Jianhu JH-THC Series High-Low Temperature & Humidity Environmental Test Chamber

Overview

The Jianhu JH-THC Series High-Low Temperature & Humidity Environmental Test Chamber is an engineered solution for accelerated environmental stress testing in compliance with evolving industrial validation requirements—including GB/T 2423.3–2025, IEC 60068-2-78, and ISO 16750-4. Designed around a dual-chamber air-circulation architecture with PID-controlled refrigeration and steam-based humidification, the system maintains precise thermal-hygrometric conditions across wide operational envelopes. Its core measurement principle relies on high-stability Pt100 RTD sensors (Class A tolerance), redundant humidity transducers (capacitive polymer type), and real-time feedback loops that dynamically adjust heating/cooling power and steam injection rate. The chamber supports both static and dynamic environmental profiling—enabling step, ramp, soak, and cycling test protocols essential for reliability qualification of electronic assemblies, semiconductor packaging, EV battery modules, and medical-grade components.

Key Features

• Explosion-proof configuration compliant with Ex ib IIB T4 (IEC 60079-0, -11), certified for use in hazardous locations handling flammable solvents or battery electrolytes
• Electrostatic-dissipative stainless-steel interior (surface resistivity <1×10⁶ Ω/sq) standard on electronics-grade models; optional low-dust polished finish for cleanroom-compatible operation
• Low-humidity capability down to 1% RH (dew point ≤ -70°C) achieved via multi-stage desiccant-assisted dehumidification—validated per IEST-RP-CC018.3 for semiconductor wafer-level testing
• Integrated industrial Ethernet interface (Modbus TCP / OPC UA) enabling native MES integration and time-synchronized data streaming to SCADA or LIMS platforms
• Robust mechanical architecture featuring double-wall vacuum-insulated panels, hermetically sealed door gaskets, and vibration-isolated compressor mounts for long-term stability under continuous duty cycles
• Pre-installed audit trail functionality meeting FDA 21 CFR Part 11 requirements: user-authenticated access, immutable event logging, and electronic signature support for calibration records

Sample Compatibility & Compliance

The JH-THC series accommodates diverse sample geometries—from PCB subassemblies and 12-inch wafers to 300 mm × 300 mm × 300 mm automotive control units—within customizable internal chambers. All configurations comply with GB/T 2423.3–2025 for humidity testing, GB/T 2423.1–2023 (cold) and GB/T 2423.2–2023 (heat), and are validated per ISO/IEC 17025 for measurement uncertainty reporting. Optional IP54-rated enclosures satisfy dust/water ingress protection requirements for outdoor component validation (e.g., EV charging interfaces). Each unit ships with a CNAS-accredited factory calibration certificate covering temperature (±0.2°C at reference points), humidity (±1.5% RH from 10–98% RH), and temporal stability metrics. Traceable calibration intervals are configurable within the embedded software to align with GLP/GMP quality management systems.

Software & Data Management

Control and monitoring are executed via the Jianhu TestSuite™ v4.2 platform—a Windows-based application supporting multi-user role assignment (Operator, Engineer, QA Auditor), real-time graphing, and automated report generation (PDF/CSV/XLSX). All test sequences are stored as XML-based protocol files with version control and digital signature verification. Raw sensor data (sampled at 1 Hz) is timestamped with NTP-synchronized UTC and archived locally on encrypted SSD storage (minimum 3-year retention). Remote diagnostics via TLS-secured HTTPS enable predictive maintenance alerts (e.g., compressor efficiency drift, humidity sensor drift >0.8% RH/year). Audit logs capture every parameter change, user login/logout, calibration execution, and alarm acknowledgment—exportable in CSV format for regulatory submission.

Applications

• Qualification testing of SiC power modules under combined thermal cycling (-40°C ↔ +150°C) and 85/85 humidity stress per AEC-Q101
• Accelerated life testing of lithium-ion pouch cells at 45°C/95% RH to assess electrolyte decomposition kinetics
• Validation of optical sensor housings for aerospace avionics using low-humidity soak (1% RH, -20°C) followed by rapid thermal transition
• Stability assessment of biopharmaceutical excipients per ICH Q1A(R3) guidelines requiring controlled humidity exposure at 25°C/60% RH
• Environmental screening of 5G RF front-end modules under simultaneous temperature gradient and ESD-safe conditions

FAQ

Does the JH-THC chamber support full traceability for ISO 13485-certified medical device manufacturers?
Yes. The system includes configurable electronic signatures, ALCOA+ compliant data integrity controls, and exportable audit trails meeting Annex 11 and MDSAP requirements.

Can the chamber be integrated into an existing MES without custom middleware?
Yes. Native Modbus TCP and OPC UA server functionality enables direct communication with Siemens SIMATIC IT, Rockwell FactoryTalk, and GE Proficy platforms without third-party gateways.

What is the recalibration interval recommendation under GLP conditions?
Jianhu recommends annual full-system recalibration against NIST-traceable standards, with quarterly functional checks using certified reference materials (e.g., Saturated Salt Solutions per ISO 4885).

Is low-dust interior construction available for Class 1000 cleanroom deployment?
Yes. Optional electropolished 316L stainless steel interior with passivation treatment and HEPA-filtered air recirculation meets ISO 14644-1 Class 6 requirements.

How is explosion-proof certification verified during installation?
On-site verification includes continuity testing of grounding paths (<1 Ω), inspection of flameproof joint tolerances (per IEC 60079-1), and documentation review of equipment protection level (EPL) Gb/Da ratings.