Yuelian TS Series Temperature and Humidity Controlled Environmental Test Chamber

Overview

The Yuelian TS Series Temperature and Humidity Controlled Environmental Test Chamber is an engineered solution for precise, repeatable simulation of climatic stress conditions in laboratory and industrial quality assurance environments. Based on the fundamental principles of thermodynamic equilibrium and psychrometric control, the chamber maintains tightly regulated temperature and relative humidity profiles across its working volume using dual-mode refrigeration architecture (single-stage for ≥−20 °C operation; cascade two-stage for ≤−40 °C), surface-evaporation humidification, and intelligent PID-driven feedback loops. It supports standardized environmental conditioning per ASTM D4332 (conditioning of plastics), ISO 6270-2 (humidity testing of coatings), IEC 60068-2-30 (damp heat cyclic testing), and MIL-STD-810G Method 507.5 — enabling rigorous evaluation of material integrity, dimensional stability, electrical performance, and long-term reliability under defined thermal and hygroscopic loads.

Key Features

• Robust dual-stage refrigeration system featuring hermetically sealed air-cooled compressors (Tecumseh-sourced), optimized for low-temperature stability and refrigerant efficiency using R404A/R507 — compliant with global ozone-depletion and global-warming potential (GWP) regulations.
• High-fidelity climate control architecture integrating PID + SSR/SCR bidirectional power output with adaptive slope logic, enabling smooth transitions between setpoints and minimizing overshoot during rapid thermal ramping.
• Programmable logic controller supporting up to 150 multi-step test programs (1500 total segments), with segment linking, partial cycle segmentation (5 independent sub-cycles), and 9999 × 999 cycle nesting for complex durability and accelerated aging protocols.
• Stainless steel (SUS#304) construction throughout interior and exterior surfaces, combined with high-density rock wool and rigid polyurethane foam insulation (≥100 mm thickness), ensuring thermal integrity and corrosion resistance in high-humidity or saline environments.
• Triple-layer safety architecture: 15-point real-time diagnostics (including compressor overload, refrigerant pressure anomalies, heater overtemperature, water shortage, and door interlock failure), automatic fault logging with timestamped event codes, and configurable alarm outputs for integration into facility SCADA systems.
• Ergonomic design elements including anti-fog double-glazed observation window with integrated heating element and high-lumen fluorescent lighting, adjustable stainless steel shelves, rear-mounted test ports (φ50 mm standard), and castor-mounted base for flexible lab reconfiguration.

Sample Compatibility & Compliance

The TS Series accommodates a broad range of sample geometries and material classes — from printed circuit boards and automotive ECUs to pharmaceutical packaging, polymer films, aerospace composites, and medical device housings. Its uniformity specifications (±0.5 °C temperature, ±3 % RH humidity) meet Class II requirements per IEC 60068-3-5 for climatic test chambers. The chamber’s design facilitates compliance with GLP/GMP documentation workflows through optional RS-232/RS-485 interfaces supporting 21 CFR Part 11–compliant audit trails when paired with validated third-party data acquisition software. All models are constructed and calibrated in accordance with ISO/IEC 17025 traceable procedures at the manufacturer’s Guangdong-based calibration laboratory.

Software & Data Management

The embedded controller provides local program editing, real-time trend display, and event-triggered data capture. Standard RS-232 serial interface enables direct connection to Windows-based PCs running Yuelian’s proprietary LabView-compatible monitoring suite (optional), which logs temperature/humidity values at user-defined intervals (1 s to 60 min), generates time-stamped CSV reports, and supports comparative overlay of multiple test runs. For enterprise integration, optional Ethernet-enabled controllers support Modbus TCP and OPC UA protocols, allowing seamless ingestion into LIMS, MES, or cloud-based QA platforms. All data exports include metadata fields for operator ID, chamber ID, program name, start/stop timestamps, and calibration certificate reference numbers.

Applications

• Electronics: Thermal cycling and damp heat testing of PCBAs per JEDEC JESD22-A104 and A110B to assess solder joint fatigue and moisture-induced failure mechanisms.
• Automotive: Validation of infotainment modules, battery management systems, and ADAS sensors under combined thermal/humidity stress per ISO 16750-4.
• Pharmaceuticals: Stability testing of primary and secondary packaging per ICH Q1A(R2), including long-term and accelerated conditions (e.g., 40 °C/75 % RH).
• Aerospace: Environmental qualification of avionics enclosures and composite structural components per RTCA DO-160 Section 4 (temperature) and Section 8 (humidity).
• Materials Science: Investigation of hygrothermal expansion coefficients, moisture diffusion kinetics in polymers, and phase-change behavior in phase-change materials (PCMs).
• Quality Assurance: In-process verification of coating adhesion, seal integrity, and mechanical fastener torque retention after environmental exposure.

FAQ

What temperature and humidity ranges are achievable with the TS Series?
Standard models operate from −70 °C to +150 °C and 20–98 % RH. Optional low-humidity configurations extend the lower limit to 5 % RH using auxiliary desiccant drying modules.
Is the chamber suitable for continuous unattended operation?
Yes — all TS models include redundant safety circuits, automatic water recovery for humidification, and self-diagnostic firmware that halts operation and alerts users upon detection of critical faults such as refrigerant loss or heater runaway.
Can test data be exported in formats compatible with regulatory submissions?
Raw sensor data (timestamped T/RH values) is exportable as CSV or Excel via USB or serial link. When used with validated software packages, full 21 CFR Part 11 audit trails — including electronic signatures, change history, and user access logs — are supported.
How is calibration maintained over time?
Each unit ships with a factory calibration certificate traceable to NIM (China National Institute of Metrology). Optional annual recalibration services include on-site verification using NIST-traceable dry-well calibrators and chilled mirror hygrometers, with updated certificates issued per ISO/IEC 17025.
Are custom modifications available for specialized test standards?
Yes — Yuelian offers engineering consultation for bespoke configurations including extended test ports, internal load banks, purge gas inlets (N₂ or dry air), and integration with external vibration shakers or solar simulators for combined environmental stress screening (CESS).