Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent
1978-06-05
1980-09-23
Karlsen, Ernest F.
Electricity: measuring and testing
Conductor identification or location
Inaccessible
733365, 324 61R, 338 35, G01R 2702, G01R 2726, H01C 1300
Patent
active
042245656
ABSTRACT:
A moisture sensing unit (30, FIG. 1 or 58, FIG. 4) is included within a hermetically sealed package. A localized external portion of the package in close proximity to the unit is cooled while the temperature and the alternating-current capacitance and/or conductance characteristic of the unit are measured. The measured characteristic exhibits a sharp increase at the temperature corresponding to the dew point of the atmosphere within the package. In turn, the dew point temperature is a direct indicator of the moisture content of the package.
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Kovac et al, A New Moisture Sensor for In-Situ Monitoring of Sealed Packages, Solid State Technology, Feb. 1978, pp. 35-39, 53.
Busick, R. C., "Electronic Measurement . . . ", 1965, MS Thesis Ohio State Univ.
Wexler, A., Humidity and Moisture, 1965, pp. 428-432, vol. 2, Reinhold Publications.
Wexler, A., Humidity and Moisture, 1965, vol. 4, pp. 113-117, Reinhold Publications.
Sosniak Jacob
Unger Burton A.
Bell Telephone Laboratories Incorporated
Canepa Lucian C.
Karlsen Ernest F.
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