Abstract
The realization of the IPTS above 1337.58K is affected by several factors producing systematic errors. In this paper, the effects of the error factors associating directly with the multiplicative comparator of spectral radiances are theoretically discussed and experimentally investigated.
As the results, the accuracy of the comparator is estimated to be ±0.01% in transferring to the strip lamp the spectral radiance of the blackbody at the gold point and better than ±0.01% in multiplying the spectral radiance by the factor of two.
