skaala, mis on üles ehitatud rea reeperpunktide ja interpoleerimisprotseduuride alusel, mis on määratud rahvusvaheliste leppimustega, temperature scale adopted by the International Committee on Weights and Measures (CIPM) in 1989 for the purpose of practical measurements, defined to conform as closely as possible to the termodynamic temperature scale, by using a set of 17 reference materials, prescribed measuring instruments, and interpolation equations according to an internationally accepted convetion