1. Introduction
The FNIRSI FPM-02 is a professional, high-precision 3-in-1 illuminance tester, temperature meter, and humidity meter. Designed for accurate and rapid measurements, it features a color screen display, a highly sensitive photosensitive probe, and a wide measurement range, making it suitable for various professional and everyday scenarios.

Image: The FNIRSI FPM-02 Luxmeter displaying light, temperature, and humidity readings, with key features highlighted.
2. Key Features
- 3-in-1 Functionality: Measures illuminance (Lux/FC), temperature, and humidity.
- High-Precision Probe: Ensures accurate and reliable measurements.
- Fast Measurement: Achieves 0.5-second quick measurements with two rapid samplings per second.
- Wide Measurement Range: Up to 99990 LUX, suitable for diverse professional applications.
- TFT HD Color Screen: Clear display with backlight for readability in various environmental conditions.
- 180° Rotatable Probe: Supports multi-angle data collection for flexible use.
- Data Retention: Allows users to hold current readings on the screen.
- Curve Display: Visual representation of measurement trends.
- Auto Shutdown: Power-saving feature.
- Alarm Function: Alerts for specific conditions.

Image: Close-up of the highly sensitive photosensitive probe, illustrating its fast and accurate measurement capabilities.

Image: The 180-degree rotatable probe, showcasing its flexibility for multi-angle data collection.
3. Specifications
| Feature | Specification |
|---|---|
| Brand Name | FNIRSI |
| Model Number | FPM-02 |
| Type | Color Screen Illuminance Meter |
| Measuring Range | 1000, 9999, 99990 LUX / 100, 1000, 10000 FC |
| Resolution (LUX) | <1000: 0.1; ≥1000: 1; ≥10000: 10 |
| Resolution (FC) | <100: 0.01; <1000: 0.1; >1000: 1 |
| Units Display | LUX, FC |
| Screen | 2.0 Inch Color Screen |
| Battery Capacity | 1500mAh |
| Charging Specification | USB Type-C, 5V/1A |
| Battery Included | Yes |
| Data Hold | Yes |
| Curve Display | Yes |
| Auto Shutdown | Yes |
| Alarm | Yes |
| Size | 182*63*28mm |
| Weight | 205g |
| Origin | Mainland China |
| Certification | CE |
4. Package Contents
- 1 x FNIRSI FPM-02 Luxmeter
- 1 x USB Type-C Charging Cable
- 1 x User Manual (this document)
5. Setup
5.1 Initial Charging
Before first use, fully charge the device using the provided USB Type-C cable and a 5V/1A power adapter. The charging port is located on the device. The screen will indicate charging status.
5.2 Power On/Off
Press and hold the power button (usually marked with a power symbol) to turn the device on or off. The TFT HD color screen will illuminate upon startup.
5.3 Probe Adjustment
The photosensitive probe can be rotated 180 degrees. Adjust the probe to face the light source or area you wish to measure for optimal accuracy. Ensure the probe is clean and unobstructed.

Image: The TFT HD color screen display, showing its clarity and backlight for various environments.
6. Operating Instructions
6.1 Basic Measurement
Once powered on, the device will automatically begin measuring illuminance, temperature, and humidity. The current readings will be displayed on the main screen. The measurement unit for illuminance (LUX or FC) can typically be switched using a dedicated button or through the device's menu settings.

Image: The luxmeter actively measuring light, demonstrating its large measurement range.
6.2 Data Hold Function
To freeze the current readings on the screen, press the 'HOLD' button (if available) or the designated button for data retention. Press it again to resume live measurements.
6.3 Unit Switching (LUX/FC)
Locate the 'UNIT' or 'MODE' button. Pressing this button will toggle between LUX and FC units for illuminance measurement.
6.4 Auto Shutdown
The device is equipped with an auto-shutdown feature to conserve battery. If no operation is detected for a certain period, the device will automatically power off. This setting can usually be configured or disabled in the system settings.
6.5 Alarm Function
The FPM-02 includes an alarm function. Refer to the on-screen menu or settings to configure alarm thresholds for illuminance, temperature, or humidity. The device will alert you if measurements exceed or fall below these set limits.
6.6 Curve Display
Access the curve display mode through the device's menu. This feature provides a graphical representation of measurement trends over time, which can be useful for monitoring changes in light, temperature, or humidity.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents. Ensure the photosensitive probe is kept clean and free of dust or smudges for accurate readings.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: For optimal battery life, avoid fully discharging the battery frequently. Recharge the device when the battery level is low. If storing for an extended period, charge the battery to approximately 50% and recharge every few months.
- Avoid Impact: Protect the device from drops and impacts, especially the sensitive probe area.
8. Troubleshooting
- Device not powering on: Ensure the battery is charged. Connect the device to a 5V/1A USB Type-C charger and try again.
- Inaccurate readings: Check if the photosensitive probe is clean and unobstructed. Ensure the probe is correctly oriented towards the light source. Avoid measuring in rapidly changing light conditions.
- Screen not responding: Try restarting the device by holding down the power button. If the issue persists, ensure the battery is adequately charged.
- Unit display incorrect: Use the 'UNIT' or 'MODE' button to cycle through the available illuminance units (LUX/FC).
9. User Tips
- For consistent illuminance measurements, always position the probe at the same height and angle relative to the light source.
- When measuring ambient light, ensure no shadows are cast on the probe by your hand or body.
- Utilize the data hold function to record stable readings in fluctuating environments.
- Regularly check the battery level, especially before critical measurements, to avoid interruptions.

Image: Examples of where the FNIRSI FPM-02 can be used, such as home, laboratory, and outdoor lighting.
10. Warranty and Support
For any technical support, warranty claims, or service inquiries regarding your FNIRSI FPM-02 Luxmeter, please contact the manufacturer or your point of purchase. Ensure you have your model number (FPM-02) and proof of purchase available when seeking assistance.





