一、概述为了校验高准确度的瓦特表,可以采用两种原理上不同的方法。其一是通过与主基准瓦特表进行直接比较,而这个标准瓦特表一般已在直器下校准,并且它的微小交直流转换误差是经适当的方法确定的。另一种方法是产生一个准确已知的交流功率,直接提供给被校瓦特 I. Overview In order to verify the high accuracy of the watt-hour meter, you can use two principles in different ways. One is to make a direct comparison with the master reference wattmeter, which has generally been calibrated under a collimator, and its tiny AC-DC conversion error is determined by an appropriate method. Another approach is to generate an accurately known AC power directly to the school watts