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METROLOGICAL BEHAVIOUR OF BULK WATER METERS UNDER DIVERSE INSTALLATION CONFIGURATIONS REA
Palau,Carmen V.; Peralta,Iban B.; Manzano,Juan; Azevedo,Benito M. de; Bomfim,Guilherme V. do.
ABSTRACT As the correct measurement is an essential part of water management, this study describes the metrological behaviour of a range of bulk water meters under different installation configurations. The meters analysed included the horizontal and vertical Woltman, singlejet, tangential and proportional. Configurations included straight pipe lengths; gate and butterfly valves at different degrees of closure, rotations and distances from the meter; meter with volumetric and reducing valves; reverse installation; and meter rotated 90° from the horizontal setting. The metrological behaviour under different flow conditions was analysed by comparison with electromagnetic and volumetric meters (ISO-4064). The horizontal Woltman showed no permissible errors...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hydrometry; Water consumption; Pressurised irrigation.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000600893
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Development and evaluation of an automated system for testing current meters AGRIAMBI
Saretta,Ezequiel; Camargo,Antonio P. de; Botrel,Tarlei A.; Pinto,Marinaldo F.; Katsurayama,Geancarlo T.; Frizone,José A..
ABSTRACT Current meters are equipment widely used for estimating flow velocity in rivers and streams. Periodic calibrations of current meters are important to ensure the quality of measurements, but the required testing facilities are complex and only available in a few institutions. However, advances in electronics and automation may contribute to developing simple and reliable calibration systems. Thus, this study aimed to develop an automated system for testing current meters, which consisted of a trapezoidal channel, a step motor, a tow car and a management system, composed of a supervisory application and microprocessed modules to control the motor and the data acquisition. Evaluations of the displacement velocity showed that it matched the reference...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hydrometry; Electronics; Automation; Calibration.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000200181
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