Electromagnetic flowmeter in the process of using many factors will affect the electromagnetic flowmeter measurement results inaccurate, then electromagnetic flowmeter error is caused mainly by what reasons?
1, the tube is not full of liquid: due to insufficient back pressure or flow sensor installation location is poor, resulting in the measurement of the liquid in the tube is not full of fault phenomena due to the degree of not full and flow conditions have different performance.
2, the measured value of the flow rate does not match the actual value: if a small amount of gas in the water pipe pipeline as a stratified flow or undulating flow, the failure phenomenon is manifested in the error increase.
3, the output shaking: if the flow is bubble flow or plug flow, the gas phase instantly cover the electrical surface.
4, if the horizontal pipeline stratified flow in the circulation of the cross-sectional area of the gas phase part of the increase, that is, the liquid is not full of the degree of increase, there will also be output shaking;
5, overfull phenomenon: if the liquid is not full of pipe situation is more serious, so that the liquid level in the electricity below, the output will appear overfull phenomenon.
6, the liquid contains powder, particles or fibres and other solids, may produce faults are;
(1) Slurry noise;
(2) Electrical surface tarnish;
(3) Conductive deposits or insulating deposits cover the electric or lining;
(4) The lining is abraded or covered by deposits, and the cross-sectional area of circulation is reduced.
Hangzhou Economic Development Area，Hangzhou 310018，China
