交流标准源5200A 是国内引进最多、使用最广泛的一种低频电压标准。本文着重分析了该源主要部分的线路原理和特点,以及为保证高准确度输出所采取的线路措施,在不同测量要求时仪器的正确使用、连接方式和维护及注意事项。 Exchange standard source 5200A is the most introduced, most widely used a low-frequency voltage standards. This article focuses on the principle and characteristics of the main part of the line and the line measures taken to ensure high accuracy of output, the correct use of the instrument for different measurement requirements, the connection and maintenance, and precautions.