电磁流量计网络

本文章主要介绍了：电磁流量计网络,电磁流量计有流速要求,测量电磁流量计接地电阻,电磁流量计网络等信息

电磁流量计是根据法拉第电磁感应定律进行流量测量的流量计。电磁流量计的优点是压损极小，可测流量范围大。最大流量与最小流量的比值一般为20：1以上，适用的工业管径范围宽，最大可达3m，输出信号和被测流量成线性，精确度较高，可测量电导率≥5μs/cm的酸、碱、盐溶液、水、污水、腐蚀性液体以及泥浆、矿浆、纸浆等的流体流量。
▲管道内无可动部件，无阻流部件，测量中几乎没有附加压力损失。
▲测量结果与流速分布，流体压力，温度、密度、粘度等物理参数无关。
▲在现场可根据用户实际需要在线修改量程。
▲高清晰度背光LCD显示，全中文菜单操作，使用方便，操作简单，易学易懂。
(电磁流量计网络)

连接法兰国标GB9119-88(DIN2051,BS4504)
国内有哪些品牌电磁流量计朗高仪表测量是华仁仪表基于法拉第电磁感应定律。流量计的测量管是一内衬绝缘材料非导磁合金短管。两只电极沿管径方向穿通壁固定在测量管上。其电极头与衬里内表面基本齐平。励磁线圈由双向方波脉冲劢磁时，将在与测量管轴线垂直的方向上产生一磁通量密度为Ｂ的工作磁场。被测流体介质的温度、密度、压力、电导率、液固两相流体介质的液固成分比等参数不会影响测量结果。至于流动状态只要符合轴对称流动（如层流或紊流）就不会影响测量结果的。因此说电磁流量计是一种真正的体积流量计。对于制造厂和用户来说，只要用普通的水实际标定后就可测量其他任何导电流体介质的体积，而不需作任何修正，这是电磁流量计的一突出优点，是其他任何流量计所没有的。测量管内无活动及阻流部件，因此几乎没有压力损失，并具有很高的可靠性。
(电磁流量计网络)

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(电磁流量计网络)

1．调试期故障
调试期故障一般出现在仪表安装调试阶段，一经排除，在以后相同条件下不会再出现。常见的调试期故障通常由安装不妥、环境干扰以及流体特性影响等原因引起。
1.安装方面
通常是电磁流量传感器安装位置不正确引起的故障，常见的如将传感器安装在易积聚气体的管系最高点；或安装在自上而下的垂直管上，可能出现排空；或传感器后无背压，流体直接排入大气而形成测量管内非满管。
1.环境方面
通常主要是管道杂散电流干扰，空间强电磁波干扰，大型电机磁场干扰等。管道杂散电流干扰通常采取良好的单独接地保护就可获得满意结果，但如遇到强大的杂散电流(如电解车间管道，有时在两电极上感应的交流电势峰值Vpp可高达1V)，尚需采取另外措施和流量传感器与管道绝缘等。空间电磁波干扰一般经信号电缆引入，通常采用单层或多层屏蔽予以保护。
(电磁流量计网络)

2:为了保证电磁流量变送器测量管内充满被测介质，变迭器最好垂直安装，流向自下而上.尤其是对于液固两相流，必须垂直安装.若现场只允许水平安装，则必须保证两电极在同一水平面
3:电磁流量变送器两端应装阀门和旁路.
4:电磁流量变送器的电极所测出的几毫伏交流电势，是以变送器内液体电位为基础的.为了使液体电位稳定并位变送器与流体保持等电位，以保证稳定地进行测量，变送器外壳与金属管两端应有良好的接地，转换器外壳也应接地.接地电阻不能大于10，不能与其它电器设备的接地线共用。如果不能保证变送器外壳与金属管道良好接触，应用金属导线将它们连接起来.再可靠接地.
(电磁流量计网络)

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