1 The liquid in the tube is not overflowing due to lack of back pressure or poor position of the flow sensor device. Causes the liquid in the measuring tube to fail to overflow, the fault phenomenon has different performance due to the level of non-flooding and the activity situation. If a small amount of gas shows a stratified or wavy flow in the water pipe, the fault phenomenon shows an increase in error, that is, the flow measurement value and practice The value does not match; if the activity is a bubble flow or plug flow, the fault phenomenon will not only be inconsistent with the measured value, but also cause the output to fluctuate due to the gas phase covering the electrode surface. Large, that is, the level of the liquid under-filled tube will increase, and the output will slosh. If the liquid under-filled tube is more serious, causing the liquid level below the electrode, the output will be full.
应慎用有些易结晶化工物料在温度正常的状况下能正常丈量、由于保送流体的导管都有良好的伴热保温、在保温工作时不会结晶、但是电磁流量传感器的丈量管难以施行伴热保温、因而、流体流过丈量管时易因降温而惹起内壁结上一层固体。 2 Crystallized liquids and electromagnetic flowmeters should be used cautiously. Some easily crystallizable chemical materials can be measured normally under normal temperature conditions. Because the conduits that transport fluids have good heat tracing and insulation, they will not crystallize during thermal insulation work, but electromagnetic flow The measuring tube of the sensor is difficult to perform heat tracing, so when the fluid flows through the measuring tube, it is easy to cause a layer of solid on the inner wall due to the cooling. 的上游管道伴热保温予以强化；在管道衔接办法上、思索流量传感器拆装便当、在一旦结晶时能便当地拆下维护； Since there is also a crystallization problem when using other principle flowmeters to measure, so if there is no other better way, a "ring" electromagnetic flow sensor with a very short measuring tube length can be selected, and the upstream pipeline of the flowmeter can be used. The heat tracing insulation is strengthened; in terms of pipeline connection methods, think about the flow sensor disassembly and assembly, and once it is crystallized, it can be removed and maintained locally;
3 Liquid contains solid phase Liquid contains powder, granules or fibers and other solids. Possible problems include:
Stained electrode surface
Conductive or insulating stacks cover electrodes or linings
Lining is worn or covered by deposits, reducing cross-sectional area of circulation