What is the working principle of tension load cell

The tension load cell is the most common sensor in the sensor. It is mainly used to measure the tension and pressure between solids. It is also called a tension pressure sensor for general use. Because its shape is like an S shape, it is also called habitually. S-type load cell, this sensor is made of alloy steel material, sealed and protected by glue, easy to install, convenient to use, suitable for electronic force measuring and weighing systems such as crane scales, batching scales, and machine scales.

At present, there are many manufacturers of S-type load cells in the Chinese market. So, what are the installation and use methods of S-type load cells? Today we will introduce the working principle and installation methods of S-type load cells!

What is the working principle of tension type load cell?

The S Type load cell is based on the principle: the elastic body (load cell block, sensitive beam) produces elastic deformation under the action of external force, so that the resistance strain gauge (conversion element) pasted on its surface also deforms. After the resistance strain gauge is deformed, its resistance The value will change (increase or decrease), and then the resistance change will be converted into an electrical signal (voltage or current) by the corresponding measuring circuit, thus completing the process of transforming the external force into an electrical signal.

How to install S-type load cell：

1:According to the required working environment, select the appropriate sensor range and determine the rated load of the sensor used. Although the load cell itself has a certain overload capacity, this situation should be avoided as much as possible during installation and use. Sometimes a short-term overload may cause permanent damage to the sensor.

2: The load cell should be handled with care, especially for small-capacity sensors that use alloy aluminum materials as elastomers. Any shock or drop caused by vibration is likely to cause a large output error.

3: Wiring according to the instructions before installation, common wiring method: red is the positive pole of the power supply, connected to EXC+, the black wire is the negative pole of the power supply, connected to EXC-, the green wire is the positive signal of the signal, connected to SIG+, and the white wire is the signal The negative pole, connected to SIG-, the blue wire is the positive feedback, connected to SEN+, the yellow wire is the negative feedback, connected to SEN-, the color of the wire may be different when each manufacturer leaves the factory, please connect according to the manual.

4: The sensor shell, protective cover, and lead connector are all sealed and cannot be opened at will. The cable should not be lengthened by itself, because the sensor cable has been adjusted according to the output resistance value at the factory, and the self-lengthening or shortening will affect the sensor output Resistance, in order to affect the accuracy of the entire sensor, if it really needs to be lengthened, it should be soldered at the joint, and moisture-proof sealant should be added, and the resistance should be added again to adjust to the factory default output resistance.

5:The cable of the sensor should be far away from the strong power supply line or the place with pulse wave, which can reduce the signal output of the sensor from the field interference source, reduce the error and improve the accuracy.

6:In high-precision applications, the tension sensor and instrument should be used after preheating for 30 minutes.

7: When purchasing the sensor as a spare part, the load cell should be stored in a dry, ventilated and non-corrosive gas room.