Precise rain gauge and methods of calibration

Details Precise rain gauge and methods of calibration Precise rain gauge and methods of calibration

1997-12-24

1999-04-27

Chilcot, Richard

Measuring and testing

Meteorology

Precipitation

73 116, 73 142, G01W 100

Patent

active

058981101

ABSTRACT:
A rain gauge and methods of tilt time calibration and flow rate calibration. The rain gauge comprises a pair of buckets separated by a darn rotatably attached to a base. A threaded balance weight is used to calibrate the rain gauge to equalize the tilt times of the buckets. A pendulum weight turns on a threaded stud attached to a frame is used to calibrate the rain gauge for different flow rates of water reflecting rainfall intensities from 2 in/hr to 12 in/hr. The buckets' outflow is directed into graduated cylinders, which may also be used during calibration. A pair of uprights support a funnel platform having a funnel platform aperture. The funnel platform aperture is sized to precisely hold a funnel in position relative to the bucket assembly, thereby permitting different buckets to be used without having to re-calibrate the rain gauge. A cover having at least one cover aperture is provided which permits visually checking the operation of the rain gauge without having to remove the cover.

REFERENCES:
patent: 1308855 (1919-07-01), Moore
patent: 3243999 (1966-04-01), Barker
patent: 3309710 (1967-03-01), Smoot et al.
patent: 3485096 (1969-12-01), Miller
patent: 3943762 (1976-03-01), Baer

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