Why do the electromagnetic flowmeter can appear error? The reason is?

Why do the electromagnetic flowmeter can appear error? The reason is? Electromagnetic flowmeter is the basis of the principle of electromagnetic induction, according to the conductive fluid through additional magnetic field induced electromotive force to measure an instrument of conductive fluid flow. But in the use of electromagnetic flowmeter measurement error would happen, this is how to return a responsibility? What reason is caused? The next in kaifeng and industrial control instrument co. , LTD. , for everybody to specify it. 1, and there is no full of liquid. Due to the lack of back pressure or flow sensor installation location, not filled with the fluid the test tube. When the pipe is a small amount of gas, can make the results of measurement are usually deviated from the actual value, cause small error; When there are a lot of gas, then there will be a measured value is not stable, output and the measurement error is bigger, not as a correct result. 2, the solid component in the liquid to be tested. When this happens, the instrument will usually appear the following questions: liquid noise, motor is infected with dirt surface, the lining is wear or covered by sediment and flow area shrink, insulation sediments or sedimentary CHS electrode or lining, if the deposit has a conductive material, traffic signals are likely to be short circuit, make the instrument malfunction. 3, improper selection and grounding electrode ring material. Caused by material and does not match the measured medium fault of electromagnetic flowmeter with parts in contact with the medium and grounding electrode, the matching misconduct in addition to the corrosion problem, mainly is the electrode surface effect. Electrodes can reliably detect traffic signal, on the performance of the flow meter is very important. Grounding rings have the electrical connection with the media, through the grounding line and zero potential through. When connected to the sensor of the process piping for plastic or with insulation coating line, must install grounding loop, otherwise it will cause the instrument can't work normally. 4, conductivity has a tendency to within the liquid injection ratio of non-uniform flow 'dosing fluid, and injection liquid reciprocating pump is commonly used to join. If injection liquid and the main liquid conductivity is different, the mixture mixing, electromagnetic flowmeter sensor if its downstream, because of the rapid changes in conductivity can make the instrument output, while the liquid conductivity is greater than the threshold and slow change will not affect the normal electromagnetic flowmeter measurement. This phenomenon in feed water treatment project in the process of raw water to add coagulant is frequent. The above is the cause of electromagnetic flowmeter appear error, what has been discussed above we can see is mainly due to the previous improper selection, installation and use, hope everyone in the later operation can avoid the occurrence of these problems. Beijing kaifeng superfamily shihua is flow meter co. , LTD is a professional research, development, production and sales all kinds of liquid level, flow control and material level control of high-tech enterprises, the main products: electromagnetic flowmeter, open channel flow meter, water meter, liquid level float switch, electromagnetic resistance spin material level switch magnetic flap, maglev ball liquid level gauge, liquid level, flow switch, etc. Widely used in water treatment, shipbuilding industry, generator equipment, petrochemical industry, instrument pressure machinery and other industries. Companies always adhere to the 'wholeheartedly for customer service' the management policy, is committed to meet the requirements of each customer, in accordance with the needs of each client product development, we sincerely invite the broad masses of new and old friends to choose and buy products, your confidence and support will be our motivation and goal to go on.

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