Jiubin Instruments JB-GDWSR Environmental Test Chamber (Temperature & Humidity)

Overview

The Jiubin Instruments JB-GDWSR Environmental Test Chamber is an engineered solution for precise, repeatable simulation of combined temperature and humidity stress conditions in industrial quality control, R&D laboratories, and certification testing environments. Designed according to fundamental principles of thermodynamic equilibrium and psychrometric control, the chamber employs a cascaded refrigeration system to achieve stable operation across a wide thermal range—from deep freezing at −65 °C to elevated temperatures up to +100 °C—while maintaining programmable relative humidity between 40 % and 95 % RH. Its dual-control architecture integrates independent regulation of dry-bulb temperature and moisture content via saturated steam injection and precision condensation management, enabling accurate replication of real-world environmental profiles required for accelerated aging, reliability validation, and compliance verification.

Key Features

• Mirror-finish SUS304 stainless steel inner chamber with seamless, rounded corner geometry—minimizing contamination traps and facilitating cleaning and validation under GLP/GMP protocols.
• Cascaded refrigeration system featuring original Tecumseh (France) hermetic compressors—providing long-term stability, low vibration, and consistent cooling performance across extreme low-temperature setpoints.
• Microprocessor-based PID temperature & humidity controller with dual digital display—supporting auto-tuning, ramp-soak programming, and real-time deviation monitoring with ±0.5 °C temperature uniformity throughout the working volume.
• Optimized air circulation system incorporating low-noise, high-efficiency German-sourced centrifugal blowers and calibrated duct geometry—ensuring spatial homogeneity and minimizing thermal stratification.
• Standard 30 mm diameter access port on left side wall—designed for feedthrough of sensor leads, power cables, or data lines without compromising chamber integrity or seal performance.
• Comprehensive multi-layer safety architecture—including compressor overheat protection, fan failure detection, high-pressure cut-off, phase-loss monitoring, overload tripping, overtemperature interlock, and low-water-level alarm—fully compliant with IEC 61000-6-2/6-4 EMC requirements.

Sample Compatibility & Compliance

The JB-GDWSR accommodates diverse sample geometries and material classes—including electronic assemblies, polymer components, automotive modules, aerospace composites, and pharmaceutical packaging—within its four standard internal volume configurations. Its structural design conforms to international environmental testing standards including GB/T 2423.1–2001 (cold), GB/T 2423.2–2001 (dry heat), GB/T 2423.3–1993 (damp heat, steady state), GB/T 2423.4–1993 (damp heat, cyclic), and GB 10592–1989 (temperature chamber specifications). While not certified to IEC 60068 or MIL-STD-810 by default, the chamber’s control fidelity, sensor traceability (PT100 Class A), and documented calibration pathways support full audit readiness for ISO/IEC 17025-accredited laboratories conducting method-validated tests.

Software & Data Management

The embedded controller supports optional RS485/Modbus RTU communication for integration into centralized lab monitoring systems (e.g., LabVIEW, SCADA, or custom MES platforms). When equipped with the optional thermal printer module, the unit provides hard-copy output of test logs—including timestamped setpoint/actual values, alarm events, and cycle completion flags—with configurable print intervals. All operational parameters are stored internally with non-volatile memory retention; data export requires external logging via serial interface. The firmware architecture supports user-defined test profiles with up to 99 segments per program, including hold, ramp, and loop functions—enabling execution of complex sequences aligned with ASTM D4332, ISO 11702, or IPC-9701 requirements.

Applications

• Accelerated life testing of printed circuit boards (PCBs) and solder joints under thermal cycling and humidity bias conditions.
• Stability assessment of active pharmaceutical ingredients (APIs) and final dosage forms per ICH Q1A(R2) guidelines.
• Environmental stress screening (ESS) of avionics and military-grade electronics per MIL-STD-883 Method 1010.8.
• Material property evaluation—including dimensional stability, outgassing behavior, and hygroscopic swelling—of polymers, elastomers, and composite laminates.
• Pre-conditioning of sensors, optical components, and MEMS devices prior to functional calibration or metrological characterization.
• Validation of packaging barrier performance for medical devices under controlled humidity exposure per ISO 11607-1 Annex B.

FAQ

Does the JB-GDWSR support programmable humidity ramping during temperature cycles?
Yes—the controller enables synchronized ramping of both temperature and relative humidity within a single test profile, subject to physical psychrometric limits and chamber response time.
Is third-party calibration documentation available for the PT100 sensors?
Calibration certificates traceable to NIM (National Institute of Metrology, China) are provided upon request and may be extended to ISO/IEC 17025-accredited labs for additional fee.
Can the unit operate continuously at −65 °C with 95 % RH?
No—simultaneous extreme low temperature and high humidity is physically constrained by dew point limitations; the operational envelope reflects achievable combinations per ASHRAE Fundamentals Chapter 1.
What is the recommended maintenance interval for the refrigeration system?
Compressor oil and filter-drier replacement is advised every 24 months under continuous operation; annual inspection of condenser coils and steam generator electrodes is required.
Is the chamber compatible with FDA 21 CFR Part 11-compliant data archiving?
The base controller does not include electronic signature, audit trail, or role-based access control; however, integration with validated external data acquisition systems can satisfy Part 11 requirements.