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What legend is used to represent the electromagnetic flowmeter in the drawing?
It is represented by a box with EMF. Electromagnetic flowmeter is a flow meter that measures flow based on Faradays law of electromagnetic induction. The advantages of electromagnetic flowmeter are minimal pressure loss and a wide range of measurable flow rates. The ratio of maximum flow to minimum flow is 20:1 or higher. The applicable industrial pipe diameter range is wide, up to 3m, and the output signal is linear with the measured flow rate, with high accuracy. It can measure the fluid flow of acid, alkali, salt solutions, water, sewage, corrosive liquids, as well as mud, slurry, pulp, etc. with conductivity ≥ 5 μ s/cm. But it cannot measure the flow of gas, steam, and purified water. When a conductor cuts magnetic field lines in a magnetic field, an induced potential is generated in the conductor, and the magnitude of the induced potential is proportional to the effective length of the conductor in the magnetic field and the speed at which the conductor moves perpendicular to the direction of the magnetic field. Additional information: The reference error of electromagnetic flow meters can also be used to represent the error of flow meters used for instantaneous flow indication. The maximum allowable error series should comply with the provisions of Table 1. The accuracy level should no longer be given in the calibration results of the bid, but its maximum allowable error representation should be used, and FS should be marked after the maximum allowable error, such as ± 0.5% FS. In a single calibration of a flow meter, the flow meter error representation method should be given according to one of the accuracy level and the refe
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2. What is the wiring diagram of the flowmeter? How is the flowmeter wired? The wiring method of the flowmeter may vary depending on the type and brand. Here are two common wiring methods for flow meters for your reference.
1. Wiring method for split type flow meters: As shown in the above figure, the sensor and accumulator of the split type flow meter are installed separately and connected through signal cables. When wiring, it is necessary to connect the output signal of the sensor to the input terminal of the integrator. Generally speaking, the wiring method of a split type flowmeter is relatively simple. Simply connect the corresponding signal line to the integrator.
2. Wiring method of an integral flowmeter: As shown in the diagram, the integral flowmeter integrates the sensor and integrator together without the need for signal cables.
. When wiring, it is necessary to connect the output signal of the sensors dead end finger to the input terminal of the integrator. The wiring method of the integral flowmeter is relatively simple, just connect the corresponding signal line to the accumulator. It should be noted that different types of flow meters have different wiring methods, so it is necessary to carefully read the user manual of the flow meter before wiring to understand the correct wiring method. At the same time, safety should be taken into account during the wiring process to avoid contact with live parts or dangero
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