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Title: Techniques And Methods For Realizing Its 90
Author: .I. Travener, H. Sostman, Mangum, E. Pfieffer, G. Strouse T.P. Wang, D. Bediones, R.L.HICKEY, Gustavus Bernal
Source: 1991 Measurement Science Conference
Year Published: 1991
Abstract: We report results of a study of the non-uniqueness of the ITS-90 at temperatures in the range 13.8033 K to 933.473 K (660.323 C) of a variety of capsule-type and long-stem type standard platinum resistance thermometers (SPRTs). The capsule SPRTs were calibrated by comparison techniques and at some fixed points of the ITS-90 the long-stem SPRTs were calibrated at the relevant defining fixed points. In addition, we present results on subrange inconsistencies for several partly overlapping ranges of the ITS-90. Error propagation curves and errors introduced by extrapolations will be discussed also.

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