Programmable Walk-in Constant Temperature and Humidity Chamber

1.1 Product Specification

(1) Product name: Programmable Walk-in Constant Temperature and Humidity Chamber

(2) Internal chamber size: 2200 × 1500 × 1200 mm (W × D × H)

(3) External dimensions: Subject to actual design

(4) Chamber volume: 3960 L

1.2 Applicable Standards

(1) GB/T 5170.5-2008

(2) GB/T 10586-2006

(3) GB/T 2423.1-2008 Test A

(4) GB/T 2423.2-2008 Test B

(5) GB/T 2423.3-2006 Test C

(6) GB/T 2423.4-2008, etc.

1.3 Hazardous Materials (Prohibited)

(1) Experiments or storage of flammable, explosive, or volatile substance samples are not permitted.

(2) Experiments or storage of corrosive substance samples are not permitted.

(3) Experiments or storage of biological samples are not permitted.

(4) Experiments or storage of samples with strong electromagnetic emission sources are not permitted.

(5) Experiments or storage of radioactive substance samples are not permitted.

(6) Experiments or storage of highly toxic substances are not permitted.

(7) Experiments or storage of samples that may generate highly toxic substances during testing or storage are not permitted.

1.4 Product Application

The high and low temperature humidity cycling test chamber is mainly used to evaluate material performance under various environmental conditions, including heat resistance, cold resistance, dryness resistance, and humidity resistance.

It is suitable for quality testing of products in industries such as:Electronics、Electrical appliances、Telecommunications、Instruments、Vehicles、Plastics、Metals、Food、Chemicals、Building materials、Medical products、Aerospace.

1.5 Control System

Control method: A balanced temperature and humidity control system (BTHC) is adopted. The sensing system transmits the actual data inside the test chamber to the controller, which regulates SSR through multi-stage intelligent output to balance the output power of the temperature and humidity system. This ensures full stability of temperature and humidity within the chamber. The system also features energy-saving functionality, minimizing power consumption to the greatest extent while ensuring long-term, accurate, and stable operation of the equipment.

1.6 Temperature and Humidity Performance

(1) Temperature range: Room temperature ~ 120°C

(2) Humidity range: 20% RH ~ 98% RH

(3) Temperature fluctuation: ±0.5°C，Humidity fluctuation: ±1–2% RH

(4) Temperature uniformity: ≤ ±2°C，Humidity uniformity: ±1–3% RH

(5) Heating rate: 1°C/min (average over entire process)

(6) Cooling rate: 1°C/min (average over entire process)

1.7 Power Supply

380 V

2. Product Features

(1) The product features an aesthetically pleasing appearance, reasonable structure, and precise craftsmanship, offering simple and convenient operation as well as stable and reliable performance.

(2) The controller adopts a color touch-screen controller with simple operation, easy learning, and stable and reliable performance. It fully displays system operating status, execution, and set program curves in both Chinese and English. It supports RS232 computer interface connection, enabling direct remote control of the instrument via computer.

(3) The refrigeration system adopts a Gulen compressor. All components are imported from Japan, France, the United States, and Italy. The refrigerant uses environmentally friendly refrigerants (R23A, R404A) from the United States.

(4) A test port with a diameter of 50 mm is reserved on the left side of the chamber.

(5) Equipped with a fully automatic, high-precision system circuit. Any component action is locked and processed by PLC control. The entire system adopts PID automatic calculation control, ensuring high accuracy and high stability across the full temperature range.

(6) A specially designed air circulation and sensing system is adopted. Air outlet and return air sensors are used for detection and control to ensure temperature uniformity inside the chamber and eliminate dead zones.

(7) Equipped with an enlarged observation window made of four layers of hollow tempered glass, providing a wider field of view.

(8) The instrument is equipped with a full-range protection system, including power overload protection, leakage protection, control circuit overload and short-circuit protection, compressor protection, grounding protection, over-temperature protection, and alarm sound prompt. In case of any abnormal condition, the fault point and cause are immediately displayed on the screen and the system shuts down automatically.

(9) The internal chamber material is made of SUS#304 mirror-finish stainless steel, and the outer shell is made of high-quality stainless steel plate.

3. Product Structure

3.1 Inner Material

Mirror stainless steel (SUS#304)

3.2 Outer Material

Brushed stainless steel

3.3 Frame Structure

High-strength C-shaped steel is used as the main frame, with a top static load-bearing capacity of up to 300 kg. A built-in concealed, fully enclosed surrounding frame structure is adopted, providing an aesthetically pleasing appearance while ensuring stability and reliability.

3.4 Test Port

One Φ50 mm test port on left side

3.5 Door

Double door with observation window、Built-in lighting、Anti-condensation heating system for frame/door

3.6 Electrical Cabinet Components

IO board、 machine tool transformer、 ballast, intermediate relay、 time relay、 solid-state relay、 AC contactor、 thermal relay、 fuses、 circuit breakers.

3.7 Insulation Material

Rigid polyurethane foam + fiberglass insulation

3.8 Heater System

(1) Nickel-chromium electric heating wire heater

(2) SSR non-contact pulse width control

(3) Heating power: 6 kW

3.9 Humidification System

(1) External detachable boiler humidification method

(2) Stainless steel armored heater

(3) Heater control method: non-contact, time-proportional pulse width modulation, SSR (solid-state relay)

(4) Water level control device, heater dry-burn protection device, sediment collection device, and liquid level observation window

(5) Humidifier power: 6 kW

3.10 Water System

(1) 50 L auxiliary water tank with high/low level indicator (detachable and washable)

(2) High-efficiency electromagnetic water pump (≥5000 h continuous operation)

(3) Dual high/low level electronic switches

(4) Protection: dry burn, over-temperature, low water level, water supply timeout