Usage and types of illuminance meters
Illuminance meter according to the photoelectric conversion device to distinguish between the main silicon (selenium) photocell illuminance meter and photoelectric tube illuminance meter. Its illuminance value can be indicated by the digital display or pointer. Regardless of what kind of illuminance meter, are by photometric probe, measurement or conversion line and the number of meters and other components.
The basic characteristics of the illuminance meter and the quantitative expression of the error
1. Spectral response of the detector in the wavelength of the monochromatic radiation irradiation produced by the photocurrent or voltage output value and the monochromatic radiation flux ratio, known as the spectral response of the detector. Expressed as S. The expression is: the wavelength of the spectral responsivity and the reference wavelength of the spectral responsivity ratio, called the relative spectral responsivity. Denoted by S: the change in responsivity with wavelength by...
2.The use of illuminance meter
① Turn on the power supply.
② Open the cover of the light detector and place the light detector horizontally in the measuring position.
③Select the appropriate measuring gear.
If the left end of the display only shows "1", that is, the illumination is too much, you need to press the range key (⑧ key), adjust the measurement times.
④ The illuminance meter starts to work and shows the illuminance value on the display.
⑤ The data shown on the display changes constantly, when the display data is more stable, press the HOLD key (⑧ key) to lock the data.
⑥ Read and record the observed value displayed in the readout. The observed value is equal to the product of the displayed number and the range value in the reader.
For example: the screen displays 500, the lower right corner of the display state is "× 2000", the illuminance measurement value of 1,000,000lx, that is (500 × 2000).
⑦ Press the lock switch again to cancel the reading value lock function.
⑧ Each observation, three consecutive readings and record.
⑨ After each measurement is completed, press the power switch button to cut off the power supply.
⑩Cover the lid of the light detector and put it back in the box.
