Measuring and testing – Simulated environment
Patent
1997-02-14
1998-10-20
Noori, Max H.
Measuring and testing
Simulated environment
73147, 73 2901, G01N 1700
Patent
active
058249184
ABSTRACT:
A method and apparatus for controlling the level of relative humidity within a corrosion test apparatus is disclosed. The corrosion test apparatus includes a testing chamber, an atomizer which fogs the testing chamber with de-ionized water, a sensor which senses a relative humidity level within the testing chamber, a humidifying valve coupled to the atomizer which regulates a supply of pressurized air to the atomizer, and a controller coupled to the sensor and to the humidifying valve. The controller includes a heating control loop mechanism which generates an output signal proportional to a differential between a relative humidity set point and the relative humidity level. The humidifying valve regulates the supply of operating medium to the atomizer based on the output signal. The atomizer regulates the amount of operating liquid fogged into the test chamber based on the supply of operating medium received from the humidifying valve. The corrosion test apparatus also includes a dehumidifying valve which regulates a supply of ambient air to the testing chamber based on the differential between the relative humidity set point and the relative humidity level, and a passive, low-cost, low maintenance air amplifier coupled to the dehumidifying valve which draws ambient air into the testing chamber.
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Noori Max H.
The Singleton Corporation
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