Progress Report on an International Intercomparison in the Pressure Range 10 kPa to 140 kPa

Abstract

Results are summarized from thirteen laboratories which took part in the first four phases of an international intercomparison of pressure measurement standards in the range 10 kPa to 140 kPa, carried out under the auspices of the BIPM. The transfer standard was a gas-operated pressure balance (piston gauge). All participants took measurements in the absolute mode; several also took measurements in the gauge mode. The transfer standard showed good repeatability and long-term stability, and revealed some unexpected and significant differences between some of the participants.