4-step installation test electromagnetic flowmeter

There are many applications for electromagnetic flowmeters. We often need to test and install them. What should we pay attention to when testing and installing? The following is a description of the steps required for the electromagnetic flowmeter electromagnetic flowmeter during installation and testing.

Electromagnetic flowmeter test 4 major steps require:

1 Electromagnetic flowmeter When the pipeline is filled with medium, use a multimeter to measure the resistance between terminals A, B and C. The resistance between A-C and B-C should be equal. If the difference is more than 1 time, there may be leakage of the electrode, condensation on the outer wall of the measuring tube or the junction box.

2 Electromagnetic flowmeter Under the condition of lining drying, measure the insulation resistance between A-C and B-C with MΩ meter (should be greater than 200MΩ). Then use a multimeter to measure the resistance of the two electrodes in terminals A and B and the measuring tube (should be in short-circuit communication). If the insulation resistance is small, indicating that the electrode is leaking, the entire flowmeter should be returned to the factory for repair. If the insulation is reduced but there is still more than 50 MΩ and the inspection result of step (1) is normal, the outer wall of the measuring tube may be damp, and the inside of the outer casing may be dried by a hot air blower.

3 Electromagnetic flowmeter Use a multimeter to measure the resistance between X and Y. If it exceeds 200Ω, the excitation coil and its lead wire may be open or poorly connected. Remove the terminal block check.

4 The electromagnetic flowmeter checks the insulation resistance between X, Y and C, which should be above 200MΩ. If it is lowered, the inside of the casing is dried by hot air. In actual operation, the insulation loss of the coil will lead to an increase in measurement error. The meter output signal is unstable.

The above is the four steps required for the installation test of the electromagnetic flowmeter. For more information, please visit us.

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