Our constant temperature and humidity test chamber ensures optimal conditions for testing, allowing for greater precision and reliability. These innovative chambers are ideal for testing materials, electronics, and more, replicating various environmental conditions. Each feature is designed to facilitate accurate testing and improve data integrity, giving your testing process a significant edge.
It is used for reliability testing of various materials under constant and gradual, sudden, heat resistance, cold resistance, dryness resistance, moisture resistance and other temperature and humidity environment simulations. Through the constant temperature and humidity test chamber, the adaptability of the samples in high temperature and high humidity, low temperature and low humidity, high and low temperature cycling, and constant high and low temperature environments is tested to determine the quality of the samples.
It is applicable to quality inspection and new project research and development in various industries such as electronic appliances, notebook computers, plastic products, LED light sources, LED lighting fixtures, circuit boards (PCB), resistors and power supplies, semiconductor industry, optoelectronic communication, automotive parts, connectors, computer components, wires and cables, metal hardware, chemical coatings, plastic products, rubber raw materials, building materials, electroplating, circuit board chips, etc.
Main features:
- Elegant design: The arc-shaped design and surface spray plastic treatment offer a high-quality appearance. The flat handle without counterforce makes operation easy and ensures safety and reliability.
- Large observation window with wide vision and bright light: The three-layer vacuum-coated window and Philips energy-saving fluorescent lamps eliminate the need for a wiper to remove fog, maintaining a clear observation effect and allowing for continuous monitoring of the test samples.
- Separation of the humidification system pipeline and control circuit: The humidification system pipeline is separated from the power supply, controller, and circuit board, preventing water leakage from the pipeline from affecting the circuit and enhancing safety. 4. Advanced and reliable refrigeration and control system: Original imported fully enclosed compressors from Europe and America, imported environmentally friendly refrigerants, world-renowned brand refrigeration components, original imported LCD touch screen controller, friendly interface, easy to operate and learn.
Advantages of the control system:
1: Large screen realistic color display: TFT LCD (LED backlight) 7-inch TFT true color VGA (800x480)
The human-machine dialogue touch screen input system is easy to operate and learn, powerful in function, and allows users to view the set curves and monitor the process on the LCD screen.
3: PV Curve/Group Curve: Real-time display of temperature and humidity PV, SV curves, historical stored curves, group curves and their status.
Up to 120 programs and 1200 segments can be set. The loop times can reach up to 999 times, and the maximum setting time for each period is 99 hours and 59 minutes.
It provides a USB communication interface for backing up historical curves and data, which is convenient to use. It can also be optionally equipped with RS485 and RS232 communication interfaces, allowing for easy control and monitoring via a PC.
6: It has functions such as program correction, clearing, scheduling, startup, power failure protection, memory retention, and key lock.
7: Screen saver function. During program operation, operating conditions can be set, including the running time of each section (up to 530 hours and 59 minutes). Each section can have a standby switch set, with a maximum value of 999,999 hours.
8: It has multiple alarm functions. When a fault occurs, it can be eliminated by displaying the fault on the screen simultaneously.
9: Record error history and provide it for users to review. All screens are available in English and Chinese.
10: BMP File Representation: Historical curves downloaded via USB are in BMP image format files.
Box structure：
Overview: The test chamber adopts an integral structure form. The working chamber of the box is fabricated through an integral welding process and sealed with high-temperature and low-temperature resistant silicone rubber material. The company completes the assembly and delivers the entire unit.
The upper part of the box is the working chamber, which is equipped with a blower motor, a non-sparking centrifugal fan blade, a temperature-limiting sheathed heater, a mechanical refrigeration system and a corrosion-resistant refrigeration evaporator made of pure copper sheet, etc.
Inner liner material: SUS304 1.2mm
Shell material: Made of high-quality galvanized steel sheet, the surface is treated with pickling and phosphating before electrostatic spraying.
Insulation material: Polyurethane foam and superfine glass fiber (thickness 100mm) are adopted, which is environmentally friendly, safe, non-toxic and odorless.
Control panel: Located on one side of the cabinet door, it is ergonomically designed for quick and convenient operation.
