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technical article
Common faults identification of electromagnetic flowmeter
2011-10-7 14:32:11

电磁流量计 调试期 故障 主要有电磁流量计的安装不 符合要求 、环境干扰、流体特性影响三方面原因。 First, the failure of the electromagnetic flowmeter during the commissioning period There are three main reasons for the failure of the installation of the electromagnetic flowmeter , environmental interference, and the influence of fluid characteristics.

电磁流量计 运行期 故障 1 内壁附着层 2 、雷电击损仪表有 3 条引入途径:电源线,传感器与转换器间的流量信号线和激磁线。 Second, the failure of the electromagnetic flowmeter during operation 1 , the inner wall adhesion layer ; 2 , there are three ways to introduce lightning damage to the instrument : the power line, the flow signal line and the excitation line between the sensor and the converter. 然而 其他两条途径较少 3 、环境条件变化 在运行期出现新干扰源 ( 比如 测量点附近管道或 较远处实施管道电焊) 干扰仪表正常运行,出现输出信号大幅度波动 From the analysis of the damaged parts during the lightning fault, most of the induced high voltage and surge current that caused the failure were introduced from the power line of the control room, but the other two paths were less ; 3 , the new environmental disturbances during operation Sources ( such as pipelines near the measurement point or pipeline welding at a distance ) interfere with the normal operation of the instrument, and the output signal fluctuates greatly.

、管道系统和相关设备类 故障: 1 、安装不善; 2 没有 满管; 3 、管系储留气体; 4 、不断吸入气体; 5 、往复泵或 控制阀振荡产生的脉动流; 6 、使用过程中流动状态 变化 Third , the failure of the pipeline system and related equipment : 1. Improper installation; 2. No full pipe; 3. Pipeline gas storage; 4. Constant inhalation of gas; 5. The pulsating flow generated by the reciprocating pump or control valve oscillation; 6. Changes in the flow state during use

、流体类故障主要: 1 、液体中含有气体 2 、液体中含有固体 3 、电导率不均匀 4 、液体接触件材料匹配 不恰 5 、流动噪声 Fourth , the main faults of fluids: 1. Liquid contains gas ; 2. Liquid contains solid ; 3. Electrical conductivity is not uniform ; 4. Material of liquid contact is not matched properly ; 5. Flow noise .

、环境故障 1 、强磁场 2 、强电磁波 3 、管道杂散电流 4 、地电位变化 5 、潮气 浸入 V. Environmental faults : 1. Strong magnetic field ; 2. Strong electromagnetic wave ; 3. Stray current of the pipeline ; 4. Change in ground potential ; 5. Infiltration of moisture