Temperature chambers used for Quality assurance of products
Temperature change is one of the most frequent tests applied to a device. Temperature cycling is the process in which a device is exposed to many cycles of changing temperatures between specified extremes at relatively high rates of change fatiguing and causing inferior products to cease functioning correclty. It provides a superior method of determining failure and analyze reliability of a device. Cycling will indicate at what temperature, both high and low, a device will cease to operate correclty. Most manufacturers have a standard high temperature range from +177°C to +170°C for reach-in chambers and welded walk-ins; nevertheless, it is possible for higher temperatures to be achieved with special construction and materials. To obtain low temperatures, manufacturers offer several refrigeration options for Temperature test chambers. Liquid Nitrogen (LN2) is one popular refrigerant that allows temperatures to be as low as -184°C. Carbon Dioxide (CO2) is another popular refrigerant however it can only achieve a low temperature of -68°C. A final option for Thermal temperature test chambers is mechanical refrigeration. Mechanical refrigeration utilize compressors to lower the temperature of the chamber and is available in two configurations: single stage and cascade. Single State Thermal temperature test chambers uses only one compressor and is able to ramp the temperature down to -40°C. Cascade Thermal temperature test chambers use two compressors in order to bring the chamber temperature down to -73°C or lower. A cascade refrigeration system comprises of two interdependent refrigeration systems. The low-stage provides cooling to the temperature chamber interior through a finned evaporator coil, which is placed in the air plenum. The high-stage creates cooling to the cascade condenser.

There are quite a few brands of Temperature test chambers in the U.S.A. Should you be unable to afford to purchase Brand New, Certified Refurbished Chambers with a Warranty could be a good way to go.

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