The safety aspects of the electromagnetic flowmeter

Electromagnetic flowmeter by the electromagnetic flow sensor and electromagnetic flow converter composed of two parts. Is the main component of the measuring tube, electrode, excitation coil, iron core and magnetic yoke and shells. Sensor of measuring tube is a lining insulation of permeability alloys short tube. By current body must be the electrical conductivity of a liquid or slurry, the electromagnetic flowmeter is current body should not contain more ferromagnetic substance or bubbles, should according to the measurement of body temperature, pressure, corrosion and wear characteristics choose corresponding pressure levels, lining materials, electrode materials and instrument structure. Here is to introduce the electromagnetic flowmeter under security matters: 1, separation between electromagnetic flow meter transducer and sensor, must use shielded cable, shall not use other cables instead of cable length is not greater than 50 m, and signal cable must use galvanized pipe casing wear, and other power strictly separated. Such as galvanized pipe in the air, should the wires galvanized pipe and reliable grounding. 2, install the electromagnetic flow timing requirements must have a straight pipe before and after installation of straight pipe before and after the proposal * low request is a former straight pipe not less than 10 d, straight after the period of not less than 5 d, the measuring tube to ensure into the fluid flow of full development. 3, as far as possible to avoid strong vibration environment and strong corrosive gas, lest cause electrode and pipeline insulation damage. 4, 220 vac power supply for single alternating current (ac), the proposal in instrument box with air switch, lightning arrester and parallel connection, air switch wire out of the air switch followed by a three socket.

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