Method and device for calibrating a humidity sensor and sensor arrangement having humidity sensor capable of calibration
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United States of America Patent
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Jun 8, 2010
Grant Date -
Dec 2, 2004
app pub date -
Jan 3, 2003
filing date -
Jan 30, 2002
priority date (Note) -
Expired
status (Latency Note)
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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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