Abstract
Above 962°C, the ITS-90 is realized at NRC by a standard radiation thermometer with a known spectral responsivity and a silver freezing-point blackbody. Together with Planck's law, the temperature scale can be extrapolated to temperatures in excess of 2500°C albeit with uncertainties that increase with higher temperatures. This realization can then be disseminated to other radiation thermometers via a variable-temperature blackbody for use in, for example, calibration laboratories. In the future, it is expected that new high-temperature fixed points with transition temperatures exceeding 3000°C will allow an interpolated high-temperature realization and lower uncertainties.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call