Hydraulic gauge pressure proficiency test in the range from 7 MPa to 70 MPa for Mexican accredited laboratories

P. Olvera-Arana, J. C. Torres-Guzman, A. Navarro-Nateras, J. Aranzolo-Suárez

Abstract

At the end of 2006, the Pressure Group of the Centro Nacional de Metrología CENAM, Mexican National Metrology Institute, organized and piloted a proficiency test in hydraulic gauge pressure in the range from 7 MPa to 70 MPa for accredited laboratories by the Entidad Mexicana de Acreditación (ema), Mexican Accreditation Body. For the proficiency test, the pilot laboratory (CENAM) carried out three calibrations of the transfer standard; the first one at the beginning of the proficiency test, the second at the middle and the last one at the end of the program. With the measurements made by CENAM the reference values were established, including error and uncertainty. The deviations for each laboratory were compared against the reference values and the compatibility of results was calculated, for each participating laboratory, by means of the normalized error equation method. The measurements were carried out by each participant laboratory with their own resources (personnel, calibration systems, environmental conditions and in their installations). Laboratories located all around the country participated and most of the laboratories with this range of measurement participated. The proficiency test started in November 2006 and finished in March 2007.

Keywords

pressure, proficiency tests, hydraulic gauge pressure

Download

IMEKO-TC16-2007-082u.pdf

DOI

-

IMEKO TC

TC16 - Pressure and Vacuum Measurement

Back to the proceedings