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Type: Artigo de evento
Title: Calibration And Validation Of A New Aspirated Psychrometer For Technological Development Of A Humidifier
Author: De Barros Neiva A.C.
Dos Reis E.
Sanchez C.G.
Abstract: The main purpose of this work is to present the manufacturing, calibration and validation of a system for wet and dry bulb temperature measurements obtained on a new psychrometer. The calibration has lead to the adjustment of the appropriate psychrometer coefficient for the developed psychrometer, as a function of the wet bulb temperature, which fits best with experimental data, obtained on the range from 34% to 87% RH and 15°C to 30°C. Another set of experimental points on this range was used for evaluation of the psychrometer uncertainty. An electronic hygrometer was calibrated simultaneously, and its calibration was also evaluated. The uncertainty of the Relative Humidity obtained in the calibration of the psychrometer was found to be only slightly higher than the uncertainty for the electronic hygrometer. For the wet-bulb temperature determination, the hygrometer presents itself as more precise, while the psychrometer was more accurate. Either could be used for technological development of the humidifier, but the psychrometer delivers a direct measurement of the wet-bulb temperature, independent of the local pressure and dry-bulb temperature, which affects the calculation obtained from the hygrometer data. Copyright© (2006) by the International Measurement Federation (IMEKO).
Rights: fechado
Identifier DOI: 
Date Issue: 2006
Appears in Collections:Unicamp - Artigos e Outros Documentos

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