JianHu JH-Series Programmable Temperature and Humidity Chamber | Thermal Shock Test System | Walk-in Environmental Test Room

Overview

The JianHu JH-Series Programmable Temperature and Humidity Chamber is an integrated environmental test platform engineered for precision stability, programmable profile execution, and long-term operational reliability in laboratory and industrial quality assurance settings. Designed in accordance with core principles of psychrometric control and forced-air thermal convection, the system delivers tightly regulated temperature and humidity conditions across a defined operational envelope (15–45°C / 30–98% RH). Its architecture incorporates high-stability platinum resistance thermometers (PT100), capacitive humidity sensors with auto-calibration compensation, and a dual-loop PID control algorithm to minimize overshoot and ensure steady-state convergence within specified tolerances. The chamber supports both static conditioning and dynamic cycling protocols—making it suitable not only for standard IEC 60068-2-30, GB/T 2423.3, and ISO 6270 compliance testing but also as a foundational subsystem in multi-stage reliability workflows involving thermal shock or combined environmental stress screening (CESS).

Key Features

• Programmable multi-segment environmental profiles: Up to 120-step sequences with independent ramp/soak parameters for temperature and humidity; user-defined dwell times, rate limits, and loop repetitions.
• Water-cooled refrigeration system with scroll compressor and microchannel condenser—optimized for stable low-humidity operation and reduced ambient heat rejection in controlled laboratory environments.
• Uniform airflow distribution via tangential blower and perforated baffle ducting ensures spatial temperature deviation ≤ ±2°C and humidity deviation ≤ ±3% RH across the working volume (validated per ASTM E744).
• Integrated safety architecture: Real-time monitoring of refrigerant pressure, heater current, chamber door interlock status, and sensor redundancy validation; automatic shutdown with audible/visual alarm upon fault detection.
• Modular structural design: Stainless steel inner chamber, polyurethane foam insulation (≥120 mm thickness), and double-gasketed insulated door with pneumatic sealing assist for minimized thermal leakage and improved energy efficiency.

Sample Compatibility & Compliance

The JH-Series accommodates a broad range of sample types—including PCB assemblies, polymer components, optical sensors, battery modules, and packaged pharmaceuticals—within its upright configuration. Its temperature and humidity control performance meets the repeatability and reproducibility requirements outlined in ISO/IEC 17025-accredited laboratories for environmental conditioning prior to mechanical, electrical, or chemical testing. While the base model operates within a moderate climate envelope (15–45°C / 30–98% RH), optional upgrades—including extended-range controllers, enhanced dehumidification modules, and external dew point monitoring interfaces—enable alignment with specific clauses of MIL-STD-810H Method 507.6 (Humidity), IPC-J-STD-033 (Moisture Sensitivity Level preconditioning), and USP for pharmaceutical stability storage simulation. All firmware and control logic are architected to support audit-ready data integrity per FDA 21 CFR Part 11 when paired with validated software configurations.

Software & Data Management

The embedded controller features a 7-inch TFT-LCD touchscreen interface with multilingual support (English, Chinese, Japanese, Korean) and onboard logging of up to 10,000 data points at user-selectable intervals (1 s to 60 min). Raw sensor outputs—including PT100 resistance values, humidity capacitance readings, and compressor duty cycle—are timestamped and stored with CRC-32 checksum verification. Optional Ethernet or RS485 connectivity enables integration into centralized LIMS or MES platforms via Modbus TCP/RTU or OPC UA protocols. The companion JianHu LabManager™ PC software (v4.2+) provides real-time remote supervision, automated report generation (PDF/CSV), trend analysis with statistical process control (SPC) overlays, and electronic signature-capable test record archives compliant with GLP and GMP documentation standards.

Applications

This chamber serves as a primary tool for accelerated aging studies in electronics manufacturing (e.g., moisture absorption evaluation of conformal coatings), material hygroscopicity characterization (wood, composites, textiles), shelf-life determination of hygroscopic excipients in solid-dose formulations, and pre-test conditioning of sensors prior to vibration or ingress protection validation. In academic research, it supports controlled fungal growth assays, polymer crystallinity kinetics under variable RH, and corrosion mechanism studies on coated metallic substrates. Its compact footprint and scalable control architecture make it particularly suited for university teaching labs, contract testing facilities, and R&D departments requiring traceable, repeatable environmental exposure without full walk-in infrastructure investment.

FAQ

What is the maximum allowable sample load volume relative to chamber capacity?
Maximum recommended payload is 30% of internal chamber volume to maintain specified uniformity and response time specifications.
Does the system support external data export to CSV or Excel formats?
Yes—via USB flash drive or network transfer using JianHu LabManager™; all exported files include metadata headers, calibration traceability tags, and UTC timestamps.
Is third-party calibration certification available?
Calibration services conforming to ISO/IEC 17025 are offered through JianHu’s accredited metrology partner network; NIST-traceable certificates include as-found/as-left data and uncertainty budgets.
Can the chamber be integrated with existing building management systems (BMS)?
Yes—using optional BACnet MS/TP or Modbus TCP gateways; digital I/O signals (alarm, run status, fault) are configurable for hardwired BMS interfacing.
What maintenance schedule is recommended for optimal long-term performance?
Quarterly inspection of condensate drain lines and air filter elements; annual verification of sensor drift and refrigerant charge level by certified service technician.