METHODOLOGY EMPLOYED TO CALIBRATE VACUUM SENSORS IN INMETRO – BRAZIL

T. P. Franklin, B. A. Girardi , J. S. Oliverira, L. R Cinelli

Abstract

The present study it consists of a methodology developed in the Instituto Nacional de Metrologia, Normalização e Qualidade Industrial - INMETRO - (Pressure Laboratory -LAPRE) for the calibration of the vacuum sensors such as: capacitive diaphragm manometers, pirani, spinning rotor gauge and others. The used methodology is based on a program of calibration developed in the INMETRO/LAPRE having as principle the comparative method the transference standards. The method uses the analysis statistics as support. The calibration of these measurers in the LAPRE initiates the national metrologic chain for low pressures. Due to the great amount of instruments to be calibrated in the country it is necessary to spread, to stimulate and to guide the techniques of calibration of these sensors. With the transference of the jobs of calibration of these sensors after the certification of these according to the requisite for laboratories of norm ISO-17025 consequently the traceability and metrologic reliability of the measurements will be evidenced. Additionally the method makes possible also a study at any time of the repetitiveness of the calibrated instrument.

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IMEKO TC

TC3 - Measurement of Force, Mass, Torque, and Gravity

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