OK-HQ Series Forced-Air Thermal Aging Test Chamber
| Brand | OK Instruments |
|---|---|
| Origin | Imported |
| Manufacturer Type | Authorized Distributor |
| Temperature Range | RT+10°C to 200°C / 300°C |
| Temperature Uniformity | ±2°C |
| Temperature Stability | ±0.5°C |
| Air Exchange Rate | 2–100 cycles/hour (measurable and adjustable at 80°C) |
| Air Exchange Timing | 1 min – 99 h programmable |
| Internal Chamber Volume Options | 100 L to 800 L |
| Power Consumption | 4.0–9.0 kW |
| Rotating Sample Tray Speed | 8–10 rpm |
| Compliance | ASTM D5423-09 (Type II), ASTM D5374-93(2005), UL 1581, IEC 60811, JIS K7212, GB/T 2951, VDE 0472 |
Overview
The OK-HQ Series Forced-Air Thermal Aging Test Chamber is an engineered environmental test system designed for accelerated thermal aging evaluation of polymeric, elastomeric, and insulating materials under controlled, ventilated high-temperature conditions. Based on the principle of forced convection with precisely regulated air exchange, it simulates long-term thermal degradation effects in accordance with standardized laboratory aging protocols. Unlike static ovens, this chamber maintains a continuous, quantifiable flow of fresh ambient air into the working chamber—enabling reproducible assessment of oxidative aging kinetics in wires, cables, rubber compounds, plastics, textiles, and coated substrates. Its architecture adheres to the structural and operational requirements of ASTM D5423-09 (Type II forced-ventilation laboratory oven) and supports compliance-critical testing for electrical insulation qualification per UL 1581, IEC 60811-501, and JIS K7212 (air exchange rate determination via power consumption method). The chamber operates across a wide temperature range (RT+10°C to 200°C or 300°C), with high-stability PID-controlled thermal regulation and validated uniformity (±2°C) and stability (±0.5°C) per IEC 60068-3-5.
Key Features
- High-precision air exchange control system: Adjustable from 2 to 100 air changes per hour (ACH), calibrated and verified per JIS K7212 using integrated digital watt-hour meter and timer—enabling traceable, standards-compliant air exchange rate calculation.
- Horizontal forced-air circulation architecture with dual-side airflow baffles and high-temp centrifugal blower ensures uniform thermal distribution and minimizes vertical/horizontal gradients within the working chamber.
- Stainless steel (SUS304) interior chamber with argon-arc welded seams and electropolished mirror finish; exterior A3 steel cabinet with durable powder-coated finish for corrosion resistance and cleanroom-compatible hygiene.
- Microprocessor-based LED controller with P.I.D. algorithm, 0.1°C setpoint and display resolution, and programmable timer (1–9999 minutes) for both aging duration and air exchange cycle timing.
- Rotating sample platform (Φ250–Φ700 mm, speed 8–10 rpm) enhances exposure uniformity for asymmetrical or vertically stacked specimens—critical for wire insulation and cable jacket testing.
- Multi-layer vacuum-insulated observation window with built-in halogen lighting enables real-time visual monitoring without thermal disturbance or condensation.
- Standard 50 mm diameter test port (left side) facilitates external sensor integration, power feedthrough, or data acquisition line routing under sealed operation.
- Comprehensive safety suite: Over-temperature cut-off, motor overheat protection, leakage current detection, short-circuit interrupters, and illuminated status indicators for all active safety functions.
Sample Compatibility & Compliance
The OK-HQ chamber accommodates a broad spectrum of physical sample forms—including insulated wires, extruded polymer strips, vulcanized rubber sheets, textile laminates, and molded plastic components—without requiring fixture modification. Its internal dimensions (100–800 L variants) support multi-tier rack configurations and rotating tray loading per ASTM D5374 Annex A. All models are factory-verified against key international standards: ASTM D5423-09 (Type II oven classification), UL 1581 Section 1060 (aging oven requirements), IEC 60811-501 (electrical insulating materials), JIS K7212 (air exchange measurement methodology), and GB/T 2951.12 (Chinese national standard for cable aging). Optional calibration documentation includes NIST-traceable temperature mapping reports and air exchange validation certificates compliant with GLP audit requirements.
Software & Data Management
While the base configuration features a stand-alone LED microcontroller, optional RS485/Modbus RTU interface enables integration with centralized lab management systems (LIMS) or SCADA platforms. Data logging of chamber temperature, elapsed time, and cumulative air exchange cycles is supported via external USB or Ethernet-enabled data loggers (sold separately). For regulated environments, optional 21 CFR Part 11-compliant software packages provide electronic signatures, audit trails, user access levels, and secure data export—fully aligned with FDA, ISO/IEC 17025, and GMP laboratory workflows.
Applications
- Accelerated aging of PVC, PE, XLPE, EPR, and silicone rubber insulation in wire and cable manufacturing QA/QC labs.
- Oxidative stability evaluation of automotive elastomers (hoses, gaskets) per SAE J2045 and ISO 188.
- Thermal endurance classification of insulating varnishes and encapsulants per IEC 60216.
- Pre-compliance screening for UL Recognition, VDE certification, and CE marking of electrical components.
- Material shelf-life modeling and Arrhenius-based lifetime extrapolation studies.
FAQ
What standards does the OK-HQ chamber meet for air exchange rate verification?
It complies with JIS K7212, which defines air exchange calculation via measured power consumption of the heating system under defined thermal load conditions—validated using the included digital watt-hour meter and precision timer.
Can the chamber operate continuously at 300°C with full air exchange capability?
Yes—the 300°C variant uses upgraded high-temp insulation, ceramic-fused heating elements, and a reinforced blower assembly rated for continuous duty at maximum temperature while maintaining specified air exchange accuracy.
Is the rotating tray removable for non-rotational testing?
Yes—the tray is tool-free detachable, allowing flat-rack or static specimen placement. The drive motor disengages automatically when the tray is removed.
Does the chamber support third-party calibration and IQ/OQ documentation?
Yes—factory calibration certificates (temperature uniformity, air exchange, controller accuracy) are provided. IQ/OQ protocols and on-site validation support are available upon request through authorized service partners.
What is the warranty coverage and service response time?
Standard warranty is 18 months parts-and-labor. Priority technical support and on-site service (within 5 business days) are available under extended service agreements covering preventive maintenance and metrological recalibration.
