Method for sensing humidity in a tape library
US6469525B2 · kind B2 · utility
3Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2001 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Jan 4, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/223
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electrical system for measuring humidity which is capable of measurements accurate to +/−6 percent from board to board. The accuracy provided by this electrical system makes it possible to correlate errors in data on backup magnetic tapes to variations in humidity. The electrical system consists of an oscillator whose frequency is dependent on the capacitance of a capacitor used in the circuit. The capacitance value of the capacitor is dependent on the relative humidity. The frequency of the oscillator is translated to a humidity value by an electronic counter and a microprocessor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.