OK Walk-in Environmental Test Chamber OK-STH-8.88m²

Overview

The OK Walk-in Environmental Test Chamber OK-STH-8.88m² is a large-volume, human-accessible climatic simulation system engineered for full-scale environmental stress testing of complex, system-level products. Unlike benchtop or upright chambers, this walk-in chamber functions as a fully enclosed, structurally reinforced environmental room—designed to accommodate personnel entry for sample loading, sensor placement, real-time monitoring, and in-situ instrumentation during operation. It employs a dual-stage cascade refrigeration system (high-temperature and low-temperature compressors) combined with high-capacity electric heating elements and precision-controlled steam-based humidification (for wet-heat variants), enabling stable and repeatable execution of temperature cycling, steady-state thermal exposure, and humidity-interleaved profiles per IEC 60068-2-1, IEC 60068-2-2, IEC 60068-2-14, and ISO 16750-4 test standards.

Key Features

• Reinforced structural frame with modular polyurethane-insulated sandwich panels (steel or stainless steel cladding, ≥120 kg/m³ density PU core) ensuring thermal integrity and long-term dimensional stability.
• Large access door with double-glazed observation window, anti-frost electric heating, mechanical safety lock, and magnetic seal—rated for continuous operation across the full temperature range.
• Distributed air circulation architecture: multiple high-static-pressure centrifugal blowers and optimized ductwork ensure ≤±3°C temperature uniformity throughout the 8.88 m² internal volume (2000 × 2000 × 2000 mm working space).
• Programmable PLC-based controller with 10.4″ color touchscreen interface; supports up to 99 programmable cycles, 999 segments per cycle, and real-time curve editing—including ramp/soak/humidity hold modes.
• Integrated test port array (6 × Φ100 mm, configurable with silicone grommets) for power, signal, and data cable routing while maintaining chamber integrity.
• Multi-layer safety architecture: independent over-temperature cut-off, refrigerant high-pressure protection, door interlock, phase failure detection, and emergency stop circuit compliant with EN 61000-6-2 and EN 61000-6-4.

Sample Compatibility & Compliance

The OK-STH-8.88m² is validated for testing complete assemblies that cannot be disassembled or scaled down—such as passenger vehicles, EV battery energy storage systems (BESS), avionics racks, telecom base station cabinets, photovoltaic inverters, and industrial control panels. Its physical footprint and internal clearance support simultaneous evaluation of multi-unit batches under identical environmental conditions, enabling statistically robust reliability screening (e.g., HASS/HALT pre-screening per ISTA 3A and GE 44C-12). The chamber meets requirements for GLP-compliant validation protocols, including IQ/OQ documentation packages, traceable calibration certificates (NIST-traceable Pt100 sensors), and audit-ready event logging aligned with FDA 21 CFR Part 11 electronic record controls when paired with optional secure network modules.

Software & Data Management

Built-in controller firmware supports CSV export of time-stamped temperature, humidity, and alarm logs via USB or Ethernet. Optional OK-EnviroLink™ software enables remote supervision (via HTTPS), multi-chamber fleet monitoring, automated report generation (PDF/Excel), and integration with enterprise LIMS or MES platforms through Modbus TCP or OPC UA interfaces. All data records include operator ID, timestamp, setpoint deviation history, and hardware fault diagnostics—ensuring full traceability for ISO/IEC 17025 accredited laboratories and automotive OEM PPAP submissions.

Applications

• Automotive: Cold-start validation of ICE/EV powertrains, HVAC performance mapping, ADAS sensor drift assessment under thermal gradient, and battery thermal runaway propagation studies.
• Aerospace & Defense: Environmental qualification of UAV airframes, mission-critical avionics enclosures, and satellite payload thermal vacuum pre-screening (when coupled with optional vacuum interface).
• Energy Infrastructure: Cycle life validation of grid-scale BESS cabinets per UL 9540A, thermal management efficacy testing of liquid-cooled DC fast chargers, and inverter derating analysis at elevated ambient temperatures.
• Datacom & Industrial IoT: Thermal throttling characterization of edge computing nodes, airflow optimization of 19″ rack-mounted servers, and long-duration burn-in of industrial gateways under combined temperature-humidity stress.
• Materials & Component Screening: High-volume accelerated aging of polymer housings, conformal coating adhesion testing, and solder joint fatigue evaluation using extended dwell-and-ramp protocols.

FAQ

What is the maximum allowable internal heat load from DUTs?
Maximum sustained internal heat dissipation must be specified during ordering; standard configurations support up to 5 kW continuous load. Higher loads require customized refrigeration capacity and airflow recalibration.

Can the chamber be expanded or reconfigured post-installation?
Yes—the modular panel system allows field expansion in 1 m increments along any axis, provided structural anchoring and utility routing are reassessed by OK’s engineering team.

Is humidity control available on this model?
The OK-STH-8.88m² platform supports optional steam-generator-based humidification (range: 20–98% RH, ±3% RH accuracy) and dehumidification via subcooling, enabling full IEC 60068-2-30 damp heat cyclic testing.

What electrical supply is required?
Standard configuration requires 380 VAC ±10%, 3-phase, 50 Hz, with dedicated 125 A circuit breaker and proper grounding per IEC 60364-5-54. Voltage stabilization is recommended for sites with >±5% grid fluctuation.

Does OK provide installation and commissioning support?
All units ship with factory-assembled core modules; on-site assembly, leak testing, thermal mapping (per ASTM E744), and operational validation are performed by certified OK Field Engineers—including full IQ/OQ documentation handover.