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Walk-in Constant Temperature Humidity Test Room

Walk-in Constant Temperature Humidity Test Room



Internal Test Chamber is designed and made of SUS#304 high-low temperature resistance stainless steel;

Insulation material is introduced frame retardant strength PU Polyurethane foam insulation material; 

Observation Window is designed and made with vacuum glass observation window on door, and door frame with electric heat resistant, anti-frosting, anti-condensing devices to enable test technician can observe testing specimen in testing in an easy way. 

Cable Port with its diameter at 50mm is designed on left of testing chamber, and processed with silicon filling and sealing as well as designed with stainless steel cover for safety purpose. 

Walk-in environmental test, to guarantee safety testing operation, is designed with Explosion-proof pressure releasing function with 1 ventilation hole on left or right side of test chamber for pressure releasing purpose.  

Sealing process for test chamber is introduced with silicone sealing strip to provide an excellent sealing performance. While push-in testing holder with good loading bear is made for internal environmental test. 

A close-type mechanical pressure balance & regulation device is introduced to balance difference between inside and outside of test chamber to protect testing chamber.  

4 arrays of explosion-proof and energy-save lamp is installed inside of test chamber for observation while steel base frame for test chamber with loading bear no less than 2000kg/m²

Air Supply System with constant air flow as well as uniform air distribution is driven by branded asynchronous motor, multi-blades centrifugal circulating blower as well as high-performance sensors. 

Refrigeration System is introduced with French Tecumseh compressor for dehumification while Germany Bitzer compresor for refrigeration system, while uses environmental friendly refrigerant HFC R404A, R23A. 

Heating System is designed with SSR (Solid-State Relay) & controller to provide high accurate non-contact switch control, and the heating tube introduced with Naked Wire Nickel Chromium Alloy Electric Heating Tube. 

Control Method for walk-in Test Chamber is introduced with Programmable high accuracy micro computer controller, use cold mirror dew point instrument control temp. humidity system. cold mirror dew point instrument control temp. Humidity system.

P.I.D., BTC balance temperature control method(thermal compensation function)+DDC digital cold control +DEC digital electric control (Temperature change test program setting) 


Temp. Range: Low Temperature: A: 25℃;B: 0;C: -20; D: -40 E:-70     High Temperature: 80 80~150 Optional)
Humidity Range 20%~98%R.H. (10%~98%R.H./5%~98%R.H. Customize available) 
Analytic Accuracy 0.1; 0.1% R.H
Uniformity ±2.0; ±3.5% R.H.
Control Accuracy ±0.5; ±2.5% R.H.
Temperature Rising/Falling Speed RateTemp. Rising Approx 1.0~3.0 /min; Temp. Cooling Rate Approx. 0.5~1/min.
Cooling SystemAir cooling/water cooling 
Protection DevicesFuse-free switch, overloading protection switch  for compressor,high and low voltage coolant protection switch, over-humidity & over-temperature protection switch, fuses,  fault warning system, water short storage warning protection
Optional AccessoriesSlope for cart , Recorder, Water Purifier, Dehumidifier
Compressor French Tecumseh Brand, Germany Bizer Brand
Power Source  AC 380 V,50/60HZ ,3 5 Lines


GB/T  2423.1-2001 IEC60068-2-1Environmental testing - Part 2: Test methods - Tests A: Cold
GB/T  2423.2-2001 IEC60068-2-2Environmental testing - Part 2: Test methods - Tests B: Dry heat
GB/T  2423.3-1993 IEC 60068-2-3Basic environmental testing procedures for electric and electronic products. Test Ca:Damp heat,steady state
GB/T  2423.4-1993 IEC 60068-2-30Environmental testing for electric and electronic products - Part 2: Test method - Test Db: Damp heatcyclic ( 12h+12h cycle)
GB/T 2423.9-2001 IEC 60068-2-56Environmental testing for electric and electronic products - Part 2: Testing method test Cab: Damp heat Steady state
GB/T  2423.50-1999 IEC 60068-2-67 Environmental testing for electric and electronic products Part 2: Tests--Test Cy:Damp heat,steady state,accelerated test primarily intended
IEC  60068-2-14Environmental testing -- Part 2-14: Tests -- Test N: Change of temperature
IEC60068-2-78Environmental Testing - Part 2-78: Tests-Test ca B: Damp Heat, Steady State
IEC 60068-3-4:2001 Environment Tests for Electric and Electronic Products-Guidance for Damp Heat Tests
GB/T2423.34-2005Environmental testing for electric and electronic products Part 2:Test Methods Test Z/AD:Composite temperature/humidity cyclic test
GB/T  14092.1-1993Environmental condition for machinery products-Warm-damp
MIL-STD-810 Environmental Engineering Considerations and Laboratory Tests

Video : https://www.youtube.com/watch?v=uzDnSw1pt6A&t=32s