |
| Inaccurate readings. | Sensor obstruction, extreme environmental conditions, or calibration needed. | Ensure sensors are clear of dust/debris. Operate within specified temperature/humidity ranges. Contact Lascar support if calibration is suspected. |
7. Specifications
| Parameter | Value |
|---|---|
| Model | EL-USB-2-LCD |
| Measurement Range (Temperature) | -35 to +80°C (-31 to +176°F) |
| Measurement Range (Humidity) | 0 to 100% RH |
| Logging Capacity | Over 16,000 readings (temperature and humidity) |
| Interface | USB |
| Battery Type | ½ AA 3.6V Lithium |
| Mounting Type | Wall Mount (clip included) |
| Manufacturer | Lascar |
| UPC | 696738750470 |
8. Warranty and Support
For warranty information, technical support, or further assistance, please visit the official Lascar Electronics website or contact their customer service department. Keep your purchase receipt as proof of purchase.
Lascar Electronics Official Website: www.lascarelectronics.com




