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How to maintain electromagnetic flowmeter introduction

What do we need to pay attention to when using electromagnetic flowmeters? Today, Chengfeng Instrument will make a simple explanation for everyone. I hope everyone will pay attention to the following points regarding the maintenance of electromagnetic flowmeter:
1, routine maintenance
Only need to periodically check the instrument, check the environment around the instrument, remove the dirt, ensure that no water and other substances are inspected, check whether the wiring is good, check whether there is a new strong electromagnetic field device near the instrument or a new installed wire across the instrument.
If the measuring medium is easy to contaminate the electrode or precipitate or scale in the measuring tube wall, it should be regularly cleaned and cleaned.
2, sensor inspection
Test steps:
(1) In the case of lining drying, measure the insulation resistance between A-C and B-C with MΩ meter (should be greater than 200 MΩ). 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.
(2) When the pipeline is filled with medium, measure the resistance between terminals A, B and C with a multimeter. 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.
3, fault finding
After the flowmeter starts to be put into operation or is put into normal operation for a period of time, it is found that the instrument is not working properly.
First check the external condition of the flowmeter, such as whether the power supply is good, whether the pipeline is leaking or is in a state of non-full pipe, whether there is air bubble in the pipe, whether the signal cable is damaged, and whether the converter output signal (ie, the rear instrument input circuit) is open. Remember to blindly disassemble the flowmeter.

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