Abstract: the electrical conductivity of medium effect on the electromagnetic
flow meter scale information produced by excellent flow meter, flow meter manufacturer to offer you the quotation.
Electromagnetic flowmeter is based on Faraday electromagnetic induction principle, which is produced in the measurement of electrical conductivity in the liquid has unique measurement advantages, and shunda flowmeter technology below small make up to and you talk in detail, of conductivity of medium on the influence of electromagnetic flowmeter.
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More flow meter manufacturers choose model price quote you are welcome to inquire, here is a medium conductivity to scale the influence of electromagnetic flowmeter article details.
Electromagnetic flowmeter is based on Faraday electromagnetic induction principle, which is produced in the measurement of electrical conductivity in the liquid has unique measurement advantages, flowmeter technology below small make up to and you talk in detail, of conductivity of medium on the influence of electromagnetic flowmeter.
At present, the input impedance of the electromagnetic flowmeter conversion path has been greatly improved, the measuring the electrical conductivity of liquid does not usually cause errors due to the change of conductivity of medium, but for certain converter input impedance, the electrical conductivity of measured medium has a lower limit value, cannot be lower than the lower limit value.
Is not adapt to the electrical conductivity of the measured medium is too big.
For example, when more than 10 - conductivity
1 (
S/cm)
, can reduce traffic signals, to change the indicated value, the instructions flow value less than the actual flow.
This is because in the electromagnetic flow meter, the magnetic field of finite length, measured the conductive liquid, only through the limited magnetic field to produce induced electromotive force e.
So, on behalf of the traffic signal induced electromotive force e is the result of the magnetic field of conductive liquid cutting lines of magnetic force, magnetic field on both ends of the outside of the conductive liquid without any contribution of e.
Instead, because they are two electrodes are connected, it also constitutes a part of the external circuit.
When
transmitter and converter connected together, this part of the external circuit and parallel converter input impedance phase and become a load transducer.
When the electrical conductivity of measured medium is very big, the resistance is small, / in no matter how high input impedance converter, this part will depend on the result of the liquid in parallel open circuit, so as to reduce the precision of transfer between the transmitter and transducer.
So for electromagnetic flowmeter, not affected by the electrical conductivity of medium is a range, conductance measured medium series of neither too big nor too small.
With the development of electronic technology, the progress of the converter input impedance, will can reduce the lower limit of the conductivity measured medium.
Above is about medium conductivity on the influence of electromagnetic flowmeter measurement, hope can offer to help in the process of use.
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