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
View MoreAt 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.
View MoreTurbine 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
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