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How to debug the electromagnetic flowmeter converter

As with the normal instrument, after the installation and wiring are completed, before the installation is officially put into operation, the following installation and wiring should be inspected correctly, and the instrument can work normally.

It must be emphasized here that for some units that lack experience, the instrument installation and operation personnel should carefully read the relevant technical instructions in the relevant installation instructions, and be good at analyzing and thinking about the problems encountered in the initial operation. Vortex Flowmeter This product features advanced circuit, low power consumption, wide range ratio, simple structure, low resistance loss, ruggedness, wide application, long service life, stable operation and easy installation and debugging. It is mainly used for flow measurement of industrial pipeline medium fluids, such as gases, liquids, vapors and other media. The whole set has been adjusted and calibrated on the manufacturer's flow calibration device. As long as the sensor and converter matching numbers are checked, the meter factor is correct, etc., and generally can be put into operation without any adjustment. Confuse the original set of adjusted instruments.

Before the instrument is put into operation, the sensor must be filled with the actual measurement medium. After power-on, make a zero adjustment in the static state. After entering the operation, it is also necessary to regularly check the zero point according to the medium and the conditions of use. Especially for the easy-precipitating, polluting electrodes and non-cleaning media containing solids, in the initial stage of operation, more inspection should be carried out to gain experience and determine the normal inspection cycle.

For qualified users, several basic parameters of the sensor should be measured and recorded before the instrument is put into operation.

1 electrode insulation resistance (sensor (when empty tube, two resistors to the instrument case or ground insulation resistance);

2 the insulation resistance of the excitation coil (the insulation resistance of the excitation coil to the instrument case or ground);

3 the cold resistance value of the excitation coil (ie the copper resistance value of the excitation coil enameled wire);

The contact resistance sensor of the 4 electrode is filled with liquid, and the resistance between the electrode and the ground is measured. The contact resistance of the two electrodes should be substantially the same. In addition to measuring the volume flow of general conductive liquids, the sewage flow meter can also be used to measure the volumetric flow rate of strong corrosive liquids such as strong acid and alkali, and uniform liquid-solid two-phase suspension liquids such as mud, slurry and pulp. Widely used in petroleum, chemical, metallurgy, textile, paper, environmental protection, food and other industrial sectors and municipal management, water conservancy construction, river dredging and other fields of flow measurement.

These data (data) are useful for analyzing the cause of sensor failure after a period of operation. Electromagnetic flowmeters In the 1950s and 1960s, new flow measuring instruments developed rapidly with the development of electronic technology. The electromagnetic flowmeter is an inductive meter manufactured according to Faraday's law of electromagnetic induction for measuring the volumetric flow rate of a conductive medium in a tube. For example, when the contact resistance of the two electrodes changes, it indicates that the electrode is likely to be contaminated; the contact resistance becomes large, and the contaminant may be an insulating deposit; the contact resistance becomes small and may be contaminated. The material is a conductive deposit; the contact resistance of the two electrodes is asymmetrical, indicating that the two electrodes are contaminated to varying degrees; the insulation resistance of the electrode and the excitation coil indicates that the sensor is wet (release: the object is infiltrated by moisture) When the insulation resistance drops to a certain level, it will affect the normal operation of the instrument. The cold resistance value of the excitation coil is a parameter that ensures the excitation coil is normal.

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