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1概述1.1测量依据:JJG639-98《医用超声诊断仪超声源》。1.2环境条件:温度(15～35)℃,相对湿度≤80%,气压(86-106)kpa,电源220V(110%),50Hz。1.3测量标准:毫瓦级超声功率计,分辨力优于2mW,准确
1 Overview 1.1 Measurement Basis: JJG639-98 “Medical ultrasound diagnostic ultrasound source.” 1.2 Environmental conditions: temperature (15 ~ 35) ℃, relative humidity ≤ 80%, pressure (86-106) kpa, power 220V (110%), 50Hz. 1.3 Measurement standards: Milliwatt ultrasonic power meter, resolution better than 2mW, accurate