JianHu JH-Series UV Weathering Test Chamber
| Brand | JianHu |
|---|---|
| Origin | Shanghai, China |
| Model | JH-UV Aging Chamber |
| Humidity Range | ≥95% RH |
| UV Lamp Power | 40 W per lamp |
| Irradiance Range | 0.72 W/m² (at 340 nm) |
| Exposure Time | 1–9999 h (adjustable) |
| Operating Temperature Range (Illuminated) | Consult technical support |
Overview
The JianHu JH-Series UV Weathering Test Chamber is an engineered environmental simulation system designed for accelerated ultraviolet (UV) exposure testing of polymeric, coating, automotive, and packaging materials. It operates on the principle of controlled UV irradiation—primarily using UVA-340 fluorescent lamps—to replicate the most damaging portion of terrestrial solar UV spectrum (295–365 nm), while simultaneously regulating chamber temperature and relative humidity. Unlike xenon-arc or carbon-arc testers, this chamber prioritizes high-fidelity UVA spectral matching for polymer degradation studies, enabling reproducible photochemical aging mechanisms such as chain scission, oxidation, and chromophore bleaching. The system is intended for laboratory-based compliance testing and R&D validation—not field correlation—and is widely deployed in quality assurance workflows where rapid screening of formulation stability, pigment resistance, or surface durability is required under standardized UV stress conditions.
Key Features
- UVA-340 fluorescent lamp array delivering spectrally accurate irradiance centered at 340 nm, compliant with ASTM G154 Cycle 1 and ISO 4892-3 Type A specifications
- High-humidity capability (≥95% RH) maintained via integrated water reservoir and precision PID-controlled steam humidification system
- Digital programmable controller with real-time monitoring of irradiance, black panel temperature, and chamber humidity
- Interlocked safety door with automatic UV lamp cutoff and cooling fan activation upon opening
- Stainless steel 304 interior chamber with removable sample racks accommodating standard 75 × 150 mm test specimens (custom fixtures available)
- Compliant electrical architecture meeting IEC 61000-4 EMC requirements and UL 61010-1 safety standards
Sample Compatibility & Compliance
The JH-Series accommodates flat, rigid, or semi-flexible specimens up to 5 mm thickness—including paints, plastics, textiles, adhesives, and composite laminates. Specimen mounting follows ASTM D4329 and ISO 4892-3 guidelines for uniform irradiance distribution and thermal equilibrium. While not certified for full regulatory submission without third-party validation, the chamber supports internal QA protocols aligned with ISO 9001:2015, IATF 16949, and GLP-compliant documentation practices. Data traceability is enabled through optional RS-485/Modbus RTU output for integration into LIMS or MES platforms. Note: Final test method selection (e.g., ASTM D4329 vs. ISO 4892-3) must be defined prior to protocol execution, as lamp type, filter configuration, and cycle parameters are fixed per model variant.
Software & Data Management
The embedded controller provides local data logging at 1-minute intervals for irradiance (W/m²), black panel temperature (°C), and relative humidity (%RH). Export is supported via USB flash drive in CSV format for post-processing in Excel or MATLAB. Optional PC-based software (JianHu LabLink v2.1) adds automated report generation, multi-chamber synchronization, and audit trail functionality compliant with FDA 21 CFR Part 11 requirements—including electronic signatures, user access levels, and immutable event logs. All firmware updates are delivered via signed binary packages with SHA-256 checksum verification. Calibration certificates for irradiance sensors are issued annually by JianHu’s ISO/IEC 17025-accredited metrology lab (CNAS L8726).
Applications
- Automotive OEMs validating exterior trim, headlamp lenses, and dashboard polymers against SAE J2020 and GMW14124
- Coatings manufacturers assessing gloss retention and color shift per ASTM D2244 and ISO 11341
- Photovoltaic module encapsulant developers screening EVA yellowing kinetics under IEC 61215-2 MQT10
- Medical device packaging labs verifying Tyvek® barrier integrity after UV preconditioning per ISO 11607-1
- Academic research groups studying photo-oxidative degradation pathways in biodegradable PLA and PHA films
FAQ
What UV spectral range does the JH-Series replicate?
The standard configuration uses UVA-340 lamps, emitting primarily between 295–400 nm with peak intensity at 340 nm—matching the short-wave UV component most responsible for polymer degradation.
Is black panel temperature measurement included?
Yes. Each chamber is equipped with a calibrated black panel thermometer (BPT) per ASTM G151, mounted adjacent to the specimen plane for accurate surface temperature tracking.
Can the system operate without humidity control?
Yes. Humidity can be disabled via controller menu; however, simultaneous UV + high-RH cycling is required for many industry-standard test methods including ASTM D4329 Cycle 3.
What maintenance intervals are recommended?
Lamp replacement every 1,600 hours of operation; quartz sleeve cleaning every 200 hours; humidity reservoir descaling monthly; annual irradiance sensor calibration.
Does JianHu provide test method development support?
Yes. Application engineers offer protocol consultation—including lamp selection, cycle definition, and failure mode mapping—for ASTM, ISO, and proprietary customer methods.
