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“电表的改装与校准”是一个经典实验,就是将一个表头G改装为一个大量程的电流表或一个大量程的电压表,也叫电表的扩程.表头的满偏电流和电压都很小,为了满足实际测量的需求,需要将微安表的量程扩大,从电路原理上讲,常采用的方法是利用并联电阻分流和串联电阻分压的原理.它是高中物理实验中的一个综合设计性实验项目,实验要求学生完成理论计算、元件的选择、电路的组装和电表的校准等环节.
“Meter modification and calibration ” is a classic experiment, that is, a header G converted into a large-scale ammeter or a large range of voltage meter, also called the meter’s expansion. Meter full-scale current and voltage Are very small, in order to meet the needs of the actual measurement, the need to expand the range of microamperes table, from the circuit theory, the method is often used shunt resistor in series and the series resistor divider principle .It is a high school physics experiment A comprehensive design of experimental projects, experiments require students to complete the theoretical calculations, the choice of components, the circuit assembly and meter calibration and other sectors.