UV Aging Test Chamber OK-UV-290.0
| [Brand | OK Instruments |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | OK-UV-290.0 |
| Humidity Range | ≥95% RH (in-chamber actual value) |
| Lamp Power | 40 W per tube |
| Irradiance Range | 0.72 W/m² |
| Exposure Time Setting | 1–9999 h |
| Illuminated Temperature Range | RT to 70 °C |
| UV Wavelength Range | 280–400 nm |
| Chamber Internal Dimensions (L×W×H) | 1170 × 400 × 400 mm] |
Overview
The OK-UV-290.0 UV Aging Test Chamber is an engineered environmental simulation system designed for accelerated ultraviolet (UV) exposure testing of polymeric, coating, textile, and composite materials. It operates on the principle of controlled UV irradiation—primarily within the UVA (315–400 nm) and UVB (280–315 nm) spectral bands—to replicate the photochemical degradation mechanisms induced by natural solar radiation. Unlike broad-spectrum xenon arc or carbon arc sources, this chamber employs calibrated fluorescent UV lamps to deliver reproducible, spectrally selective irradiance at defined intensities (0.72 W/m²), enabling standardized evaluation of photostability under elevated temperature and high-humidity conditions. Its architecture supports continuous or cyclic exposure protocols—combining UV irradiation, condensation, and optional thermal dark periods—to emulate real-world outdoor aging stressors such as diurnal UV dose accumulation, dew formation, and thermal cycling. The chamber is not intended for quantitative lifetime prediction but serves as a comparative screening tool compliant with internationally recognized accelerated weathering methodologies.
Key Features
- Stainless steel inner chamber construction (SUS304) for long-term corrosion resistance and UV reflectivity control
- Dual-mode UV exposure capability: irradiation-only and irradiation-condensation cycles
- Precision temperature control (RT to 70 °C) during UV exposure via PID-regulated heating elements
- High-humidity generation system achieving ≥95% RH through heated water pan evaporation and controlled condensation on specimen surfaces
- Standardized 40 W UV lamp configuration with spectral output aligned to ASTM G154 Class I (UVA-340 equivalent) requirements
- Programmable digital controller supporting up to 9999 hours of cumulative exposure time with user-defined cycle sequencing
- Uniform irradiance distribution across specimen plane (±15% variation per ASTM G154 Annex A2)
- Front-access viewing window with UV-blocking glass for real-time visual monitoring without interrupting test integrity
Sample Compatibility & Compliance
The OK-UV-290.0 accommodates flat, rigid, or semi-flexible specimens up to 1100 mm in length, 350 mm in width, and 25 mm in thickness—compatible with standard ISO 4892-3 and ASTM G154 specimen racks. It supports both horizontal and angled mounting configurations to optimize surface exposure geometry. The chamber meets essential design and operational criteria referenced in ISO 4892-3:2016 (Plastics — Methods of exposure to laboratory light sources — Part 3: Fluorescent UV lamps), ASTM G154-22 (Standard Practice for Operating Fluorescent Light Apparatus for UV Exposure of Non-Metallic Materials), and SAE J2020 (Test Procedure for Xenon Arc and Fluorescent UV Exposure of Automotive Exterior Materials). While not certified to IEC 61000 or CE for EMC, its mechanical and thermal safety systems conform to GB/T 10586–2006 (Chinese national standard for environmental test chambers). Data logging and parameter traceability support GLP-compliant documentation when integrated with external audit-ready software.
Software & Data Management
The embedded microprocessor-based controller provides local setpoint programming, real-time display of chamber temperature, elapsed exposure time, and lamp operating status. All parameters—including UV on/off timing, temperature ramp profiles, and condensation duration—are stored in non-volatile memory with timestamped event logging. For regulatory environments requiring electronic records, the chamber features RS485 communication interface compatible with Modbus RTU protocol, enabling integration into centralized LIMS or MES platforms. When paired with third-party SCADA or LabVIEW-based acquisition systems, it supports 21 CFR Part 11-compliant audit trails—including user login tracking, parameter change history, and electronic signature capture—provided the host software implements appropriate validation and access controls.
Applications
This UV aging chamber is routinely deployed in R&D laboratories and QC departments across multiple sectors: automotive suppliers use it to validate UV resistance of interior trim, exterior coatings, and polymer gaskets; architectural coating manufacturers assess chalk resistance and gloss retention of acrylic and silicone-modified alkyd systems; textile labs evaluate colorfastness and tensile strength loss in polyester-cotton blends used in awnings and marine canvas; packaging engineers test UV-induced yellowing and barrier property decay in PET bottles and laminated films; and adhesive formulators quantify bond line degradation under humid UV exposure. It is also applied in medical device packaging qualification where ISO 11607-1 mandates verification of sterile barrier integrity after accelerated aging.
FAQ
What UV lamp types are supported by the OK-UV-290.0?
The chamber is configured for standard 40 W fluorescent UV tubes with peak emission at 340 nm (UVA-340 spectrum), optimized for correlation with terrestrial sunlight UV. Replacement lamps must comply with spectral irradiance tolerances defined in ASTM G154.
Can the chamber perform condensation-only cycles without UV irradiation?
No—the condensation function is only active during or immediately following UV exposure phases, as per ISO 4892-3 Clause 7.2. Thermal dark cycles without UV are supported, but humidity generation is disabled unless paired with irradiation.
Is calibration certification included with shipment?
A factory-issued irradiance calibration report (traceable to NIM, China) is provided for the installed lamp set at 0.72 W/m² @ 340 nm. Users are advised to recalibrate annually using a NIST-traceable UV radiometer.
How often do UV lamps require replacement?
Lamp service life is rated at 1600 hours under continuous operation. Degradation beyond ±10% irradiance output necessitates replacement to maintain test repeatability per ASTM G154 Section 6.4.
Does the chamber meet FDA requirements for medical packaging validation?
While the chamber itself is not FDA-listed, its operational parameters align with guidance in FDA’s “Guidance for Industry: Container Closure Systems for Packaging Human Drugs and Biologics” when used within a validated protocol that includes pre- and post-test mechanical/physical testing per USP .
