1. Introduction
The Srliya LX-107 is a portable solar radiometer power meter designed for accurate measurement of solar radiation intensity. This device is suitable for various applications including physical optics testing, window insulation effect testing, weather station monitoring, and general sunlight radiation intensity measurements. Its compact size, lightweight design, and user-friendly interface make it convenient for both professional and personal use.
Key features include a photometric probe for precise measurements, a large LCD screen with backlight for easy data reading, fast sampling rate, data retention, overload display, a built-in compass function, low voltage display, and automatic power-off.
Figure 1: Overview of the LX-107 Solar Radiometer Power Meter, showing the main unit, detached sensor, and integrated compass.
2. Setup
2.1 Battery Installation
- Locate the battery compartment on the back of the device.
- Open the battery back cover by sliding or unscrewing it.
- Insert one 6F22 9V battery, ensuring correct polarity (+/-).
- Close the battery back cover securely.
Figure 2: The open battery compartment, ready for 9V battery insertion.
2.2 Initial Power On
After installing the battery, press the POWER button to turn on the device. The LCD display will illuminate.
3. Operation
3.1 Basic Measurement
- Ensure the sensor cap is removed from the photometric probe.
- Aim the photometric probe directly at the sun or the light source you wish to measure.
- The radiation value will be displayed on the LCD screen in real-time.
Figure 3: The main unit display and control buttons during operation.
3.2 Function Buttons
- POWER: Turns the device on or off.
- RANGE: Cycles through measurement ranges (if applicable).
- HOLD: Freezes the current reading on the display. Press again to release.
- PEAK: Captures and displays the maximum radiation value detected.
- W/m²: Selects Watts per square meter as the unit of measurement.
- BTU: Selects BTU per square foot per hour as the unit of measurement.
3.3 Compass Function
The integrated compass on the sensor unit provides directional guidance, useful for orienting the sensor or for general navigation during outdoor measurements.
3.4 Automatic Power Off
To conserve battery life, the device features an automatic power-off function. If no buttons are pressed for a certain period, the meter will automatically shut down.
4. Specifications
| Feature | Description |
|---|---|
| Model | LX-107 |
| Material | ABS |
| Power Supply | 1 x 6F22 9V Battery (Not Included) |
| Purpose | Radiation Measurement |
| W/m² Range | 2000 W/m² |
| W/m² Accuracy | ±10W/m² or ±5% (whichever is greater) |
| W/m² Temp. Coefficient | ±0.38 W/m²/℃ (when deviating from 25℃) |
| BTU Range | 634 BTU/(ft² x h) |
| BTU Accuracy | ±BTU/(ft² x h) or ±5% (whichever is greater) |
| BTU Temp. Coefficient | [±0.12 BTU/(ft² x h)]/℃ (when deviating from 25℃) |
| Data Retention | Yes |
| Maximum Display | 1999 |
| Angle Accuracy | Cosine correction |
| Overload Display | "OL" |
| Sampling Rate | 2.5 times/sec |
| Compass Function | Yes |
| Sensor | Light diode with filter lens |
| Operating Temperature & Humidity | 0℃~50℃, less than 80% RH |
| Storage Temperature & Humidity | -10℃~60℃, less than 70% RH |
| Low Voltage Display | Yes |
| Automatic Power Off | Yes |
5. Maintenance
5.1 Cleaning
To clean the device, use a soft, dry cloth. For stubborn dirt, a slightly damp cloth with mild detergent can be used, ensuring no liquid enters the device. Do not use abrasive cleaners or solvents.
5.2 Sensor Protection
Always keep the sensor cap on the photometric probe when the device is not in use to protect it from dust, scratches, and damage.
Figure 4: The protective cap for the photometric sensor.
5.3 Battery Replacement
When the low voltage indicator appears on the display, replace the 9V battery promptly to ensure accurate readings and continued operation. Refer to section 2.1 for battery installation instructions.
5.4 Storage
Store the device in a cool, dry place, away from direct sunlight and extreme temperatures. If storing for extended periods, remove the battery to prevent leakage.
6. Troubleshooting
- Device does not power on: Check battery installation and ensure the battery has sufficient charge. Replace if necessary.
- Display shows "OL": This indicates an overload, meaning the measured radiation intensity exceeds the device's maximum range. Move to a less intense light source or adjust the measurement conditions.
- Inaccurate readings: Ensure the sensor is clean and free from obstructions. Verify the correct unit (W/m² or BTU) is selected. Ensure the sensor is aimed directly at the light source.
- Low voltage indicator: Replace the 9V battery immediately.
7. Warranty and Support
Information regarding product warranty and customer support was not available in the provided product data. For warranty details or technical assistance, please refer to the product packaging or contact the manufacturer directly.
