OK-HAST Series High-Pressure Steam Aging Test Chamber
| Brand | OK Instruments |
|---|---|
| Origin | Imported |
| Manufacturer Type | Authorized Distributor |
| Temperature Range | RT to 132 °C |
| Humidity Range | 75–100 % RH |
| Pressure Range | 0.0–2.8 kg/cm² (gauge), max safety capacity 4.0 kg/cm² |
| Temperature Uniformity | ±1.5 °C |
| Temperature Control Accuracy | ±0.5 °C |
| Temperature Resolution | 0.1 °C |
| Heating/Pressurization Time (0 → 2.0 kg/cm²) | ~30 min |
| Inner Chamber Material | SUS304 stainless steel |
| Outer Casing Material | SECC steel with electrostatic powder coating |
| Chamber Models | OK-HAST-25 (Φ250×300 mm), OK-HAST-35 (Φ300×450 mm), OK-HAST-45 (Φ450×500 mm), OK-HAST-65 (Φ650×600 mm) |
Overview
The OK-HAST Series High-Pressure Steam Aging Test Chamber is an engineered environmental stress test system designed for accelerated reliability evaluation of polymeric materials—including thermoplastics, elastomers, and electrical insulating components—under controlled high-temperature, high-humidity, and elevated-pressure conditions. Operating on the principle of saturated steam aging under pressurized autoclave environments, it replicates decades of real-world thermal-hygric degradation in a fraction of time by accelerating moisture diffusion and hydrolytic reaction kinetics. Unlike conventional thermal ovens or humidity chambers, this system maintains precise equilibrium between temperature, relative humidity, and absolute pressure—enabling strict adherence to industry-standard accelerated stress testing protocols such as JESD22-A102 (HAST), JEDEC Standard No. 22-A110, and IEC 60068-2-66. Its design conforms to ASME BPVC Section VIII Div. 1 requirements for pressure vessel safety and integrates dual-redundant safety architecture for unattended operation in QA/QC laboratories and semiconductor packaging validation facilities.
Key Features
- Automated full-cycle operation—from pressurization, temperature ramping, dwell, depressurization, to cooling—with programmable sequence logic ensuring repeatability across batches.
- Dual independent over-temperature protection: primary PID-controlled heating cutoff and secondary mechanical thermostat with audible alarm and power interlock.
- PID-based digital temperature controller (LED display) with ±0.1 °C control error tolerance and 0.1 °C resolution; integrated with real-time pressure-temperature correlation mapping.
- Intelligent water level management: auto-refill function triggered by ultrasonic level sensing prevents test interruption and eliminates manual intervention during long-duration aging cycles.
- Interlocked door safety mechanism: chamber remains de-energized unless door is fully sealed; ABS-insulated door handle and one-piece silicone gasket ensure operator thermal protection and long-term sealing integrity.
- Steam quality optimization: automatic condensate purge cycle removes non-saturated vapor prior to test initiation, ensuring consistent dew point and eliminating dry-steam artifacts that compromise material response fidelity.
- Robust pressure containment: ASME-certified pressure vessel construction with calibrated safety relief valve set at 4.0 kg/cm² (gauge), exceeding maximum operational pressure by >40% for fail-safe margin.
Sample Compatibility & Compliance
The OK-HAST chamber accommodates non-volatile, non-flammable, and non-explosive solid specimens—including PCB assemblies, molded connectors, encapsulated IC packages, polymer films, and rubber seals—without risk of chemical decomposition or volatile emission under test conditions. It supports sample trays and fixtures compliant with IPC-TM-650 2.6.25 and MIL-STD-883 Method 1008. All models meet CE marking requirements for electromagnetic compatibility (EMC Directive 2014/30/EU) and low-voltage safety (LVD Directive 2014/35/EU). Pressure vessel certification documentation is provided per PED 2014/68/EU Annex I essential safety requirements. For regulated industries, audit-ready operation logs—including timestamped temperature/pressure profiles, door status, water level events, and fault codes—are retained locally for GLP/GMP traceability.
Software & Data Management
While the base configuration features embedded LED-based controllers, optional RS-485/Modbus RTU interface enables integration with LabVIEW, MATLAB, or enterprise MES platforms. Data logging supports CSV export of time-stamped T/P/RH values at user-defined intervals (1–60 s). The system records all critical events—including start/stop timestamps, safety interlock triggers, and calibration verification points—in non-volatile memory. Optional PC software provides real-time remote monitoring, multi-chamber synchronization, and automated report generation aligned with ISO/IEC 17025 clause 7.7 requirements for measurement uncertainty documentation.
Applications
- Accelerated moisture sensitivity level (MSL) qualification of surface-mount devices per JEDEC J-STD-020.
- Reliability screening of automotive wire harness insulation and under-hood polymer components per SAE J2294.
- Validation of medical device housing seal integrity under sterilization-relevant conditions (ISO 11134).
- Quality conformance testing of aerospace-grade adhesives and composite laminates per ASTM D5229/D5229M.
- Process development support for wafer-level packaging and fan-out wafer-level packaging (FOWLP) moisture barrier performance assessment.
FAQ
What standards does the OK-HAST chamber comply with for HAST testing?
It supports JESD22-A102 (unbiased HAST), JESD22-A110 (biased HAST), and IEC 60068-2-66, with configurable dwell times, temperature/pressure setpoints, and ramp profiles matching these specifications.
Is the chamber suitable for testing printed circuit board assemblies (PCBAs)?
Yes—its uniform temperature distribution (±1.5 °C) and steam purity control minimize localized condensation and thermal shock, making it appropriate for populated PCBAs per IPC-A-610 Class 3 requirements.
How is data integrity ensured during extended unattended operation?
All operational parameters are logged internally with battery-backed memory; event timestamps include microsecond resolution for root-cause analysis during failure investigations.
Can the system be integrated into a centralized laboratory automation network?
Yes—via optional Modbus RTU or Ethernet/IP communication modules, enabling SCADA-level supervision and alignment with FDA 21 CFR Part 11 electronic record requirements when paired with validated software.
What maintenance intervals are recommended for long-term accuracy?
Annual calibration of temperature and pressure transducers is advised using NIST-traceable references; gasket replacement every 24 months ensures optimal sealing performance under cyclic thermal-mechanical stress.
