SIM vacuum comparison from 133.3 Pa to 13.33 kPa |
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| J. C. Torres-Guzmán, L. H. Paraguassú, P. R. G. Couto, I. L. Bezerra |
- Abstract:
- This comparison constitutes the second part of the first vacuum comparison among National Metrology Institutes (NMI) within the Interamerican Metrology System (SIM). Each laboratory used its national standards for the compared range. The Centro Nacional de Metrología (CENAM, Mexico) used a reference standard (comparison system type) and the Instituto Nacional de Metrologia, Normalização e Qualidade Industrial (INMETRO, Brazil) used a similar reference standard (comparison system type). The comparison started in December 2004 and finished in March 2005. The objective of the comparison was to estimate the level of agreement for the realization of the quantity and the uncertainty associated to its measurement.
One transducer (Capacitive Diaphragm Gauge) was used as transfer standard; the comparison range was selected from 133.3 Pa up to 13.33 kPa. The relevant aspects of the measurement protocol are summarized in the paper but were widely developed in the comparison reference documents. The gas used for the comparison was nitrogen. The measurements started at the lowest pressure and the pressure was increased up to the maximum range. The analysis of measurements comparability between the laboratories is included here. This bilateral comparison has been entered within the SIM data base as a pilot comparison SIM.7.26 P. - Keywords:
- comparison, vacuum, capacitive diaphragm gauge, SIM
- Download:
- IMEKO-TC16-2007-093u.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC16
- Event name:
- Cultivating Metrological Knowledge
- Title:
- 3rd Conference on Pressure Measurement (together with 20th TC3 Conference on Measurement of Force, Mass and Torque & 1st TC22 Conference on Vibration Measurement)
- Place:
- Merida, MEXICO
- Time:
- 27 November 2007 - 01 December 2007