OK Environmental Systems OK-STH-12m² Walk-in Temperature & Humidity Aging Chamber

Overview

The OK-STH-12m² Walk-in Temperature & Humidity Aging Chamber is an engineered environmental simulation system designed for long-duration thermal and hygrothermal stress testing of large-scale industrial components and assemblies. Based on the principles of forced-air convection, precision vapor compression refrigeration, and saturated steam humidification, this chamber delivers stable, reproducible, and traceable environmental profiles across a wide operational envelope. It conforms to the physical modeling requirements of accelerated aging protocols used in reliability engineering, particularly where volumetric test capacity exceeds the limitations of standard reach-in chambers. Its structural architecture supports continuous operation under cyclic and steady-state conditions per MIL-STD-810, IEC 60068-2, and GB/T 2423 series standards—making it suitable for qualification testing in aerospace, automotive electronics, energy storage systems, and medical device manufacturing.

Key Features

• Robust walk-in construction with 12 m² internal floor area (2000 × 3000 × 2000 mm usable volume), enabling simultaneous conditioning of multiple full-size assemblies such as EV battery packs, avionics racks, or HVAC modules.
• Dual-stage cascade refrigeration system utilizing Tecumseh hermetic compressors, ensuring reliable sub-zero performance down to −40 °C without oil migration or freeze-up risk.
• High-efficiency SUS304 stainless steel interior and 100 mm thick rigid polyurethane insulation (λ ≤ 0.022 W/m·K) minimize thermal bridging and support ±2 °C temperature uniformity per IEC 60068-3-5.
• YX-880 programmable controller with 10.1″ capacitive touchscreen interface, supporting up to 999 segments, 99 cycles, and real-time graphical trend display; optional Ethernet/IP and RS485 Modbus RTU for SCADA integration.
• Steam-based humidification system with deionized water feed and automatic drain flush cycle to prevent mineral buildup and ensure stable RH control between 20–98 %RH at ±3 %RH uniformity.
• Integrated safety architecture including over-temperature cut-off (mechanical backup), phase loss detection, refrigerant high-pressure switch, and GFCI-protected power distribution—fully compliant with IEC 61000-6-2 EMC and UL 61010-1 safety requirements.

Sample Compatibility & Compliance

The chamber accommodates heterogeneous sample configurations—including stacked pallets, rolling trolleys, and mounted instrumentation racks—via its reinforced floor loading capacity (≥800 kg/m²) and unobstructed 900 mm wide access door with tempered double-glazed viewing window. It meets regulatory and industry-specific validation requirements for environmental stress screening (ESS), HALT/HASS pre-screening, and shelf-life prediction studies. Certification documentation includes factory calibration reports traceable to NIM (National Institute of Metrology, China) and compliance declarations against GB 11158, GB/T 2423.1–2423.4, IEC 60068-2-1/-2/-3, GJB 150.3/150.4/150.9, and ISO 17025-aligned IQ/OQ protocols upon request. Optional audit-ready features include electronic signature support, 21 CFR Part 11-compliant user access logs, and automated calibration verification routines.

Software & Data Management

The embedded YX-880 controller provides native CSV export functionality for temperature/humidity/time-stamped datasets, compatible with third-party analysis tools including MATLAB, JMP, and Minitab. Optional OK-EnvLog software enables remote monitoring via secure HTTPS web interface, configurable email/SMS alerts for deviation events, and synchronized multi-chamber fleet management. All data files are stored with SHA-256 checksums and include metadata fields for operator ID, test plan revision, and sensor calibration expiry. Audit trails record every parameter change, manual override, and alarm condition with UTC timestamps—supporting GLP/GMP environments requiring full data integrity and ALCOA+ principles.

Applications

• Automotive: Validation of ADAS ECUs, infotainment systems, and powertrain controllers under combined thermal cycling and humidity soak per ISO 16750-4.
• Aerospace: Ground-based environmental qualification of satellite subsystems per ECSS-E-ST-10-03C and DO-160 Section 4/5.
• Energy Storage: Calendar and cycle life assessment of lithium-ion battery modules under elevated temperature/humidity exposure (e.g., 45 °C / 95 %RH for 1000 h).
• Medical Devices: Accelerated aging of Class II/III packaging per ASTM F1980 and ISO 11607-1, including peel strength and seal integrity correlation studies.
• Industrial Electronics: Burn-in testing of PLCs, HMIs, and motor drives per IPC-9701 reliability standards.

FAQ

What is the maximum allowable load weight inside the chamber?

The floor is rated for uniform static loading up to 800 kg/m²; point loads must not exceed 1,200 kg on any single 300 × 300 mm area.
Can the chamber be validated for IQ/OQ/PQ per GMP requirements?

Yes—OK Environmental Systems provides optional qualification packages aligned with Annex 15 and ISO 14644, including protocol development, execution support, and final report generation.
Is remote diagnostics supported?

Standard Ethernet connectivity enables firmware updates, parameter backups, and live controller diagnostics via OK’s proprietary maintenance portal.
What humidification method is used, and how is water quality managed?

Saturated steam generation from deionized water (≥1 MΩ·cm resistivity); integrated auto-flush cycle prevents scale accumulation and ensures long-term RH stability.
Are custom modifications available for non-standard temperature/humidity ranges or power supply configurations?

Yes—engineering team supports bespoke configurations including extended low-temperature options (−60 °C), high-humidity variants (up to 98 %RH at 85 °C), and 400 V / 50 Hz three-phase input variants.