Measurement and Stability of Range Ratios of Standard Radiation Thermometers

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  • SAKUMA Fumihiro
    National Institute of Advanced Industrial Science and Technology
  • MA Laina
    National Institute of Advanced Industrial Science and Technology

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  • 標準放射温度計のレンジ比の測定とその安定性
  • ヒョウジュン ホウシャ オンドケイ ノ レンジヒ ノ ソクテイ ト ソノ アンテイセイ

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Abstract

0.65μm and 0.9μm radiation thermometers are used as the standard thermometers at high temperatures. These radiation thermometers employ three to five ranges to cover their whole temperature ranges. The range ratios of these thermometers influence the calibration uncertainty. The measurement method, measured results and the long term stability of the range ratios are shown.

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