Types of light meters and how to use them
Types of illuminance meters
1. Visual illuminance meter: inconvenient to use, not very accurate, rarely used
2. Photoelectric illuminance meter: Commonly used selenium photovoltaic illuminance meter and silicon photovoltaic illuminance meter
The composition and usage requirements of photocell illuminance meter:
1. Composition: microammeter, shift knob, zero point adjustment, terminal, photocell, V(λ) correction filter, etc.
Commonly used selenium (Se) photovoltaic cells or silicon (Si) photovoltaic cells illuminance meters, also known as lux meters
How to use the light meter:
①Turn on the power.
②Open the photodetector cover and place the photodetector horizontally in the measurement position.
③Choose a suitable measurement gear.
If only "1" is displayed on the left end of the display, it means that the illumination is excessive, and you need to press the range key (⑧ key) to adjust the measurement multiple.
④The illuminance meter starts to work and displays the illuminance value on the display screen.
⑤The data displayed on the display screen is constantly changing. When the displayed data is relatively stable, press the HOLD key (⑧ key) to lock the data.
⑥Read and record the observed values displayed in the reader. The observed value is equal to the number displayed on the readout multiplied by the span value.
For example: 500 is displayed on the screen, the status displayed in the lower right corner is "×2000", and the illumination measurement value is 1000000lx, that is (500×2000).
⑦Press the lock switch again to cancel the reading value lock function.
⑧ During each observation, take three consecutive readings and record them.
⑨After each measurement is completed, press the power switch key to cut off the power.
⑩Cover the photodetector cover and put it back into the box.
