OK STAH-8m³ Walk-in Environmental Test Chamber (Temperature & Humidity Aging Chamber)

Overview

The OK STAH-8m³ Walk-in Environmental Test Chamber is an industrial-grade, large-volume climatic aging chamber engineered for long-duration temperature and humidity stress testing of electronic components, automotive modules, aerospace assemblies, polymer materials, and packaging systems. Designed according to the fundamental principles of convective heat transfer and psychrometric control, the chamber employs a dual-refrigeration cascade system with liquid nitrogen assist option (optional), high-efficiency steam-based humidification, and precision air distribution via adjustable laminar airflow ducts. Its 8 m³ internal volume (2000 × 2000 × 2000 mm) supports full-size prototypes, production batches, or multi-unit rack-mounted test configurations—enabling real-world environmental simulation under controlled, repeatable, and auditable conditions. The chamber operates across a wide thermal envelope (−50°C to +150°C) and hygrometric range (30–98% RH), making it suitable for accelerated aging per JEDEC JESD22-A108, IEC 60068-2-1/2/14/30, and MIL-STD-810H methods.

Key Features

• Robust structural design with double-wall insulated stainless steel interior and A3 steel exterior cabinet, finished with anti-corrosive electrostatic powder coating.
• High-stability temperature control system featuring RKC (Japan) PID + SSR digital microprocessor controller with ±0.1°C setpoint accuracy and real-time deviation compensation.
• Class A platinum resistance sensor (PT100 Ω) calibrated to ISO/IEC 17025-accredited traceability standards; mounted at multiple spatial locations for uniformity validation.
• Intuitive 7-inch TFT touch HMI interface supporting multi-language operation, programmable ramp-soak profiles, and on-screen trend visualization.
• Integrated RS-232/RS-485 communication port compliant with Modbus RTU protocol—enabling seamless integration with SCADA, MES, or LIMS platforms for automated data logging and remote supervision.
• Comprehensive safety architecture including over-temperature cutoff, refrigerant pressure monitoring, door interlock, humidity overflow protection, and audible/visual fault alerts.
• Energy-optimized heating/cooling system with variable-speed compressors and PID-regulated steam humidifier delivering ≤1°C/min cooling and ≤3°C/min heating rates under full-load conditions.

Sample Compatibility & Compliance

The OK STAH-8m³ accommodates heterogeneous sample loads—including PCB assemblies, lithium-ion battery packs, medical device enclosures, and composite panels—without compromising thermal/hygrometric uniformity. Internal airflow is validated per IEC 60068-3-5 to ensure ≤±2°C temperature deviation and ≤±1% RH variation across the working volume. All operational parameters comply with Chinese national standards GB/T 10586–2014 (damp heat), GB/T 10592–2018 (low/high temperature), and GB/T 2423 series (environmental testing procedures). While not pre-certified to UL or CE, the chamber’s electrical architecture adheres to IEC 61000-6-2/6-4 EMC requirements and can be configured with optional third-party certification support for FDA 21 CFR Part 11-compliant audit trails and GLP/GMP-aligned validation documentation (IQ/OQ/PQ protocols available upon request).

Software & Data Management

The embedded controller supports up to 100 programmable test sequences with 99 segments per profile, including rate-controlled ramps, dwell periods, and cyclic humidity modulation. Data is recorded at user-selectable intervals (1 s to 60 min) and stored internally for ≥30 days. Via the serial interface, users may export CSV-formatted logs—including timestamped temperature, humidity, alarm status, and system diagnostics—to external PCs using OK’s free WinTest software. This application enables graphical overlay analysis, statistical process control (SPC) charting, PDF report generation, and scheduled automatic backups. For regulated environments, optional firmware upgrade provides electronic signature capability, change history logging, and role-based access control aligned with 21 CFR Part 11 Annex 11 expectations.

Applications

• Accelerated life testing of automotive ECUs under combined thermal cycling and humidity soak per ISO 16750-4.
• Reliability screening of consumer electronics prior to field deployment (e.g., smartphones, wearables).
• Stability assessment of pharmaceutical primary packaging under ICH Q1A(R3) long-term and accelerated storage conditions.
• Material degradation studies on adhesives, sealants, and elastomers exposed to extreme dry/wet thermal gradients.
• Pre-compliance environmental stress screening for avionics hardware per DO-160 Section 4 and 5.
• Validation of HVAC component performance in simulated ambient extremes.

FAQ

What is the standard calibration interval for the PT100 sensors?
Factory calibration is performed before shipment; users are advised to verify sensor accuracy annually or after any major maintenance event using NIST-traceable reference sources.
Can the chamber operate continuously for 1,000+ hours without intervention?
Yes—the system is rated for unattended 24/7 operation with redundant safety monitoring; preventive maintenance (e.g., refrigerant oil check, filter replacement) is recommended every 1,500 operating hours.
Is remote monitoring supported via Ethernet or cloud platforms?
Standard configuration includes only RS-232/485; Ethernet connectivity and MQTT/OPC UA integration are available as factory-installed options.
Does the chamber meet IP rating requirements for dust or water ingress protection?
No—the unit is designed for indoor laboratory or cleanroom installation only; it carries no IP classification and must be operated in environments with ambient humidity ≤85% RH and temperature ≤28°C.
What documentation is provided for GxP validation?
A complete validation package—including FAT/SAT templates, IQ/OQ protocols, calibration certificates, and material compliance declarations—is supplied with each unit; PQ execution support is available through OK’s certified validation engineers.