Patent ID: 9519078
Filing Date: 2016-12-13
CPC Classification: G01F,G01W

Claim Text:
1. Device ( 1 ) for checking the calibration of catching instruments measuring rainfall intensity, characterized in that it comprises a plurality of containers ( 2 a , 2 b , 2 c ) having a predetermined internal volume (V 1 , V 2 , V 3 ), the volume of at least two of said containers being different from each other, said containers being adapted to contain respective amounts of a liquid, wherein each container ( 2 a , 2 b , 2 c ) is provided with a single exhaust nozzle ( 3 a , 3 b , 3 c ) adapted to put the internal volume (V 1 , V 2 , V 3 ) of said container ( 2 a , 2 b , 2 c ) in fluid communication with an outer environment such to allow said liquid when discharged from said nozzle ( 3 a , 3 b , 3 c ) to flow out by gravity in a substantially horizontal direction, each one of said containers ( 2 a , 2 b , 2 c ) further comprising air intake means ( 4 a , 4 b , 4 c ) adapted to put the internal volume (V 1 , V 2 , V 3 ) in fluid communication with the outer environment in order to adjust the air pressure inside the container, to keep a piezometric head constant at the height of said nozzle ( 3 a , 3 b , 3 c ) independently of the change of the liquid level in said container ( 2 a , 2 b , 2 c ) during its emptying, in order to obtain a contemporaneous check of the dynamic and volumetric calibration of said catching instruments.