Continuous blending for gas analyzer calibration
First Claim
1. A method for calibrating a plurality of gas analyzers, comprising:
- providing a first gas analyzer that measures a first concentration of a first gas;
providing a second gas analyzer that measures a second concentration of a second gas;
providing a span gas that includes a mixture of said first gas and said second gas;
supplying a calibration mixture to both said first gas analyzer and said second gas analyzer, wherein said calibration mixture includes said span gas and a non-reactive zero gas; and
varying at least one of a third concentration of said non-reactive zero gas and a fourth concentration of said span gas in said calibration mixture as a function of time.
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Accused Products
Abstract
A method for calibrating a plurality of gas analyzers includes providing gas analyzers that measure the concentrations of gases. A span gas includes a mixture of the gases. A calibration mixture is supplied to the gas analyzers that includes the span gas and a non-reactive zero gas. At least one of a concentration of the non-reactive zero gas and a concentration of the span gas is varied in the calibration mixture as a function of time. The gas analyzers generate sets of readings of the concentrations of the gases. A controller generates response functions of the gas analyzers based on the sets of readings. The controller determines exact concentrations of the gases in the calibration mixture based on a set of readings from a gas analyzer with a predetermined response to a gas. The controller calibrates the gas analyzers based on the response functions and the exact concentrations.
16 Citations
20 Claims
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1. A method for calibrating a plurality of gas analyzers, comprising:
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providing a first gas analyzer that measures a first concentration of a first gas;
providing a second gas analyzer that measures a second concentration of a second gas;
providing a span gas that includes a mixture of said first gas and said second gas;
supplying a calibration mixture to both said first gas analyzer and said second gas analyzer, wherein said calibration mixture includes said span gas and a non-reactive zero gas; and
varying at least one of a third concentration of said non-reactive zero gas and a fourth concentration of said span gas in said calibration mixture as a function of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A self-contained divider for calibrating a plurality of gas analyzers, comprising:
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a span gas supply that includes a mixture of a first gas and a second gas;
a diluent gas supply that includes a non-reactive zero gas;
at least one diluent flow controller that controls a first concentration of said non-reactive zero gas in a calibration mixture of said first gas, said second gas, and said non-reactive zero gas; and
at least one span gas flow controller that controls a second concentration of said mixture in said calibration mixture, wherein at least one of said first concentration and said second concentration is varied in said calibration mixture as a function of time. - View Dependent Claims (18, 19, 20)
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Specification