High-Temperature High-Humidity Pressure Cooker Tester (HAST Series)
| Brand | Other Brands |
|---|---|
| Origin | Imported |
| Manufacturer Type | Authorized Distributor |
| Temperature Range | 100–132 °C |
| Humidity Range | 75–100 %RH (Saturated Steam) |
| Pressure Range | 0–4 kg/cm² above atmospheric |
| Chamber Dimensions (D×H) | Φ25×40 cm (HAST-25) |
| Temperature Control Accuracy | ±0.1 °C (PID) |
| Safety Features | Dual Overheat Protection, Interlocked Door Switch, Automatic Pressure Relief Valve, ABS Thermal Shielding, Integrated Silicone Gasket, Auto-Water Replenishment, Saturated Steam Purge System |
Overview
The High-Temperature High-Humidity Pressure Cooker Tester (HAST Series) is an engineered environmental stress testing system designed to accelerate moisture ingress and thermal degradation in electronic components, printed circuit boards (PCBs), semiconductor packages, and hermetic seals under controlled saturated steam conditions. Operating on the principle of accelerated aging via elevated temperature, pressure, and 100 % relative humidity—conditions that replicate and intensify real-world failure mechanisms such as corrosion, intermetallic diffusion, and dielectric breakdown—the HAST tester complies with industry-standard test protocols including JEDEC JESD22-A110, JESD22-A108, and IEC 60068-2-66. Unlike conventional autoclave-based systems, this instrument integrates precision PID-controlled heating, real-time pressure–temperature correlation monitoring, and dynamic steam quality management to ensure thermodynamic consistency across test cycles. Its sealed chamber maintains a saturated vapor environment where water activity (aw) remains at unity—critical for evaluating time-dependent reliability metrics such as mean time to failure (MTTF) and activation energy (Ea) in accelerated life testing (ALT).
Key Features
- Automated test sequence execution—from chamber pressurization and temperature ramping to dwell and depressurization—with no manual intervention required post-initiation.
- Dual independent overheat protection circuitry: primary PID controller + secondary mechanical thermal cutoff, triggering audible alarm and immediate power disconnection upon exceeding setpoint tolerance.
- LED digital PID temperature controller with ±0.1 °C steady-state accuracy; integrated real-time display of chamber temperature and corresponding absolute pressure (kg/cm²).
- Delay-start digital timer activated only after target temperature is stabilized—eliminating premature timing errors caused by thermal lag.
- Integrated steam purge mechanism: continuous venting of non-saturated vapor during pressurization ensures >99.5 % steam quality (dryness fraction ≥0.95) per ASME PTC 19.10 standards.
- Auto-water replenishment system monitors internal water level via capacitive sensor and injects deionized water without interrupting test continuity or compromising chamber integrity.
- Interlocked door safety switch prevents operation unless door is fully closed and latched; ABS polymer thermal shield minimizes surface temperature (<45 °C) during active cycling.
- Pressure relief valve calibrated to open automatically at 4.0 ±0.1 kg/cm² above ambient—certified per ISO 4126-1 for overpressure protection.
- One-piece molded silicone door gasket ensures long-term sealing performance (>10,000 cycles) and maintains leak rate <1.0 × 10−6 mbar·L/s under full operating pressure.
Sample Compatibility & Compliance
The HAST Series accommodates a broad range of sample configurations—including bare dies, wafer-level packages, molded ICs, MEMS devices, and multi-layer PCB assemblies—within its cylindrical stainless-steel chambers. Internal dimensions (Φ25–50 cm × 40–70 cm H) support both single-unit qualification and batch-level screening. All models are constructed from AISI 316L stainless steel with electropolished interior surfaces to resist chloride-induced pitting and steam oxidation. The system meets mechanical and electrical safety requirements per IEC 61010-1 (Ed. 3.0) and carries CE marking for EMC and LVD compliance. For regulated environments, optional audit-trail-enabled firmware supports 21 CFR Part 11-compliant electronic records, including timestamped parameter logs, operator ID tagging, and immutable test history export (CSV/Excel).
Software & Data Management
Standard configuration includes embedded microcontroller-based firmware with local LED interface; optional PC-based control software (Windows 10/11 compatible) enables remote scheduling, multi-step profile programming (up to 99 segments), real-time graphing of T/P/RH trajectories, and automated report generation compliant with ISO/IEC 17025 documentation requirements. All data—including raw sensor outputs, alarm events, door status transitions, and water refill timestamps—are stored internally with battery-backed memory retention (>72 h power loss). Export formats include CSV, PDF (with digital signature), and XML for integration into LIMS or PLM platforms. Audit trail functionality records user actions, parameter changes, and system diagnostics with SHA-256 hashing for data integrity verification.
Applications
- Qualification testing of plastic-encapsulated microcircuits (PEMs) per MIL-STD-750 Method 1082.
- Reliability assessment of flip-chip and wafer-level CSPs under JEDEC JESD22-A110 (HAST-U)
- Moisture sensitivity level (MSL) requalification after floor-life exposure.
- Failure analysis root cause isolation for popcorning, wire bond lift-off, and mold compound delamination.
- Validation of conformal coating integrity and underfill adhesion in automotive electronics (AEC-Q200).
- Accelerated corrosion testing of solder joints and metallization layers per IPC-J-STD-002/003.
FAQ
What is the maximum allowable test duration per cycle?
Standard operation supports continuous runs up to 999 hours; extended-duration validation requires periodic verification of water reservoir volume and gasket compression set.
Does the system support vacuum-assisted de-gassing prior to pressurization?
No—this model operates exclusively in positive-pressure saturated steam mode; vacuum pre-treatment is not implemented per JEDEC HAST methodology.
Can third-party calibration certificates be issued traceable to NIST or UKAS?
Yes—calibration services are available with accredited certificates (ISO/IEC 17025) covering temperature, pressure, and humidity sensors using reference standards traceable to national metrology institutes.
Is deionized water mandatory for operation?
Yes—conductivity must remain below 1 µS/cm to prevent scaling, electrode fouling, and erroneous RH interpretation in saturated steam environments.
How is steam saturation verified during qualification?
Steam dryness fraction is validated using a calibrated throttling calorimeter per ASME PTC 19.10, with results documented in the Factory Acceptance Test (FAT) report provided with each unit.
