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Title: Apparatus for in-situ calibration of instruments that measure fluid depth

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. 8 figures.
Authors:
Publication Date:
OSTI Identifier:
5179731
Report Number(s):
US 5277054; A
PPN: US 7-813339
DOE Contract Number:
AC06-76RL01830
Resource Type:
Patent
Resource Relation:
Patent File Date: 23 Dec 1991
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; LEVEL INDICATORS; CALIBRATION; DISTANCE; PRESSURE MEASUREMENT; TRANSDUCERS; MEASURING INSTRUMENTS 440800* -- Miscellaneous Instrumentation-- (1990-)