前言在低温环境条件下,对温度的测量、显示和控制方面的要求随整个低温领域的发展而日益提高。多年来,模拟系统完全能满足工业界的各种需求,但随着全自动化系统的增长需要,那些标准的模拟技术已远远不能满足这方面的要求。许多模拟系统需要进行大量的调整才能达到所需的正确温度,以及保持正常的反馈增益 Preface At low ambient temperatures, the requirements for temperature measurement, display and control are increasing with the development of the entire cryogenic field. Over the years, the simulation system can fully meet the various needs of the industry, but with the growth of fully automated system needs, those standard analog technology is far from meeting this requirement. Many simulation systems require extensive adjustments to achieve the correct temperature required and maintain normal feedback gain