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Walk In Environmental Test Chamber







Temperature range

-20/-40/-70~150℃ (optional)


Walk-in Climate Chamber is suitable for large part and machineries undergone low to high, high to low temperature changi


The walk in environmental test chamber and humidity testing machine consists of a control panel, an electrical panel, a moisturizing plate blower, a heater, a humidifier, a freezer, etc. It provides large spare parts for the temperature and humidity testing of large parts and semi-finished products, and is suitable for testing large or large quantities of products, such as computer terminals, auto parts, etc.
Test Standard(including but not limited to… ):
Compliance with ASTM G53-77 specifications GB, GJB, MIL, ASTM, CNS, IEC, JIS, AATCC, DIN, Fed Test, BS and SAE.
Walk In Canstant Temperature And Humidity Environmental Test Chamber is designed for testing the capability of heat-endurance, cold-endurance, dryness-endurance, and humidity-endurance, suitable for quality control of the industries of electron, electrical equipment, vehicle, metal, foodstuffs, chemistry, building materials, luggage, adhesion tape, printing, packaging, etc.


Model HD-E705
Inner dimension 4m³, 8m³, 10m³, 15m³, 20m³, 25m³, 30m³, 40m³ (sizes can be customized)
Temperature range  -20/-40/-70~150℃ (optional)
Sample limit This test equipment prohibits the test of flammable, explosive, and volatile substance samples; the test of storing corrosive substance samples, the test of storing organisms, the test and storage of storing strong electromagnetic emission source samples
Power supply & its conditions 3¢380VAC±10%, 50Hz Three-phase four-wire system N + protective grounding

Allowable voltage fluctuation range: 10%

Allowable frequency fluctuation range: (50±0.5) Hz

The grounding resistance of the protective earth wire is less than 4Ω

The user is required to configure an air or power switch with corresponding capacity for the equipment at the installation site, and this switch must independently control the use of the equipment

Functional requirements (Air) Indoor space cooling, heating, humidification, and dehumidification;

According to the temperature and humidity setting, the indoor space reaches the set temperature and humidity

Test environment conditions The ambient temperature is +25°C, relative humidity ≤85%, and the value measured under the condition that there is no sample in the test box.
Temperature & Humidity Range
Humidity range Humidity range: 20~98%HR
Control precision Temperature resolution: 0.01°C
Humidity resolution: 0.1%RH
Temperature deviation: ±1.5°C
Humidity deviation: ±2%RH
Temperature uniformity: ≤2°C
Humidity uniformity: ≤3%RH
Temperature fluctuation: ±0.5°C
Humidity fluctuation: ± 2%RH
Temperature rise and fall rate (no load) +25℃→+80℃≤35 min

+25℃→-40℃ ≤60 min

Note: The above performance indicators are the values measured under the condition that the ambient temperature is +25°C, the water temperature is 28°C, the relative humidity is ≤85%, and there is no sample.
Structure Combined assembly board, detachable structure, convenient for on-site installation.
Exterior materials Color steel plate φ=0.8mm
Interior materials Stainless steel plate SUS304φ=0.8mm
Library body thickness 100mm insulation material is rigid polyurethane foam
Floor load Reinforced bottom plate, can load 600kg/㎡ (evenly distributed load)
Material of the door Same as warehouse board
Thickness of the door 100mm insulation material is rigid polyurethane foam
Door Double door, effective headroom size W1500*H2200mm,
Door lock Japanese door lock, strong door hinge, with anti-deadlock device
Observation window Two observation windows: Two W300*H450mm conductive film explosion-proof and anti-fog tempered glass observation windows are set on the door,
Test hole 1 test hole, size: Φ100mm, position to be determined by the customer
Air conditioning channel Built-in air room, circulating air duct and stainless steel circulating fan, through the top back leaf window and diffuser, the wind blows out from the top evenly, and distributes the tempered temperature in the tempering room to the test space, so as to achieve the purpose of uniform temperature control
Control panel South Korea imported TEMI2700 LCD touch type programmable controller

Lighting switch, main power switch, RS-232 communication interface

Machinery room Refrigeration unit, exhaust fan, drainage device, water vapor outlet
Power distribution control cabinet Main power circuit breaker, controller, switchboard, cooling fan, over-temperature protector
Heating system Use scale heat dissipation heating tube P.I.D to control heating to achieve temperature balance
Cooling system Heat exchanger: water-cooled condenser
Mode of transport The machine room is transported as a whole, and the warehouse body is packaged and transported
Electrical Control System
Controller Imported controller to control temperature and humidity separately

South Korea SAMWON, color touch screen control TEMI2700

Screen display function Temperature and humidity setting (SV) actual (PV) value is directly displayed

Can display the execution program number, segment number, remaining time and cycle number, running time display

Program editing and graphic curve display

With a separate program editing screen, each page can enter 4 segments of temperature, humidity, and time

Fixed-point or program action status display

Language switch can switch Chinese/English

7.5 True color display screen

Program capacity and control function The amount of programs that can be used: 120 groups at most, 1 program can be combined from 1 to 100 stages
Usable memory capacity: 1200 SEGMENTS
Commands can be executed repeatedly: each command can be up to 999 times
The program slope setting can be set by the time axis
Each segment between programs can be set up to 99 hours and 99 minutes, and the minimum is one minute, which can be set for connection use
With editing, clearing, inserting and other functions
With 4 sets of time signal output control (can control the ON/OFF action of the test object)
With 9 groups of PID parameter settings
Jump and hold function during program execution
The screen can be adjusted for backlight, and the backlight time can be set
Screen display protection function can be set timed or manually closed
Program copy, COPY, connection function, edit experiment title and other program editing functions
PID automatic calculation and FUZZY control function
With power-off program memory, it will automatically start and continue to execute the program after power is restored
With scheduled start-up and shutdown function
With date and time adjustment function
Button and screen lock (LOCK) function
With standby view function
With network connection function
RS-232 Can be connected to the computer to display the curve and obtain data

