80L to 1000L -80C-150C Laboratory Programmable Climate Temperature Humidity Test Chamber 

Temperature humidity test chamber is used to test various types of materials for their tolerances of heat, cold, dry, humidity. It is applied for quality inspection for all types of electronic products, electric appliance, and products from communication, instrument, automobile, plastic, metal, food, chemical, building materials, medical and aerospace industries.  

Temperature and humidity testing help to determine the behavior of the components in severe test conditions and environments that involve fluctuatingenvironment, high temperature, and different relative humidity. The tests can be done with constant temperature and humidity in a static state and can bedone in a dynamic state where the moisture is used to induce a failure of the components or materials.

Main Features

1.The constant temperature and humidity test box is mainly composed of control panel, distribution panel, insulation layer, air supply fan, heater, humidifier and refrigeration unit. The main specifications can be divided into 6 standard sizes and 10 specifications under different conditions.

2.The controller can be connected to the computer through LAN interface. Users can design programs on the computer screen, collect test data and records, call program execution, remote control machine switch and other functions.

3.The use of multi-wing air supply fan strong air circulation, to avoid any dead angle, so that indoor temperature and humidity distribution is uniform.

4.Complete safety protection device, if abnormal conditions occur, the controller screen will automatically display the fault status, cut off the power switch, and provide troubleshooting methods.

Model Available

Model	LITH-80(A~F)	LITH-150(A~F)	LITH-225(A~F)	LITH-408(A~F)	LITH-800(A~F)	LITH-1000(A~F)
Internal Dimension WxHxD (mm)	400x500x400	500x600x500	600x750x500	600x850x800	1000x1000x800	1000x1000x1000
Internal Dimension WxHxD (mm)	950x1650x950	1050x1750x1050	1200x1900x1150	1200x1950x1350	1600x2000x1450	1600x2100x1450
TemperatureRange	Low Temperature(A:25°C  B:0°C  C:-20°C  D:-40°C  E:-60°C  F:-70°C)  High Temperature 150°C
HumidityRange	20%~98%R.H.(10%-98% R.H. / 5%-98% R.H ,is a special optional condition, need Dehumidifier)
Analytic Accuracy/ Distribution uniformity of temperature and humidity	0.1°C; 0.1% R.H/±2.0°C; ±3.0% R.H.

A.Testing Parameter

Temperature range	25℃～+150 ℃(Air-cooled type) Can be customized to below 0℃
Humidity range	20%-98% RH (the distribution range is as follows)
The cooling rate (no-load)	About 1℃/min
The heating rate (no load)	About 3℃/min
Temperature stability	±0.5℃
Analytical accuracy of temperature	0.01℃
Precision of humidity control	±2%R.H
Temperature uniformity	±2.0℃
Humidity uniformity	≤±3%R.H（+2、-3%RH）
Working noise	A sound level is less than 75 dB (A) (measured in a soundproof room with 25 C ambient temperature and less echo; measured the average value of 8 points by A weighting; measured the level of each test point is 1 metre from the noise source and the height is 1 metre from the ground).

B.Machine Structure

Material of inner and outer boxes	SUS # 304
Outer box light source	High brightness lamp
Structural design of stratosphere	Effective avoidance of condensation at the top of the box
Observation Window	Observation sample use (W*L 28*35 cm)
Anti-sweat design of windows	Electrical heating device to prevent condensation of water and gas (40 W)
Test Holes	Can be used for connect external test power cord and signal (diameter 50 mm)
Machine pulley	Pulleys are movable and positioned with strong bolts (200Kg/wheel)
Insulation Layer	Rigid polyurethane foam (its advantages are: 1. High efficiency and energy saving, seamless after filling, strong bonding after curing. 2. Seismic and compressive resistance, no cracking, no decay, no falling off after solidification. 3. It has ultra-low temperature heat conductivity, weather resistance and heat preservation. 4. High efficiency insulation, sound insulation, waterproof and moisture-proof after curing. 5. waterproof performance is good, because the foam hole is closed, the sealing rate is 95%, and the rainwater will not permeate through the hole.
Inner rack	Movable adjustable grids and two stainless steel strip grids (5.0 cm per grille)
Box door	Double-channel heat insulation and tight gas to effectively isolate external temperature leakage

C.Safety Protection System

Leakage/Surge Protection	FUSE. RC electronic surge protection for leakage circuit breakers
Internal self-automatic detection and protection device of controller	1. Data transmission detection between microcomputers 2. Temperature/Humidity Sensor→ circuit break or short circuit (+/- OVER) 3. Layer 1 high/low temperature over-temperature protection → Settings for operation control high and low temperature over-temperature protection
Fault Detection and Control Interface(Automatic Detection and Protection Device for External Faults)	1. High Temperature Overtemperature Protection of the Second Layer→Electronic high temperature overtemperature protection device 2. Layer 3 High Temperature Overtemperature Protection→High temperature overtemperature protection device 3. Protection of water-cut incineration→Humidity water cut-off protection and electric heat water cut-off air incineration protection 4. Compressor protection→Refrigerant pressure protection and overload protection. 5. Extended Protective Device→Reserve two sets of fault detection input expansion protection devices for use.
Fault Abnormal Protection	Cut off control power supply and fault reason indication and alarm output signal when abnormal fault occurs.
Active Water Shortage Indicator	Initiative prompt for lack of water on machine.
Dynamic High and Low Temperature Protection	Dynamic adjustment of high and low temperature protection value with setting conditions.
Normal Temperature Protection	After shutdown, the test area of the machine will be protected automatically by lowering to the normal temperature.

D.Refrigeration system

Control Mode	1. The control system automatically adjusts the operation of the refrigerator according to the test conditions, so that the equipment is in the best energy-saving condition. 2. The refrigeration capacity of the evaporator is switched by the solenoid valve driven by the control system. 3. Compressor return air cooling circuit.
Working Methods	The first-order compression is adopted for the 0 ~40℃ model. Binary cascade refrigeration is adopted at 40 ~70℃.
Refrigeration Compressor	The original imported French Taikang fully enclosed low noise rotor compressor.
Refrigerant	R404a/R23 (ozone depletion index is 0, R23 is used in cascade refrigeration system).
Condenser	Air-cooled: Finned tube heat exchanger. Water-cooled: shell-and-tube heat exchanger.
Evaporator	Finned tube heat exchanger (also used as dehumidifier).
Plate heat exchanger	Stainless steel brazed plate heat exchanger (cascade refrigeration system used).
Throttling Device	Expansion valve + capillary.