General electromagnetic flowmeter parameters must be set, but many people are not clear how the electromagnetic flowmeter should be able to set its parameters, now we will talk to you briefly about how to set the parameters of the electromagnetic flowmeter. General parameters are set within a certain range, different manufacturers are certain differences, this should be subject to the commodity manual, electromagnetic flowmeter sensor in the immediate measurement of fluid resistance value to make a judgment. Whether the pipeline in the case of full tube, so its empty tube measurement value which is a continuous value, although this is a different fluid has a different resistance value to do the judgment, flowmeter pipeline in the case of full tube, so in the empty tube measurement value it is a continuous value. Although different fluids have different resistance values, but as long as the fluid is in the case of full pipe, its resistance value it is stable.
Split glass float flowmeter is based on the fluid flow rate corresponding to the fine electric potential to calculate the volume flow and can be derived from the 4-20mA current signal, in order to ensure that the correct signal, the flowmeter diameter settings, flow range and electromagnetic flowmeter index of three parameters. In these parameters, pipe diameter and electromagnetic flowmeter index are set in the factory before the instrument, so the customer can not set these two parameters, the user can also set the flow range before the electromagnetic flowmeter factory, this type of setting can only be set again when the customer has the requirement to change the range.
Electromagnetic flowmeter is defined by the fluid in the case of a full tube resistance value is 99%, that is, when the fluid is full, with empty tube alarm valve value will be corrected to 99% of the empty tube measurement value. The function of the integrated glass float flowmeter pipeline in the fluid level is less than the measurement of the electrical level, the electrical level in touch with the gas, the relative resistance of the flowmeter will increase. In higher than the empty tube alarm threshold, electromagnetic flowmeter will display empty tube alarm signal, which is based on the specific use of statistics. In the fluid full tube, the electromagnetic flowmeter empty tube measurement value can be corrected to 99% after, and when its pipeline fluid level is completely lower than the entire measurement of electromagnetic flowmeter electrode, it empty tube measurement value will reach more than 999%. Therefore, the empty pipe alarm value of electromagnetic flowmeter is set at 900% up and down, it can be projected to the empty pipe situation.
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