US2型交流电位差计主要用于检定相位表。对该电位差计检定时,测出了正交盘与同相盘的示值误差,要判断误差是否符合要求,是件很麻烦的事。为此,本文推导出了示值误差与相角误差间相互关系的数学表达式,从而使这一误差判断工怍大大简化。 US2 AC potentiometer is mainly used for checking the phase table. When testing the potentiometer, the indication error between the orthogonal disk and the in-phase disk is measured. It is troublesome to judge whether the error meets the requirement. For this reason, this paper deduces the mathematical expression of the relationship between the indication error and the phase angle error, which greatly simplifies this error judgment.