The absolute length of the process tube has a significant impact on the K-Series tracing system because the power of the K-Series system is constant. When the process line is too long or too short, it will cause a change in the power of the K-Series system. The K series system has a certain limit on the power adjustment. If the adjustment coefficient exceeds the system limit value, the system may have too high temperature, or the temperature is not enough, or even not start. Therefore, the more precise the process length of the K series system before and after design, it will be better to the system effect.