Apparatus for in-situ calibration of instruments that measure fl

Details Apparatus for in-situ calibration of instruments that measure fl Apparatus for in-situ calibration of instruments that measure fl

1991-12-23

1994-01-11

Noland, Tom

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

73300, G01F 2500, G01F 2318

Patent

active

052770540

ABSTRACT:
The present invention provides a method and apparatus for in-situ calibration of distance measuring equipment. The method comprises obtaining a first distance measurement in a first location, then obtaining at least one other distance measurement in at least one other location of a precisely known distance from the first location, and calculating a calibration constant. The method is applied specifically to calculating a calibration constant for obtaining fluid level and embodied in an apparatus using a pressure transducer and a spacer of precisely known length. The calibration constant is used to calculate the depth of a fluid from subsequent single pressure measurements at any submerged position.

REFERENCES:
patent: 4843883 (1985-07-01), Glover et al.

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