Yuelian HL Series High-Low Temperature Environmental Test Chamber
| Brand | Yuelian |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Authorized Distributor |
| Country of Manufacture | China |
| Model | HL Series |
| Pricing | Available Upon Request |
| Internal Dimensions (W×H×D, cm) | HL-A: 40×50×40 |
| HL-B | 50×60×50 |
| HL-C | 60×75×60 |
| HL-D | 60×85×80 |
| HL-E | 100×100×80 |
| HL-F | 100×100×100 |
| External Dimensions (W×H×D, cm) | HL-A: 110×136×71 |
| HL-B | 117×146×85 |
| HL-C | 130×166×91 |
| HL-D | 140×176×101 |
| HL-E | 170×186×111 |
| HL-F | 180×196×123 |
| Temperature Range | −70 °C to +150 °C (selectable standard setpoints: 0 °C, −20 °C, −40 °C, −60 °C, −70 °C) |
| Temperature Display Resolution | ±0.1 °C |
| Heating Rate | Approx. 3 °C/min |
| Cooling Rate | Approx. 1 °C/min |
| Construction Material | Full SUS304 stainless steel (matte finish) |
| Insulation | High-density polyisocyanurate foam with high-temperature resistance |
| Refrigeration System | Air-cooled, dual-stage cascade refrigeration with French Tecumseh compressors |
| Refrigerants | R-404A (low-temp stage), R-23 (ultra-low-temp stage) |
| Controller | Imported LCD touchscreen interface with real-time display of setpoint/actual value/time |
| Safety Protections | Fuseless circuit breaker, compressor overload protection, refrigerant high/low pressure switches, over-temperature/over-humidity cut-off, fault diagnostic alarm system |
| Standard Accessories | Double-layer heated observation window with anti-fog heater, internal PL fluorescent lighting, 50 mm diameter test port, adjustable stainless steel shelves, built-in casters with locking mechanism |
| Power Supply | Single-phase 220 VAC ±10%, 50/60 Hz or three-phase 380–415 VAC ±10%, 50/60 Hz |
Overview
The Yuelian HL Series High-Low Temperature Environmental Test Chamber is an engineered solution for accelerated environmental stress screening (ESS) and reliability validation of industrial components and materials under controlled thermal extremes. Designed in strict compliance with international environmental testing standards—including IEC 60068-2-1 (Cold), IEC 60068-2-2 (Dry Heat), MIL-STD-810G Method 502.5, and GJB 150.3A/150.4A—the chamber delivers precise, repeatable, and traceable thermal conditioning across a wide operational range from −70 °C to +150 °C. Its dual-stage cascade refrigeration architecture, utilizing environmentally compliant refrigerants (R-404A and R-23), ensures stable ultra-low temperature performance without oil carryover or thermal lag. The chamber’s structural integrity, thermal efficiency, and controller responsiveness are validated against GB/T 10592–2008 (formerly GB 10592-89), confirming conformity with national technical specifications for environmental test equipment.
Key Features
- Full SUS304 stainless steel construction with matte surface treatment—resistant to corrosion, cleaning agents, and long-term thermal cycling.
- Aerodynamically optimized interior geometry with uniform airflow distribution, verified by thermal mapping per ISO/IEC 17025-compliant validation protocols.
- Heated double-glazed observation window with integrated anti-fog heater and high-luminance PL fluorescent lighting—enabling real-time visual monitoring without condensation interference.
- Programmable LCD controller supporting up to 99 segments, with user-defined ramp rates (slope control), dwell times, and cyclic profiles—fully compatible with ASTM E1512 data logging requirements.
- Modular shelf system with height-adjustable stainless steel trays and reinforced load-bearing capacity (up to 30 kg per shelf, depending on model).
- Integrated 50 mm test port with silicone gasket seal—designed for feedthrough of power cables, sensor leads, or pneumatic lines without compromising chamber integrity.
- Self-diagnostic safety architecture featuring redundant thermal cutoffs, refrigerant pressure monitoring, and real-time fault code reporting via controller interface.
Sample Compatibility & Compliance
The HL Series accommodates diverse sample geometries—from PCB assemblies and automotive ECUs to aerospace fasteners and polymer specimens—within standardized internal volumes (40 L to 1000 L). Its temperature uniformity (±1.5 °C at 1/6 volume, per IEC 60068-3-5) and stability (±0.5 °C over 2 hours) meet the stringent spatial and temporal criteria required for qualification testing under ISO 9001, IATF 16949, and AS9100 quality management systems. All models undergo factory calibration traceable to NIM (National Institute of Metrology, China) and support third-party verification per ISO/IEC 17025. Documentation packages include as-built drawings, refrigerant charge records, and electrical safety test reports (IEC 61010-1).
Software & Data Management
While the base controller provides local operation and profile storage, optional Ethernet-enabled data acquisition modules enable seamless integration into enterprise laboratory information management systems (LIMS) or MES platforms. Raw temperature/time logs are exportable in CSV format with timestamps synchronized to UTC. For regulated environments, optional 21 CFR Part 11-compliant software add-ons provide electronic signatures, audit trails, role-based access control, and secure data archiving—supporting GLP and GMP compliance in pharmaceutical, medical device, and defense applications.
Applications
- Temperature cycling tests per JEDEC JESD22-A104 for semiconductor packaging reliability assessment.
- Thermal shock pre-conditioning prior to HALT/HASS protocols in electronics manufacturing.
- Material coefficient of thermal expansion (CTE) evaluation using dimensional metrology during controlled ramp sequences.
- Validation of battery thermal management systems (BTMS) under extreme ambient conditions (−40 °C cold soak, +85 °C discharge simulation).
- Environmental stress screening of avionics enclosures per DO-160 Section 4 (Temperature Variation).
- Accelerated aging studies of elastomers, adhesives, and conformal coatings per ASTM D573 and ISO 188.
FAQ
What standards does the HL Series chamber comply with?
The chamber meets GB/T 10592–2008, GB/T 2423.1–2023 (cold), GB/T 2423.2–2023 (dry heat), IEC 60068-2-1/2, MIL-STD-810G Method 502.5/503.5, GJB 150.3A/150.4A, and supports validation per ISO/IEC 17025.
Is ultra-low temperature operation (−70 °C) achievable with standard configuration?
Yes—models equipped with the dual-stage cascade refrigeration system and R-23 refrigerant achieve and maintain −70 °C without auxiliary chillers or liquid nitrogen supplementation.
Can the chamber be integrated into automated test sequences?
Via optional RS485/Modbus RTU or Ethernet TCP/IP interfaces, the controller supports remote start/stop, setpoint adjustment, and real-time data polling for integration with SCADA or custom test orchestration software.
What maintenance intervals are recommended for the refrigeration system?
Compressor oil analysis and refrigerant purity checks are advised every 24 months; condenser coil cleaning every 6 months in non-cleanroom environments; annual verification of temperature sensors and safety interlocks.
Are calibration certificates provided with shipment?
Each unit ships with a factory calibration report (traceable to NIM) covering temperature uniformity, stability, and controller accuracy at three reference points (−40 °C, 25 °C, +85 °C); UKAS-accredited calibration is available as an add-on service.
