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| Research on Calibration of Short Base Metal Thermocouples |
| WANG Zhe,YU Song-lin,SHEN Wen-jie,LI Qiang-guang,TIAN Yun,JIANG Jing |
| Tianjin Institute of Metrological Supervision and Testing, Tianjin 300192, China |
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Abstract Short base metal thermocouples is a collective name,covering a kind of detachable base metal thermocouples with short electrode length(electrode length is 300~500mm) and base metal armored couples(length of metal sleeve is 300~500mm). Traditional measuring equipment and methods often fail to accurately measure the indication deviation in the high temperature region (above 300℃). The reason for the inaccuracy is found through experiments. The terminal thermostat is designed and developed to solve this problem and effectively reduce the extended uncertainty of the short-type even value deviation.
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Received: 23 August 2019
Published: 08 June 2020
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2020, Vol. 41 
