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本溪无线电一厂为了标定该厂生产的CLJ-2A超声流量计,提出了Φ300—800大口径变压头动态容积法水流量标准装置(以下简称装置)的设计方案。该方案与目前国内外多数采用的溢流式恒水头高位水塔方案相比,具有结构简单、投资少、耗能低等优点。但是随着标定过程中水位的下降,流速会发生变化。因此
In order to calibrate the CLJ-2A ultrasonic flowmeter manufactured by Benxi Radio Factory, the design scheme of Φ300-800 dynamic displacement volumetric water flow standard device (hereinafter referred to as device) of large-diameter transformer was put forward. Compared with the most widely adopted overflow constant head water tower scheme at home and abroad, the scheme has the advantages of simple structure, less investment and low energy consumption. But as the water level drops during the calibration, the flow rate will change. therefore