describeSeparate design: the light sensor and the screen are separated. The sensor can freely choose the direction and height of the lighting, the reading is more practical, and the measurement is easier.3 ranges The range of this light meter is 3 rangesMeasuring range specifications: 2000, 20000, 100,000luxTemperature characteristics: 0.1%/CCategory: Light MeterInstructions for use:1. Turn on the power2. Select the appropriate measurement gear3. Open the light detection cover and align the front of the light detector with the light source to be measured4. Read the measured value of the illuminance meter LCD5. When reading the measured value, if the highest digit displays "1", it means overload, and you should immediately select a higher gear for measurement6. Data hold switch, pull the switch to HOLD, the LCD will display the "H" symbol, and the displayed value is locked. Pull the switch to ON to cancel the reading lock function.7. After the measurement is completed, please cover the photodetector and turn off the power of the instrument