HESON HS-408A Large-Scale High-Low Temperature Environmental Test Chamber

Overview

The HESON HS-408A Large-Scale High-Low Temperature Environmental Test Chamber is an engineered environmental simulation system designed for rigorous reliability validation of industrial components and finished products under controlled thermal stress conditions. Based on the principle of forced-air convection with dual-stage refrigeration architecture, it delivers stable, repeatable, and traceable temperature profiles across a wide operational range—from −70°C to +150°C—enabling compliance testing per MIL-STD-810G, GJB 150A-2009 (specifically Methods 3 and 4 for low-temperature and high-temperature exposure), IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), and ISO 16750-4 (road vehicles). Its 408 L internal volume (600 × 800 × 850 mm) accommodates full-size automotive ECUs, aerospace subassemblies, battery modules, and large-format electronic enclosures, making it suitable for laboratory-based qualification, incoming inspection, and accelerated life testing in R&D and QA environments.

Key Features

• Two-stage cascade refrigeration system utilizing original Tecumseh (France) or Copeland (Germany) hermetic compressors with environmentally compliant refrigerants (R134a, R404a, R23), optimized for extended service life and reduced maintenance intervals.
• High-efficiency axial-flow circulation fans with stainless steel impellers ensure uniform airflow distribution; side-blow air delivery and rear-return ducting minimize thermal stratification and achieve ≤±2.0°C chamber uniformity per IEC 60068-3-5.
• Independent heating, cooling, humidification, and dehumidification subsystems reduce cross-interference, improve control fidelity, and extend overall system longevity.
• Color touch-screen programmable controller with bilingual (English/Chinese) interface supports up to 99 programmable steps, 99 cycles, ramp-soak-hold profiles, and real-time data logging at user-defined intervals.
• Comprehensive safety architecture includes compressor discharge pressure monitoring, motor thermal overload relays, phase failure detection, ground-fault circuit interruption (GFCI), and automatic power cutoff upon fault detection—with on-screen diagnostic codes for rapid troubleshooting.
• RS-232 serial interface enables remote PC-based test sequencing, live parameter monitoring, data export (CSV), and firmware updates via proprietary Windows-compatible software.

Sample Compatibility & Compliance

The HS-408A accommodates diverse sample geometries—including printed circuit boards, molded plastic housings, metal castings, rubber seals, lithium-ion battery packs, and sensor assemblies—without requiring internal reconfiguration. Its stainless steel interior (SUS#304) and non-outgassing insulation meet cleanroom-compatible material requirements for electronics and medical device validation. The chamber satisfies key regulatory prerequisites for GLP-compliant testing environments, including audit-ready event logging (start/stop/fault timestamps), operator ID tagging, and password-protected parameter modification. While not inherently FDA 21 CFR Part 11 compliant out-of-the-box, its data export functionality and deterministic control logic support integration into validated LIMS or ELN platforms meeting Part 11 and Annex 11 requirements when deployed within documented SOP frameworks.

Software & Data Management

The embedded controller records temperature (and optional humidity) values at configurable sampling rates (1–60 sec intervals) and stores up to 10,000 data points internally. Exported datasets include absolute timestamps, setpoint deviations, alarm events, and cycle progression metadata. The companion PC software provides graphical overlay of multiple test runs, statistical summaries (mean, max/min, standard deviation), deviation trend analysis, and automated report generation compliant with ISO/IEC 17025 documentation standards. All logged data is stored in non-volatile memory with battery-backed clock retention, ensuring continuity during brief power interruptions.

Applications

• Thermal cycling validation of automotive electronics per ISO 16750-4 and AEC-Q200.
• Pre-conditioning of polymer composites prior to mechanical tensile or impact testing (ASTM D638, ISO 527).
• Stress screening of PCBAs using JEDEC J-STD-020 moisture sensitivity level (MSL) protocols.
• Storage stability assessment of pharmaceutical packaging materials under ICH Q1A(R2) long-term and accelerated conditions.
• Environmental stress screening (ESS) of avionics modules per RTCA DO-160 Section 4 and MIL-STD-810G Method 502.6.
• Qualification testing of energy storage systems (ESS) per UL 1973 and IEEE 1679.1 thermal abuse protocols.

FAQ

What temperature ranges are available for the HS-408A model?

The HS-408A is offered in three standard configurations: Type A (−20°C to +150°C), Type B (−40°C to +150°C), and Type C (−70°C to +150°C), distinguished by compressor staging and insulation thickness.
Does the chamber support humidity control?

Yes—optional humidity capability extends the operating range to 20–98% RH with surface-evaporation humidification and PID-controlled steam injection; humidity-enabled variants are designated HS-408AH/BH/CH.
Can test data be exported in CSV or Excel format?

Yes—the RS-232 interface and included software allow direct export of time-stamped temperature/humidity logs, alarm history, and cycle completion reports in CSV format for further analysis in MATLAB, Python, or statistical packages.
Is calibration certification included with shipment?

A factory-as-built temperature uniformity and deviation report (per IEC 60068-3-5) is provided. NIST-traceable calibration certificates from accredited third-party labs (e.g., A2LA or UKAS) are available as optional add-ons.
What is the expected mean time between failures (MTBF) for the refrigeration system?

Based on field data from >200 installed units, the two-stage cascade refrigeration subsystem demonstrates an MTBF exceeding 12,000 operating hours under typical 8-hour/day usage, assuming adherence to scheduled oil changes and condenser coil cleaning every 6 months.