Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1987-10-13
1988-10-25
Noland, Tom
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
73 1G, 204 1T, 204401, 204407, 204431, G01N 2726, G01D 1800
Patent
active
047794461
ABSTRACT:
The present invention is an improved method and apparatus for condition sensing and displaying a numeric value associated with the sensed condition wherein the improvement comprises (1) circuitry calibrating the display of the numerical value associated with the sensed condition to a numerical value associated with the sensed condition in a normal ambient environment, while the sensor is within the normal ambient environment; and (2) circuitry for calibrating the display of the numerical value of the sensed condition to a numerical value associated with the sensed condition in a known offset environment which is different than the normal ambient environment, while the sensor is in the known offset environment. The calibration of the display of the numerical value associated with the sensed condition in the normal ambient environment and in the known offset environment aiding in protection from a slope error condition and an offset error condition in the display of the numerical value associated with the sensed condition. The calibration circuitry includes switching elements and a microprocessor. In the exemplary embodiment the sensor is an electrochemical oxygen sensor, the normal ambient environment is open air, which contains 21% oxygen, and the known offset environment is pure oxygen. A system for monitoring battery supply is also included.
REFERENCES:
patent: 4109505 (1978-08-01), Clark et al.
patent: 4189725 (1980-02-01), Rowland
patent: 4322964 (1982-04-01), Melguard et al.
patent: 4331862 (1982-05-01), Ryan
patent: 4367133 (1983-01-01), Lauer
patent: 4473458 (1984-09-01), Schwartz et al.
patent: 4521769 (1985-06-01), Dudeck et al.
Hudson Oxygen Therapy Sales Company
Noland Tom
Seiler Jerry R.
Wagner John E.
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