How to judge whether the weighing sensor of electronic belt scale is good or not?

The weighing sensor is the heart part of the electronic belt scale. As a necessary device in weighing control, we need to pay attention to the selection of the weighing sensor. How to judge whether the weighing sensor of the electronic belt scale is good or not? We can judge by the characteristics of the sensor of the electronic belt scale:

Impedance judgment method: remove the two output lines and input lines of the sensor of the electronic belt scale, and use a multimeter to test the output and input impedance and the insulation resistance between each core wire of the signal cable and the shielding layer. If the result of such a test cannot reach the value on the sensor certificate, it can be judged as a faulty sensor;

Judgment method of sensor signal output: when the resistance method cannot be used to judge whether the belt scale sensor is good or bad, the signal output method can be used for further detection; The electronic belt scale instrument can be powered on first, the sensor output wire is removed, and its output value is measured with a multimeter under an empty scale. The calculation is conducted according to the rated voltage, sensor sensitivity, and rated load. If the output value of one of the electronic belt scales exceeds the calculated value too much or is unstable, it can be judged that the electronic belt scale weighing sensor is faulty, because it should be equal when there is no bias load under ideal conditions