OK-T-72 High Temperature Aging Test Chamber

Overview

The OK-T-72 High Temperature Aging Test Chamber is an engineered environmental test system designed for accelerated thermal aging evaluation of materials, components, and finished products under controlled elevated temperature conditions. It operates on the principle of forced-air convection heating, where heat is generated by high-efficiency nickel-chromium far-infrared heating elements mounted at the chamber base and uniformly distributed via a precision-balanced centrifugal blower assembly. The chamber’s thermal architecture supports stable, repeatable exposure across its operational range of RT + 10°C to 290°C — suitable for long-duration stress testing in quality assurance, reliability engineering, and R&D laboratories. Its mechanical and control design adheres to the structural and procedural requirements outlined in GB/T 2423.2—2008 (equivalent to IEC 60068-2-2:2007), ensuring compatibility with standardized high-temperature dry heat test protocols used globally in electronics, polymer, automotive, and electrical component validation.

Key Features

• Independent dual-heating circuit architecture enables precise thermal zoning and redundancy for uninterrupted operation during extended aging cycles.
• PID-based intelligent temperature controller with LED digital interface provides real-time monitoring, programmable timer (0–999 minutes), and auto-tuning capability for minimal overshoot and rapid stabilization.
• PT100 platinum resistance sensor ensures traceable, NIST-compatible temperature measurement with inherent linearity and long-term drift stability.
• Forced air circulation system delivers uniform thermal distribution (±1.5°C) throughout the 450 × 400 × 400 mm working volume, verified per ISO 17025-compliant calibration procedures.
• Robust mechanical construction: interior chamber lined with corrosion-resistant galvanized steel (optional SUS 304 stainless steel upgrade available); exterior housing fabricated from cold-rolled steel with electrostatic powder coating for durability and chemical resistance.
• Integrated safety subsystems include Class II leakage current protection, audible/visual overtemperature alarm, and hardware-independent thermal cut-off switch rated at 310°C — compliant with IEC 61000-6-2 EMC immunity and IEC 61000-6-4 emission standards.

Sample Compatibility & Compliance

The OK-T-72 accommodates non-volatile, non-flammable solid specimens up to 30 kg total load across three adjustable SUS 304 wire mesh shelves. It is explicitly unsuitable for testing volatile organic compounds, solvents, pressurized vessels, or samples emitting condensable vapors — consistent with IEC 60068-1 general requirements for environmental testing. All thermal performance specifications are validated under steady-state conditions per GB/T 2423.2 Annex A calibration methodology. The chamber meets fundamental design criteria for GLP-compliant laboratories when operated with documented SOPs, maintenance logs, and periodic verification using accredited reference thermometers. While not pre-certified for FDA 21 CFR Part 11, its controller supports manual audit trail generation through timestamped setpoint logs and alarm event records.

Software & Data Management

The OK-T-72 utilizes a microprocessor-based standalone controller without embedded network connectivity or proprietary software. Temperature setpoints, dwell times, and alarm thresholds are configured manually via membrane keypad input. All operational parameters — including actual chamber temperature, elapsed time, and fault codes — are continuously displayed on the front-panel LED screen. For integration into automated QA workflows, optional RS-485 Modbus RTU output (available upon request) enables connection to SCADA systems or LabVIEW-based data acquisition platforms. Raw thermal data must be manually recorded or captured via external dataloggers compliant with ISO/IEC 17025 Clause 7.7 on measurement traceability.

Applications

• Accelerated life testing of printed circuit boards (PCBs), conformal coatings, and encapsulated semiconductor packages per IPC-TM-650 2.6.25.
• Thermal stability assessment of elastomers, thermoplastics, and adhesives under ISO 188 and ASTM D573 protocols.
• Pre-conditioning of lithium-ion battery cells prior to cycling tests (in accordance with UN 38.3 Section 38.3.4.1).
• Validation of thermal endurance ratings for insulating materials used in motors, transformers, and industrial control panels (IEC 60216 series).
• Stress screening of passive electronic components (resistors, capacitors, connectors) per MIL-STD-883 Method 1007.

FAQ

What is the maximum continuous operating temperature of the OK-T-72?
The chamber is rated for continuous operation up to 290°C. Sustained use above 250°C requires periodic verification of heater insulation integrity and blower motor thermal limits.
Can the internal chamber material be upgraded to stainless steel?
Yes — SUS 304 stainless steel interior lining is available as a factory-configured option to enhance corrosion resistance for aggressive test environments.
Does the OK-T-72 support ramp-soak profiles?
No — it features only fixed-setpoint temperature control with timer-based dwell functionality. Multi-step thermal profiles require external programmable controllers.
Is calibration documentation provided with shipment?
A factory calibration certificate (traceable to national standards) is included, listing as-installed temperature uniformity and sensor accuracy at three points (low/mid/high range).
What maintenance intervals are recommended for optimal performance?
Blower filter cleaning every 100 operational hours; annual inspection of heating element terminals, PT100 connections, and safety cutoff switches per manufacturer’s maintenance schedule.