The characteristics of electromagnetic flowmeter are introduced

Magnetic circuit system software: its function is to cause symmetrical direct current or communicate alternating current electromagnetic field.Dc magnetic circuit with a magnet to keep it, its advantage is that structure is simple, less dry scratching by communication field, but it is easy to make according to the measurement of liquid electrolyte solution in the ducts electric polarization, the positive electrode is surrounded by air negative ions, negative electrode is surrounded by positive ions, the electrode electric polarization condition, and internal resistance to expand in the middle of two electrodes, so serious damage to the dashboard in normal work.When the diameter of the pipeline is large, the magnet is relatively large, heavy and uneconomic, so the pressure transmitter generally adopts alternating electromagnetic fields, which are encouraged by 50HZ dc switching power supply.

The characteristics of electromagnetic flowmeter are introduced

Measuring tube: its function is to let the conductivity of the measured liquid based on.In order to make the magnetic induction line is separated or short-circuit fault according to the magnetic flux when measuring the catheter, the measuring catheter must be made of non-magnetic, low conductivity, low heat transfer rate and raw materials with a certain impact toughness, non-magnetic stainless steel plate, glass steel anticorrosion, high toughness plastic, aluminum, etc.

Electrode: its function is to find the induction potential data signal proportional to the measurement.The electrodes are generally made of non-magnetic stainless steel plates, and are required to be flush with the lining to facilitate fluid mechanics without being obstructed.It should be installed in the vertical position of the pipeline to avoid precipitation on the top of the measurement precision.

Housing: made of ferromagnetic raw materials, it is the housing of the electromagnetic coil of the excitation regulator of the distribution mechanism, and the protection of the dry torsion of the external electromagnetic field.

Lining: a detailed insulating lining is provided on the inner side of the measuring tube and on the flange protruding surface.It immediately touches the liquid under test. Its function is to improve the corrosion resistance of the measuring pipe and avoid the short-circuit fault of the inductive potential measured by the thickness of the wall of the pipe measured by the metal material.Lining raw materials are more corrosion - resistant, heat - resistant, wear - resistant polytetrafluoroethylene plastic, porcelain and so on.

Converter: the induced potential data signal caused by liquid fluidity is very weak and is greatly damaged by various dry torsion elements. The effect of converter is to make the induced potential data signal become larger and turn it into a unified standard data signal and suppress the key electromagnetic interference.Its daily task is to convert the induction potential data signal measured by the electrode into a uniform standard dc data signal.