COMPARISON BETWEEN INMETRO (BRAZIL) AND CENAM (MEXICO) ON BAROMETRIC PRESSURE, RANGE FROM 80 kPa UP TO 115 kPa

Jorge C. Torres-Guzmán, Pablo Olvera-Arana, Luiz H. Paraguassú, Paulo R. G. Couto

Abstract

This paper presents the comparison between the Instituto Nacional de Metrologia, Normalização e Qualidade Industrial (INMETRO, Brazil) and the Centro Nacional de Metrología (CENAM, Mexico) on barometric pressure in the range from 80 kPa up to 115 kPa. This comparison was carried out at the end of 2004 and has been entered within the data base of the Sistema Interamericano de Metrología (Interamerican Metrology System, SIM) as comparison SIM.7.25 P. The pilot laboratory was CENAM. The standards used by the national laboratories were pressure balances, operated in free deformation. The transfer standard used for the comparison was a digital barometer, accuracy class of 0.01 % of full scale. Eight points of pressures were selected and each pressure was measured four times. The results obtained by the two laboratories were in agreement.

Keywords

Comparison, pressure, barometric pressure, pressure balance, SIM

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PWC-2006-TC16-005u.pdf

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IMEKO TC

TC16 - Pressure and Vacuum Measurement

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