Yuelian YL-2231 Programmable High-Low Temperature Environmental Test Chamber
| Brand | Yuelian |
|---|---|
| Origin | Guangdong, China |
| Model | YL-2231 |
| Temperature Range | −70 °C to +150 °C |
| Internal Volume | 80–800 L (5 standard configurations) |
| Heating Rate | ~20 min (0 °C to 100 °C) |
| Cooling Rate | ~90 min (20 °C to −70 °C) |
| Control System | TFT-LCD touchscreen controller with RS-232 interface, 5 programs / 50 steps / 999 cycles |
| Construction | Full SUS#304 stainless steel interior and exterior |
| Cooling Configuration | Single-stage air-cooled refrigeration system (≥ −20 °C), dual-stage air-cooled refrigeration system (< −20 °C) |
| Safety Protections | Over-temperature, compressor overload, over-current, earth leakage |
| Standard Accessories | Two adjustable stainless steel shelves, vacuum-view window, interior LED lighting, anti-fog heater |
| Optional | RS-485 communication module for PC-based monitoring |
Overview
The Yuelian YL-2231 Programmable High-Low Temperature Environmental Test Chamber is an engineered solution for precise, repeatable thermal stress evaluation of materials, components, and finished products under controlled ambient conditions. Based on forced-air convection thermoregulation, the chamber utilizes a high-stability platinum resistance temperature sensor (PT100 class A) coupled with a microprocessor-driven PID control algorithm to maintain uniform thermal distribution across the test volume—critical for compliance with ASTM D3418, ISO 11357, IEC 60068-2-1 (cold), and IEC 60068-2-2 (dry heat) test standards. Its operational range spans from −70 °C to +150 °C, supporting both static temperature hold and dynamic thermal cycling protocols essential for reliability screening in electronics, automotive, aerospace, and polymer R&D laboratories.
Key Features
- Full stainless steel construction (SUS#304) for corrosion resistance, cleanroom compatibility, and long-term dimensional stability
- Dual-stage air-cooled refrigeration system enables stable sub-zero operation down to −70 °C without liquid nitrogen or external chillers
- High-efficiency axial fan array with adjustable airflow baffle ensures ±0.5 °C temperature uniformity (per IEC 60068-3-5) across the working volume
- TFT-LCD touchscreen controller with bilingual (English/Chinese) UI, real-time graphing, and programmable profiles: up to 5 independent patterns, 50 programmable steps per pattern, and 999 total cycles
- Integrated safety architecture including over-temperature cutoff, compressor high-pressure protection, earth leakage detection, and phase-loss monitoring
- Standard vacuum-rated observation window with anti-fog heating element for continuous visual monitoring without thermal disturbance
Sample Compatibility & Compliance
The YL-2231 accommodates diverse sample geometries—from PCB assemblies and battery cells to molded elastomers and optical lenses—across five internal volume options (80 L to 800 L). Interior dimensions are optimized to minimize dead space while maximizing usable load capacity. All models meet electromagnetic compatibility (EMC) requirements per EN 61326-1 and electrical safety standards per EN 61010-1. The chamber’s thermal performance is validated per ISO/IEC 17025-accredited procedures and supports audit-ready documentation for GLP and GMP environments. Optional RS-485 interface enables integration into centralized lab management systems compliant with FDA 21 CFR Part 11 for electronic record integrity.
Software & Data Management
The embedded controller logs timestamped temperature data at user-selectable intervals (1–600 seconds) and stores up to 30 days of continuous records internally. Data export is supported via RS-232 serial output in CSV format for traceable post-processing in MATLAB, Excel, or LIMS platforms. While no proprietary PC software is bundled, the open ASCII protocol allows seamless integration with third-party SCADA or MES systems using standard Modbus RTU or custom Python/Node-RED scripts. Audit trail functionality—including operator ID tagging, parameter change logging, and session start/stop timestamps—is available when paired with external authentication middleware.
Applications
- Thermal shock qualification of semiconductor packages per JESD22-A104
- Accelerated aging of lithium-ion batteries under cyclic low-temperature charge/discharge conditions
- Dimensional stability testing of precision machined parts per ASME B89.1.10M
- Validation of adhesive bond strength retention after repeated freeze-thaw exposure (ASTM D2572)
- Environmental stress screening (ESS) of avionics modules prior to HALT/HASS
- Material glass transition characterization (Tg) via controlled ramp-and-hold protocols
FAQ
What is the maximum thermal ramp rate achievable across the full temperature range?
The chamber achieves a nominal heating rate of ~3.0 °C/min (0 °C to 100 °C) and cooling rate of ~0.8 °C/min (20 °C to −70 °C), subject to load mass and thermal inertia. Rates are not linear across extremes and decrease near specification limits.
Is the controller compatible with industry-standard validation protocols such as IQ/OQ/PQ?
Yes—the controller supports calibration certificate traceability to NIST or CNAS-accredited labs, and its deterministic response time, repeatability (< ±0.3 °C over 24 h), and data logging fidelity meet foundational requirements for installation, operational, and performance qualification.
Can the chamber operate continuously at −70 °C for extended durations?
Yes—dual-stage refrigeration and insulated double-wall construction enable uninterrupted operation at −70 °C for >168 hours, provided ambient room temperature remains ≤25 °C and relative humidity <70% RH.
Are custom internal fixtures or mounting brackets available?
Yuelian offers OEM mechanical integration support, including laser-cut shelf modifications, cable port adapters, and non-magnetic interior hardware—subject to minimum order quantity and engineering review.
Does the unit include factory calibration documentation?
Each shipment includes a signed temperature uniformity and stability report (per IEC 60068-3-5), PT100 sensor calibration certificate (traceable to national standards), and electrical safety test record.
