Principles of digital illuminance meter construction:
The digital illuminance meter is suitable for measuring light level in agricultural production, daily life and outdoor traveling. It adopts a photoresistor as a photoelectric conversion device, and it contains a DC power supply, a voltage conversion circuit, a switch, a photoresistor, a test circuit, an A/D converter, a decoder, a display driver, and a display in series in turn at the output of said DC power supply. The utility model avoids the use of a photometric head, the DC power supply can be used only with a 3V battery, the decoder, the display driver and the display are integrated in an integrated circuit card, which makes it simple in structure, small in size, easy to move, and it also has the advantages of being responsive and so on.
Digital illuminance meter structure principle:
1. Introduction to the test of illuminance
Illuminance is the surface density of the light flux received on the illuminated plane. Illuminance meter is used to measure the illuminance of the illuminated surface of the instrument, is one of the more used in the measurement of illuminance.
Digital illuminance meter use method:
1. Turn on the power.
2. Select the appropriate measurement gear.
3. Open the light detection cover, and the light detector front to the light source to be measured.
4. Read the measured value on the illuminance meter display.
5. Read the measured value, such as the highest digit display "1" that is, overload, you should immediately select a higher level of measurement.
6. Data hold switch, switch to "HOLD", LCD display "□" symbol, and the display value is locked, switch to "NO", you can cancel the reading lock function. Turn the switch to "NO" to cancel the reading lock function.
7. After the measurement work is finished, please cover the light detector well and turn the switch to "OFF" to turn off the power of the meter.
Digital illuminance meter care and maintenance:
1. Do not measure under high temperature and high humidity.
2. When using, the light detector needs to be kept clean.
3. The light source test reference alignment at the top of the light receiving sphere.
4. The sensitivity of the light detector will be reduced by using conditions or time, it is recommended that you do regular calibration of the meter to maintain the basic accuracy.
Digital illuminance meter measurement method
Digital illuminance meter has a wide range of applications, mainly used in schools, hospitals, families, firms, factories, hotels, hotels, casinos, stores, department stores, barber stores and so on.
Digital illuminance meter maintenance:
1．Do not measure under high temperature and high temperature places.
2. When in use, the light detector needs to be kept clean.
3. The light source test reference alignment in the light receiving sphere at the top.
4. The sensitivity of the light detector will be reduced due to the use of conditions or time, it is recommended that you do regular calibration of the instrument to maintain the basic accuracy.
