Walk-in Constant Temperature and Humidity Chamber

Product Name

Walk-in constant temperature and humidity chamber / constant temperature and humidity chamber / constant temperature and humidity room

Application

The walk-in constant temperature and humidity chamber is suitable for aerospace products, information and electronic instruments, materials, electrical and electronic products and various electronic components, to test their performance indicators under high/low temperature or damp heat environments.

Chamber Structure

• Room base: the room base is a grid frame welded from 8# channel steel, so that under level conditions it can bear the weight of the room body, personnel and specimens without unevenness or cracking of the room bottom; load capacity 200 kg per square meter;
• Room structure: the room body (shell) consists of six room panels and one double-leaf large door, size 1800×2000 mm; the inner side is high-quality stainless steel plate (to prevent rusting of the inner wall during long-term humidity operation), the outer side is high-quality color-coated steel plate (well-known domestic brand); the insulation medium is rigid polyurethane foam — light, impact-resistant and well-insulating; the large door is also made of color-coated steel plate, with inner/outer opening handles so that test personnel can freely open the door from inside the closed room.

Technical Parameters

• Temperature range: -60°C~150°C (variable temperature range: -60°C~80°C)
• Humidity range: 30~98%RH (variable humidity range: 45~98%RH)
• Fluctuation / uniformity: ±0.5°C / ±2°C
• Accuracy: temperature 0.1°C, humidity 1%RH; indication accuracy: temperature 0.1°C, humidity 1%RH

Control System

• Controller: imported programmable touch-screen LCD with Chinese menu-style display, microcomputer integrated controller.
• Display instrument: the temperature and humidity display controller uses a fully imported (Japan) large-screen display (5.7-inch LED); simple screen operation, easy program editing, no key input required, direct touch-screen options. Accuracy: 0.1°C (display range).
• Temperature sensor: PT100 platinum resistance temperature sensor.
• Control mode: balanced temperature and humidity control; all electrical components use (Schneider) series products.
• Temperature & humidity control: P·I·D + S·S·R system same-channel coordinated control.
• Auto-tuning: the chamber has an auto-tuning function that instantly corrects temperature and humidity change conditions, making control more precise and stable.
• Operating interface: the controller interface is selectable in Chinese or English; the real-time operation curve can be displayed on screen.
• Program capacity: 120 programs, each with 99 sections, each section loopable for 999 steps; the maximum time setting per section is 99 hours 59 minutes.
• Screen lock: after data and test conditions are entered, the controller has a screen lock function to prevent accidental shutdown caused by unintended touching.
• Communication interface: RS-232 or RS-485 communication interface, allowing program design on a PC, monitoring of the test process, and functions such as automatic start/stop and curve data printing.
• Screen saver: the controller has an automatic screen saver function to better protect the LCD during long-term operation (longer service life).
• Alarm function: warning signals are provided if errors occur during operation or setting.

Refrigeration System

• Compressor: fully imported semi-hermetic Copeland.
• Refrigeration mode: cascade refrigeration, R22 single-stage refrigeration.
• Condensing mode: air cooling.
• Refrigerant: R404A, R23 (imported environmentally friendly type).
• Leak test: all system piping undergoes air-pressurized 48-hour leak testing.
• Independent systems: heating and cooling systems are fully independent.
• Refrigerant copper tubes: internally spiral-grooved refrigerant copper tubes.
• Evaporator: fin-type evaporator.
• Imported components: filter drier, refrigerant flow sight glass, service valve, oil separator, solenoid valve and liquid receiver are all imported original parts.

Standards

GB 10592-89 Technical requirements for high and low temperature test chambers
GB 10586-89 Technical requirements for damp heat test chambers
GB 2423.1-2001 Test A: low temperature test methods
GB 2423.2-2001 Test B: high temperature test methods
GB 2423.3-93 Test Ca: constant damp heat test methods
GB 2423.4-93 Test Db