Yuelian TS Series Dual 85 Environmental Test Chamber for Photovoltaic Module Reliability Testing

Overview

The Yuelian TS Series Dual 85 Environmental Test Chamber is a precision-engineered climatic stress testing system specifically designed to evaluate the long-term reliability of photovoltaic (PV) modules under accelerated aging conditions defined by IEC 61215, IEC 61730, and UL 1703 standards. The “Dual 85” test protocol—85 °C temperature and 85 % relative humidity (RH) sustained for up to 1,000–2,000 hours—simulates extreme tropical or high-humidity operational environments to assess moisture ingress, delamination, corrosion of metallization, encapsulant discoloration, and electrical insulation degradation. This chamber employs a dual-stage refrigeration architecture (single-stage for operation down to –20 °C; cascade two-stage for –40 °C and –70 °C variants), coupled with surface-evaporation humidification and intelligent PID-based temperature/humidity coupling control, ensuring thermodynamic stability and spatial uniformity critical for reproducible qualification testing in PV manufacturing QA labs and independent certification facilities.

Key Features

• Robust stainless-steel construction: Interior and exterior housing fabricated from SUS#304 stainless steel with high-density polyurethane (PU) foam and rock wool composite insulation for thermal integrity and corrosion resistance.
• High-visibility observation window: Double-layer tempered glass viewport with anti-fog electric heater and integrated high-luminance fluorescent lighting—enabling real-time visual inspection without compromising chamber integrity.
• Intelligent climate control system: Advanced PID + SSR/SCR bidirectional output controller with slope logic, supporting up to 150 programmable profiles × 1500 segments per profile, 9999 cycles with nested sub-cycle segmentation, and 3 independent time-sequence output interfaces for synchronized external actuator control.
• Automated water management: Built-in deionized water generator fed directly from municipal supply; auto-recovery humidifier reservoir with low-water cutoff and overheat protection.
• Energy-efficient refrigeration: Hermetically sealed French Tecumseh (Taylor) compressors; eco-friendly refrigerants R404A and R507; optimized oil return design for extended compressor life and stable low-temperature performance.
• Comprehensive safety monitoring: 15-point real-time fault detection—including refrigerant pressure anomalies, heater overtemperature, sensor failure, door interlock breach, and power interruption—with automatic event logging (timestamp, fault code, recommended remediation).

Sample Compatibility & Compliance

The TS Series accommodates standard PV module formats (up to 100 cm × 100 cm × 100 cm internal volume in the TS-1000 model) and supports mounting fixtures for tilt-angle testing per IEC 61215-2 MQT 11. Its temperature range (–70 °C to +150 °C) and humidity range (5–98 % RH, optional low-humidity configuration) enable full-spectrum environmental stress screening beyond Dual 85—including thermal cycling (TC), damp heat (DH), and humidity freeze (HF) sequences. The chamber meets structural and operational requirements for ISO/IEC 17025-accredited laboratories and supports audit-ready documentation for GLP/GMP compliance. Temperature uniformity (±0.5 °C) and humidity uniformity (±3 % RH) across the working volume are verified per IEC 60068-3-5 and ASTM E145, ensuring data traceability and inter-laboratory comparability.

Software & Data Management

Equipped with RS-232 serial interface as standard—and optional RS-485 or Ethernet connectivity—the TS Series integrates seamlessly with laboratory information management systems (LIMS) and centralized test orchestration platforms. Controller firmware includes built-in data logging at user-defined intervals (minimum 1 s), with timestamped CSV export capability. Multi-PID tuning parameters are configurable per test segment to optimize transient response during ramp-and-soak phases. All program edits, setpoint changes, and alarm events are recorded with immutable timestamps—supporting FDA 21 CFR Part 11-compliant electronic records when deployed with validated third-party software. Optional analog output channels allow direct connection to strip-chart recorders or SCADA systems for continuous analog backup.

Applications

• Photovoltaic module qualification per IEC 61215-2 (MQT 09 Damp Heat, MQT 10 Humidity Freeze, MQT 11 UV Preconditioning)
• Encapsulant and backsheet material aging studies (EVA, POE, PET, fluoropolymer films)
• Interconnect ribbon corrosion resistance evaluation under cyclic humidity exposure
• Electrical insulation resistance (IR) and wet leakage current (WLC) preconditioning
• Automotive electronics and battery pack environmental validation (per AEC-Q200, ISO 16750-4)
• Medical device packaging integrity testing (ASTM F1980 accelerated aging)
• Plastic and polymer dimensional stability assessment under hygrothermal stress

FAQ

What standards does the TS Series support for PV module testing?

It fully supports IEC 61215-2, IEC 61730-2, UL 1703, and JIS C 8910 for damp heat, thermal cycling, and humidity freeze protocols.

Can the chamber maintain 85 °C / 85 % RH continuously for 2,000 hours?

Yes—its dual-stage refrigeration, high-capacity humidification, and redundant safety systems are engineered for uninterrupted long-duration Dual 85 operation.

Is remote monitoring and control possible?

Standard RS-232 enables local PC-based supervision; optional Ethernet modules support TCP/IP integration with enterprise MES or cloud-based test dashboards.

What maintenance is required for sustained accuracy?

Quarterly calibration of PT100 sensors and humidity transmitters using NIST-traceable references is recommended; annual refrigerant charge verification and condensate drain line inspection are advised.

Does the system include validation documentation for GxP environments?

Factory-installed IQ/OQ documentation packages are available upon request, including temperature/humidity mapping reports, alarm response verification, and sensor calibration certificates.