Door design: It adopts a single door design with an inner and outer double-layer structure. Between the door and the box body, there are double-layer silicone rubber sealing strips, which are resistant to high and low temperatures, anti-aging, and have good sealing performance. To prevent condensation or frosting on the door frame and door edges during low-temperature tests, electric heating defrosting devices are installed on the door frame and door edges.
Reinforced structural components: To prevent deformation of the test chamber, 80# channel steel is specially used for reinforcement inside the chamber to avoid deformation of the chamber door due to its excessive weight, which could affect the sealing performance and other aspects.
Interlayer shelf: 2 standard pieces, each with a load-bearing capacity of ≥ 30KG.
Test holes: φ50mm, φ100mm. Holes will be made as per customer's requirements.
Observation window: The test room door is equipped with one visible glass window: 200×300mm (W*H) hollow resistive film heating anti-frost observation window.
Humidification system：
Humidification method: Stainless steel humidifier
Humidifier material: Stainless steel armored casing
Humidifier control method: Contactless periodic pulse width modulation, SSR (solid state relay)
Humidifier device: water level control device, heater anti-dry-burning device
Water tank capacity: 15L
Water replenishment methods: Manual water replenishment / Automatic water replenishment
Safety protection function：
Grounding protection: reliable grounding protection device
Leakage protection: leakage/circuit breaker protection
Short-circuit protection: Heater short-circuit protection
Blower overload: Blower motor overload protection
Over-temperature protection: Independent over-temperature alarm for the working chamber.
Refrigeration unit overpressure protection: Refrigeration unit overpressure protection
Overload protection for refrigeration units: Overload protection for refrigeration units
Power protection: Undervoltage, overvoltage and phase loss protection of power supply.
When choosing a constant temperature and humidity test chamber, it is necessary to comprehensively consider factors such as equipment performance, application requirements, and budget. The following are key points for selection:
- Temperature and humidity range and accuracy
Temperature range: Select based on test requirements (e.g., -40°C to 150°C) to ensure coverage of the extreme operating conditions of the product under test.
Humidity range: Commonly 30% to 98% RH. High-precision tests may require a narrower fluctuation range (e.g., ±1°C/±2% RH).
Accuracy requirements: Industrial grade (±1°C/±3% RH) or laboratory grade (±0.5°C/±2% RH). High-precision equipment is more expensive. - Volume and dimensions
Inner box volume: Select based on the size and quantity of samples (e.g., 50L for small components, 225L or more for complete machine testing).
Sample placement space: Ensure there is sufficient air circulation space around the samples (usually less than 1/3 of the inner box volume). - Control system and stability
Controller type:
PLC/touch screen: Powerful, supports program setting and data recording (suitable for complex tests).
Push-button: Simple operation, suitable for basic needs.
Stability: Check the temperature and humidity fluctuation (e.g., ±0.5°C/±2% RH) and uniformity (e.g., ±1°C/±3% RH). - Heating/cooling rate
Rate requirements: For rapid temperature change tests, pay attention to the heating and cooling speed (e.g., 1 to 2°C/min or higher).
Refrigeration system: The brand of the compressor (e.g., French Tecumseh, Japanese Panasonic) affects the cooling efficiency and lifespan. - Humidity control method
Humidification method: Steam humidification (common), electrode humidification or ultrasonic humidification. Note the maintenance cost.
Dehumidification method: Mechanical refrigeration dehumidification (conventional) or desiccant dehumidification (special requirements). - Materials and structure
Inner box material:
Stainless steel (SUS304): Corrosion-resistant, suitable for humid environments.
Galvanized steel plate: Low cost, but prone to rust (requires regular maintenance).
Insulation material: Polyurethane foam or rock wool, affecting energy consumption and temperature stability.
Sealing: The material of the door seal (e.g., silicone) affects the humidity retention ability. - Safety protection functions
Essential protection: Over-temperature, water shortage, overload, and compressor overheating protection.
Extended functions: Leakage protection, phase loss protection, remote alarm, etc. (more important in industrial scenarios). - Data recording and communication
Data recording: Supports USB/SD card export or printer connection (important for long-term testing).
Communication interface: RS-232/485, Ethernet or GPRS (select based on remote monitoring requirements).
