Veeder-root LLC

Stephen G Norris

In order to determine the contents of a tank fitted with liquid level sensors and metering equipment, a microprocessor is programmed with an algorithm employing a mathematical expression for initially computing data value based on liquid level sensor outputs and tank dimensions, which data values are compared with actual volumetric amounts of liquid in the tank derived from the metering equipment so as to determine errors in a calibration characteristic for converting the sensor outputs into volumetric amounts. The calibration characteristic is refined by an iterative technique where constants in the mathematical expresson are varied, in accordance with the program so as to make the computed data values closer to the actual volumetric amounts derived from the metering equipment for respective liquid levels in the tank.

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Kinnoull, United Kingdom

Stephen G Norris