1. The signal transmission wires use twisted-pair wires, which can make the distance between the two signal wires and the interference source approximately equal, and the distributed capacitance is approximately the same, so the serial mode interference of the incoming number display can be greatly reduced.
2. In order to prevent the interference of the electric field, the signal wire can be inserted into the iron pipe, or the shielded wire can be used, and the shielding layer should be grounded. For DC signals, a filter circuit can be added to the input end of the digital display to minimize the stray signal interference. The signal line should be far away from the power line. The signal line and power line should not enter the instrument through the same hole. The signal line should be as short as possible. The twisted wire is connected to the adjacent position of the signal terminal.
3. The housing of the digital display meter and the transmitter should be grounded to maintain zero potential. In order to improve the anti-interference ability of the meter, the amplifier of the meter can be "floated", that is, the amplifier and the meter housing can be insulated to cut off common mode interference. The leakage path of the voltage.
Dec 30, 2022
