In the last years at IMGC-CNR, a new continuous expansion system, equipped with a fixed conductance, has been designed, assembled and characterized. It replaces the previous system, which was based on the same working principle, but equipped with a variable conductance. The present report aims to describe the most recent checks performed on the new continuous system in order to verify its metrological reliability in the range from 3•10-4 Pa up to 9•10-2 Pa. The first step regards an internal IMGC-CNR comparison with the static expansion system; then the results of a bilateral comparison between NPL and IMGC-CNR (January 2004 - July 2004) are presented and discussed. Finally the measurement procedures and the results of a bilateral comparison NPL–INRIM (June 2005 - August 2005) are presented.
|Titolo:||Recent measurements performed by the INRIM fixed-conductance continuous expansion system|
|Autori interni:||MARI, DOMENICO GIANLUCA|
|Data di pubblicazione:||2006|
|Appare nelle tipologie:||5.12 Altro|