微机消谐装置（全称：微机电力谐振诊断消除装置）是放在放在PT的二次侧（所以也叫二次消谐）消除铁磁谐振的仪器。它与一次消谐器的区别在于微机消谐是一个消谐仪器，具有分析、记录、打印、上传等优势，但也有只能用于室内、消谐范围窄（只能消除工频、三倍频、二分频、三分频等指定频率谐振）等缺点。市场上的微机消谐型号大都是厂家自己命名，功能大致相同，没有统一的标准，所以消费者比较难以理解，除了参数外还有详细功能上一定要清楚。
A microcomputer based harmonic elimination device (full name: microcomputer power resonance diagnostic elimination device) is placed on the two side of PT (also called two time harmonic elimination) to eliminate ferroresonance. The difference between it and a harmonic elimination device in microcomputer harmonic elimination is a harmonic elimination apparatus, with analysis, recording, printing, upload and other advantages, but also can only be used for indoor, narrow range of harmonic elimination (only three and two, removing the power frequency divider, frequency of three specified frequency resonance) deficiency. Most of the microcomputer based harmonic elimination models in the market are named by their own manufacturers. Their functions are basically the same. There is no uniform standard, so consumers are hard to understand. Besides the parameters, they must have clear functions.