『CAD flowmeter legend』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
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. How to represent pressure gauges and flow meters in CAD
CAD is a drawing, and the drawing must comply with the national standard, which is called "non-standard design". The drawing of some components such as pressure gauges and flow meters should comply with the national standard GBT 50106-2010 Building Water Supply and Drainage Drawing Standard. A brief excerpt is as follows:
3. How to represent mass flow meters in CAD
Mass flow meters are represented in CAD: The volume of fluid in mass flow meters is a function of fluid temperature and pressure, and is a dependent variable, while the mass of fluid is a quantity that does not vary with time, space temperature, and pressure changes. As mentioned earlier, the flow measurement values of commonly used flow meters, such as orifice flow meters, turbine flow meters, vortex street flow meters, electromagnetic flow meters, rotor flow meters, ultrasonic flow meters, and elliptical gear flow meters, are the volumetric flow rates of fluids. The fluid volume involved in scientific research, production process control, quality management, economic accounting, and trade handover activities is generally quality. The use of the above-mentioned flowmeter to measure only the volumetric flow rate of the fluid often cannot meet peoples requirements, and it is usually necessary to find ways to obtain the mass flow rate of the fluid. Previously, the mass of a fluid could only be indirect
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