Thread Content
The natural sources of interference for electromagnetic flowmeters come mainly from electrical noise in the atmosphere and cosmic noise in outer space. These sources are not only part of the basic environmental requirements for electromagnetic flowmeters, but they also constitute interference that affects radio communications and space technology. The natural noise of electromagnetic flowmeters can cause interference in the operation of satellites and spacecraft, as well as in the launch of ballistic missile launch vehicles. Artificial interference sources are those that generate disturbances in the energy of electromagnetic flowmeters, either through electrical signals or other artificial devices. Some of these devices are designed specifically to emit electromagnetic energy; examples include radio equipment for broadcasting, television, communication, and navigation, and such sources are referred to as intentional emission interference sources. There are also devices that, while performing their intended functions, emit electromagnetic energy as a byproduct; examples include vehicles, lighting fixtures, electric machinery, as well as industrial and medical radio frequency equipment. These are known as unintentional emission sources of interference. There are many categories of interference sources for electromagnetic flowmeters; classified by the nature of the electromagnetic interference, they can be divided into functional interference sources and non-functional interference sources. Functional interference sources refer to the direct interference caused to other devices during the functional operation of electromagnetic equipment, while non-functional interference sources are the side effects that arise or are generated alongside the performance of electrical devices, such as the interference caused by arc discharges that occur when switches are turned on and off. Based on the frequency width of the interference signals in electromagnetic flowmeters, they can be classified as broadband interference or narrowband interference; this distinction is made in relation to whether the bandwidth of the specific sensor is large or small. Any interference occurring in an electromagnetic flowmeter necessarily affects the energy transmission and its pathways; it is generally believed that there are two ways in which such interference can occur: conduction-based transmission and radiation-based transmission. Regarding the disturbed sensors, interference coupling can be divided into two main categories: conductive coupling and radiative coupling. In an electromagnetic flowmeter, for a conductive signal to be transmitted, there must be a complete electrical circuit connection between the source of interference and the sensor; interference signals are transmitted to the sensor along this connection circuit, thereby causing interference. In addition to its various power supply options, the electromagnetic flowmeter also boasts powerful internal functions; it is capable of measuring both the forward and reverse flow of the medium, can be used to determine the flow rate of liquid media, and is able to measure both instantaneous flow and cumulative flow. The electromagnetic flowmeter has become the preferred flowmeter for measuring liquid media in industrial enterprises. As long as a liquid has a certain level of electrical conductivity, an electromagnetic flowmeter can be used as a measurement tool. It is most commonly utilized for measuring conductive liquids such as water, wastewater, and sulfuric acid. If powered by 220V, electromagnetic flowmeters can be designed as integrated or modular units. Battery-powered electromagnetic flowmeters are not widely used at present; they are mainly employed in situations where there is no power supply available on site. It also has a fault alarm function, a function to switch between forward and reverse flow, settings for upward and downward flow, as well as an alarm function. If an electromagnetic flowmeter is to be powered with 24V, then it cannot be used in industrial environments where alternating current is used; from a safety perspective, low-voltage direct current should be employed in such situations. Alternatively, if a flow accumulation unit is used, it is this unit that supplies power to the electromagnetic flowmeter, in which case 24V power supply is the only option. For more information, please visit the company’s official website at http://www.yb1518.com/. Please retain this link when reproducing the content! http://www.yb1518.com/UploadFiles/2012717174126829.jpg