Jianhu JTH Programmable Temperature and Humidity Environmental Test Chamber

Overview

The Jianhu JTH Programmable Temperature and Humidity Environmental Test Chamber is an engineered solution for accelerated reliability assessment under dynamically controlled thermal and hygrothermal stress conditions. Based on the principle of forced-air convection with dual-stage refrigeration and precision steam-humidification, the chamber delivers repeatable, traceable environmental profiles aligned with international test standards including IEC 60068-2, MIL-STD-810H, GB/T 2423, and JEDEC JESD22-A104/A110. It is designed for laboratory-based validation of product robustness across electronics, automotive components, aerospace subsystems, polymer materials, and display technologies—where thermal cycling, cold soak, high-humidity dwell, and combined temperature–humidity ramping are critical qualification steps.

Key Features

• High-fidelity microprocessor controller with 7-inch full-color touchscreen LCD, supporting both English and Chinese UI; programmable via intuitive touch dialog boxes without syntax input.
• Scalable program architecture: up to 150 independent test programs, each configurable with up to 1500 time–temperature–humidity segments; segments support variable ramp rates, dwell times, and conditional branching.
• Dual independent safety layers: primary PID control loop integrated with a hardware-isolated electronic over-temperature cut-off device—settable independently from operational parameters for DUT-specific thermal safeguarding.
• Structural integrity optimized for long-term stability: inner chamber fabricated from mirror-finished SUS#304 stainless steel; outer shell finished with electrostatic powder coating; 100 mm composite insulation (polyurethane foam + high-density glass fiber) minimizes thermal bridging and energy loss.
• Optimized observation system: dual-side viewing windows (740 mm W × 760 mm H) with anti-fog coating—eliminating need for mechanical wipers while maintaining optical clarity during condensing humidity cycles.
• Integrated utility interfaces: standardized 50 mm diameter access port (left side), dedicated DUT power interlock circuitry, and auto-refill water system with external reservoir compatibility and closed-loop recycling capability.
• Standard industrial communications: native RS-232 and RS-485 ports enable centralized multi-chamber monitoring, remote parameter adjustment, and synchronized data logging via SCADA or custom LabVIEW/Python environments.

Sample Compatibility & Compliance

The JTH chamber accommodates a broad range of sample geometries and thermal mass profiles—from compact PCB assemblies and OLED submodules to large-scale automotive ECUs and metal alloy specimens. Its uniformity performance (±1.5 °C at 100 L load, per IEC 60068-3-5) ensures representative stress exposure across the working volume. The system supports compliance-driven workflows: audit-ready event logs (including fault history with timestamps and root-cause codes), user-access-level permissions, and optional CF card-based electronic record retention compliant with GLP and FDA 21 CFR Part 11 requirements when paired with validated software. Humidity control (20–98% RH, ±2.5% RH accuracy) meets ISO 17025-accredited calibration traceability protocols when operated with NIST-traceable hygrometers.

Software & Data Management

Controller firmware includes embedded curve synthesis: real-time plotting of actual vs. setpoint trajectories for temperature and relative humidity, with timestamped overlay and export in CSV format. Historical data—including alarm events, sensor drift diagnostics, compressor cycle counts, and ambient condition offsets—is stored in non-volatile memory and retrievable via USB or serial interface. Optional 256 MB CF card module replaces analog chart recorders, enabling configurable sampling intervals (1 s to 60 min), automatic file rotation, and self-diagnostic reporting. All logged data retains immutable metadata (operator ID, program name, start/stop epoch, firmware revision), satisfying documentation requirements for ISO 9001 internal audits and third-party certification bodies.

Applications

• Electronics reliability screening: thermal shock testing of BGA solder joints, moisture sensitivity level (MSL) evaluation per J-STD-020, and bias-HAST simulation for encapsulated ICs.
• Display technology validation: accelerated aging of TFT-LCD backlight units, OLED emissive layer degradation under high-temperature/high-RH conditions, and LTPS transistor threshold voltage shift analysis.
• Automotive component qualification: climate endurance testing of ADAS sensors, infotainment control modules, and battery management systems per LV-124 and GMW15021 specifications.
• Material science research: hygrothermal expansion coefficient measurement of thermoplastics, corrosion rate acceleration of coated metals, and polymer crosslinking kinetics under cyclic humidity.
• Quality assurance laboratories: incoming inspection of supplier parts, lot-release verification, and failure analysis correlation between field returns and lab-replicated stress profiles.

FAQ

What refrigerants are used in the JTH chamber, and are they compliant with current environmental regulations?
The system employs R134a (for medium-temperature stages), R404a (low-temperature cascade), and R23 (ultra-low-stage), all classified as zero-ozone-depletion-potential (ODP = 0) refrigerants and approved under the EU F-Gas Regulation and U.S. EPA SNAP program.
Can the controller log data continuously during unattended operation?
Yes—the embedded controller records all process variables at user-defined intervals; with the optional CF card module, logging persists for >12 months at 10-second resolution without host PC dependency.
Is the chamber suitable for testing samples that require electrical bias during environmental exposure?
Absolutely—the left-side 50 mm test port is gasket-sealed and rated for IP54 ingress protection, supporting insulated feedthroughs for DC/AC power, signal lines, or thermocouple extensions with minimal thermal leakage.
How is temperature uniformity verified across the working volume?
Uniformity is characterized per IEC 60068-3-5 using nine calibrated PT100 sensors arranged in a 3×3 vertical grid; results are documented in the factory acceptance test (FAT) report shipped with each unit.
Does the system support integration into an existing MES or LIMS environment?
Via RS-485 Modbus RTU protocol, the chamber exposes real-time setpoints, measured values, status flags, and alarm codes—enabling direct ingestion into manufacturing execution systems without middleware.