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同学:比特博士,正温度系数热敏电阻有哪些参数呢? 比特博士:热敏电阻的参数反映出它的主要性能和特征,是人们选择和应用热敏电阻的依据。热敏电阻主要有零功率电阻值、标称电阻值、耗散电阻值、耗散系数、B值、时间常数、温度系数、测量功率及额定功率等8个参数,通常在产品说明书中列出。 在规定的温度下测量热敏电阻器的电阻值时,如果测量功率产生的热量所引起的阻值变化相对于总的测量误差来说可以忽略不计,则所测得的电阻值称为零功率电阻值。 标称电阻值是指在基准温度为25℃时的零功率阻值,且常在热敏电阻器上标出。因此,在有的产品说明书的参数表
Classmate: Dr. Bite, what are the parameters of the PTC thermistor? Dr. Bit: The parameters of the thermistor reflect its main properties and characteristics, which is the basis for people to choose and apply the thermistor. Thermistor mainly has zero power resistance, nominal resistance, dissipation resistance, dissipation factor, B value, time constant, temperature coefficient, measurement of power and rated power of 8 parameters, usually listed in the product manual . When measuring the resistance of a thermistor at a specified temperature, if the change in resistance due to the heat generated by the measurement of the power is negligible relative to the total measurement error, the measured resistance is called zero power resistance. Nominal resistance refers to the zero power resistance at a reference temperature of 25 ° C and is often marked on the thermistor. Therefore, in some product manual parameters table