Bilateral comparison linking to CCM key comparison in the pressure range up to 7 MPa

Project Description

The aim of that pneumatic pressure comparison project is to establish link between CMI and UME that will participate in the two separate phases of EUROMET key comparison project N° 439 in the gauge pressure range from 50 kPa to 7 MPa. In the framework of that project, an interlaboratory comparison will be realised using three different transfer standards that have the nominal effective areas of 10 cm², 0.8 cm² and 0.08 cm².

EUROMET project 439 has two phases with independent three transfer standards. The transfer standards of the phase A will be two piston cylinder assemblies having the nominal effectiveareas of 0.8 cm² and 0.08 cm², working pressure up to 7 MPa. Phase B will be performed using 10 cm² piston cylinder transfer standard that is working up to 1 MPa. UME is going to participate in phase A and CMI an phase B. At the same time ther will be a CCM key comparison in the same pressure range with similar transfer standards that every laboratory can perform both measurements.

The transfer standards usec in that project are the same type of instruments and are CMI (10cm² transfer standard) or UME (0.8 and 0.08 cm² transfer standards) property. The followed measurement procedure is going to be the same as CCM key comaprison.

Work schedule : June 1999 - February 2000