推荐回答（3个）
涡街流量计测量不准需要从多方面考虑，比如产品选型阶段、温度压力的影响、流量波动情况及涡街流量计漩涡发生体迎流面堆积的影响等等原因都可能造成涡街流量计测量不准。
涡街流量计在选型方面的一些问题：有些蒸汽涡街流量计在口径选型上或是在设计选型因为工艺条件的变动，会使其选择比平常大一点的规格。实际选型应该是选择尽可能小的口径，这样就可以提高测量的精度，例如在一条涡街管线设计上一共有几个设备使用，因为工艺部分设备有时会不使用。就是造成了实际使用的流量减小，在实际使用的青天仪表涡街流量计所造成原有设计选型口径过于大，这就相对于提高了可以测量的流量下限。在工艺管道小流量时指示是无法保证，涡街流量计在流量大时是可以使用，如果要重新改造，其难度就会有点大，它的工艺条件的变动只是临时的，是能够结合蒸汽涡街流量计参数来重新整理用以提高指示的准确度。
蒸汽涡街流量计测量对温度的影响，其稳定编号是对测量体的几何尺寸变化的非常明显，它是有两个部分所组成的。一个是旋涡发生体宽度发生变化就会引起；另一个是管道内经过变化而引起的。涡街流量计如果想要消除这个影响一般都是对K系数进行修正，就目前一些厂家的涡街流量计已经对温度的印象在软件中进行了固定温度修正与实时温度的修正。网页链接
蒸汽涡街流量计参数调整方向有什么原因问题：有可能是参数的错误，从而就会导致蒸汽涡街流量计的指示有问题，参数错误会使其二次仪表满频率计算有误。满度频率相差不多是指示长期不稳定，实际当中涡街流量计满度频率是大于计算满度频率使得指示大范围的波动，就无法读出数值。而一些资料上显示参数不一致也会影响到参数的最终确定，最后是通过重新标定结合相互比较确定了其参数，解决了这一问题。
涡街流量计可能会出现以下常见故障： 1.安装不当，如安装方向错误、未安装过滤器等。 2.管道漏气、调压阀漏气等。 3.传感器安装点上游有较大流速的脉动流，如变频泵、往复泵等。4. 现场环境有较强振动或电磁场干扰。 5.零点漂移过大。6. 显示器无显示或显示数值不稳定的故障 7.测量值不准确 8.输出信号不规律地上下波动
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