English Product Name
| Brand | OEM / Custom-Branded |
|---|---|
| Origin | Imported |
| Manufacturer Type | Authorized Distributor |
| Pricing | USD 3,000–4,200 (FOB) |
| Temperature Range | –70°C to +180°C (standard models) |
| Humidity Range | 20–98% RH |
| Temperature Uniformity | ±0.5°C (at 25°C, empty chamber) |
| Humidity Uniformity | ±2.5% RH (at 60°C/90% RH) |
| Ramp Rate | 1–3°C/min (average air temperature, unloaded) |
| Cooling Water Requirement | 10–28°C, 0.1–0.3 MPa |
| Compliance | GB/T 2423.1–2023, GB/T 2423.2–2023, IEC 60068-2-1, IEC 60068-2-2, GJB 1032A–2021, MIL-STD-2164A |
Overview
The Environmental Stress Screening Chamber is a precision-engineered temperature and humidity controlled test chamber designed for accelerated environmental stress screening (ESS), reliability validation, and long-term stability testing of electronic components, automotive modules, medical devices, and industrial materials. It operates on a balanced temperature and humidity control (BTHC) principle—employing proportional-integral-derivative (PID) algorithms to dynamically regulate SSR-driven heating elements and steam/humidification systems in real time, ensuring thermal and hygric equilibrium between energy input and chamber heat/moisture loss. This architecture enables stable, repeatable operation across wide climatic ranges without thermal overshoot or condensation-induced drift—critical for compliance with accelerated life testing protocols under ISO 16750, AEC-Q200, and JEDEC JESD22 standards.
Key Features
- Robust dual-system architecture: Independent refrigeration circuit (capillary tube-based, auto-load-adjusting) paired with electric resistance heating and ultrasonic/steam humidification—eliminating reliance on expansion valves for superior stability and reduced maintenance.
- Integrated multi-layer safety protection: Dry-run prevention for humidifiers; independent overtemperature cutoff (dual-stage); low-water-level interlock; compressor overload, overheat, and overcurrent monitoring; high-pressure refrigerant switch; molded-case circuit breaker; and residual-current device (RCD) for full electrical safety compliance.
- Ergonomic industrial design: Seamless arc-welded stainless steel interior; powder-coated cold-rolled steel exterior; flat, non-reactive door handle; and front-accessible service panels for filter replacement and sensor calibration.
- Intelligent controller interface: Touchscreen HMI with multilingual UI (English, German, Japanese), programmable step-and-ramp profiles, real-time data logging, and USB export capability—designed for intuitive operator training and minimal learning curve.
- Thermal performance optimization: Air circulation via backward-curved centrifugal blower with adjustable vane dampers ensures uniform airflow distribution (±0.5°C spatial deviation at reference points per IEC 60068-3-5).
Sample Compatibility & Compliance
The chamber accommodates test specimens up to 500 L internal volume (customizable to 1,000 L), supporting fixtures for PCB assemblies, battery packs, optical sensors, and sealed enclosures. All structural and operational parameters are validated under no-load conditions at ambient 25°C ±6°C per IEC 60068-3-6. The system meets mandatory requirements for environmental stress screening per GJB 1032A–2021 and MIL-STD-2164A, including thermal cycling, humidity dwell, and combined temperature-humidity soak profiles. Full traceability is supported through optional GLP/GMP-compliant audit trails—including user login logs, parameter change timestamps, and alarm event records—with optional 21 CFR Part 11 electronic signature readiness.
Software & Data Management
Standard firmware supports up to 99 programmable test cycles with 99 segments per cycle, each configurable for temperature setpoint, ramp rate, dwell time, and relative humidity target. Optional PC-based software (Windows/Linux compatible) enables remote monitoring via Ethernet or RS485, automated report generation (PDF/CSV), statistical process control (SPC) charting, and deviation alerting via email/SNMP trap. All logged data includes ISO 8601 timestamps, sensor ID metadata, and calibration certificate references—ensuring full alignment with ISO/IEC 17025 laboratory accreditation requirements.
Applications
- Accelerated aging of polymer encapsulants and conformal coatings under cyclic 40°C/93% RH conditions (per IPC-TM-650 2.6.25).
- Pre-conditioning of lithium-ion battery cells prior to safety testing (UN 38.3, IEC 62133).
- Environmental qualification of avionics hardware per RTCA DO-160 Section 4 (Temperature) and Section 5 (Humidity).
- Stability assessment of pharmaceutical packaging per USP <1151> and ICH Q1A(R2) guidelines.
- Failure mode analysis of solder joints via thermal shock profiling (–55°C ↔ +125°C, 10-min dwell).
FAQ
What is the difference between “air temperature ramp rate” and “product temperature ramp rate”?
Air temperature ramp rate reflects the average change in chamber air temperature—not specimen surface or core temperature. Actual product thermal response depends on mass, thermal conductivity, mounting method, and thermal inertia, and must be verified separately using embedded thermocouples.
Is cooling water connection mandatory for all operating conditions?
Yes—chamber models rated for ≤–40°C operation or continuous high-humidity (>85% RH) testing require chilled water supply (10–28°C, 0.1–0.3 MPa) to maintain condenser efficiency and prevent refrigerant high-pressure faults.
Can the chamber be calibrated to national metrology standards?
Yes—equipped with NIST-traceable PT100 sensors (Class A tolerance) and compatible with external calibration rigs per ISO/IEC 17025. Calibration certificates include as-found/as-left data, uncertainty budgets, and compliance statements.
Does the controller support recipe-based automation for production line integration?
Yes—the HMI supports CSV import/export of test profiles and offers Modbus TCP/RTU protocol support for PLC synchronization and MES-level data handshaking.
