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Session Topic: 6E, Pressure Session

   

Paper Title: Pressure Standards Comparison Between Germany and Mexico (Primary and Secondary Laboratories)

   

Date & Time: WEDNESDAY, August 7, 2002

 

8:30 - 10:00am PARALLEL SESSIONS - SESSION 6

   

Speaker: Jorge C. Torres-Guzmán CENAM

Email: jtorres@cenam.mx

   

A pressure comparison was carried out among the primary laboratories of Mexico and Germany and secondary laboratories of Mexico and Germany (at least 3 secondary laboratories from each country participated), in order to estimate the level of agreement for the realization of the quantity and the uncertainty associated to its measurement. The comparison was carried out from 10 MPa up to 100 MPa (oil), using an electronic comparison standard with 1·10-4 of full-scale accuracy. The comparison was performed among laboratories using similar standards. The DKD (German Calibration Services) and SNC (Mexican National Calibration System) secondary laboratories have always had a keen interest in comparing their capabilities to realize the quantity of pressure, this was a welcome opportunity to perform a comparison with laboratories from other country. The results of the measurements made by the participating laboratories were entered into the data file provided for the comparison and sent to the coordinating laboratory. The uncertainties calculated by each laboratory were based mainly on three contributing elements: the standard used by the laboratory, repeatability and resolution of the comparison standard (instrument). Each laboratory applied all necessary corrections to the measured pressure and included the effect of influence quantities into the uncertainty evaluation. The results obtained and the deviations graphs that include the uncertainty for each participating laboratory are presented in this document.

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