Electromagnetic flowmeter manufacturers Supmea analysis in the use of problem solutions electromagnetic flowmeter applications and development has always been in the industry is more concerned, especially in the water supply industry, because the electromagnetic flowmeter has a good waterproof and corrosion, anti-interference and so on the ability.
Turbine flowmeter adopts piezoelectric stress type sensor, which is highly reliable and can work in the operating temperature range of -20℃～+250℃. There are analog standard signals, but also digital pulse signal output, easy to use with computers and other digital systems, is a more advanced, ideal measuring instruments. Electromagnetic flowmeter according to Faraday's law of electromagnetic induction manufactured to measure the volume flow of electrically conductive media in the pipe inductive instrumentation. Steam flowmeter is characterized by small pressure loss, large range, high accuracy, in the measurement of the volume flow of fluid density, pressure, temperature, viscosity and other parameters almost independent of the impact. There are no moving mechanical parts, so the reliability is high and the maintenance is small. Instrument parameters can be stabilized for a long time.
Then in the use of electromagnetic flowmeter there must also be some problems topic, today so we collect to analyze and understand. First of all, the electromagnetic flowmeter sensor electrode detection flow signal for the millivolt level, and based on the sensor in the fluid potential, so the external interference has a great impact on it, so good grounding largely determines the measurement accuracy of the flowmeter. The measured fluid itself as a conductor must exclude other irrelevant electromagnetic interference. The potential signal detected by the electrode is not subject to external parasitic potential interference... For the sensor, there should be a good separate ground wire, grounding resistance of less than 10 Ω. In the pipe connected to the sensor coated with insulation or long or short metal pipe, the sensor should be set on both sides of the grounding ring.
Secondly, in the measurement of fluids in the attachment of the electrode liner adheres to the sediment, which contaminates the electrode surface and often leads to changes in the zero point, and it is necessary to pay attention to it. The relationship between the change in zero point and the extent of electrode contamination problems compared with quantitative analysis, but it can be said that the smaller the diameter of the electrode in question, the less influence in the use of the electrode, care should be taken to remove the electrode in order to prevent adhesion. In the lining attached to the precipitate δ [the error that arises in small amounts, is the same if the thickness of this attachment can be calculated from the following formula: Δε = 1-2/[1 + (Kω/KF) + (1 - Kω/Kf individual) × (1-2T/d)2], where Kω, KF and respectively, measure the electrical conductivity of the fluid deposits, the thickness of the deposits at t when a diameter D. If the formulas, Kω and Kf individual are equal and there is no error, then the low conductivity of the deposit, the chemical formula is similarly so, but because the output impedance of the electrode increases, thus limiting, as the insulating deposit is immersed in the fluid this case.
On the contrary, such as metal powders attached because of the high conductivity of the adhesive layer, the short-circuit induced potential, the output of the electrodes for the low, thus generating a negative bias. In the measurement of fluids with precipitated sediments, in addition to selecting a liner precipitation is difficult to attach PTFE such as glass or the like, the flow rate should be increased. If bubbles in the fluid, including the volume flow rate of the bubbles, and the measured flow rate value of the measured average contains no mess, the error introduced. In conclusion, in the selection of this flowmeter, especially large-diameter electromagnetic flowmeter should be considered when lining the sensor electrodes for future and maintenance issues. Finally, in the signal transmission network cable length of the subject sensor (i.e. electrodes) and the converter system between the connection cable the shorter the better.
However, some enterprise site by the installation of different locations of the working environment, the converter and the sensor interval is farther, then consider the maximum length of the design title through the connecting cable.Supmea in the production of electromagnetic flowmeter has many years of research and development and production experience, electromagnetic flowmeter manufacturers choose Supmea, your wise choice! If there is a selection or need a quote, you can directly consult our online customer service for a detailed understanding!
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