摘要
从惠斯通电桥基本原理出发，讨论了不易桥臂与易桥臂法测电阻的误差计算方法，对检流计的电流灵敏度，电桥调节灵敏度及电桥灵敏度进行了分析。详细介绍了调节误差σRx的测量方法。根据JJG-126－88新的电阻箱检定规程，得出了电阻箱允许基本误差△’Rx的计算公式，
The article discusses the way to calculate resistance error on the basis of wiston bridge principles. It analyzes the current sensihvity of ghvanometer, the sensitivity of bridge and its adjust nwnt, and explores ways to improve the sensitivity of bridge. It also introduces in detail the measurement of adjustment error σRx and its confirmation, and derives a formula for calculating σRx - the basic error permitted by the resistance - box - from the new measurement rule for resistance - box JJG - 126 - 88.
