JianHu JH-Series Temperature and Humidity Controlled Environmental Test Chamber

Overview

The JianHu JH-Series Temperature and Humidity Controlled Environmental Test Chamber is an engineered platform for precise, repeatable simulation of climatic conditions in laboratory and industrial quality assurance environments. Based on closed-loop PID-controlled heating, refrigeration, steam-based humidification, and solid-state dehumidification, the chamber maintains stable thermal and hygrometric profiles across its working volume. Its core function is to replicate real-world environmental stressors—including tropical, arid, temperate, and cyclic climate profiles—for accelerated reliability testing, material stability assessment, and process validation. Designed for compliance-driven sectors such as pharmaceuticals, electronics, aerospace, and biomedical R&D, the JH-Series supports deterministic environmental exposure protocols required by regulatory frameworks including USP , ICH Q1A(R2), and ISO 14644-1 cleanroom qualification workflows.

Key Features

• Robust air-cooled refrigeration system with high-efficiency scroll compressor and copper-aluminum finned evaporator—optimized for continuous operation under variable load conditions.
• Dual-stage humidity control: ultrasonic steam generator for rapid humidification; integrated desiccant-assisted mechanical dehumidification for precise low-RH stabilization down to 30% RH.
• High-uniformity internal airflow architecture featuring tangential multi-blade centrifugal fans and perforated baffle plates—ensuring temperature deviation ≤ ±2°C and humidity fluctuation ≤ ±3% RH throughout the workspace.
• Industrial-grade 7-inch capacitive touchscreen HMI with embedded real-time data logging, alarm history, and user-level access control (operator/administrator tiers).
• Comprehensive safety suite: independent overtemperature cut-off (mechanical backup), condensate overflow sensor, door interlock switch, and earth leakage circuit breaker (ELCB) compliant with IEC 61000-6-2.
• Structural integrity: 1.2 mm cold-rolled steel outer shell with electrostatic powder coating; 304 stainless steel inner chamber; polyurethane foam insulation (≥100 mm thickness, λ ≤ 0.022 W/m·K).

Sample Compatibility & Compliance

The JH-Series accommodates a broad range of sample configurations—from PCB assemblies and polymer films to sealed drug packaging vials and biological reference standards—without compromising environmental fidelity. Its customizable internal dimensions support standard test fixtures per MIL-STD-810H Method 502.7 (temperature), Method 507.6 (humidity), and JEDEC JESD22-A101 (steady-state bias life testing). The chamber’s control algorithm and sensor calibration traceability align with ISO/IEC 17025:2017 requirements for accredited laboratories. All units ship with factory calibration certificates referencing NIST-traceable hygrometers (Rotronic HC2-S) and PT100 Class A sensors. Optional IQ/OQ documentation packages are available for GxP-regulated installations, including 21 CFR Part 11-compliant electronic signatures and audit trail generation.

Software & Data Management

Embedded firmware supports dual-mode operation: standalone profile execution or networked supervision via Ethernet (TCP/IP) or optional RS-485 Modbus RTU. The included JianHuTest Control Suite (v4.2+) enables multi-segment ramp-soak cycling, real-time graphing of up to eight channels (T₁–T₄, RH₁–RH₄, power consumption, alarm status), and CSV/Excel export with time-stamped metadata. For enterprise integration, RESTful API endpoints allow bidirectional communication with LIMS (e.g., LabVantage, Thermo Fisher SampleManager) and MES platforms. All logged data is stored locally on a removable SD card (encrypted FAT32) and mirrored to external NAS upon configurable intervals—supporting ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available).

Applications

• Accelerated aging of lithium-ion battery cells under combined thermal-hygrometric stress (per UL 1642 Annex B and GB/T 31485).
• Stability testing of lyophilized biologics per ICH Q5C guidelines—monitoring moisture uptake kinetics at 25°C/60% RH and 40°C/75% RH.
• Environmental stress screening (ESS) of automotive ECUs prior to AEC-Q200 qualification, including temperature cycling between –40°C and +85°C with controlled humidity ramping.
• Material compatibility evaluation of medical device packaging (ISO 11607-1), particularly peel strength degradation under high-humidity storage conditions.
• Calibration verification of handheld hygrometers and infrared thermometers using NIST-traceable reference standards placed within the uniformity zone.

FAQ

What is the maximum allowable internal load mass for thermal stability?
The chamber maintains specified uniformity with up to 15% of internal volume occupied by non-ventilated thermal mass (e.g., metal racks, sealed enclosures); load-dependent derating curves are provided in the Technical Manual.
Can the JH-Series be integrated into a central building management system (BMS)?
Yes—via optional BACnet MS/TP or Modbus TCP gateway module, enabling remote monitoring of setpoints, actual values, alarm states, and energy consumption metrics.
Is third-party calibration certification available before shipment?
Yes—NIST-traceable calibration reports (including uncertainty budgets per ISO/IEC 17025) can be commissioned pre-delivery; turnaround time is 5 business days from order confirmation.
Does the system support humidity ramping during temperature transitions?
Yes—the controller executes synchronized T/RH ramps per user-defined rate limits, critical for simulating monsoon or dew-point transition scenarios.
What is the expected service life of the humidification system under continuous 85% RH operation?
With regular demineralized water usage and quarterly descaling (using citric acid solution), the ultrasonic transducer array achieves ≥12,000 hours MTBF.