Method and device for calibrating a humidity sensor and...

Details Method and device for calibrating a humidity sensor and... Method and device for calibrating a humidity sensor and...

2003-01-03

2010-06-08

Rogers, David A. (Department: 2856)

Measuring and testing

Instrument proving or calibrating

Fluid pressure

C073S001610, C073S001620, C073S001880

Reexamination Certificate

active

07730759

ABSTRACT:
For calibrating a humidity sensor, the latter is used to measure the relative humidity (U1, U2) at each of two known gas pressure values (P1, P2), likewise to be measured if necessary. At the same time, other ambient conditions are kept constant. A correction value for correction of the measured values of the humidity sensor to be subtracted from the latter is then obtained from the formula: k=((P1/P2)*U2−U1)/(P1/P2−1). The humidity sensor is thus capable of calibration without measurement of the actual humidity value.

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Hardy, Bob, “Relative Humidity Uncertainty Analysis of the Thunder Scientific Model 2500 Two Pressure Humidity Generator”, Thunder Scientific Corp., 1998, pp. 1-13.
“Model 2500 Benchtop/Mobile Two Pressure Humidity Generator”, Thunder Scientific Corp., pp. 1-4.
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Cubberly, William H., “SAE Dictionary of Aerospace Engineering”, 1992, Society of Automotive Engineers, pp. 106-107.
“Relative Humidity Question”, Internet email corresponance from Dr. Steve Ackerman, Professor of Atmospheric and Ocean Sciences at the University of Wisconsin-Madison.

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