检定规程JJG187—78第13条表2中规定了检定动圈仪表所需的主要标准仪器及设备是直流低阻电位差计和调压箱(毫伏信号发生器)。现就这两种仪器的有关问题作如下解释。一、直流电位差计的选取根据实验误差计算及数据处理方法可知,当标准仪器的允许基本误差δ_标与被检仪器的允许基本误差δ_被或下列比例关系时,δ标 Verification procedures JJG187-78 Article 13 of Table 2 provides for the determination of dynamic instruments required for the main standard instruments and equipment are DC low resistance potentiometer and surge tank (millivolt signal generator). Now on the two instruments related issues are explained as follows. First, the DC potentiometer selection According to the experimental error calculation and data processing methods, we can see that when the standard equipment allowable basic error δ_ and the basic error of the device being inspected δ_ is the following ratio, δ standard