JianHu JH Series Programmable Temperature and Humidity Environmental Test Chamber

Overview

The JianHu JH Series Programmable Temperature and Humidity Environmental Test Chamber is an engineered solution for accelerated environmental stress testing under controlled thermal and hygroscopic conditions. Designed in accordance with ISO 16750-4, IEC 60068-2-30, and GB/T 10586 standards, this chamber employs a dual-loop PID control architecture with high-stability platinum resistance temperature sensors (PT100) and capacitive humidity transducers to maintain precise, repeatable test environments. Unlike basic storage chambers, the JH Series implements dynamic wet/dry cycling capability—enabling programmable transitions between temperature setpoints and relative humidity levels within a single test sequence. This supports standardized evaluation of material degradation, seal integrity, condensation resistance, and long-term reliability across electronics, automotive components, polymer packaging, and medical device enclosures. The chamber’s air-cooled refrigeration system utilizes a hermetic Danfoss compressor paired with a copper-aluminum finned evaporator and optimized airflow ducting to ensure stable operation across its full operational envelope.

Key Features

• Programmable multi-segment test profiles: Up to 120 user-defined steps per program, each configurable with independent temperature, humidity, dwell time, ramp rate, and cycle count.
• Dual independent control loops: Separate proportional-integral-derivative (PID) algorithms govern heating/cooling and humidification/dehumidification subsystems, minimizing cross-coupling effects during transient conditions.
• Uniform internal environment: Engineered air distribution system achieves temperature uniformity ≤±1°C and humidity uniformity ≤±3% RH across the entire working volume, verified per IEC 60068-3-5.
• Robust safety architecture: Includes over-temperature cut-off (mechanical and electronic), compressor over-current protection, phase failure detection, water level monitoring for humidifier reservoir, and ground-fault circuit interruption (GFCI).
• Corrosion-resistant construction: Inner chamber fabricated from SUS304 stainless steel; insulated double-wall structure with polyurethane foam (≥80 mm thickness, 0.022 W/m·K thermal conductivity).
• Real-time data logging: Built-in non-volatile memory stores timestamped temperature/humidity readings at user-selectable intervals (1 s to 60 min); exportable via USB or RS485 to CSV or Excel-compatible formats.

Sample Compatibility & Compliance

The JH Series accommodates a broad range of physical sample configurations—including PCB assemblies, plastic housings, battery modules, optical lenses, and sealed consumer electronics—without requiring internal fixtures or modifications. Its vertical upright design allows for flexible placement of test specimens on adjustable stainless-steel shelves (standard load capacity: 15 kg/shelf). The chamber meets essential regulatory requirements for laboratory use, including conformity with CE marking directives (2014/30/EU EMC, 2014/35/EU LVD), RoHS 2011/65/EU compliance, and electrical safety certification per IEC 61010-1. For GxP environments, optional audit-trail-enabled firmware supports 21 CFR Part 11-compliant electronic records when integrated with validated third-party data acquisition software. Calibration certificates traceable to NIM (National Institute of Metrology, China) are available upon request.

Software & Data Management

The embedded controller features a 7-inch TFT-LCD touchscreen interface with intuitive icon-based navigation and multilingual support (English, Chinese, Spanish, German). Firmware includes password-protected administrator mode for parameter locking, user access level management (operator, engineer, supervisor), and automatic firmware update capability via USB drive. Optional PC-based JianHuTest Control Suite (v4.2+) provides advanced scheduling, remote monitoring via Ethernet/Wi-Fi, real-time graphing with overlay comparison of multiple test runs, statistical process control (SPC) charting, and automated report generation compliant with ISO/IEC 17025 documentation requirements. All logged data include digital signatures, timestamps, and metadata (operator ID, program name, chamber ID), satisfying GLP/GMP record retention mandates.

Applications

• Electronics reliability validation: Thermal cycling combined with high-humidity exposure to assess solder joint fatigue, conformal coating delamination, and moisture ingress in MEMS devices.
• Automotive component qualification: Simulating under-hood thermal soak followed by rapid humidity ramping to evaluate gasket compression set and connector corrosion resistance per SAE J2245.
• Pharmaceutical packaging stability: Accelerated aging studies of blister packs and HDPE bottles under controlled RH conditions to predict shelf-life per ICH Q1A(R2).
• Material science research: Investigating hygrothermal expansion coefficients of composite laminates, hydrolytic degradation kinetics of biopolymers, and glass transition shifts in thermoplastics.
• Quality assurance in manufacturing: In-process verification of environmental conditioning prior to final assembly or functional testing—particularly for aerospace avionics and industrial sensors.

FAQ

What standards does the JH Series comply with for environmental testing?
The chamber conforms to ISO 16750-4 (road vehicles), IEC 60068-2-30 (damp heat cyclic), GB/T 2423.4 (Chinese national standard equivalent), and ASTM D4332 (conditioning of plastics). Full test reports can be generated using built-in compliance templates.
Can the chamber perform sub-zero temperature testing?
No—the standard JH Series operates within 15–45°C. For low-temperature applications (e.g., −40°C), JianHu offers the JH-CT series with cascade refrigeration and enhanced insulation.
Is remote monitoring supported out-of-the-box?
Yes—Ethernet connectivity is standard; optional Wi-Fi module enables cloud-based status alerts and live parameter viewing via secure HTTPS portal.
How often does the humidity sensor require recalibration?
Capacitive RH sensors are factory-calibrated and maintain accuracy within ±2% RH for 12 months under normal operating conditions. Annual recalibration against NIST-traceable reference hygrometers is recommended for ISO/IEC 17025-accredited labs.
Does the system support custom alarm notifications?
Yes—up to eight programmable alarm thresholds (e.g., deviation >±2.5°C, humidity drift >±5% RH) can trigger email/SMS alerts via integrated SMTP client or Modbus TCP output to building management systems.