Preparation and debugging of electromagnetic flow meter before work

Abstract: The preparation and debugging information of electromagnetic flowmeters before work is provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. After the electromagnetic flowmeter is installed and wired, and before it is officially put into operation, you should check whether the following devices and wiring are accurate and whether the appearance can work normally. It is necessary to emphasize here that, for some units that lack experience in use, the appearance of the device. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following are the details of the preparation and debugging articles before the work of the electromagnetic flowmeter. After the electromagnetic flowmeter is installed and wired, and before it is officially put into operation, you should check whether the following devices and wiring are accurate, and whether the appearance can work normally. It is necessary to emphasize here that for some units that lack operating experience, the operator of the external device should carefully read the relevant technical instructions in the operation manual of the relevant electromagnetic flowmeter device, and the questions encountered in the initial operation should be longer than analysis and thinking. . The whole set of electromagnetic flowmeter has been adjusted and calibrated on the flow calibration device of the manufacturer. It is only necessary to check whether the matching number of the sensor and the converter, whether the appearance coefficient is accurate, etc., usually can be put into operation without any adjustment. It messes up the whole set of looks that have been adjusted. Before the surface is put into operation, the sensor must be filled with the actual measurement medium, and the zero-point adjustment should be made in the stop state after power-on. After being put into operation, it is also necessary to stop the flow periodically to check the zero point according to the medium and operating conditions. Especially for non-cleaning media that are easy to precipitate, easily pollute electrodes, and rich in solids, more inspections should be carried out in the early stage of operation to gain experience and determine the normal inspection period. For qualified users, several basic parameters of the sensor should be measured and recorded before the surface is put into operation. ①Insulation resistance of the electrodes (when the sensor is empty, the two resistances are insulated against the outer casing or ground); ②Insulation resistance of the excitation coil (the insulation resistance of the excitation coil to the outer casing or ground); ③The cold resistance value of the excitation coil ( That is, the copper resistance value of the excitation coil enameled wire); ④ The touch resistance sensor of the electrode is filled with liquid, and the resistance value between the electrode and the ground terminal is measured. The touch resistance value of the two electrodes should be roughly the same. These data are very helpful in analyzing the reasons for the failure of the sensor after a period of operation. For example, when the touch resistance of the two electrodes changes, it indicates that the electrodes are likely to be contaminated; if the touch resistance increases, the contamination may be an insulating deposit; if the touch resistance decreases, the contamination may be a conductive deposit The contact resistance of the two electrodes is asymmetric, indicating that the degree of pollution of the two electrodes is different; the reduction of the insulation resistance of the electrodes and the excitation coil indicates the degree of moisture of the sensor; when the insulation resistance is reduced to a certain extent, it will affect the normal operation of the surface. The cold resistance value of the excitation coil is a parameter to ensure the normality of the excitation coil. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Preparation and debugging of electromagnetic flow meter before work'
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