Structural Principle of Digital Luxmeter
1. Introduction to the test of illuminance
Illuminance is the surface density of the luminous flux received on the illuminated plane. The illuminance meter is an instrument used to measure the illuminance on the illuminated surface, and it is one of the most widely used instruments in illuminance measurement.
How to use the digital illuminance meter:
1. Turn on the power.
2. Select the appropriate measurement range.
3. Open the light detection cover, and align the front of the light detector with the light source to be tested.
4. Read the measured value of the illuminance meter display.
5. When reading the measured value, if the highest digit shows "1", it means overload, and a higher gear should be selected immediately for measurement.
6. Data hold switch, turn the switch to "HOLD", the LCD will display the "□" symbol, and the displayed value is locked, turn the switch to "NO", then the reading lock function can be canceled.
7. After the measurement work is completed, please cover the photodetector, turn the switch to "OFF" and turn off the power of the instrument.
Maintenance and maintenance of digital illuminance meter:
1. Do not measure under high temperature and high humidity.
2. When in use, the photodetector must be kept clean.
3. The light source test reference level is at the top of the light-receiving sphere.
4. The sensitivity of the photodetector will be reduced by using conditions or time. It is recommended that you calibrate the instrument regularly to maintain the basic accuracy.
