Common fault causes and treatment methods of Sick sensors

Create Date: 2024-8-30 12:03:23|Source: SICK/Sick

1. No weighing reading

This kind of fault is generally more common, the weighing value of a certain scale is zero, regardless of whether there is something on the scale, its weighing value is always zero.

There are several reasons for the above failures: a. the sensor is damaged, b. the line is open, c. the signal transmitter is faulty, and d. the junction box is not in good contact

a. Sensor damage: when detecting the empty scale and weighing with raw materials, the voltage value of the sensor output signal line, if the two values are the same, it means that the sensor has been damaged, if there is a significant difference between the two values, it means that the sensor is working normally. According to the following figure, the output signal of the sensor is detected, the working principle and boundary mode of different brands of sensors are roughly the same, and the following figure is the wiring principle of the 6-wire sensor.

b. There is a short circuit in the line: if the sensor is not damaged, you can check whether the line is broken, and the method is to find it all the way along the line of the sensor to see if the line is broken or has been cut.

c. Signal transmitter failure: After eliminating the above two reasons, we will check the signal transmitter, its detection method is basically the same as the sensor, detect whether its output signal has a voltage signal, and whether its value changes when the weight changes.

d. Poor contact of the junction box: This is mainly caused by not connecting the wire head firmly when wiring.

2. The weighing value fluctuates up and down

This phenomenon is manifested in the fact that the weight value of a certain scale fluctuates up and down, and it is beyond the normal error range.

The main reasons for SICK sensors: a. The mechanical vibration near the sensor is large, b. There are high-frequency signal transmitters near the mixing plant (including mobile signal towers and ultra-high voltage substations)

If the silo of the SICK sensor mount attachment is purely mechanically vibrate, the deformation of the sensor will change continuously, so the measured weight value will fluctuate. As for the problem of signal interference near the mixing plant, a reasonable site should be selected at the early stage of the construction of the plant, away from these interference sources.

Common fault causes and treatment methods of Sick sensors

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