Chris Intelligent Technology Co., Ltd.

2023-02-19

Measuring principle and failure cause analysis of ultrasonic liquid level gauge

Ultrasonic liquid level gauge is a non-contact continuous liquid level measuring instrument controlled by microprocessor.Simple installation, convenient measurement, not affected by liquid viscosity and density.It is widely used in liquid level measurement due to its absence of mechanical moving parts, higher reliability and less maintenance.However, the measurement accuracy is relatively low, and there is a blind area in the measurement, so it cannot be measured in a pressure vessel, nor can it be used to measure volatile media.It is precisely because of the limitations of the ultrasonic level gauge itself that if no attention is paid during use, some failures are prone to occur.In order to help users use the ultrasonic liquid level gauge better, this article focuses on the working principle and failure causes of the ultrasonic liquid level gauge.1. Measuring principle of ultrasonic liquid level gauge In the measurement of ultrasonic liquid level gauge, the ultrasonic pulse is sent by the sensor (transducer), and after being reflected by the surface of the object, it is received by the same sensor (transducer) and converted into an electrical signal .sensor (pass

2023-02-19

How to choose the liquid level gauge?What are the advantages of radar level gauge?

What is a liquid level gauge: The height of the liquid medium in the container is called the liquid level, and the instrument for measuring the liquid level is called a liquid level gauge.The liquid level gauge is a kind of level instrument.The good structure and installation method of the level gauge can be applied to high temperature, high pressure, strong corrosion, easy crystallization, anti-blocking, anti-freezing and solid powdery and granular materials.It can measure the liquid level of strong corrosive medium, the liquid level of high temperature medium, and the liquid level of sealed container, which has nothing to do with the viscosity, density and working pressure of the medium.First, the selection of radar level gauges All kinds of liquid level instruments have their own characteristics and advantages. When selecting instruments for measuring media, various factors should be considered comprehensively, including the characteristics of the measured medium, medium measurement purpose and other factors such as environmental and economic conditions.Try to maximize the strengths and avoid weaknesses among many instruments, and choose the instrument suitable for the measurement medium and purpose.2. Consider the characteristics of the measured medium. Since there are many types of radar level gauges, before measuring, the first thing to do is to

2023-02-19

Working principle and selection of radar level gauge

The working principle and selection of radar level gauge 1. The working principle of radar level gauge The radar level gauge uses ultra-high frequency electromagnetic waves to emit through the antenna to the liquid surface of the detected container. When the electromagnetic waves hit the liquid surface and reflect back, The instrument detects the time difference between the launch wave and the echo, thereby calculating the height of the liquid surface.The better the conductivity of the measured medium or the greater the dielectric constant, the better the reflection effect of the echo signal.The radar level gauge is mainly composed of a transmitting and receiving device, a signal processor, an antenna, an operation panel, and a display.Transmit-reflect-receive is the basic working principle of radar level gauge.It is divided into time difference and frequency difference.The time-of-flight type is that the emission frequency is fixed, and the height of the measured liquid level is measured by measuring the running time of the emission wave and the reflection wave, and through an intelligent signal processor.The relationship between the running time of this type of radar level gauge and the distance of the liquid level is: t=2d/c.In the formula, C is the propagation speed of electromagnetic wave, C=300000km/s

2023-02-19

Liquid level gauge installation and use and precautions

Ultrasonic liquid level gauge is a non-contact continuous liquid level measuring instrument controlled by microprocessor.Simple installation, convenient measurement, not affected by liquid viscosity and density.It is widely used in liquid level measurement due to its absence of mechanical moving parts, higher reliability and less maintenance.However, the measurement accuracy is relatively low, and there is a blind area in the measurement, so it cannot be measured in a pressure vessel, nor can it be used to measure volatile media.It is precisely because of the limitations of the ultrasonic level gauge itself that if no attention is paid during use, some failures are prone to occur.In order to help users use the ultrasonic liquid level gauge better, this article focuses on the working principle and failure causes of the ultrasonic liquid level gauge.1. Measuring principle of ultrasonic liquid level gauge In the measurement of ultrasonic liquid level gauge, the ultrasonic pulse is sent by the sensor (transducer), and after being reflected by the surface of the object, it is received by the same sensor (transducer) and converted into an electrical signal .sensor (pass

2023-02-19

Common problems of electromagnetic flowmeter in coal chemical production

Electromagnetic flowmeter, as a flowmeter widely used in the current process industry, often has some problems in the production of coal chemical industry. Therefore, the analysis of common problems is as follows: 1. The phenomenon of air bubbles in the liquid and the phenomenon of non-full pipes. The measurement is inaccurate or the measurement value fluctuates (output fluctuation), and the formation of bubble-like gas in the liquid has two ways: from external suction and dissolved gas (air) in the liquid into free bubbles.If the liquid contains large air bubbles, the entire electrode can be covered when the electrode is wiped, so that the input circuit of the flow signal is opened instantaneously, resulting in fluctuations in the output signal.Partial pipe phenomenon can be regarded as an extreme case of liquid containing air bubbles.The liquid is not filled with the pipe can be divided into two situations where the liquid level is higher than the level of the measuring electrode or lower than the level.When the liquid level in the pipe is higher than the electrode level, if the straight pipe section before and after the pipe system is ideal, the measurement of the electromagnetic flowmeter can be stable mostly, but the measured value of the flowmeter

