Based on proposed changes to the mise en pratique of the definition of the Kelvin
Online — NPL Poster — The effect of changing calibration traceability for radiation thermometry from the current International Temperature Scale of 1990 (ITS-90) to a proposed SI based scale is investigated in the context of the dissemination of a high temperature scale from national measurement institute to calibration laboratory.
It is shown that at temperatures up to 2500 °C the uncertainty in temperature scale realisation can be halved without changing the calibration laboratory methodology.
Significant benefits are possible now, based on present ITS-90, in advance of any proposed changes.
The requirements for a suitable radiation thermometer to achieve this are considered.
Authors: David Lowe, Mich Broughton, Jonathan R Wilmott
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