OK OK-STH-12.00010m² Walk-in Environmental Stress Screening Chamber (High-Temperature Burn-in & Temperature Cycling Chamber)

Overview

The OK OK-STH-12.00010m² Walk-in Environmental Stress Screening Chamber is an industrial-grade, large-volume thermal aging and reliability screening system engineered for continuous, load-bearing operation under controlled high-temperature and temperature-cycling conditions. Unlike precision environmental test chambers optimized for humidity control and fine-grained thermal ramping, this chamber is purpose-built for burn-in testing—applying sustained thermal stress to electronic assemblies, power modules, automotive ECUs, photovoltaic inverters, and battery management systems while under full electrical load. Its operational principle relies on forced-convection air circulation combined with high-capacity resistive heating and staged refrigeration to achieve stable, repeatable thermal profiles across its 12 m³ internal volume. Designed for 7×24-hour unattended operation in production-line or QA lab environments, it supports accelerated life testing per industry-standard reliability protocols including JEDEC JESD22-A108 (Temperature Cycling), JESD22-A104 (Highly Accelerated Temperature/Humidity Stress Test), and MIL-STD-810G Method 502.5 (Low Temperature) and Method 501.6 (High Temperature).

Key Features

• Robust structural design using fire-rated polyurethane-insulated color-coated steel panels (≥B1 flame retardancy rating), with reinforced floor loading capacity up to 1,200 kg/m² to accommodate multi-tier heavy-duty test racks.
• Modular HVAC system featuring high-static-pressure centrifugal fans, top-down supply air ducts, and dual-side return air paths—engineered to maintain ≤±3°C temperature uniformity throughout the working volume at steady state.
• Dual-mode thermal control architecture: high-power nickel-chromium electric heaters (up to 90 kW total) for rapid heating; semi-hermetic or scroll compressors with R404A/R507 refrigerant circuits for low-temperature hold and cycling capability down to −70°C.
• Integrated power distribution subsystem comprising a dedicated 380V AC main cabinet with configurable output circuits (up to 64 independently switched and monitored channels), each supporting real-time voltage/current/power logging via RS485 Modbus RTU interface.
• Industrial PLC-based control system with 10.1-inch HMI touchscreen, preloaded with standardized burn-in programs (constant-temperature soak, linear ramp, step-cycle), event-triggered alarms, and hardware-enforced safety interlocks—including overtemperature cutoff, smoke detection relay outputs, emergency egress door release, and exhaust fan fail-safe activation.

Sample Compatibility & Compliance

The chamber accommodates heterogeneous sample configurations—including rack-mounted servers, stacked PCB assemblies, EV battery packs, and outdoor telecom enclosures—via adjustable stainless-steel test racks with integrated cable management trays and grounded AC outlets (IEC 60320 C13/C19). All internal electrical components comply with IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emission) standards. Structural and thermal performance aligns with ISO 16750-4 (road vehicles—electrical loads), IPC-9701A (performance requirements for printed board assemblies), and UL 61010-1 (safety requirements for electrical equipment for measurement, control, and laboratory use). Optional audit-ready data logging meets GLP/GMP traceability requirements per FDA 21 CFR Part 11 when paired with OK’s optional validation package (IQ/OQ/PQ documentation, calibration certificates, and electronic signature support).

Software & Data Management

The embedded controller supports local program editing, runtime parameter adjustment, and alarm history review without external PC dependency. For enterprise integration, OK’s optional OK-EMS (Environmental Monitoring Suite) software provides remote monitoring via Ethernet/Wi-Fi, centralized fleet management, automated report generation (PDF/CSV), and secure cloud backup. All thermal and electrical parameters—including chamber setpoint, actual temperature, heater status, compressor stage, individual channel current, and cumulative energy consumption—are timestamped and stored with ≥30-day local retention. Data export conforms to ASTM E2911-13 (standard guide for data exchange in environmental testing) and supports third-party MES/SCADA ingestion via OPC UA or MQTT protocols.

Applications

This chamber serves as a core reliability assurance tool across multiple high-reliability sectors: consumer electronics (smartphone SoCs, fast chargers, wireless earbuds); telecommunications (5G baseband units, optical transceivers, edge computing nodes); automotive electronics (ADAS domain controllers, infotainment head units, OBCs); renewable energy systems (grid-tied inverters, BESS racks, solar charge controllers); and semiconductor packaging (LED arrays, SiC power modules, MEMS sensors). It enables early-life failure detection during the infant mortality phase of the bathtub curve, reducing field returns and improving MTBF metrics prior to final shipment.

FAQ

What is the difference between a walk-in aging chamber and a standard environmental test chamber?
A walk-in aging chamber prioritizes thermal stability, electrical load capacity, and long-duration operational robustness over high-precision humidity control or rapid transient response—making it ideal for burn-in rather than climatic simulation.
Can this chamber perform temperature cycling tests?
Yes—it supports programmable two-point cycling (e.g., −40°C ↔ +85°C) with user-defined dwell times, ramp rates, and cycle counts, compliant with JEDEC JESD22-A108.
Is the power distribution system customizable?
Yes—output channel count, voltage/frequency specifications (AC 110/220/380V, DC 12/24/48V), current rating (up to 32A per circuit), and monitoring granularity (per-channel kWh, THD, PF) are configurable at order entry.
Does the chamber include validation documentation?
Factory-installed IQ/OQ documentation is available as an option; PQ execution requires site-specific sensor mapping and load profiling conducted by certified OK Field Engineers.
What maintenance intervals are recommended?
Compressor oil analysis every 2,000 operating hours; filter replacement every 6 months; annual calibration of all PT100 sensors and power metering modules against NIST-traceable references.