Jost Engert et al 2007 Metrologia 44 40 doi:10.1088/0026-1394/44/1/006
Jost Engert, Bernd Fellmuth and Karl Jousten
Show affiliationsA new 3He vapour-pressure scale, called PTB-2006, has been established for the temperature range from 0.65 K to 3.2 K. The PTB-2006 removes the thermodynamic inconsistency of the International Temperature Scale (ITS-90) below 1 K by relying on the PLTS-2000. Between 1 K and 2 K the new scale is derived from an interpolation based on the thermodynamic vapour-pressure equation for 3He. At temperatures above 2 K it is nearly identical with the ITS-90. The derivation of the PTB-2006 is described in detail and an uncertainty budget is presented with respect to thermodynamic temperature.
06.30.-k Measurements common to several branches of physics and astronomy
Issue 1 (February 2007)
Received 15 September 2006
Published 9 January 2007
Jost Engert et al 2007 Metrologia 44 40
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