About the treatment of common faults in electromagnetic flowmeters

Electromagnetic flowmeters (EMFs) are instruments that use Faraday's law of electromagnetic induction to measure the flow of conductive fluids based on the electromotive force generated by a conductive fluid by cutting a magnetic field line. Common faults of electromagnetic flowmeters include: no display of the instrument, inaccurate flow measurement, empty pipe alarm (FGP), system alarm (SYS), upper and lower limit alarm (FQH FQL).
The instrument has no display: check steps: 1 check if the converter is in water; 2 check if the power cord connection is correct and reliable; 3 check if the fuse in the converter junction box is blown. Maintenance method: 1 If the water is in the water, the power is turned off and the water is cleaned. If it is not displayed, the converter needs to be replaced. 2 Connect the power supply wiring correctly and firmly; 3 If the fuse is blown, replace the fuse of the same type. Inaccurate flow measurement: check steps: 1 check whether the medium is full; 2 signal line is connected correctly and reliably; 3 check sensor diameter, meter coefficient 1, meter coefficient 2 is consistent with the sensor nameplate; 4 reading jumps, check whether the ground wire is Connected. Maintenance method: 1 If the medium can not be full, you need to re-install the flowmeter correctly; 2 connect the signal line correctly and firmly; 3 modify the parameters to make it consistent with the nameplate; 4 connect the grounding wire. Empty tube alarm (Mtsnsr): 1 Check if the medium is full. 2 short-circuit the converters SIG1 and SIG2 to SIG GND to see if the fault can be eliminated. 3 Check if the signal line is connected correctly. 4 Check if the electrode is contaminated (if it is contaminated Clean the contaminants with a soft brush); 5 In the case of zero flow, the check parameter Mtsnsr Emval should be greater than 500; 6 check the ground resistance of SIG1 or SIG2 if the medium is water and there is flow, Its value should be less than 50K ohms.

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