半偏法测电阻是利用待测电路中接入阻值很大的电阻,使得待测电表并联一个电阻发生半偏时,干路电流变化非常小,可近似按干路电流不变来处理。不管是半偏法还是三分之二偏测电阻,哪种测量方法使得干路电流变化越小,其测量就越准确。 The half-resistance measurement resistance uses the resistor with a large resistance in the circuit to be tested, so that when the resistance of the meter under test is half-biased in parallel with a resistor, the change in the main circuit current is very small, and the main circuit current can be similarly processed. Whether half-bias or two-thirds of the offset resistance, which measurement method makes the change in the mains current smaller, the more accurate the measurement is.