Method and apparatus for flow control for sensor calibration

Details Method and apparatus for flow control for sensor calibration Method and apparatus for flow control for sensor calibration

A - Human Necessities

61

B

A61B 5/00 (2006.01)

Patent

CA 2087807

DOCKET 33233 METHOD AND APPARATUS FOR FLOW CONTROL FOR SENSOR CALIBRATION ABSTRACT OF THE DISCLOSURE The improved gas flow control apparatus controls the flow of multiple gases to a tonometer for calibration of a blood gas or pH sensor and compensates for the failure of gas supply solenoid valves to operate properly in controlling gas flow. Intermediate gas supply solenoid valves select between gas flow of the supplied gas in an open position, and venting to the atmosphere in a closed position. A common selector valve is also provided in the gas flow path to the tonometer to select gas flow from one of the intermediate gas flow valves. A control unit is provided for controlling the operation of the intermediate and common selector valves.

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