FIELD: testing engineering.
SUBSTANCE: device comprises unit for securing the specimen, means for supplying water to the specimen, means for detecting leakage, means for generating air flow blowing around the specimen, and means for measuring temperature. The unit for fastening the specimen is made of a metallic detachable structure. The opening in the bottom ring receives the gage for measuring the surface resistance which is connected with ohmmeter. The means for supplying water is made of a unit composed of tank and member for temperature control and is mounted for permitting change of its level inside the tank. The means for generating air flow is made of fan for made for permitting control of its position in height, inclination angle, and temperature of air flow. The method comprises conditioning the specimen at a constant temperature and humidity, applying water on the specimen, and producing temperature difference in the bulk of the specimen. The air flow is simultaneously directed to the specimen. During testing, the temperature of the outer and inner surfaces of the specimen is recorded simultaneously with the recording of the surface and bulk resistance of the specimen. The time period that the specimen takes to be wetted is judged by the records obtained by the potentiometer and ohmmeter.
EFFECT: enhanced precision.
4 cl, 7 dwg, 2 tbl, 2 ex
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Authors
Dates
2007-10-20—Published
2006-05-17—Filed