Apkji AP-KF-C Walk-in Environmental Test Chamber

Overview

The Apkji AP-KF-C Walk-in Environmental Test Chamber is an industrial-grade, fully customizable thermal stress testing system engineered for large-scale reliability validation of electronic assemblies, automotive components, aerospace subsystems, and industrial equipment. Designed around a robust dual-wall insulated enclosure with high-density polyurethane foam (≥100 mm thickness), the chamber employs forced-air convection via multi-blade centrifugal circulation fans to achieve uniform thermal distribution across volumetric test spaces ranging from 6 m³ to 50 m³—or beyond, per client specification. Its core operational principle relies on closed-loop PID-controlled heating, refrigeration, and optional humidification subsystems, enabling precise replication of real-world environmental profiles—including extended high-temperature aging (up to +85 °C), low-temperature storage (down to −40 °C), and rapid thermal transition cycles. The system meets foundational thermal test requirements defined in IEC 60068-2-2 (Test Bb), GB/T 2423.2, and GJB 150.3, serving as a compliant platform for qualification testing under GLP-aligned laboratory practices.

Key Features

• Modular structural design with double-layer stainless steel inner walls and seamless welded joints for long-term corrosion resistance and thermal integrity
• High-efficiency air-cooled or water-cooled refrigeration system using environmentally compliant R404A/R507 dual-stage cascade compressors for stable sub-zero operation
• Industrial-grade programmable logic controller (PLC) paired with a 10.4″ full-color TFT touchscreen HMI offering intuitive parameter setup, real-time trend visualization, and alarm history logging
• Multi-point temperature monitoring (standard 9-sensor array) with independent calibration traceability per IEC 60751 Class A RTDs
• Comprehensive safety architecture including over-temperature cut-off, compressor high-pressure shutdown, door interlock switches, and phase-loss protection
• Optional integrated humidity control module (5–95% RH, ±3% RH accuracy) with steam generator and dehumidification capability down to 5 °C/10% RH
• RS-232C and optional RS-485/Ethernet interfaces supporting Modbus RTU/TCP protocol for SCADA integration and remote supervisory control

Sample Compatibility & Compliance

The AP-KF-C accommodates oversized test specimens—such as vehicle ECUs, server racks, battery packs, and avionics enclosures—without dimensional compromise. Its walk-in configuration supports ergonomic operator access, internal lighting, observation windows with anti-fog coating, and configurable shelving or floor-mounted anchor points. All thermal performance metrics—including temperature uniformity (≤2.0 °C), stability (±0.5 °C), and control resolution (0.05 °C)—are verified per GB/T 5170.2-2008 and validated using NIST-traceable reference sensors. The chamber conforms to electrical safety standards IEC 61000-4 (EMC immunity) and GB 4793.1 (safety of laboratory equipment). It supports audit-ready documentation packages aligned with ISO/IEC 17025 and FDA 21 CFR Part 11 when equipped with optional electronic signature-capable software modules.

Software & Data Management

Standard firmware includes built-in data logging at user-defined intervals (1 s to 60 min), with onboard storage for ≥30 days of continuous 10-channel records. Export formats include CSV and PDF reports compliant with GLP documentation requirements. Optional PC-based ApkjiEnviroSuite™ software enables centralized fleet monitoring, automated report generation (including pass/fail evaluation against preset limits), and long-term trend analysis. Audit trails record all parameter modifications, user logins, and alarm events with timestamp, operator ID, and IP address. When deployed in regulated environments, the system supports 21 CFR Part 11-compliant electronic signatures, role-based access control, and immutable archive export for regulatory submissions.

Applications

• Accelerated life testing (ALT) and high-temperature operating life (HTOL) qualification of semiconductor devices and power electronics
• Thermal cycling validation of EV battery modules per UN ECE R100 and ISO 16750-4
• Environmental stress screening (ESS) of military-grade hardware per MIL-STD-810H Method 501.7
• Pre-shipment conditioning of medical imaging systems and diagnostic analyzers per IEC 60601-1 clause 11.2
• Material compatibility studies involving polymer aging, sealant degradation, and adhesive bond strength retention
• Calibration laboratory support for secondary standard maintenance under ISO/IEC 17025 Clause 6.4

FAQ

What is the minimum and maximum internal volume available for customization?
Standard configurations range from 6 m³ to 50 m³; volumes outside this range are supported upon engineering review and structural feasibility assessment.
Can the chamber be configured for combined temperature and humidity profiling?
Yes—optional humidity control extends the operational envelope to 5–95% RH with independent precision regulation, subject to ambient dew point constraints.
Is third-party calibration certification included with delivery?
Factory calibration with NIST-traceable certificate is provided; ISO/IEC 17025-accredited field calibration services are available as an add-on.
What safety certifications does the AP-KF-C hold?
The system complies with GB 4793.1 (equivalent to IEC 61010-1), CE marking (EMC & LVD directives), and RoHS 2011/65/EU. UL/cUL listing is available upon request with additional testing.
How is temperature uniformity validated during commissioning?
Uniformity is measured per GB/T 5170.2-2008 using nine calibrated PT100 sensors placed at standardized locations (center + six face centers + two corners), with results documented in the final IQ/OQ report.