OK Walk-in Environmental Test Chamber OK-STH-12.1m²

Overview

The OK Walk-in Environmental Test Chamber OK-STH-12.1m² is a large-volume, human-accessible climate simulation system engineered for precision environmental stress testing under controlled temperature and humidity conditions. Designed in accordance with international test standards—including IEC 60068-2-78 (damp heat, steady state), IEC 60068-2-30 (damp heat, cyclic), and GB/T 2423.3—this chamber enables rigorous evaluation of product reliability, material stability, and long-term performance under thermohygrometric stress. Its operational principle relies on integrated refrigeration, resistive heating, electrode-based humidification, and forced-air circulation to achieve dynamic control over both thermal and moisture parameters within a sealed, insulated workspace. Unlike benchtop or reach-in chambers, the walk-in configuration supports full-scale testing of automotive components, energy storage systems, avionics assemblies, and industrial equipment—enabling real-world thermal mass loading and operator access during test execution.

Key Features

• Structural integrity ensured by high-density polyurethane insulated panels (150 mm thickness, λ ≤ 0.022 W/m·K), minimizing thermal bridging and energy loss.
• Double-glazed, electrically heated observation window with anti-fog functionality and safety interlock mechanism.
• Multi-point temperature and humidity sensing using Class A platinum resistance thermometers (Pt100) and capacitive RH sensors calibrated traceably to NIST standards.
• Intelligent programmable controller with 10.4″ color touchscreen interface, supporting up to 999 segments, 99 cycles, and real-time data logging at user-defined intervals.
• Dual-stage refrigeration system with scroll compressors (Bitzer or Copeland optional), air-cooled condensers, and microchannel evaporators for stable low-temperature operation down to −70°C.
• Shallow-tank electrode humidification system with deionized water supply and automatic level monitoring; optional steam generator available for ultra-pure vapor generation.
• Comprehensive safety architecture including over-temperature cutoff, phase failure protection, water shortage alarm, motor overload detection, and door-open interlock.

Sample Compatibility & Compliance

The OK-STH-12.1m² accommodates large-format test articles—including electric vehicle battery modules (up to 2 m in length), aerospace structural panels, and complete electronic enclosures—with unrestricted internal access via a 1,200 mm wide personnel door. Its uniformity performance meets or exceeds IEC 60068-3-5 requirements: temperature deviation ≤ ±3°C and humidity deviation ≤ ±3% RH across the working volume under static load conditions (verified per ISO/IEC 17025-accredited calibration protocol). The chamber supports GLP-compliant operation through audit-trail-enabled controller firmware compliant with FDA 21 CFR Part 11 (electronic records and signatures), enabling secure user authentication, change logging, and report export with digital signature capability.

Software & Data Management

Embedded controller firmware provides native support for standard test profiles (e.g., MIL-STD-810H Method 507.6, JEDEC JESD22-A110), with optional PC-based software (OK-EnviroLink™) for remote monitoring, multi-chamber synchronization, and automated compliance reporting. All logged data—including time-stamped temperature, humidity, setpoint deviations, alarm events, and actuator status—is stored internally (≥30 days at 1-second resolution) and exportable in CSV or XML format. Data integrity is maintained via cyclic redundancy check (CRC) validation and write-protected archival storage. Optional Ethernet/IP or Modbus TCP integration enables seamless connectivity to enterprise MES or LIMS platforms.

Applications

• Automotive: Validation of ADAS sensors, battery thermal management systems, and infotainment ECUs under combined thermal-hygric cycling per ISO 16750-4.
• Electronics: Accelerated life testing of PCBAs, connectors, and conformal coatings per IPC-9701 and JEDEC J-STD-020.
• Aerospace: Environmental qualification of flight-critical avionics per DO-160G Section 4 (temperature) and Section 5 (humidity).
• Pharmaceuticals & Biotech: Stability testing of packaging materials and excipients per ICH Q1A(R2) guidelines.
• Academic Research: Controlled hygrothermal aging of polymer composites, concrete specimens, and smart textiles.
• Quality Assurance: Third-party certification testing aligned with CNAS, UL, TÜV, and SGS accreditation scopes.

FAQ

What is the maximum allowable thermal load inside the chamber during operation?
The chamber is rated for continuous operation with up to 5 kW of internal heat dissipation (e.g., powered devices under test), provided ventilation pathways remain unobstructed and ambient room temperature remains ≤25°C.
Can the chamber perform rapid temperature transitions while maintaining humidity control?
Yes—within defined operational boundaries. Humidity hold is suspended during active ramping below 10°C to prevent condensation; rehydration resumes upon stabilization at target temperature.
Is third-party calibration documentation included with delivery?
Each unit ships with a factory calibration certificate covering temperature and humidity sensors, traceable to national metrology institutes. Full ISO/IEC 17025 calibration reports are available as an optional service.
What maintenance intervals are recommended for optimal long-term performance?
Compressor oil and refrigerant analysis every 24 months; humidifier tank cleaning weekly; air filter replacement every 3 months; annual verification of sensor drift and control loop response.
Does the system support custom test sequence scripting beyond preset standards?
Yes—the controller supports user-defined logic blocks, conditional branching, and external trigger inputs (dry contact or 0–10 V), enabling complex multi-phase environmental profiles.