一、装置介绍这套装置是由江苏省质量技术监督气体流量计量检测中心与日本株式会社(OVAL)及上海自动化仪表研究院联合研发的装置(见图1)。该装置是使用了p VTt的气体流量标准装置,以空气为介质,既可以在负压的工况下工作也可以在正压的工况下工作。装置包括标准容器组、气源及动力部分、管路系统、夹表系统、温度、压力和湿度测量部分、阀门、电气控制部分。其上位机是通过计算机与用户交互实现,其 I. Introduction of the device This device is jointly developed by Jiangsu Province Quality and Technical Supervision Gas Flow Measurement and Testing Center and Japan Co., Ltd. (OVAL) and Shanghai Institute of Automation Instrumentation (see Figure 1). The device is a p VTt gas flow standard device that uses air as a medium and can work both under negative pressure conditions and under positive pressure conditions. Devices include standard containers, gas and power parts, piping systems, clamp system, temperature, pressure and humidity measurement section, valves, electrical control section. The PC is through the computer and user interaction, which