OK LED-Specific Programmable Temperature and Humidity Chamber OK-TH-9
| Brand | OK Instruments |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | OK-TH-9 |
| Instrument Type | Benchtop |
| Cooling Method | Air-Cooled |
| Temperature Range | −50 °C to +150 °C |
| Humidity Range | 20–98 % RH |
| Temperature Uniformity | ≤ ±2 °C |
| Temperature Fluctuation | ±1 °C (high-temp), ±2 °C (low-temp) |
| Humidity Uniformity | ≤ ±3 % RH |
| Humidity Fluctuation | ±3 % RH |
| Heating Rate | 1.0–3.0 °C/min |
| Internal Chamber Dimensions (W×D×H) | 600 × 500 × 400 mm |
Overview
The OK LED-Specific Programmable Temperature and Humidity Chamber OK-TH-9 is an engineering-grade environmental test system purpose-built for reliability validation and accelerated stress testing of light-emitting diode (LED) devices and assemblies. It operates on the principle of controlled thermal and hygric conditioning—precisely regulating chamber air temperature and relative humidity in accordance with programmable profiles—to replicate real-world climatic exposures such as high-temperature storage, low-temperature startup, temperature cycling, and combined temperature-humidity stress. Unlike generic environmental chambers, the OK-TH-9 integrates design elements specifically aligned with LED testing requirements: corrosion-resistant stainless steel interior construction, multi-layer low-emissivity anti-frost observation windows, standardized electrical feedthroughs for in-situ photometric and electrical monitoring, and thermally robust chamber architecture capable of managing self-heating loads from powered LED modules during operation.
Key Features
- Stainless steel inner chamber (SUS304) with seamless welding and electropolished finish—resistant to oxidation, condensation residue, and halogen-induced corrosion common in LED packaging materials.
- Benchtop form factor with compact footprint (600 × 500 × 400 mm internal volume), optimized for laboratory integration and small-batch qualification testing.
- Air-cooled refrigeration system with independent humidity generation and recovery—enabling stable operation across the full range of −50 °C to +150 °C and 20–98 % RH (within operational constraints per IEC 60068-3-5).
- Programmable controller supporting up to 100-step sequences, including ramp-soak cycles, stepwise transitions, and infinite looping—fully compliant with test protocols defined in IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), and IEC 60068-2-30 (damp heat cyclic).
- Dual-port feedthrough configuration (standard Ø50 mm, optional customization) for simultaneous voltage/current measurement and fiber-optic photometric signal routing—facilitating real-time luminous flux, chromaticity, and forward voltage tracking during thermal stress.
- Comprehensive safety architecture: over-temperature cut-off, compressor overload protection, low-water-level alarm, phase failure detection, and earth leakage circuit interruption—all logged with timestamped event records.
Sample Compatibility & Compliance
The OK-TH-9 accommodates a broad spectrum of LED-based products, including discrete LED chips, SMD packages (e.g., 2835, 3030, 3535), COB modules, PCB-mounted lighting arrays, automotive headlamp assemblies, and Mini/Micro LED display panels. Its internal geometry supports vertical mounting fixtures and modular sample trays, while the anti-frost observation window permits visual inspection of lumen output stability and localized delamination or lens hazing under active bias. The chamber meets core compliance benchmarks for LED product certification, including AEC-Q102 (Automotive Grade LED Stress Testing), IEC 60598-1 (Luminaire Safety), and GB/T 2423.1–2423.4 (Chinese national equivalents of IEC 60068). It supports GLP-aligned test execution through configurable audit trails, user access levels, and calibration certificate traceability to NIM (National Institute of Metrology, China) standards.
Software & Data Management
The embedded controller features a 7-inch TFT-LCD touchscreen interface with intuitive drag-and-drop profile editing, real-time dual-axis graphing (temperature vs. time, humidity vs. time), and USB export of CSV-formatted test logs. Optional Ethernet connectivity enables remote supervision via Modbus TCP or HTTP API integration into centralized MES/QMS platforms. All data—including setpoints, actual chamber readings, alarm events, and runtime diagnostics—is stored with ISO/IEC 17025-compliant metadata (operator ID, calibration status, environmental ambient conditions). When paired with OK’s optional Data Logger Pro software, users can generate automated compliance reports aligned with FDA 21 CFR Part 11 requirements—including electronic signatures, change history, and audit trail export for regulatory submissions.
Applications
- High-temperature/humidity storage testing per IEC 60068-2-78 to assess silicone encapsulant degradation, phosphor thermal quenching, and interfacial delamination in white LEDs.
- Temperature cycling (−40 °C ↔ +85 °C, 1000 cycles) to quantify solder joint fatigue and coefficient-of-thermal-expansion (CTE) mismatch failure modes in multi-die COB arrays.
- Damp heat cyclic testing (85 °C / 85 % RH, 1000 h) for evaluating moisture ingress resistance in IP65-rated outdoor luminaires and automotive signal lamps.
- Low-temperature startup verification at −40 °C to validate driver IC functionality and phosphor response latency in cold-climate traffic signage.
- Accelerated lifetime evaluation of UV-A LED curing systems under elevated humidity to detect quartz sleeve clouding and optical transmission loss.
FAQ
Does the OK-TH-9 support real-time photometric monitoring during temperature-humidity stress?
Yes—standard feedthrough ports accommodate both power leads and fiber-optic cables, enabling concurrent measurement of luminous flux, CCT, and CRI using external spectroradiometers or integrating spheres.
Is the chamber suitable for testing LED modules with active thermal management (e.g., integrated heatsinks or fans)?
Yes—the air-cooled design includes auxiliary exhaust capacity and calibrated airflow distribution to accommodate convective heat dissipation from powered samples without compromising chamber uniformity.
Can test profiles be exported/imported between multiple OK-TH-9 units for cross-site reproducibility?
Yes—profile files (.prf) are ASCII-encoded and fully interoperable across all OK-TH series chambers; version-controlled libraries can be deployed via USB or network share.
What calibration documentation is provided with delivery?
Each unit ships with a factory calibration certificate (traceable to NIM) covering temperature (−50 °C to +150 °C) and humidity (20–98 % RH) at three points per range, plus uncertainty budgets per ISO/IEC 17025 Annex A.
Is custom modification available for specialized LED testing needs?
Yes—OK Instruments offers OEM engineering services including vacuum-compatible variants, multi-zone thermal mapping sensors, UV-stabilized viewing windows, and DC power feedthroughs with EMI filtering.
