OK Walk-in Reliability Environmental Test Chamber OK-STH-12.11m²

Overview

The OK Walk-in Reliability Environmental Test Chamber OK-STH-12.11m² is an engineered large-volume thermal stress testing platform designed for long-duration reliability validation under extreme temperature conditions. Unlike standard benchtop chambers, this walk-in system enables full human access for in-situ instrumentation setup, real-time sample monitoring, and operational intervention—functioning as a fully integrated environmental laboratory rather than a passive enclosure. Its core measurement principle is based on forced-air convection with multi-zone air distribution, coupled with cascade refrigeration (for sub-zero configurations) and precision PID-controlled electric heating. It is explicitly intended for compliance-driven reliability qualification per internationally recognized standards including IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), ISO 16750-4 (road vehicles), and GJB 150.1A–150.5A (military equipment). The chamber supports continuous 7×24 operation at defined temperature extremes, enabling extended dwell tests, step-stress profiles, and programmable thermal cycling protocols essential for accelerated life testing (ALT) and failure mode analysis.

Key Features

• Spacious internal volume (3.0 m × 2.0 m × 2.0 m) accommodating full-size industrial assemblies, automotive ECUs, telecom base station modules, or multi-unit production batches
• Selectably configurable temperature range from −70°C to +85°C (five standard variants), with cascade dual-refrigerant systems for stable sub-zero performance
• High-reliability air circulation architecture featuring centrifugal blowers, directional ductwork, and perforated ceiling plenums to maintain ≤±3°C uniformity across the working zone—even at −70°C
• Real-time operational loading support: integrated power feedthroughs (up to 3×32 A, 400 VAC), multiple shielded cable ports (Φ50–Φ100 mm), and double-glazed observation windows with anti-frost heaters
• Robust control system with 10.4″ color touchscreen HMI, onboard data logging (1 Hz resolution), and RS485/Modbus TCP interface for SCADA integration
• Structural design compliant with ISO 13374-2 (condition monitoring) and aligned with GLP/GMP facility layout requirements for audit-ready test environments

Sample Compatibility & Compliance

This chamber accommodates physically diverse test specimens—including enclosures up to 1.8 m tall, rack-mounted electronics, battery packs, and optoelectronic subsystems—without compromising thermal stability. All configurations meet electromagnetic compatibility (EMC) Class B emission limits per CISPR 32 and are constructed with non-outgassing insulation materials suitable for cleanroom-adjacent deployment. For regulatory traceability, the system supports optional calibration certificate documentation per ISO/IEC 17025-accredited providers, and its controller firmware includes audit trail functionality compatible with FDA 21 CFR Part 11 requirements when paired with validated software extensions. Thermal profiles adhere strictly to the ramp-and-soak timing tolerances specified in IEC 60068-1 and MIL-STD-810H Method 502.7.

Software & Data Management

The embedded OK-EnviroControl software provides intuitive profile programming (up to 99 segments, 999 cycles), real-time graphing of chamber and user-defined sensor inputs (via optional analog/digital I/O expansion), and automated report generation in PDF/CSV formats. Raw time-series data is stored locally on industrial-grade SSD storage (retention ≥18 months at 1 Hz sampling) and can be exported via USB or network share. Optional cloud synchronization enables remote monitoring and alarm notification via email/SMS. For enterprise integration, OPC UA server support allows bidirectional communication with MES/LIMS platforms, ensuring full alignment with digital quality management systems operating under ISO 9001:2015 and AS9100D frameworks.

Applications

• Automotive electronics qualification per ISO 16750-4 (temperature cycling, cold soak, high-temperature endurance)
• Avionics component screening per DO-160G Section 4 (operational temperature limits and thermal shock)
• Battery module thermal runaway propagation studies under controlled ambient gradients
• Long-term aging tests of LED lighting arrays, power converters, and industrial PLCs
• Environmental stress screening (ESS) of PCBAs prior to burn-in or final shipment
• Validation of hermetic seal integrity in medical device housings using temperature-induced pressure differential methods

FAQ

What temperature uniformity is guaranteed at −70°C?
At the coldest setting (−70°C), the chamber maintains ≤±3°C spatial uniformity across the defined working volume, verified per IEC 60068-3-5 using 9-point sensor mapping.
Can the chamber operate continuously for 1,000+ hours without maintenance?
Yes—its industrial-grade compressors, redundant fan drives, and self-diagnostic control architecture are rated for unattended 7×24 operation over 10,000-hour MTBF intervals.
Is external power conditioning required for stable operation?
A dedicated 3-phase supply with voltage regulation (±5% tolerance) and harmonic filtering is recommended; OK provides detailed site preparation guidelines covering grounding, cooling water specs (if water-cooled condenser option selected), and UPS sizing.
How is calibration traceability ensured?
Each unit ships with a factory-as-built temperature mapping report. On-site IQ/OQ documentation packages—including sensor placement schematics, uncertainty budgets, and deviation handling procedures—are available upon request.
Does OK offer thermal load calculation services before delivery?
Yes—engineering consultation includes free thermal load modeling based on customer-submitted sample power dissipation, mass, surface emissivity, and internal airflow constraints.