Electromagnetic flowmeter use what error operation need to be avoided

Electromagnetic flowmeter is an intelligent flowmeter developed using advanced technology. It is very different from old-fashioned analog or non-intelligent electromagnetic flowmeters, especially in terms of measurement accuracy, reliability, stability, use functions and usage. life span, etc.

1. The liquid in the tube is not filled. Due to insufficient back pressure or poor installation position of the flow sensor, the liquid in the measuring tube cannot be filled. The fault phenomenon has different manifestations depending on the degree of underfill and the flow condition. If a small amount of gas appears as stratified flow or wavy flow in the water pipe, the fault phenomenon will be an increase in error, that is, the flow measurement value does not match the actual value; If the flow is bubble flow or plug flow, the fault phenomenon will be except that the measured value does not match the actual value. In addition to inconsistent values, output oscillation will also occur due to the gas phase momentarily covering the electrode surface; If the gas phase part of the flow cross-sectional area increases in the stratified flow of the horizontal pipeline, that is, the degree of liquid not filling the tube increases, output oscillation will also occur; If If the tube is not full of liquid, the situation is serious, so that the liquid level is below the electrode, and the output will be over-full.

2. The liquid contains solid phase. The liquid contains solids such as powder, particles or fibers. Possible faults include: ① slurry noise; ② contamination of the electrode surface; ③ conductive deposition layer or insulating deposition layer covering the electrode or lining; ④ lining Being worn or covered by sediment, the flow cross-sectional area is reduced.

3. Problems caused by improper selection of materials for electrodes and grounding rings. Electromagnetic flowmeters that cause malfunctions due to mismatch between materials and the measured medium. The parts in contact with the medium include electrodes and grounding rings. In addition to corrosion resistance problems, improper matching will also cause problems as long as it is Electrode surface effects. Supmea Automation Instrument Co., Ltd. is a company specializing in the production of electromagnetic flowmeters, turbine flowmeters, vortex flowmeters, magnetic flap level gauges, thermocouples, thermal resistors, bimetal thermometers and pressure gauges of various specifications, etc. As well as manufacturers of various non-standard flow meters, the company has advanced management levels, modern professional production equipment, and advanced calibration devices.