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Shunuo varistor / ESD varistor / product complete / Sunlord first-class agent
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NCP15WB473F03RC MURATA Murata thermistor original spot
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Test probe P100-M3
1. Measure the dark resistance value
The method of measuring the dark resistance value is shown in Figure 4.21. Use a piece of black paper to sense the photoresistor
The glossy surface is covered. When measuring, the pointer of the multimeter should remain basically unchanged, and the resistance value is close to infinity. This dark
The larger the resistance value, the better the performance of the photoresistor; if the value is small or close to zero, the photoresistor has been burned through and can no longer be used.
2. Measure the light resistance value
As shown in Figure 4.22, the light-transmissive window of the photoresistor is directed toward the light source, and the multimeter is pointed at this time.
The needle should have a large amplitude swing, and the resistance value is significantly reduced. The smaller the resistance value, the photosensitive resistor
The better the performance; if the value is large, the performance of the photoresistor is very poor; if the resistance is infinite,
It indicates that the open circuit of the photoresistor is damaged and can no longer be used.
