Electromagnetic flowmeter problems should be how to troubleshooting

How to troubleshoot problems with electromagnetic flowmeter:

1. According to the working area, check whether the working power supply voltage is correct;

2. Whether the sensor grounding is reliable or damaged;

3. Whether the medium is full of the sensor and whether there are bubbles in the medium;

4. Whether the reading is correct and the measured value is within Is it within the measurement range?

5. Are the terminal wiring loose?

6. Is the flow sensor soaked in water?

How to troubleshoot problems with electromagnetic flowmeters:

1. The meter has no display;

2. Check whether the power is on;

3. Check whether the power fuse is intact;

4. Check whether the power supply voltage meets the requirements;

Electromagnetic flowmeter troubleshooting methods: resistance method; current method; voltage method; substitution method; Analog signal method; waveform method. Resistance method:

(1) On and off of the flow meter power fuse and excitation fuse;

(2) On and off of the electromagnetic flow meter signal cable and excitation cable;

(3) On-off and resistance value of electromagnetic flowmeter excitation coil;

(4) Insulation resistance of electromagnetic flowmeter excitation coil to ground;

(5) Electrode Symmetry measurement;

(6) Insulation resistance of electrode to ground;

Electromagnetic flowmeter converter inspection: The content of this inspection is to match the general instrument and flowmeter model The analog annunciator provides the flow signal for zeroing and calibration instead of the sensor. Calibration includes zero point check and adjustment, set point check, excitation current measurement, current/frequency output check, etc. It should be noted that the inspection items should be compared with the last inspection value (or factory value) to analyze whether there are changes or whether the changes meet the original measurement requirements. Electromagnetic flowmeter sensor inspection: check the copper resistance of the excitation coil; check the insulation resistance of the excitation coil; check the liquid contact resistance of the electrode; check the polarization voltage between electrodes/liquid; check the insulation of the signal circuit and the insulation between the excitation circuit/signal circuit.