Can be used as a monitoring and remote control system

Can do synchronous control of multiple machines

Communication interface Used to store test data and test curves, the standard storage capacity is 2G, which can be expanded to 4G
SD memory card Chinese/English interface, touch input
Setting method Program method / fixed value method
Operation mode The upper and lower limits of the maximum temperature range 5℃
Display resolution Temperature: 0.01℃; Humidity: 0.1%; Time: 1min;
Power-off memory function The power-off recovery mode can be set as: hot start/cold start/stop
Schedule boot function The power-on time can be set at will, and the machine will run automatically when the power is turned on
Temperature measuring body PT100 platinum resistance
Curve record function With battery-protected RAM, it can save the set value, sampling value and sampling time of the device; the maximum recording time is 60 days (when the sampling period is 1.5min)
Software use environment IBM PC compatible machine, CPU above PⅡ, memory above 128M, Simplified Chinese Windows2000 or Simplified Chinese WindowsXP operating system
Internet connection It can be connected to the Ethernet network through professional software, remote control and remote assistance can be done through the network, and test data can be collected through the network, and multiple machines can be controlled at the same time
Predetermined area Temperature: Adjust according to the temperature working range of the equipment (upper limit +5℃, lower limit -5℃)
Input Platinum resistance/DC 1~5V input
Ancillary function(standard configuration) Fault alarm and reason, processing prompt function

Power-off protection function

Upper and lower limit temperature protection function

Cooling System
Cooling method In order to ensure the cooling rate and minimum temperature requirements of the laboratory, this laboratory adopts a set of binary compound refrigeration system. The cascade system includes a high-temperature refrigeration cycle and a low-temperature refrigeration cycle. The heat exchange is realized by an evaporative condenser.
Refrigeration Compressors Imported low-temperature compressor
Condenser Water-cooled heat exchanger
Evaporator Finned tube heat exchanger
Evaporative condenser Stainless steel brazed plate heat exchanger
Throttling device Thermal expansion valve, capillary tube
Refrigerator control method The PLC (Programmable Logic Controller) of the control system automatically adjusts the operating conditions of the refrigerator according to the test conditions

Compressor return air cooling circuit

Energy pressure regulating valve

Refrigerant Using environmentally friendly refrigerant R404A+R23 with an ozone depletion index of 0
Refrigeration system characteristics The pipelines of the whole system are tested for leak detection by venting and pressurizing 22kg.
The heating and cooling systems are completely independent.
Equipped with the company’s professional technical characteristics, it can prevent the damage of the high-temperature and high-pressure airflow co-current cooling machine.
All operating procedures of the refrigeration system are completely controlled by the microcomputer controller.
There is a drip pan at the bottom of the compressor, which can collect the condensation water produced by frost.
The compressor has its own PTC temperature sensor, when the compressor is over-temperature, it can realize over-temperature protection.
The compressor has its own oil pressure protector to realize compressor oil pressure protection.
The high and low pressure protection device monitors the pressure of the refrigerant during the working process of the equipment. Once the pressure of the refrigerant is higher than the limit pressure of the system or lower than the minimum pressure set by the system, an alarm will be issued immediately and the power supply will be cut off until the fault is eliminated .
The refrigeration system all uses imported brand accessories, which are reliable in quality and ensure the stability of the system.
Humidification & Dehumidification System
Replenishment method Three-stage filter filtration, water pump lifts automatic water supply, circulating filtration and recovery
Humidification and dehumidification method Adopt external humidification method, special dehumidification compressor starts dehumidification, P.I.D controls the humidification amount to reach the required humidity
Safety Protection System
Cooling System Compressor overheating, overcurrent, overpressure protection, etc.
Test box Limit over temperature, fan, motor overheating relay
Humidification system Dry heating of humidification heat pipe, abnormal water supply, abnormal drainage, abnormal water shortage
Power supply Leakage protection, overload and short circuit protection





walk in environmental test chamber Features

1. The separation of humidifier circuit from electric circuit improves safety and protects the circuit against the leakage of water supply line.
2. Available in Chinese and English LCD touch screen, easy operation and program.
3. Able to display the relative date and information of the whole operating system in running mode, graphic display, precautions, maintenance and troubleshooting appear on the screen instantly.
4. The Sirocco fan motor provides greater cyclic airflow to avoid dead corner in the chamber so as to obtain an uniform distribution of temperature and humidity.
5. The system of heating up, heating down, dehumidifying, and humidifying can be operated independently so as to reduce the cost of testing, extend the operation life of the machine and decrease the failure rate.
6. Water supply adopts automatic watering system, circulating water supply together with water filter.
7. The system-wide multi-security protection and power-cut memory.
8. Freezer imported by the French original armored warrior compressor and use environmental-friendly refrigerant (R134a, R404a, R23).

Transformer Increase

DC voltage output to fit voltage of chamber usage

Control Panel

User Friendly Touch Screen Control (English Version)

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