J4 ›› 2012, Vol. 25 ›› Issue (2): 72-75.doi: 10.3976/j.issn.1002-4026.2012.02.015

• Content • Previous Articles     Next Articles

Design of a high precision temperature measurement circuit

 LIU Meng-De1,2, HE Hai-Jing2, DU Li-Bing2   

  1. 1.Harbin Institute of Technology, Harbin 150001, China; 2.Institute of Oceanographic Instrumentation, Shandong Academy of Sciences, Qingdao 266001, China
  • Received:2011-11-23 Published:2012-04-20 Online:2012-04-20

Abstract:

       We design a high precision temperature measurement circuit excited by a constant current source with RTD and thermistor commonly employed in ocean environment detection. We also reduce the measurement error caused by current variation and self heating. Scene test shows that the circuit satisfies the requirement of ocean environment  detection.

Key words: RTD, NTC thermistor, AD7793

CLC Number: 

  • TP216

Open Access This article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0), which permits third parties to freely share (i.e., copy and redistribute the material in any medium or format) and adapt (i.e., remix, transform, or build upon the material) the articles published in this journal, provided that appropriate credit is given, a link to the license is provided, and any changes made are indicated. The material may not be used for commercial purposes. For details of the CC BY-NC 4.0 license, please visit: https://creativecommons.org/licenses/by-nc/4.0