2006
DOI: 10.1590/s1413-70542006000600019
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Montagem e acurácia de um sistema experimental de pesagem para calibração de sensores de umidade do solo

Abstract: O presente trabalho descreve os procedimentos de desenvolvimento e teste de um sistema de pesagem de grande capacidade para utilização em gravimetria como método padrão de calibração de sensores de umidade do solo. O trabalho foi desenvolvido no Laboratório de Irrigação e Drenagem, Centro de Ciências Agrárias e Ambientais da Universidade Federal da Bahia, campus de Cruz das Almas (12º40'S, 39º30'W), BA. O princípio de funcionamento do sistema de pesagem baseia-se no seu componente principal, a célula de carga.… Show more

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Cited by 3 publications
(2 citation statements)
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“…Transpiration was calculated directly by mass difference since the soil surface was covered with plastic to prevent evaporation. The maximum errors of the weighing system are shown in Table 1, these errors were detected by means of the test recommended by Wheeler & Ganji (1996) and applied by Vellame & Oliveira (2005) and Santos et al (2006).…”
Section: Methodsmentioning
confidence: 99%
“…Transpiration was calculated directly by mass difference since the soil surface was covered with plastic to prevent evaporation. The maximum errors of the weighing system are shown in Table 1, these errors were detected by means of the test recommended by Wheeler & Ganji (1996) and applied by Vellame & Oliveira (2005) and Santos et al (2006).…”
Section: Methodsmentioning
confidence: 99%
“…For the calibration of the weighing lysimeter, masses of 1,000 and 5,000 grams were prepared using heavy bags of gravel on an analytical balance. The weighing system was calibrated according to the method applied for the calibration of a mass measuring system, by SANTOS et al (2006).…”
Section: Calibrationmentioning
confidence: 99%