Pay attention to the suitability of choosing ppe

Although the fluid flow can be accurately measured, how to solve the "small-signal" problem of the electromagnetic flowmeter in practical applications is also an important factor affecting the accuracy of the measurement. Although it is possible to accurately measure the fluid flow, and not the only way to solve the "small-signal measurement electromagnetic flowmeter" problem, it will affect the measurement accuracy. It is a phenomenon of cumulative signal of small and medium traffic. The formation mechanism of the small signal electromagnetic flowmeter susceptible to interference and error process, as a "small signal" like this phenomenon actually measured the scene. The electromagnetic flowmeter works, which shows that it is generated from disturbances of various electromagnetic flowmeters.

Many factory problems below:

(1) When the pump starts, the traffic signal generated by the flowmeter's liquid, disconnects the magnetic flux, which is the follow-up of these liquids and must be cumulatively used. The flow measurement aspect is effective not to be. When the pump stops, the pipes, magnetic field lines, and small signals are the same, and not in these liquids, in actual production environments, the flow meter and the large PLC PLCs accumulate samples that will cause the wrong use of a small amount of liquid backflow to be reversed.

(2) For external shocks with a magnetic disturbance of 1 large, in the "medium, the role of the vibration signal outside the world flow sensor, there is no introduction of the signal, this signal, rather than measuring the current limit" accidentally "The instrument is also very high, very May accumulate. Insulation of electrode surface layer Incorrect adhesion occurs according to mA signal, free from external interference and electrodes

(3) Create a signal that deviates from the normal value, amplify, and zero drift during the conversion process. These phenomena are all small signal behaviors. Anti-signal processing caused by the interference signal, the problem of small signals in order to find a solution from the process control, the process can not be resolved from the design point of view. There are two ways to deal with it, through hardware and software. The way of hardware, which is used to filter the interference signal is mainly through this way, may be through the comparison of electronic switches composed of circuits, for the construction, the production part of the enterprise is the increased غير مجاز مي باشدt, because there are many Taiwanese flowmeters on many grounds Corresponds to this type of instrument communication. Article Source: http://

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