Humidity detector calibration method
US6230543A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1999 |
| Grant date | May 15, 2001 |
| Priority date | — |
| Expiry date | Oct 21, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0006
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A humidity detector has a sensor with an electrical characteristic that varies as a function of humidity and a transmitter circuit which produces an output signal in response to the capacitance of the sensor. The humidity detector is calibrated by alternately connecting devices in place of the sensor which simulate performance of the sensor at two reference humidity levels. While each device is present, the transmitter circuit is adjusted so that the output signal indicates the respective reference humidity level. Next, the sensor is connected to the transmitter circuit and exposed to a known humidity level. Then the transmitter circuit is adjusted so that the output signal indicates the known humidity level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.