Yoyi GDW-400L High-Low Temperature and Humidity Cycling Chamber

Overview

The Yoyi GDW-400L High-Low Temperature and Humidity Cycling Chamber is an engineered environmental simulation system designed for rigorous reliability validation of materials, components, and finished products under dynamically varying thermal and hygrothermal stress conditions. It operates on a dual-loop control architecture—separate precision-regulated refrigeration and humidification subsystems—enabling stable, repeatable execution of temperature-humidity profiles including rapid ramping, dwell, cycling, and combined stress sequences. The chamber conforms to the physical principles defined in IEC 60068-2-30 (damp heat, cyclic) and IEC 60068-2-14 (change of temperature), supporting standardized test protocols used across electronics, automotive, aerospace, and lighting industries. Its 400 L working volume accommodates medium-scale assemblies—such as printed circuit board modules, LED luminaires, power converters, or polymer housings—while maintaining uniform climatic conditions across the entire test space per ISO 17025-compliant validation practices.

Key Features

• Triple-layer tempered glass observation window with integrated resistive defrosting and LED illumination—ensures optical clarity without condensation interference during low-temperature/high-humidity operation.
• Silicone-based door gasket engineered for structural resilience across −60°C to +150°C; resists hardening, cracking, and adhesion loss under prolonged thermal cycling.
• TEMI880 programmable controller with 100-segment profile capability, real-time trend logging, and auto-tuning PID algorithms—supports complex multi-step tests such as 85°C/85% RH soak, −40°C → +85°C ramp (5°C/min), or humidity cycling with temperature hold.
• Robust thermal management: high-efficiency hermetic compressor (R404A/R507 alternative refrigerants), nickel-chromium heating elements, and centrifugal forced-air circulation—achieving ≤±0.5°C temperature fluctuation and ≤±2°C spatial uniformity (empty chamber, 20°C ambient).
• Electro-galvanized cold-rolled steel exterior with epoxy powder coating; interior constructed from seamless 304 stainless steel with radius-rounded corners—facilitating cleaning, corrosion resistance, and long-term calibration stability.
• Standard left-side Ø50 mm test port with EPDM sealing cap; optional feedthroughs for thermocouple wiring, pressure lines, or data cables available upon request.

Sample Compatibility & Compliance

The GDW-400L supports testing of non-explosive, non-corrosive solid samples up to 35 kg total loading mass. Compatible specimen categories include PCBAs, semiconductor packages, OLED displays, elastomeric seals, conformal coatings, battery enclosures, and optical lenses. All operational parameters comply with internationally recognized environmental test standards—including ASTM D4332 (conditioning containers), ISO 6270-2 (condensation resistance), IEC 60068-2-30 (cyclic damp heat), and GB/T 2423.3–2016 / GB/T 2423.4–2016 (Chinese national equivalents). For GLP/GMP-regulated laboratories, optional audit-trail-enabled firmware (with user login, event logging, and electronic signature support) aligns with FDA 21 CFR Part 11 requirements when paired with validated software platforms.

Software & Data Management

The TEMI controller provides native USB and RS485 interfaces for bidirectional communication with Windows-based PC software (Yoyi LabControl Suite, included). This enables remote program upload/download, real-time parameter monitoring (temperature/humidity/time), alarm history export (CSV), and automated report generation—including test start/end timestamps, deviation alerts, and pass/fail status per user-defined acceptance criteria. Data integrity is preserved via non-volatile memory backup and timestamped event logs. Optional Ethernet module supports integration into centralized facility monitoring systems using Modbus TCP or MQTT protocols.

Applications

• Accelerated aging of polymeric materials under thermal-hygric stress to evaluate hydrolysis, plasticizer migration, or dimensional instability.
• Qualification testing of automotive ECUs per ISO 16750-4 (climate resistance) and AEC-Q200 stress screening.
• Validation of moisture barrier performance in medical device packaging per ISO 11607-1.
• Pre-conditioning of lithium-ion battery cells prior to electrical characterization per UN 38.3 Section 4.4.
• Environmental stress screening (ESS) of avionics hardware per MIL-STD-810H Method 507.6.
• Correlation studies between accelerated chamber cycles and field failure modes in outdoor-rated LED drivers.

FAQ

What temperature and humidity ranges are supported by the GDW-400L model?

The GDW-400L offers three configuration options: Type A (−20°C to +150°C), Type B (−40°C to +150°C), and Type C (−60°C to +150°C), all with concurrent humidity control from 20% to 98% RH.
Is the chamber suitable for continuous 24/7 operation in a quality control lab?

Yes—the system is rated for uninterrupted duty cycle, featuring redundant safety circuits, compressor discharge temperature monitoring, and automatic shutdown on overtemperature, overhumidity, or sensor fault detection.
Can the internal shelves be repositioned during operation?

Shelf positions are fixed during active testing; however, 12 adjustable stainless steel trays are supplied, allowing flexible load configuration during setup prior to test initiation.
Does the unit meet CE or UKCA marking requirements?

The GDW-400L complies with the essential health and safety requirements of the EU Machinery Directive 2006/42/EC and EMC Directive 2014/30/EU; CE documentation is provided with each shipment.
What calibration documentation is included?

Each unit ships with a factory calibration certificate traceable to NIM (National Institute of Metrology, China), covering temperature (−40°C, 25°C, 85°C) and humidity (35%, 65%, 90% RH) at three spatial locations within the working chamber.