Preparation and debugging work before operation of electromagnetic flow meter

Abstract: The information of preparation and debugging before operation of electromagnetic flowmeter meter is provided by excellent flowmeter and flowmeter manufacturer and quotation manufacturer. Like ordinary instruments, after the electromagnetic flowmeter is installed and wired, before it is officially put into operation, it should be checked whether the following installation and wiring are correct, and whether the instrument can work normally. It must be emphasized here that for some inexperienced users. More flowmeter manufacturers select models and price quotations. You are welcome to inquire. The following is the details of the preparation and debugging work before the operation of the electromagnetic flowmeter. Like ordinary instruments, after the electromagnetic flowmeter is installed and wired, before it is officially put into operation, it should be checked whether the following installation and wiring are correct, and whether the instrument can work normally. It must be emphasized here that for some units lacking experience, the instrument installation and operation personnel should carefully read the relevant technical instructions in the relevant electromagnetic flowmeter installation and operation instructions, and be good at analyzing and thinking about the problems encountered in the initial operation. The whole set of electromagnetic flowmeter has been adjusted and calibrated on the flow calibration device of the manufacturer. As long as the matching number of the sensor and the converter and whether the instrument coefficient is correct, etc. are checked, it can generally be put into operation without any adjustment. Messed up the whole set of instruments that had been adjusted. Before the instrument is put into operation, the sensor must be filled with the actual measurement medium, and the zero point adjustment should be made in a static state after power-on. After being put into operation, it is also necessary to stop the flow to check the zero point regularly according to the medium and the conditions of use. Especially for the non-clean medium that is easy to precipitate, easy to contaminate the electrode, and contains 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 instrument is put into operation. ①Insulation resistance of the electrode (when the sensor is empty, the two resistances are the insulation resistance of the instrument shell or ground); ②The insulation resistance of the excitation coil (the insulation resistance of the excitation coil to the instrument shell or ground); ③The cold resistance value of the excitation coil ( That is, the copper resistance value of the enameled wire of the excitation coil); ④ The contact resistance sensor of the electrode is filled with liquid, and the resistance value between the electrode and the ground terminal is measured. The contact resistance value of the two electrodes should be roughly the same. These data are very helpful for the analysis of the reasons for the failure of the sensor after a period of operation. For example, when the contact resistance of the two electrodes changes, it indicates that the electrodes are likely to be contaminated; if the contact resistance increases, the contamination may be an insulating deposit; if the contact resistance decreases, the contamination may be a conductive deposit The contact resistance of the two electrodes is asymmetrical, indicating that the degree of pollution of the two electrodes is different; the decrease of the insulation resistance of the electrodes and the excitation coil indicates the degree of moisture of the sensor; when the insulation resistance drops to a certain extent, it will affect the normal operation of the instrument. 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 Commissioning Work Before Operation of Electromagnetic Flow Meter'

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