Yuelian YL-2231 High-Low Temperature Alternating Environmental Test Chamber

Overview

The Yuelian YL-2231 High-Low Temperature Alternating Environmental Test Chamber is an engineered solution for accelerated environmental stress testing of materials, components, and finished products under controlled thermal extremes. Based on forced-air convection and precision PID-controlled heating/cooling loops, the chamber delivers reproducible temperature profiles across a wide operational range—from −70 °C to +150 °C—enabling compliance-driven validation per international standards including IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), and MIL-STD-810H Method 501.5 & 502.5. Its robust architecture supports both static temperature hold and dynamic cycling protocols, making it suitable for reliability screening in electronics, automotive, aerospace, and medical device manufacturing.

Key Features

• Programmable TFT-LCD controller with bilingual (English/Chinese) interface, supporting up to 5 user-defined test patterns, 50 programmable steps per pattern, and 999 total cycles—ideal for complex thermal profile replication.
• Dual-stage air-cooled refrigeration system for stable sub-zero operation down to −70 °C; single-stage configuration available for milder low-temperature requirements (≥ −20 °C), optimizing energy efficiency and maintenance intervals.
• Uniformity-enhancing airflow design with tangential fan circulation ensures ≤ ±1.5 °C temperature uniformity (per IEC 60068-3-5) across the working volume, verified using calibrated platinum resistance thermometers (Pt100 class A).
• Full SUS#304 stainless steel construction—interior chamber, insulation housing, and external casing—provides long-term corrosion resistance, cleanroom compatibility, and ease of decontamination.
• Integrated safety suite includes over-temperature cutoff, compressor high-pressure protection, over-current detection, and earth leakage circuit interruption—meeting IEC 61000-6-2 EMC immunity and IEC 61000-6-4 emission requirements.
• Standard equipment includes two load-bearing stainless steel shelves, a vacuum-rated double-glazed observation window with anti-fog heating element, and LED interior lighting for real-time visual monitoring without thermal disturbance.

Sample Compatibility & Compliance

The YL-2231 accommodates a broad spectrum of sample types—including PCB assemblies, polymer housings, lithium-ion battery cells, optical sensors, and sealed packaging—without requiring modification to chamber geometry or control logic. Internal dimensions span from 40 × 50 × 40 cm (80 L) to 100 × 100 × 80 cm (800 L), enabling scalability from R&D benchtop validation to full-system qualification. All models are designed and tested to meet ISO/IEC 17025 traceable calibration practices and support GLP/GMP audit readiness through configurable data logging (via optional RS-485 interface) and electronic record retention. The chamber’s thermal performance conforms to ASTM E145 Class II specifications for laboratory ovens and environmental chambers, ensuring metrological integrity across global regulatory submissions.

Software & Data Management

While the base unit operates via its embedded controller, optional RS-485 serial communication enables integration with third-party SCADA or LIMS platforms for centralized test orchestration and data archival. Logged parameters—including chamber setpoint, actual temperature, cycle count, and alarm status—are timestamped and exportable in CSV format. For laboratories subject to FDA 21 CFR Part 11 requirements, validated software extensions (available separately) provide electronic signatures, audit trails, and role-based access control—ensuring data integrity throughout the product lifecycle assessment process.

Applications

• Thermal cycling fatigue evaluation of solder joints and interconnects in avionics and automotive ECUs.
• Low-temperature brittleness testing of elastomers, adhesives, and thermoplastic enclosures per ISO 22088-2.
• Pre-conditioning of lithium-based batteries prior to electrical performance characterization at extreme ambient conditions.
• Validation of hermetic seal integrity in medical device packaging under rapid thermal transients.
• Stress screening of optical coatings and MEMS components exposed to diurnal temperature variation profiles.
• Material aging studies for aerospace composites under combined high-heat soak and cryogenic recovery sequences.

FAQ

What temperature uniformity can be expected across the working volume?
Typical uniformity is ≤ ±1.5 °C at steady state, measured at nine designated points per IEC 60068-3-5. Uniformity is validated during factory acceptance testing and documented in the calibration certificate.
Is the chamber compatible with humidity control modules?
The YL-2231 is configured as a dry-thermal-only chamber. Humidity-integrated variants (e.g., YL-2231H) are available as custom-engineered solutions—contact technical sales for specification alignment.
Can test data be exported for regulatory submission?
Yes—via RS-232 or optional RS-485, real-time temperature logs with timestamps can be captured externally. For 21 CFR Part 11 compliance, validated PC-based acquisition software with audit trail functionality is offered as an add-on.
What maintenance intervals are recommended for the refrigeration system?
Compressor oil and refrigerant levels should be inspected annually; filter-driers replaced every 24 months. Preventive maintenance kits and certified technician support are available through Yuelian’s authorized service network in APAC and EU regions.
Does the chamber support ramp-soak cycling with variable rates?
Yes—the controller allows independent definition of ramp rates (°C/min) and dwell durations per step, with linear interpolation between setpoints. Maximum programmable ramp rate is limited by physical thermal mass and system capacity, not firmware constraints.