Jianhu JTH-100P-A Programmable Temperature and Humidity Environmental Test Chamber

Overview

The Jianhu JTH-100P-A is a fully programmable temperature and humidity environmental test chamber engineered for precision reliability validation across industrial R&D, quality assurance, and compliance testing laboratories. It operates on the fundamental principle of controlled thermal and hygrometric conditioning—using independent heating, refrigeration, humidification, and dehumidification subsystems—to replicate real-world climatic stress profiles with high reproducibility. Designed for accelerated life testing, environmental stress screening (ESS), and qualification per international standards, this chamber enables systematic evaluation of material integrity, dimensional stability, electrical performance, and functional resilience under defined thermal-hygrometric cycles. Its robust architecture supports both static condition holding and dynamic ramp-soak profiling—including multi-step temperature/humidity sequences with programmable dwell times, rate limits, and loop repetitions—making it suitable for automotive component validation (e.g., ISO 16750-4), electronics thermal cycling (JEDEC JESD22-A104), and polymer aging studies.

Key Features

• High-grade internal chamber constructed from imported SUS304 mirror-finish stainless steel; external enclosure fabricated from powder-coated cold-rolled steel with CNC-machined structural integrity.
• Optimized thermal insulation using high-density glass fiber cotton combined with rigid polyurethane (PU) foam—minimizing heat transfer and enhancing energy efficiency.
• Large-area double-glazed observation window with integrated electrothermal anti-fog film and LED interior lighting for unobstructed, real-time sample monitoring during operation.
• Intuitive 7-inch color LCD touchscreen interface supporting intuitive parameter entry, multi-segment program editing, and graphical cycle visualization.
• Advanced PID auto-tuning algorithm with adaptive compensation for load variation, ensuring stable setpoint tracking and minimizing overshoot/undershoot.
• Standard RS-232 serial communication port compliant with Modbus RTU protocol—enabling remote monitoring, data logging via external recorders, and integration into centralized lab management systems.
• Dedicated timing relay outputs for synchronized triggering of auxiliary equipment (e.g., data acquisition units, power supplies, or optical sensors) during specific test phases.
• Comprehensive safety architecture including over-temperature, over-humidity, compressor high-pressure, motor overload, and door-open interlock protections—plus battery-backed power-loss memory to resume interrupted programs.
• Cryogenic system powered by a sealed French Tecumseh “Iron Warrior” compressor, paired with environmentally compliant refrigerants (R134a, R404a, R23) meeting current EU F-Gas and EPA SNAP regulations.
• Multi-blade centrifugal circulation fan with side-air-out / rear-air-in airflow configuration—ensuring uniform temperature and humidity distribution (±0.5°C / ±1.5% RH) and rapid recovery (<3 min) after door opening.

Sample Compatibility & Compliance

The JTH-100P-A accommodates a broad range of physical samples—from PCB assemblies and automotive ECUs to elastomeric seals, lithium-ion battery modules, and medical device housings—within its 100 L internal workspace (45 × 40 × 55 cm). Its design adheres to mechanical and environmental test requirements specified in GB/T 2423 (China National Standard), GJB 150 (Chinese Military Standard), IEC 60068-2 (Environmental Testing), ISO 16750-4 (Road Vehicles), ASTM D4332 (Conditioning of Plastics), UL 746 (Polymeric Materials), and MIL-STD-810H Method 502.8 (Temperature), Method 507.6 (Humidity). The chamber supports GLP-compliant workflows through traceable calibration records and optional audit-ready data export (CSV/Excel), though native 21 CFR Part 11 compliance requires third-party software validation.

Software & Data Management

The embedded controller firmware provides full-cycle programmability—including up to 99 segments per profile, 999 loops, and user-defined ramp rates (0.1–5.0°C/min, 0.1–10% RH/min). Real-time operational data (chamber temperature, relative humidity, setpoints, alarm status) are displayed continuously and logged internally at configurable intervals (1–60 sec). Export is supported via USB flash drive or RS-232 to PC-based applications such as Jianhu’s optional LabView-compatible DAQ software or generic SCADA platforms. All logged datasets include timestamped metadata (start time, operator ID, program name), enabling traceability for internal QA audits or regulatory submissions.

Applications

• Accelerated aging of polymers, adhesives, and coatings under cyclic humidity exposure (e.g., ISO 4611).
• Thermal shock pre-conditioning prior to HALT/HASS testing of electronic subassemblies.
• Storage stability assessment of pharmaceutical packaging per ICH Q1A(R2) guidelines.
• Corrosion resistance validation of metallic components under high-humidity salt-spray preconditioning (ASTM B117 + humidity hold).
• Functional verification of HVAC control systems under extreme ambient conditions.
• Material coefficient of thermal expansion (CTE) estimation via dimensional metrology during controlled thermal ramps.

FAQ

What is the difference between P-type and S-type models?
The “P” designation indicates a touch-screen programmable controller with high-resolution temperature/humidity control (0.01°C / ±0.1% RH), while “S” refers to microprocessor-based digital display units with lower resolution (1°C / ±1% RH) and fixed-setpoint operation.
Can the chamber operate at −70°C continuously?
Yes—when configured with Option E (−70 to 150°C), the dual-stage refrigeration system maintains continuous operation at −70°C with humidity disabled, subject to ambient room conditions ≤25°C and ≤60% RH.
Is calibration certification included with shipment?
A factory calibration report (traceable to NIM, China) is provided; ISO/IEC 17025-accredited third-party calibration is available upon request.
What maintenance is required for long-term reliability?
Recommended quarterly checks include condensate drain line inspection, air filter cleaning, refrigerant pressure verification, and verification of sensor drift using NIST-traceable reference hygrometers and dry-well calibrators.
Does the chamber support Ethernet or USB host connectivity?
Standard configuration includes only RS-232; Ethernet or USB host interfaces are available as optional hardware upgrades with corresponding firmware updates.