Yuelian YL-2236 Programmable Temperature and Humidity Environmental Test Chamber

Overview

The Yuelian YL-2236 Programmable Temperature and Humidity Environmental Test Chamber is an engineered platform for accelerated environmental stress testing of materials and finished products under precisely controlled thermal and hygrothermal conditions. Based on the principle of balanced heating, refrigeration, and vapor-phase humidity regulation—achieved through integrated PID-controlled resistive heating, dual-stage hermetic refrigeration, and surface-evaporation humidification—the chamber delivers high reproducibility in simulating real-world exposure profiles. It is designed to meet the functional requirements of reliability validation per IEC 60068-2, MIL-STD-810, and GB/T 2423 series standards, supporting qualification testing across electronics, automotive components, medical devices, aerospace hardware, and polymer-based packaging systems.

Key Features

• Robust stainless-steel construction: Full SUS#304 interior and exterior cladding with 80–120 mm composite insulation (rock wool + rigid PU foam), ensuring low thermal leakage and long-term corrosion resistance.
• Intelligent climate control architecture: Dual-loop PID algorithm with SSR/SCR bidirectional power modulation enables simultaneous, decoupled regulation of temperature and humidity—minimizing overshoot and improving ramp fidelity.
• High-fidelity observation interface: Triple-layer anti-sweat viewing window with embedded heater and high-luminance fluorescent lighting supports continuous visual monitoring without condensation interference.
• Modular refrigeration design: Single-stage air-cooled system (R404A/R507) for operation above −20 °C; dual-stage cascade configuration for extended low-temperature capability down to −70 °C—optimized for oil management and refrigerant stability.
• Automated water management: Integrated reverse-osmosis purified water generator eliminates manual refilling; closed-loop recovery system reduces consumables usage and operational downtime.
• Comprehensive safety infrastructure: 15-point real-time diagnostics—including compressor overload, refrigerant pressure anomaly, heater dry-run, door interlock failure, and temperature/humidity excursion—log timestamped faults with actionable remediation guidance.
• Flexible programmability: Supports up to 150 multi-segment programs (1500 total segments), nested cycle structures (9999 × 999), and five independently definable sub-cycles—enabling complex test profiles such as thermal shock + humidity soak sequences.

Sample Compatibility & Compliance

The YL-2236 accommodates a broad range of sample geometries and mass loads across its six standard volume configurations (80 L to 800 L). Internal shelves are height-adjustable and load-rated for uniform airflow distribution. The chamber complies with structural and performance criteria outlined in ISO 16750-4 (road vehicle environmental conditions), ASTM D4332 (conditioning containers), and IEC 60068-2-1/2/14/30 for cold, dry heat, thermal shock, and damp heat testing. Optional RS-232/485 interfaces support integration into GLP/GMP environments requiring audit trails per FDA 21 CFR Part 11 when paired with validated data acquisition software.

Software & Data Management

The embedded controller provides local programming via a high-resolution color touchscreen, with full support for ramp-soak profiles, time-triggered outputs (3 configurable TTL ports), and 10 built-in timing modes for external actuator synchronization. Standard RS-232 serial communication enables remote parameter setting, real-time data streaming, and event-triggered logging. When connected to Yuelian’s optional PC-based TestLink™ software, users gain access to electronic signature-enabled report generation, trend analysis, deviation alerts, and export to CSV/PDF formats compliant with internal QA documentation protocols.

Applications

• Electronics: PCB solder joint integrity assessment under thermal cycling; connector contact resistance drift evaluation at elevated humidity.
• Automotive: Validation of infotainment display adhesion, battery module seal performance, and sensor housing dimensional stability across −40 °C to +85 °C.
• Pharmaceutical packaging: Accelerated aging studies of blister foil barrier properties under 40 °C/75 %RH (ICH Q1A) and low-RH desiccation conditions (5 %RH).
• Aerospace composites: Moisture absorption kinetics measurement in carbon fiber laminates prior to autoclave curing simulation.
• Medical devices: Biocompatibility material preconditioning per ISO 10993-12; sterilization packaging integrity verification after humidity exposure.
• Building materials: Freeze-thaw durability testing of concrete admixtures and thermal insulation boards per ASTM C666.

FAQ

What temperature and humidity ranges does the YL-2236 support?
The standard operating envelope spans −70 °C to +150 °C and 5 %RH to 98 %RH. Low-humidity variants (down to 5 %RH) are available upon request with enhanced desiccant or refrigerated coil dehumidification.
Is the chamber suitable for GMP-regulated testing?
Yes—when equipped with optional data logging software and configured with user access controls, electronic signatures, and audit trail functionality, it meets baseline requirements for 21 CFR Part 11 compliance.
How is temperature and humidity uniformity verified?
Uniformity is validated using NIST-traceable calibrated sensors placed at nine predefined locations (1 center + 8 corners) per IEC 60068-3-5, with results documented in the factory calibration certificate.
Can the YL-2236 perform thermal shock testing?
While not a dedicated thermal shock chamber, its rapid ramp rates (e.g., −70 °C → +100 °C in ≤60 min) enable quasi-shock profiles when combined with programmable dwell times and multi-step transitions.
What maintenance intervals are recommended for the refrigeration system?
Compressor oil inspection and refrigerant charge verification are advised every 12 months or 2000 operational hours—whichever occurs first—using manufacturer-specified service procedures and certified technicians.