About the treatment of common faults in electromagnetic flowmeters

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.