Yuelian YL-2236 Programmable Environmental Test Chamber
| Brand | Yuelian |
|---|---|
| Origin | Guangdong, China |
| Model | YL-2236 |
| Temperature Range | −70 °C to 150 °C |
| Humidity Range | 5–98 %RH (customizable low-humidity option) |
| Temperature Uniformity | ±0.5 °C |
| Humidity Uniformity | ±3 %RH |
| Temperature Stability | ±0.3 °C |
| Humidity Stability | ±2.5 %RH |
| Heating Rate | −70 °C → 100 °C in ≈60 min |
| Cooling Rate | 20 °C → −70 °C in ≈90 min |
| Internal Volume Options | 80–1000 L |
| Refrigeration System | Single-stage air-cooled below −20 °C |
| Control Interface | LCD touch screen with bilingual (EN/CN) UI, 120 programs × 1200 segments, 999-cycle nesting |
| Compliance | GB/T 2423, ISO 16750, ASTM D4332, IEC 60068-2, UL 1598, EN 60068 |
Overview
The Yuelian YL-2236 Programmable Environmental Test Chamber is an engineered solution for accelerated environmental stress testing of materials and components under precisely controlled temperature and humidity profiles. Based on the principle of balanced temperature and humidity regulation—where independent heating, refrigeration, humidification, and dehumidification subsystems operate in dynamic equilibrium—the chamber delivers high-fidelity simulation of real-world climatic exposure conditions. It supports both steady-state and dynamic thermal/hygrometric cycling, including rapid temperature transitions (up to 10 °C/min in select configurations), making it suitable for qualification testing per international reliability standards such as IEC 60068-2-1 (cold), -2 (dry heat), -14 (temperature change), and -30 (damp heat cyclic). The chamber’s structural integrity, thermal mass management, and airflow uniformity are optimized to minimize spatial gradients and ensure reproducible test outcomes across repeated runs.
Key Features
- Robust stainless-steel construction: Entire inner and outer chamber fabricated from SUS#304 stainless steel, resistant to corrosion and condensation-induced degradation.
- Advanced dual-mode refrigeration architecture: Single-stage hermetic air-cooled system for operation above −20 °C; binary-stage air-cooled system with R404A/R507 mixed refrigerant for stable sub-zero performance down to −70 °C.
- Surface-evaporation humidification system with integrated safeguards: Includes dry-run protection, overheat cutoff, and auto-refill via built-in pure-water generator fed directly from municipal supply—eliminating manual water replenishment.
- Intelligent PID + SSR/SCR bidirectional control logic: Enables precise ramp-soak profiling, slope-based rate limiting, and multi-segment program nesting with seamless transition between temperature and humidity setpoints.
- High-visibility observation window: Double-layer heated anti-fog glass with embedded resistive heater and LED illumination, maintaining optical clarity during high-humidity or sub-zero cycles.
- Comprehensive safety monitoring: 15-point fault detection covering compressor overload, refrigerant pressure anomalies, chamber over-temperature, heater dry-fire, power failure, and door interlock status—with timestamped event logging and diagnostic guidance.
Sample Compatibility & Compliance
The YL-2236 accommodates a broad range of sample geometries and thermal masses through six standard internal volume configurations (80 L to 1000 L), all featuring adjustable stainless-steel shelves and standardized cable ports. Its airflow design ensures uniform exposure even for stacked or densely packed specimens. The chamber complies with key regulatory and industry test standards including GB/T 2423 (China National Standard), ISO 16750-4 (road vehicles), ASTM D4332 (conditioning of plastics), IEC 60068-2 (environmental testing procedures), UL 1598 (luminaire safety), and EN 60068-2-30 (damp heat, cyclic). Optional validation packages support IQ/OQ documentation for GLP and GMP environments, and the controller’s RS-232 interface enables traceable data export for FDA 21 CFR Part 11–aligned audit trails when paired with compliant software.
Software & Data Management
The embedded controller features a 7-inch color LCD touchscreen with intuitive bilingual (English/Chinese) navigation and password-protected parameter access levels. It supports up to 120 independent test programs, each containing up to 1200 programmable segments—including ramp, soak, loop, and jump commands. Users may define nested cycles (e.g., 999 full cycles, each subdivided into five independently triggered partial sequences), assign time-scheduled outputs (three TTL-compatible relay interfaces supporting 10 timing modes), and configure multi-PID tuning zones for improved transient response. Real-time trend graphs display temperature/humidity deviation against setpoint, while onboard memory retains historical run logs with timestamps, fault codes, and operator IDs. Data export via RS-232 allows integration with LabVIEW, MATLAB, or enterprise MES/QMS platforms for centralized reporting and statistical process control (SPC).
Applications
This chamber serves critical roles in product development, quality assurance, and regulatory compliance across multiple sectors. In electronics manufacturing, it validates solder joint integrity, conformal coating performance, and PCB warpage under thermal cycling. Automotive suppliers use it for component aging per ISO 16750-4, evaluating connectors, sensors, and infotainment modules under combined thermal-hygric stress. Packaging engineers assess seal strength, barrier film permeability, and label adhesion across humidity gradients. Aerospace subcontractors perform preconditioning prior to vibration or altitude testing. Additionally, it supports material characterization workflows—including polymer crystallinity studies, adhesive cure kinetics, and corrosion resistance evaluation of coated metals—under rigorously defined environmental boundary conditions.
FAQ
What temperature and humidity ranges does the YL-2236 support?
The standard operating range spans −70 °C to 150 °C and 5–98 %RH, with low-humidity variants configurable down to 5 %RH upon request.
Is the chamber suitable for HALT or HASS testing?
While not rated for extreme rapid thermal transients (>15 °C/min) typical of dedicated HALT systems, its programmable ramp rates (up to 10 °C/min in larger models) and robust control stability make it appropriate for moderate-acceleration reliability screening and pre-compliance environmental stress screening.
How is calibration and traceability handled?
The chamber integrates PT100 platinum resistance thermometers and capacitive RH sensors, both field-replaceable and compatible with external NIST-traceable calibrators. Full calibration certificates and uncertainty budgets are available as optional deliverables.
Can the system be integrated into an automated test lab?
Yes—via RS-232 serial interface with ASCII command protocol, enabling remote start/stop, setpoint modification, and real-time data polling. Modbus TCP and Ethernet/IP gateways are supported through third-party adapters.
What maintenance intervals are recommended?
Compressor oil inspection every 12 months; refrigerant leak check annually; humidifier tank cleaning every 3 months; air filter replacement quarterly; full preventive maintenance (including sensor verification and PID recalibration) biannually.
