Determination of Pressure Coefficients for the Transport Standards of GULFMET DC Voltage Inter-Laboratory Comparison

This paper describes the progress of an on-going GULFMET inter-laboratory comparison of DC voltages at 10 V and 1.018 V (GULFMET.EM.BIPM-K11). The comparison uses a set of two travelling Zener DC reference standards. The Standards and Calibration Laboratory (SCL) of Hong Kong, China, is the pilot laboratory, and the Bureau International des Poids et Mesures (BIPM) and the Korea Research Institute of Standards and Science (KRISS) are the supporting laboratories of this comparison. Both SCL and BIPM have been characterizing the sensitivity coefficients of the two standards. In this paper, pressure coefficients measured by SCL and BIPM are compared and discussed.