OKE High-Low Temperature Environmental Test Chamber

Overview

The OKE High-Low Temperature Environmental Test Chamber is an engineered thermal stress testing system designed for precise, repeatable simulation of extreme ambient temperature conditions in accordance with international environmental test standards. It operates on the principle of forced-air convection using a dual-stage refrigeration circuit combined with PID-controlled electric heating elements to achieve stable, uniform thermal environments across its working volume. The chamber supports static and dynamic temperature profiling—from –70 °C to +180 °C—with typical ramp rates of 3–5 °C/min (dependent on load and setpoint), enabling accelerated life testing, qualification validation, and reliability screening of electronic components, automotive modules, aerospace hardware, and industrial materials. Its structural integrity and thermal performance are validated against ISO 16750-4, IEC 60068-2-1 (Cold), IEC 60068-2-2 (Dry Heat), and MIL-STD-810G Method 502.6 and 501.6.

Key Features

• Monolithic stainless-steel inner chamber with seamless welded corners and electrostatically applied powder-coated outer casing for corrosion resistance and long-term dimensional stability
• Double-layer insulated observation window with embedded anti-fogging heater and Philips LED illumination for real-time visual monitoring under operational thermal extremes
• High-efficiency axial-flow circulation fan with vibration-dampened mounting and acoustic insulation enclosure—operating noise <62 dB(A) at 1 m
• Integrated anti-vibration base pad compliant with ISO 10816-1 for Class II machinery, minimizing transmission of mechanical resonance during extended thermal cycling
• Load power feedthrough capability (up to 30 A, 250 V AC) with internal terminal blocks, enabling powered-in-situ testing of active devices under thermal stress
• Comprehensive safety architecture including over-temperature cut-off, compressor high-pressure shutdown, phase failure protection, and door interlock circuitry

Sample Compatibility & Compliance

The chamber accommodates samples up to 500 mm × 500 mm × 500 mm (W×D×H) with standard internal dimensions; custom configurations available upon request. Internal airflow velocity is maintained between 1.5–2.5 m/s across the test zone to ensure ASTM E145-21 Class B uniformity (±2 °C at steady state). All units undergo factory calibration traceable to NIST-certified reference thermistors and are supplied with a Certificate of Conformance per ISO/IEC 17025 requirements. Regulatory alignment includes full documentation support for GLP/GMP audits, IEC 61000-4-20 immunity verification, and compliance-ready test reports compatible with FDA 21 CFR Part 11 electronic signature workflows.

Software & Data Management

The embedded controller features a 7-inch TFT-LCD HMI with multi-language interface (English, German, Japanese, Chinese) and onboard data logging at 1-second intervals. Optional PC-based software (OKE-ChamberLink™ v4.2) enables remote operation, real-time graphing, alarm event tagging, and automated report generation in PDF/CSV formats—including timestamped audit trails for all parameter changes and cycle completions. Data export conforms to IEEE 11073-10201 for interoperability with LIMS platforms and supports CSV import/export for integration into statistical process control (SPC) systems per ISO 9001:2015 Annex A.3.

Applications

• Qualification testing of PCB assemblies per IPC-9701A thermal cycling profiles
• Thermal shock evaluation of lithium-ion battery packs under UN 38.3 Section 38.3.4
• Material coefficient of thermal expansion (CTE) characterization via controlled ramp-hold-ramp sequences
• Pre-conditioning of optical sensors prior to photometric calibration per ISO 9022-3
• Stress screening of avionics enclosures per DO-160G Section 4 (Temperature Variation)
• Validation of packaging seal integrity under thermal gradient exposure per ASTM F1980

FAQ

Does this chamber support programmable temperature ramps and dwell cycles?
Yes—the controller supports up to 99 segments per profile, with individually adjustable ramp rates, soak durations, and loop counts.

Is third-party calibration certification included with shipment?
A factory calibration certificate is provided; optional UKAS-accredited calibration (ISO/IEC 17025) is available at additional cost.

Can the chamber be integrated into an existing MES or SCADA infrastructure?
Yes—RS-485 Modbus RTU and Ethernet TCP/IP interfaces are standard; OPC UA gateway support is available via firmware update.

What is the warranty coverage and service response time?
OKE provides 24-month parts-and-labor warranty; technical support is available globally with 4-hour remote diagnostics SLA and on-site service within 72 business hours in Tier-1 regions.

Are humidity control options available for this model?
This model is configured for dry-thermal operation only; combined temperature/humidity chambers (e.g., OKE-TH Series) are offered separately.