Author(s)

Xuefei Lv, Ying Lv

Corresponding Author

Xuefei Lv

Abstract

In order to ensure the accuracy and reliability of the temperature transmitter measurement with thermocouple sensor, in this paper , the second-class standard platinum-iridium 10-platinum thermocouple was used as the reference standard in the teaching process. A temperature transmitter with a thermocouple sensor was calibrated in a thermocouple calibration furnace, and the uncertainty of the measurement was evaluated. The results show that the uncertainty of the measurement results of the thermocouple temperature transmitter is in accordance with JJF1094-2002 "Measuring Instrument Characteristics Evaluation", and the extended uncertainty is less than 1/3 of its maximum allowable error. The research methods and results of the uncertainty evaluation of measurement results have important theoretical significance and application promotion value in teaching and engineering practice.

Keywords

Uncertainty, Standard platinum-10% rhodium/platinum thermocouple, Mathematical Model, Transmitter