High-Temperature Ventilated Aging Chamber – OK-HQ Series

Overview

The OK-HQ Series High-Temperature Ventilated Aging Chamber is an engineered environmental test system designed for accelerated thermal aging of polymeric and insulating materials under controlled air exchange conditions. Based on the principle of forced convection with regulated ventilation, it replicates long-term thermal degradation effects observed in real-world service environments—particularly for electrical insulation, wire & cable sheathing, elastomers, textiles, and plastic components. Unlike standard ovens, this chamber integrates a precision air exchange control mechanism compliant with ASTM D5423-09 (Type II) and ASTM D5374-93 (2005), ensuring reproducible oxidative aging kinetics by maintaining defined oxygen replenishment rates during exposure. Its robust thermal architecture supports stable operation from ambient +10°C up to 300°C, enabling standardized evaluation of material property shifts—including tensile strength loss, elongation reduction, surface cracking, and discoloration—under accelerated yet metrologically traceable conditions.

Key Features

• Intelligent microprocessor-based PID controller with SSR output, supporting programmable temperature ramping, dwell, and multi-step profiles; integrated digital timer (1–9999 min) with auto-stop and alarm functions.
• Horizontal forced-air circulation system featuring high-temperature-rated low-noise centrifugal blower and symmetrical airflow baffles, achieving ≤±2°C temperature uniformity across the working chamber per IEC 60068-3-5.
• Adjustable air exchange mechanism with calibrated orifice plates and digital flow monitoring capability—enabling precise setting of 2–100 air changes per hour (ACH), critical for simulating ventilated indoor/outdoor aging scenarios.
• Double-wall construction with high-efficiency glass fiber insulation (≥100 mm thickness), minimizing thermal leakage and energy consumption while maintaining exterior surface temperature <45°C at 200°C internal setpoint.
• SUS304 stainless steel interior chamber (electropolished finish) and powder-coated A3 steel outer casing ensure corrosion resistance, cleanability, and long-term dimensional stability under repeated thermal cycling.
• Large tempered observation window with built-in LED lighting facilitates real-time visual inspection without interrupting test conditions; optional quartz glass available for UV-transmissive applications.
• Integrated turntable (Φ250–Φ700 mm, model-dependent) enables uniform rotational exposure of vertically mounted specimens—essential for evaluating anisotropic aging behavior in cables and flat laminates.
• Dedicated Φ50 mm test port on left wall allows external sensor feedthrough, power supply connection, or data acquisition line routing without compromising chamber integrity.

Sample Compatibility & Compliance

The OK-HQ chamber accommodates a broad range of specimen geometries—from bundled wires and molded rubber gaskets to fabric swatches and plastic injection-molded housings—within standardized working volumes (100 L to 800 L). It meets mandatory requirements for electrical safety material qualification per UL 1581 (Section 1060), IEC 60811-501, VDE 0470-1, and GB/T 2951.12. All models are factory-calibrated against NIST-traceable reference thermometers and undergo post-calibration verification per ISO/IEC 17025–compliant procedures. The system supports GLP-compliant operation when paired with audit-trail-enabled software (see Software & Data Management), and its thermal performance is validated per ASTM E742 for oven uniformity and stability assessment.

Software & Data Management

While the base configuration employs an LED-display PID controller, optional PC-based data logging software (OK-LogPro v3.2) provides real-time temperature/air exchange rate visualization, automated report generation (PDF/CSV), and 21 CFR Part 11–compliant user access control, electronic signatures, and audit trail retention. Raw data files include timestamped chamber temperature, setpoint deviation, fan status, door-open events, and cycle completion logs—exportable for third-party statistical analysis (e.g., Arrhenius modeling of degradation kinetics). Calibration records and maintenance logs can be archived within the same platform, supporting ISO 9001 and IATF 16949 quality system documentation.

Applications

• Accelerated aging of PVC, PE, XLPE, and TPE insulation compounds per IEEE 1202 and ICEA T-28-525.
• Evaluation of thermal oxidative stability in automotive under-hood plastics (e.g., PP, PA66-GF30) per SAE J2233.
• Pre-compliance screening of wire harnesses and connector housings for aerospace (SAE AS4373) and rail (EN 45545-2) applications.
• Quality assurance testing of textile flame-retardant coatings under DIN 4102-1 and NFPA 701 protocols.
• Material shelf-life prediction via Arrhenius extrapolation using multi-temperature aging datasets.

FAQ

What standards does this chamber specifically support for wire and cable testing?

It complies with ASTM D5423-09 (Type II forced-ventilation oven), UL 1581 Section 1060, IEC 60811-501, and GB/T 2951.12 for thermal aging of electric cable insulation and sheaths.

Can the air exchange rate be verified independently during operation?

Yes—the chamber includes calibrated orifice plates and supports optional hot-wire anemometer integration at the exhaust port for on-site ACH validation per ASTM D5374 Annex A1.

Is the turntable speed adjustable?

No—the turntable operates at fixed low RPM (≤6 rpm) to prevent mechanical stress on specimens; rotation is continuous and synchronized with temperature control logic.

Does the system support remote monitoring via Ethernet or RS485?

The standard controller lacks network connectivity, but the optional OK-LogPro interface module adds Modbus TCP and RS485 communication for SCADA integration.

What maintenance intervals are recommended for sustained accuracy?

We recommend quarterly verification of temperature uniformity and annual recalibration of the PID controller and internal PT100 sensors by an ISO/IEC 17025-accredited laboratory.