This document gives a general guidance for realizing the Provisional Low Temperature Scale of 2000 (PLTS-2000) by establishing and measuring melting pressures of 3He in the range from 0.902 mK to 1 K. It draws on published techniques and designs, and is intended to be suitable for application in national measurement institutes, as well as more generally in ultra-low temperature laboratories where absolute pressure standards are not normally available.
The document describes methods by which the PLTS-2000 can be realized successfully. However, it should not be taken as laying down how it must be done. The description of any particular apparatus is more for illustration than prescription, and considerable variation is often seen. Likewise, quoted numerical data and dimensions are mostly for guidance only.