影响超声波流量计测量准确度的因素：1、上下游直管段对超声波流量计测量准确度的影响。标定系数K是雷诺数的函数，流体从层流过度到紊流，流速分布不均匀，标定系数K将产生较大的变化，引起测量准确度下降。根据使用要求，超声波流量计换能器应安装在上游直管段为10D，下游直管段为5D的位置，对于上游存在泵、阀等设备时直管段的长度，要求“距离紊流、震动、热源、噪音源和射线源越远越好”。如果
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