Chapter 2 Introduction
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converter via a cable. After a series of analog and digital signal processing, the
accumulated flow and real-time flow are displayed on the display of the converter.
2.3. Mechanical Construction
The electromagnetic flowmeter is mainly consisted of the following parts, see
Figure 4.
Figure 4
The electromagnetic flowmeter mainly consists of a sensor and a converter. The
sensor includes a flange, a lining, an electrode, a measuring tube, an excitation coil,
and a sensor casing, etc; the converter includes an internal circuit board and a
converter casing.
(1) Converter: Provide stable excitation current for the sensor, meanwhile
amplify the induced electromotive force obtained by the sensor and convert
it to standard electrical signals or frequency signals; at the same time, it
displays real-time flow and parameters for displaying, controlling and
adjusting thereof.
(2) Flange: for connecting process piping.
(3) Lining: Refer to a complete layer of electrically insulating corrosion resistant
material located at the inner side of measuring tube and flange sealing
surface.
(4) Electrode: A pair of electrodes is installed on the wall of the measuring tube
which is perpendicular to the magnetic line to detect the flow signal. The
material of electrode can be selected according to the corrosion
1-Converter; 2-Flange;
3-Insulation lining; 4-Electrode;
5-Measuring tube; 6-Excitation coil;
7-Casing