WALK-in CONSTANT TEMPERATURE HUMIDITY TEST CHAMBER

FUNCTIONAL FEATURES--WALK-in CONSTANT TEMPERATURE HUMIDITY TEST CHAMBER

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/square meters 

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 

TECHNICAL PARAMETERSWALK-in CONSTANT TEMPERATURE HUMIDITY TEST CHAMBER

Chamber Model	LTHW-6M	LTHW-8M	LTHW-10M	LTHW-15M	LTHW-30M	LTHW-80M
Temp. Range:	Low Temperature: A: 25 degree C ;B: 0 25 degree C;C: -20 25 degree C; D: -40 25 degree C E:-70 25 degree C     High Temperature: 80 25 degree C 80~150 25 degree C  Optional
Humidity Range	20%~98%R.H. 10%~98%R.H./5%~98%R.H. Customize available
Analytic Accuracy	0.1 25 degree C; 0.1% R.H
Uniformity	2.0 25 degree C; 3.5% R.H.
Control Accuracy	0.5 25 degree C; 2.5% R.H.
Temperature Rising/Falling Speed Rate	Temp. Rising Approx 1.0~3.0 25 degree C/min; Temp. Cooling Rate Approx. 0.5~1 25 degree C/min.
Cooling System	Air cooling/water cooling
Protection Devices	Fuse-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 Accessories	Slope for cart, Recorder, Water Purifier, Dehumidifier
Compressor	French Tecumseh Brand, Germany Bizer Brand
Power Source	AC 380 V,50/60HZ,3 phase  5 Wires

STANDARD COMPLIANCEWALK-in CONSTANT TEMPERATURE HUMIDITY TEST CHAMBER

GB/T  2423.1-2001	Environmental testing - Part 2: Test methods - Tests A: Cold
GB/T  2423.2-2001	Environmental testing - Part 2: Test methods - Tests B: Dry heat
GB/T  2423.3-1993	Basic environmental testing procedures for electric and electronic products. Test Ca:Damp heat,steady state
GB/T  2423.4-1993	Environmental testing for electric and electronic products - Part 2: Test method - Test Db: Damp heat,Cyclic
GB/T 2423.9-2001	Environmental testing for electric and electronic products - Part 2: Testing method test Cab: Damp heat Steady state
GB/T  2423.50-1999	Environmental testing for electric and electronic products Part 2: Tests--Test Cy:Damp heat,steady state,accelerated test primarily intended
IEC  60068-2-14	Environmental testing -- Part 2-14: Tests -- Test N: Change of temperature
IEC60068-2-78	Environmental 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/T2423.34-2005	Environmental testing for electric and electronic products Part 2:Test Methods Test Z/AD:Composite temperature/humidity cyclic test
GB/T  14092.1-1993	Environmental condition for machinery products-Warm-damp
MIL-STD-810	Environmental Engineering Considerations and Laboratory Tests