Turbine flowmeter flow display error analysis?

When the above faults occur in the intelligent liquid turbine flowmeter, we can first judge in this way. When there are 50HZ or other frequency interference signals entering the display instrument, we first use the positioning rod to rotate the insertion rod, and then drive the turbine head to rotate .90 degrees When there is no flow signal at this time, the display instrument will not display. If there is a display, it can be judged that it is caused by the interference signal. At the same time, we can also lift the head of the turbine to the inner cavity of the ball valve. In order to ensure that there is no flow rate at this time, if the display instrument still displays, it can be concluded that it is caused by interference signals. We can also use an oscilloscope to observe the signal waveform to determine whether there are interference signals. If it is not caused by interference signals, we need to check whether the shielding layer of the signal cable or the connection of other grounding wires is disconnected, or whether the wiring is wrong or poor contact, etc. For this, we need to check the Correctness and quality of wiring. When the detection coil of the sensor is damp or the insulation resistance of the coil to the shell does not drop too much, we need to dry or replace the detection coil and the desiccant to ensure that the desiccant is displayed in blue, and to detect the insulation resistance of the coil to the sensor shell, we can Check with a 500V megohmmeter to ensure that it is not lower than 20 megohm. It should be noted that both ends of the inspection coil must be disconnected from the selected terminal board, and then check with a megohmmeter to prevent damage to the circuit.

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