OK-HQ Series High-Temperature Air-Exchange Aging Test Chamber
| Brand | OK |
|---|---|
| Origin | Imported |
| Manufacturer Type | Authorized Distributor |
| Temperature Range | RT+10°C to 200°C / 300°C |
| Temperature Uniformity | ±2°C |
| Temperature Fluctuation | ±0.5°C |
| Air Exchange Rate | 2–100 cycles/h (measured at 80°C) |
| Air Exchange Timer | 1 min – 99 h adjustable |
| Power Rating | 4.0–9.0 kW (model-dependent) |
| Internal Dimensions (L×W×H, mm) | 450×450×500 to 800×1000×1000 |
| 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 High-Temperature Air-Exchange Aging Test Chamber is an engineered environmental test system designed for accelerated thermal aging of polymeric and elastomeric materials under controlled, continuously refreshed atmospheric conditions. It operates on the principle of forced convection with regulated air exchange—enabling precise simulation of long-term thermal degradation mechanisms in electrical insulation, wire & cable sheathing, rubber compounds, textiles, and plastic components. Unlike static oven environments, this chamber maintains a defined volumetric air exchange rate (AER), ensuring consistent oxygen replenishment and volatile byproduct removal during extended exposure. This capability is essential for evaluating oxidative aging kinetics per standardized protocols including ASTM D5423 (Type II forced-ventilation laboratory ovens) and JIS K7212 (air exchange rate determination via power consumption measurement). The chamber’s temperature stability (±0.5°C fluctuation) and uniformity (±2°C across workspace) are validated under steady-state operation from ambient +10°C up to 300°C, supporting both routine QC validation and R&D-grade material lifetime modeling.
Key Features
- Precision-engineered air exchange regulation system: digitally adjustable from 2 to 100 cycles per hour, calibrated per JIS K7212 using integrated digital watt-hour meter and timer
- Horizontal forced-air circulation architecture with dual-side airflow baffles and high-temperature-rated centrifugal blower, ensuring uniform thermal distribution throughout the working chamber
- SUS304 stainless steel interior chamber (mirror-finish or argon-welded construction) and A3 steel exterior with electrostatic powder coating for corrosion resistance and cleanroom-compatible surface integrity
- Microprocessor-based PID controller with LED display; temperature setting and indication resolution: 0.1°C; programmable timer range: 1–9999 minutes
- Integrated rotating sample platform (Φ250–Φ700 mm, 8–10 rpm, detachable) to promote uniform exposure of cylindrical or asymmetrical specimens
- Insulation using high-density ultra-fine glass fiber cotton (≥100 mm thickness) to minimize thermal leakage and improve energy efficiency
- Standard 50 mm diameter test port (left side) with silicone gasket seal for external sensor feedthrough or power supply routing
- Multi-layer vacuum-insulated observation window with built-in halogen illumination for real-time visual monitoring without thermal disturbance
- Comprehensive safety architecture: over-temperature cut-off, motor overheat protection, short-circuit/leakage current interruption, and fail-safe door interlock
Sample Compatibility & Compliance
The OK-HQ chamber accommodates a broad spectrum of non-volatile, thermally stable samples—including insulated wires, molded rubber gaskets, PVC/PET film rolls, textile laminates, and cross-linked polymer sheets—without risk of outgassing-induced contamination or condensation. Its design satisfies critical regulatory requirements for electrical safety testing: UL 1581 (wire and cable), IEC 60811 (polymeric insulations), VDE 0472 (German electrical standards), and GB/T 2951 (Chinese national standard for cable testing). All models are certified to ASTM D5423-09 Type II specifications for forced-ventilation ovens, requiring verified airflow velocity profiles, minimum air exchange rates, and thermal uniformity across the working volume. Optional GLP-compliant audit trails and 21 CFR Part 11–ready data logging modules are available upon request for GMP-regulated laboratories.
Software & Data Management
While the base configuration employs a standalone LED-PID controller, optional RS485/Modbus RTU interface enables integration with centralized lab management systems (LIMS) or SCADA platforms. The integrated digital watt-hour meter and timer support automated air exchange rate calculation per JIS K7212 methodology—eliminating manual power consumption recording. For traceable validation, users may export time-stamped temperature logs (CSV format) via USB or serial connection. Firmware supports user-defined alarm thresholds, multi-step ramp-soak profiles, and event-triggered data capture (e.g., at each air exchange cycle completion). All controllers retain calibration history and operational logs for internal quality audits aligned with ISO/IEC 17025 documentation requirements.
Applications
- Accelerated aging of automotive wiring harnesses under simulated under-hood thermal cycling
- Oxidative stability assessment of silicone rubber seals used in aerospace hydraulic systems
- Thermal endurance evaluation of flame-retardant PVC insulation per IEC 60811-502
- Comparative lifetime modeling of biodegradable polymers exposed to elevated ambient oxygen concentrations
- Pre-conditioning of electronic encapsulants prior to humidity freeze testing (JEDEC JESD22-A110)
- Validation of shelf-life claims for medical device polymer housings under ISO 11607 accelerated aging protocols
FAQ
What standards does the OK-HQ chamber comply with for air exchange rate verification?
It conforms to JIS K7212 for air exchange rate determination via power consumption measurement, and meets the airflow and thermal uniformity requirements of ASTM D5423-09 (Type II) and ASTM D5374-93(2005).
Can the chamber operate continuously at 300°C with full air exchange capability?
Yes—models rated for 300°C maximum temperature maintain specified air exchange performance (2–100 cycles/h) across the full operating range, validated per manufacturer thermal mapping reports.
Is the rotating sample platform compatible with weight-bearing specimens?
The turntable supports loads up to 15 kg (model-dependent); dynamic balance is factory-verified at 10 rpm to prevent vibration-induced thermal gradient distortion.
How is temperature uniformity verified during installation qualification (IQ)?
A 9-point sensor mapping protocol (per ASTM E2207) is recommended; OK provides a certified calibration certificate covering all thermocouple inputs and controller output channels.
Does the chamber support remote monitoring via Ethernet or Wi-Fi?
Ethernet connectivity is available as an optional upgrade with embedded web server functionality for real-time parameter viewing and alarm notification via SMTP/SNMP.
