High-Temperature and High-Humidity Environmental Test Chamber

Overview

The High-Temperature and High-Humidity Environmental Test Chamber is a precision-engineered climatic simulation system designed for accelerated environmental stress testing of industrial components and materials under controlled thermal and hygrothermal conditions. Based on the fundamental principles of thermodynamic equilibrium and psychrometric control, this chamber employs dual-stage refrigeration, PID-regulated heating, and saturated steam humidification to reproduce standardized temperature-humidity profiles across wide operational ranges. It supports full-cycle testing—including temperature ramping, dwell, and humidity soak—enabling evaluation of product reliability, material degradation, condensation resistance, and long-term stability in real-world service environments. The chamber complies with core international test standards including MIL-STD-810G Method 501.6 (High Temperature), Method 502.6 (Low Temperature), IEC 60068-2-1 (Cold), IEC 60068-2-2 (Dry Heat), IEC 60068-2-30 (Damp Heat, Cyclic), and GB/T 2423.1–2023 / GB/T 2423.2–2023 / GB/T 2423.3–2016 (China National Standards). Its robust architecture ensures stable operation over extended test durations, making it suitable for R&D validation, incoming QC, and pre-certification qualification in regulated industries.

Key Features

• Dual-stage hermetic refrigeration system using environmentally compliant refrigerants (R404A for high-stage, R23 for low-stage), enabling reliable operation down to –70°C with low acoustic emission (<65 dB(A))
• PID-controlled electric heating elements with redundant overtemperature protection (mechanical and electronic cutouts)
• Steam-based humidification system with deionized water reservoir and automatic drain function to prevent mineral buildup and ensure repeatable RH generation
• Touchscreen controller with intuitive GUI, real-time graphing, multi-segment programmability (up to 99 cycles, 999 steps), and data logging at user-defined intervals (min. 1 sec)
• Full SUS#304 stainless steel construction (interior and exterior panels, shelves, door liner) for corrosion resistance and cleanroom compatibility
• Integrated mechanical safety features: door interlock switch, overpressure relief valve, refrigerant leak detection, and emergency stop circuit per IEC 60204-1
• Modular design supporting customization of internal volume (80 L to 1000 L), optional humidity range extension (5–98% RH), and auxiliary ports (e.g., additional Ø50 mm or Ø100 mm feedthroughs)

Sample Compatibility & Compliance

This chamber accommodates a broad spectrum of physical specimens—from printed circuit boards and automotive ECUs to polymer housings, lithium-ion battery modules, and aerospace composite laminates—without compromising thermal or humidity uniformity. Internal dimensions are optimized to maintain ASTM E145 Class A uniformity criteria across all standard models. All configurations meet electromagnetic compatibility requirements per EN 61326-1 and safety standards per EN 61010-1. For regulated applications, the controller supports audit-trail-enabled operation (user login, parameter change history, test log export via USB), aligning with GLP and GMP documentation practices. Optional IQ/OQ documentation packages are available to support FDA 21 CFR Part 11 compliance during equipment qualification.

Software & Data Management

The embedded controller firmware includes native CSV export capability for time-stamped temperature and humidity readings, with timestamp resolution to 100 ms. Optional PC-based software (Windows 10/11 compatible) enables remote monitoring, real-time dashboard visualization, automated report generation (PDF/Excel), and integration with enterprise LIMS or MES platforms via Modbus TCP or Ethernet/IP protocols. All logged data are stored with immutable metadata (operator ID, test ID, start/stop timestamps, calibration status), satisfying traceability requirements for ISO/IEC 17025-accredited laboratories.

Applications

• Electronics: Thermal cycling fatigue assessment of solder joints, conformal coating integrity under damp heat, and moisture sensitivity level (MSL) screening per J-STD-020
• Automotive: Validation of infotainment systems, ADAS sensors, and powertrain control units per ISO 16750-4 (climatic loads)
• Aerospace: Environmental qualification of avionics enclosures and wiring harnesses per DO-160 Section 4 & 5
• Materials Science: Accelerated aging of elastomers, adhesives, and fiber-reinforced composites under combined thermal-hygric stress
• Pharmaceutical Packaging: Stability testing of blister packs and vial closures under ICH Q1A(R3) recommended conditions
• Quality Assurance: In-process verification of environmental resilience prior to final assembly or shipment

FAQ

What temperature and humidity ranges are standard, and can they be extended?
Standard models cover –70°C to +150°C and 20–98% RH. Extended humidity range (5–98% RH) and ultra-low temperature options (–80°C) are available as factory-configured options.
Is the chamber suitable for continuous unattended operation?
Yes—designed for 24/7 operation with dual independent temperature sensors, refrigerant pressure monitoring, and auto-recovery from brief power interruptions.
How is calibration maintained and verified?
The chamber includes built-in sensor self-diagnostics and supports external NIST-traceable probe calibration. Annual recalibration services and certificate issuance are offered through authorized service centers.
Can test profiles be exported and shared between chambers?
Yes—test programs are saved as encrypted .PRO files and can be transferred via USB drive or network upload; compatible across all OK-TH series controllers.
What electrical infrastructure is required for installation?
A dedicated 3-phase 5-wire supply (AC 380 V ±5%, 50 Hz ±0.5 Hz) with proper grounding and circuit protection (≥63 A breaker for 1000 L models) is mandatory. Voltage stabilization is recommended where grid fluctuation exceeds ±5%.