There are several kinds of heat resistance of the connection way?

Thermal resistance at work, we will use a different connection mode. For wiring way, of course, different occasions will have certain request, so we need to know about the connection mode of thermal resistance, so in the future work, there may be some help.

in the modern work, there are three kinds of commonly used connection mode. We'll be the first to introduce is two wire. A two wire, is in the thermal resistance of a wire on both ends of the connection way to elicit resistance signal. Compared with other methods, the two wire is simpler, but it is important to note that the wire will exist in a certain lead resistance r, r size are influenced by the material and the influence of the length of the wire, so is usually in the measurement accuracy is not high under the condition of use.

by comparison, a common connection mode in a work is called a three wire system. The main advantage is that it can effectively eliminate the influence of the lead resistance, often with a bridge, known as commonly used in industrial process control, the lead resistance. When connection at one end of the thermal resistance of root to connect a wire, and then at the other end to connect two fuses.

as for the four wire system, also is easy to understand, is in its both ends respectively connected to the two wire. In these wires, including two root lead to provide constant current for thermal resistance, the resistance is converted into voltage signal, again through the other two fuses the voltage lead to secondary instrument. So, this kind of connection methods can achieve high accuracy requirement, this is because this kind of connection method has almost completely eliminates the lead resistance effects.

so, the connection method of thermal resistance is related to the content above, hope that after we are learning the knowledge, can be applied in the future work, practical and helpful for our work. Here, small make up recommend, also can know more about the knowledge of the thermal resistance, constantly improve their knowledge level.