在检定和修理电工仪器、仪表的工作中,经常利用修正电阻进行串联(增加阻值)和并联(减少阻值)。在进行这项工作时,须考虑阻值、精度和功率三方面的问题,只有这些方面的参数都适合的电阻才是合格的修正电阻。下面我们分别讨论这三个参数的确定方法。一、阻值的确定方法设被调电阻为R,其误差为△R,实际值为R_s,修正电阻为R_x。 In the verification and repair of electrical instruments, instruments work, often use the correction resistor in series (increase resistance) and parallel (reduce resistance). In doing this work, we must consider the resistance, accuracy and power of the three aspects of the problem, only the parameters of these aspects of the resistance is qualified resistance correction. Here we discuss these three parameters to determine the method. First, the method of determining the resistance Set the resistance to be adjusted R, the error is △ R, the actual value of R_s, the correction resistance R_x.