How to repair the Bridge type sensor

How to repair the Bridge type sensor ?

Keyword: Bridge type sensor, weighing system, scale load

In weighing systems, scale load sensors play a crucial role. Timely maintenance is particularly important when the sensor of a 100 ton weighing scale malfunctions. Next, we will provide a detailed introduction to the composition of the weighing system and the maintenance methods for the sensors.

The weighing system mainly consists of two parts: Bridge type sensor and weighing displays (weighing instruments). scale load Sensors are responsible for sensing weight and transmitting signals to instruments, while instruments are responsible for displaying and processing these signals.

Scale load Sensors are usually divided into two types: four wire and six wire. The four wire Bridge type sensor includes power lines (EXC+, EXC -) and signal lines (SIG+, SIG -). The six wire scale load sensor adds two feedback lines (SEN+, SEN -) on this basis, which are used to feed back the actual received voltage value to the weighing instrument. In addition, both four wire and six wire scale load sensors are equipped with shielded wires (SHIELD) to reduce external interference.

When the scale load sensor malfunctions, we can carry out maintenance through the following steps: first, check whether the wiring of the scale load sensor is correct and tight; Secondly, use a multimeter to measure the input, output resistance, and bridge resistance of the Bridge type sensor to determine if it meets the specifications; Finally, with the instrument powered on, measure whether the output voltage of the sensor is normal.

During the maintenance process, it is also necessary to pay attention to the following points: first, avoid using Bridge type sensor beyond the range to prevent irreversible damage to them; Secondly, during welding operations, it is necessary to disconnect the signal cable from the weighing display controller and set the welding ground wire near the welded area; The third is to regularly check the insulation performance of the Bridge type sensor cable to ensure its normal operation.