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. Designed in accordance with international test standard methodologies—including ISO 16750-4, ASTM D4332, IEC 60068-2-1, IEC 60068-2-2, and GB/T 2423.1–2423.3—this chamber enables reproducible simulation of real-world climatic exposures such as extreme cold, high-temperature bake, cyclic humidity, and combined temperature/humidity profiles. Its dual-mode refrigeration architecture (unary air-cooled system for ≥−20 °C operation; binary air-cooled system for ≤−40 °C operation) ensures thermodynamic stability across the full −70 °C to +150 °C range. The chamber employs balance-adjustment control logic—simultaneously modulating heating, humidification, and dehumidification subsystems—to maintain dynamic equilibrium without overshoot or hysteresis, thereby meeting stringent requirements for GLP-compliant validation protocols and long-duration qualification tests.

Key Features

• Full stainless-steel construction (SUS#304) for corrosion resistance and cleanroom compatibility
• High-fidelity control architecture: platinum RTD sensors (IEC 60751 Class A), dual PID+SSR/SCR bidirectional output, slope-based ramp/soak logic
• Advanced programmability: up to 120 user-defined programs, each supporting 1200 segments; 999-cycle nesting with five independent sub-loop partitions
• Integrated water purification: built-in reverse-osmosis-grade circulating supply system eliminates manual refilling and reduces mineral scaling risk
• Dual safety layer: primary microprocessor-based thermal regulation + secondary independent electronic overtemperature limiter (field-configurable)
• Comprehensive diagnostics: 15-point real-time system health monitoring with auto-log timestamping, fault categorization, and remediation guidance
• Flexible data acquisition: RS-232 and RS-485 interfaces support multi-chamber networked supervision via SCADA or LIMS platforms
• Optional CF card logger (256 MB): replaces mechanical chart recorders; supports user-selectable sampling intervals (1 s to 60 min) and onboard self-diagnostics

Sample Compatibility & Compliance

The YL-2236 accommodates a broad spectrum of test specimens—from PCB assemblies and lithium-ion battery modules to polymer films, automotive gaskets, pharmaceutical packaging, and aerospace composites—within its scalable internal volumes (80 L to 1000 L). Its ±0.5 °C temperature uniformity and ±2.5 %RH humidity uniformity meet the spatial homogeneity criteria specified in ISO 16750-4 Annex C and ASTM D4332 Section 6. All models are CE-marked per Machinery Directive 2006/42/EC and EMC Directive 2014/30/EU. The controller firmware supports audit trail generation compliant with FDA 21 CFR Part 11 when paired with validated PC-based data acquisition software. Optional IQ/OQ documentation packages are available for GMP-regulated environments requiring traceable installation and operational qualification.

Software & Data Management

Control is executed via a bilingual (English/Chinese) capacitive touchscreen HMI with intuitive drag-and-drop programming interface. All setpoints, ramp rates, dwell times, and humidity transitions are defined using segment-based syntax compatible with industry-standard test specifications (e.g., MIL-STD-810H Method 502.6). Real-time curve visualization renders both target and actual temperature/humidity trajectories during test execution. Historical data—including sensor readings, actuator states, alarm events, and calibration logs—is stored internally and exportable via USB or serial link in CSV format. When integrated with third-party laboratory information management systems (LIMS), the RS-485 interface enables remote start/stop commands, parameter updates, and automated report generation aligned with ISO/IEC 17025 clause 7.7 requirements.

Applications

• Electronics reliability: thermal cycling of semiconductors, moisture sensitivity level (MSL) testing per J-STD-020
• Automotive component validation: climate endurance of ECUs, connectors, and sealants per ISO 16750-4
• Pharmaceutical packaging: accelerated aging studies per ICH Q1A(R2) and USP
• Polymer & composite testing: dimensional stability, hydrolysis resistance, and glass transition behavior
• Quality assurance in manufacturing: incoming material screening, batch release verification, and process capability analysis
• Research & development: formulation optimization for adhesives, coatings, and elastomers under variable RH conditions

FAQ

What temperature and humidity ranges does the YL-2236 support?
The standard configuration operates from −70 °C to +150 °C and 5 %RH to 98 %RH. Low-humidity variants achieving ≤5 %RH are available upon request.
Is the chamber suitable for continuous unattended operation?
Yes—its redundant safety architecture, automatic water replenishment, and fault-logging capability support 7×24 validation runs with minimal operator intervention.
Can multiple YL-2236 units be controlled from a single workstation?
Yes—RS-485 daisy-chaining enables centralized supervision of up to 32 chambers using Modbus RTU protocol.
Does the system comply with FDA 21 CFR Part 11 requirements?
The hardware supports Part 11 compliance when deployed with validated third-party software providing electronic signatures, audit trails, and role-based access control.
What maintenance is required for long-term reliability?
Scheduled servicing includes quarterly condenser coil cleaning, annual refrigerant leak inspection, biannual calibration verification of RTD sensors, and periodic replacement of humidifier wicks per operating hours log.