OKE Environmental Test Chamber – High-Low Temperature Cycling Chamber for Industrial Reliability Testing

Overview

The OKE Environmental Test Chamber is an engineered high-low temperature cycling system designed for rigorous reliability validation of electronic components, automotive modules, aerospace subsystems, and industrial materials under controlled thermal stress conditions. Based on forced-air convection with dual-stage refrigeration architecture and PID-controlled heating elements, the chamber delivers precise, stable, and reproducible temperature profiles across a standard operating range of –40 °C to +150 °C (optional extension to –70 °C or +180 °C available). Its thermodynamic design follows the principles of uniform air distribution, minimized thermal gradient (<±1.5 °C at working volume center per GB/T 5170.2), and rapid transition rates (typically 3–5 °C/min average ramp rate, depending on load and setpoint delta). The unit is not intended for sterilization or humidity control; it is strictly a dry-thermal environment simulator compliant with international environmental test standards for qualification and screening protocols.

Key Features

• Robust stainless-steel inner chamber with seamless welding and electrostatically applied anti-corrosive coating for long-term exposure stability
• Double-wall vacuum-insulated construction with high-density polyurethane foam (≥100 mm thickness) ensuring low thermal leakage and energy efficiency
• High-torque, low-noise centrifugal circulation fan (rated <62 dB[A] at 1 m) with adjustable airflow baffle system for uniform temperature distribution
• Integrated anti-vibration mounting platform with elastomeric isolation pads meeting ISO 10816-3 vibration severity Class A requirements
• Front-access observation window with tempered double-glazed borosilicate glass and built-in resistive defogging heater (operational up to 150 °C)
• Philips LED interior lighting (IP65 rated, 3000 K CCT) with external switch and independent power circuit for safe visual inspection during operation
• Load testing capability: Dual-terminal 250 VAC/16 A pass-through connectors (IEC 60309 compliant) enabling real-time powered-device evaluation under thermal stress
• Comprehensive safety architecture including over-temperature cut-off (mechanical backup thermostat), compressor high-pressure protection, phase failure detection, and door interlock circuit

Sample Compatibility & Compliance

The chamber accommodates standard test specimens up to 500 × 500 × 500 mm (W×D×H) internal volume (larger custom configurations available). It supports both static and dynamic thermal cycling per IEC 60068-2-14 and MIL-STD-810G Method 502.6. All units undergo factory calibration traceable to NIM (National Institute of Metrology, China) and are supplied with a Certificate of Conformance listing as-tested performance against GB/T 5170.2–1996 and ISO/IEC 17025–aligned procedures. Optional IQ/OQ documentation packages are available for GLP/GMP-regulated laboratories. The system meets electromagnetic compatibility (EMC) requirements per GB/T 18268.1–2010 (IEC 61326-1) and electrical safety per GB 4793.1–2007 (IEC 61010-1).

Software & Data Management

Equipped with a 7-inch capacitive touchscreen HMI running embedded Linux, the controller provides real-time monitoring of chamber temperature, setpoint deviation, cycle progress, and alarm history. Data logging is performed at user-selectable intervals (1 s to 60 min) and stored internally (≥100,000 data points) with USB export capability (CSV format). Optional Ethernet/Wi-Fi connectivity enables remote supervision via Modbus TCP or HTTP API. Audit trail functionality complies with FDA 21 CFR Part 11 requirements when paired with OKE’s validated LabLink™ software suite (version 3.2+), supporting electronic signatures, role-based access control, and change history tracking for critical parameters.

Applications

• Temperature screening of PCBAs and semiconductor packaging prior to burn-in
• Thermal shock pre-conditioning for automotive ECUs per ISO 16750-4
• Accelerated life testing of lithium-ion battery modules under extreme thermal boundaries
• Material coefficient-of-thermal-expansion (CTE) correlation studies using strain gauge arrays
• Qualification of avionics enclosures per DO-160 Section 4 (Temperature Variation)
• Environmental stress screening (ESS) per Telcordia GR-63-CORE for telecom hardware

FAQ

Does this chamber support humidity control?

No — this is a dry-thermal only test chamber. Humidity-capable variants (e.g., combined temperature/humidity chambers) are available under model series OKE-THC but require separate specification and calibration.

What is the standard calibration interval recommended?

Annual calibration is recommended per ISO/IEC 17025 guidelines. Factory calibration is performed pre-shipment; users must verify sensor drift using NIST-traceable reference thermometers before first use and after any major maintenance.

Can the chamber be integrated into a centralized test lab management system?

Yes — native Modbus RTU (RS-485) and optional Modbus TCP/Ethernet interfaces enable integration with LabVIEW, TestStand, or MES platforms. Full register mapping documentation is provided upon request.

Is third-party certification (e.g., TÜV, SGS) available for this model?

Yes — CE marking (per EMC and LVD directives) is standard. Additional certifications (UL, UKCA, KC) can be arranged with lead-time extension and associated assessment fees.