2023-02-19

What kind of errors often occur in radar level gauges

At present, in the liquid level measurement industry, radar liquid level gauges have already become the preferred instrument panel for customers.There is no doubt that this is because the radar level gauge has a wider range of applications than other measuring instruments.Perhaps, all commodities have their own deficiencies.In my opinion, there are still many problems that need to be improved urgently in the radar level gauge. According to the obvious improvement of people's technological level, it is gradually improving.So, let's take a look at what levels of errors will appear in general radar level gauges? We need to listen carefully to what the technical authority* of radar level gauges say.Under normal circumstances, the error caused by the radar level gauge mainly comes from the error of the instrument panel installation, which will cause the echo signal to be interfered, resulting in measurement errors.Therefore, experts remind that at the time of installation, the aspect ratio of the tank and the size of its beam angle must be fully considered, and any large installation space should be vacated for the radar level gauge.

2023-02-19

How to Correctly Troubleshoot the Turbine Flowmeter

Turbine flowmeter is a precision flow measuring instrument with multiple signal output modes, good repeatability and high measurement accuracy. It is widely used for tap water, pure water and other gases.The main common faults of the turbine flowmeter are: 1. The shut-off valve is not closed tightly, and there is leakage: check the status of the front-end valve, the valve is closed, and no flow passes through.2. Poor shielding and grounding of the signal line: * good grounding.*Ground wire, or the metal casing of the equipment.3. There are motors, frequency converters and other high-power equipment running nearby: the turbine flowmeter should be installed away from high-power equipment and avoid strong magnetic and electric field environments.Strong magnetoelectric signals can cause spurious signals in the flowmeter.What is the reason why the signal output or flow display value is very unstable after the turbine flowmeter is installed normally?1. Unstable power supply: For turbine flowmeters that require external power supply, the quality of the power supply should be guaranteed, and the instrument power supply should be separated from the high-power equipment power supply.When necessary, through the

2023-02-19

Pressure Switches and Pressure Transmitters

The instrumentation industry is a key industry in the field of automation. With the development of the global automation application environment, the number of instrumentation manufacturing companies is increasing year by year, and the demand for instrumentation is expanding steadily.Instruments and meters are widely used in the manufacturing industry. Instruments and meters are appliances or equipment used to detect, measure, observe, and calculate various physical quantities, material components, and physical parameters.In addition, instrumentation is a comprehensive product of a variety of science and technology, with a wide variety, a wide range of uses, and is constantly updated, and there are many classification methods.Specifically, it is divided according to the purpose and purpose of use, mainly including measuring instruments, automotive instruments, marine instruments, aviation instruments, navigation instruments, radio test instruments, carrier microwave test instruments, geological exploration test instruments, seismic test instruments, earth Surveying and mapping instruments, hydrological instruments, agricultural testing instruments, commercial testing instruments, teaching instruments, environmental protection instruments, etc. all belong to instruments and meters.In addition, Changhui Instrument understands that instrumentation has a wide range of applications

2023-02-19

How to apply for technology-based small and medium-sized enterprises to enjoy the super deduction policy for research and development expenses

The 2022 'Government Work Report' proposes to increase the implementation of the super deduction policy for R&D expenses and increase the super deduction ratio for small and medium-sized technology-based enterprises from 75% to *.How to apply to become a technology-based small and medium-sized enterprise?You need to read this article carefully.Who can apply for the evaluation of technology-based SMEs?1. Technology-based small and medium-sized enterprises must meet the following conditions at the same time: (1) Registered and established in * territory (excluding Hong Kong, Macao, and Taiwan regions) or established in accordance with the laws of foreign countries (regions) but the actual management agency is in * territory with sound accounting and implementation A resident enterprise that collects and collects R&D expenses accurately and pays corporate income tax after auditing the accounts.(2) The total number of employees does not exceed 500, the annual sales revenue does not exceed 200 million yuan, and the total assets do not exceed 200 million yuan.(3) The industry in which the enterprise is located does not fall within the scope of the restricted and eliminated categories stipulated in the 'Industrial Structure Adjustment Guidance Catalog' of the National Development and Reform Commission, and does not belong to the 'About the Ministry of Finance, the State Administration of Taxation and the Ministry of Science and Technology'

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Measuring principle and failure cause analysis of ultrasonic liquid level gauge

How to choose the liquid level gauge?What are the advantages of radar level gauge?

Working principle and selection of radar level gauge

Liquid level gauge installation and use and precautions

Common problems of electromagnetic flowmeter in coal chemical production

What kind of errors often occur in radar level gauges

How to Correctly Troubleshoot the Turbine Flowmeter

Pressure Switches and Pressure Transmitters

How to apply for technology-based small and medium-sized enterprises to enjoy the super deduction policy for research and development expenses

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