Reducing Uncertainty in practical radiation thermometer calibration

Based on proposed changes to the mise en pratique of the definition of the Kelvin

Precision_SS_RTOnline — 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.

Reducing Uncertainty in practical radiation thermometer calibration based on proposed changes to the mise e…

Authors: David Lowe, Mich Broughton, Jonathan R Wilmott

 

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