(接上期)一、建立和用途(一)流量标准装置的建立由于流量计种类很多,其测量原理、结构、制造工艺、使用条件和安装方式等不尽相同,因此为避免这些原因带来流量计量上的误差,就需要寻求可以统一各种流量计之间差异的流量标准装置。流量这个参数,由于在自然界是不存在实物标准的导出量,其实物标准就是一套流量标准装置,需要在特定条件下,在装置上把几个基本量(长度、质量、时间、温度、压力等)合 (Continued) First, the establishment and use of (A) the establishment of flow standard device Because of the many types of flow meters, measurement principle, structure, manufacturing process, conditions of use and installation methods vary, so to avoid these reasons bring traffic Metering errors require the search for a flow standard device that can unify the differences between various flowmeters. Flow rate of this parameter, as there is no export in kind of physical standards, the physical standard is a set of flow standard device, the need under certain conditions, the device to a few basic quantities (length, quality, time, temperature, pressure Etc.)