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GB3853《一般用容积式压缩机性能试验方法》规定采用转矩转速仪（误差≤1％）作为测量压缩机轴功率的方法之一。本文主要讨论CAT辅助测试压缩机系统中,Apple-Ⅱ微型机与PY-IA转矩转速测量仪的接口技术,并对接口的硬件电器、软件框图以及有关设备的基本技术指标作了介绍。
GB3853 “general use of positive displacement compressor performance test method” requires the use of torque anemometer (error ≤ 1%) as one of the methods to measure compressor shaft power. This paper mainly discusses the interface technology between the Apple-Ⅱ microcomputer and the PY-IA torque and speed measuring instrument in the CAT auxiliary test compressor system, and introduces the hardware and software interfaces of the CAT and the basic technical specifications of the related equipment.