Flowmeter manufacturers discuss how to set parameters for electromagnetic flowmeters. Generally, parameters are set within a certain range. There are certain differences between different manufacturers. This is based on the product manual. The electromagnetic flowmeter sensor measures in real time. The fluid resistivity value is used to judge. Whether the pipeline is in a full state, so its empty pipe measurement value is a continuous value, although it is different fluids have different resistivity values u200bu200bto determine whether the flowmeter pipeline is in a full state, so in the Empty pipe measurement is a continuous value. Although different fluids have different resistivity values, as long as the fluid is in a full tube state, its resistivity value is stable. The electromagnetic flowmeter defines the resistivity value of the fluid in the full pipe state as 100%, that is, when the fluid is full, the empty pipe alarm threshold is used to calibrate the empty pipe measurement value to 100%. When the fluid level in the electromagnetic flowmeter pipeline is lower than the measuring electrode, when the electrode contacts the air, the relative resistivity of the flowmeter will increase. When it is higher than the empty pipe alarm threshold, the electromagnetic flowmeter will display the empty pipe alarm signal, which is calculated according to the actual usage. When the fluid is full, the empty pipe measurement value of the electromagnetic flowmeter can be calibrated to 100%, and when the fluid level in the pipe is completely lower than the electrode measuring the entire electromagnetic flowmeter, its empty pipe measurement value will be reach more than 1000%. Therefore, when the empty pipe alarm value of the electromagnetic flowmeter is set at about 900%, the status of the empty pipe can be calculated.
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