RADIOMETRIC METHOD OF CONSTRUCTING A THERMODYNAMIC TEMPERATURE SCALE

A description is presented of a radiometric method of constructing a t hermodynamic temperature scale in the range 300-1000 K. The method is based on the Stefan-Boltzmann radiation law. The experimental unit con tains a vacuum radiator of the BBM (blackbody model) type with a regul able temperature, a cryogenic photometric chamber, and an absolute cry ogenic radiometer with electrical conversion. A method of extrapolatin g temperature and the measurement error is examined. The total error o f reproduction of thermodynamic temperature is no greater than 0.3 K.