Yoyi GDW-150L High-Low Temperature Alternating Environmental Test Chamber

Overview

The Yoyi GDW-150L High-Low Temperature Alternating Environmental Test Chamber is an engineered platform for precise simulation of dynamic thermal and hygrothermal stress conditions across industrial R&D, quality assurance, and regulatory validation environments. Based on forced-air convection architecture with dual-mode heating (nickel-chromium alloy resistive elements) and vapor-compression refrigeration (hermetic scroll compressors with R404A or R507 alternatives), the chamber delivers reproducible temperature transitions between –60℃ and +150℃, with optional humidity control spanning 20–98% RH. Its operational principle relies on closed-loop feedback regulation via a TEMI-series microprocessor controller employing adaptive PID algorithms, enabling stable setpoint maintenance under variable load and ambient conditions. The system is purpose-built for accelerated life testing, environmental stress screening (ESS), and qualification per international standards governing electronic components, automotive modules, medical devices, and polymer-based materials.

Key Features

• Triple-tier temperature capability: Configurable variants support –20℃, –40℃, or –60℃ minimum operating temperatures — all extending to +150℃ — facilitating compliance with MIL-STD-810G, JEDEC JESD22-A104, and IEC 60068-2-14 thermal shock profiles.
• High-fidelity humidity control: Integrated steam generator and dehumidification circuitry maintain ±3–5% RH accuracy across 20–98% range, validated under no-load, 20℃/50% RH ambient reference conditions.
• Robust thermal uniformity: Optimized air distribution via centrifugal fan array and internal baffle geometry ensures ±2℃ spatial consistency within the 500×500×600 mm stainless-steel 304 working chamber.
• Intuitive human-machine interface: 7-inch color touchscreen with multilingual support provides real-time trend logging, alarm history, and seamless navigation through 100-segment programmable cycles — including ramp-soak-step sequences and multi-loop profiles.
• Structural integrity and safety: Cold-rolled steel exterior with electrostatic epoxy coating; triple-glazed observation window with electric defrost and LED illumination; silicone door gasket rated for continuous operation from –70℃ to +180℃ without hardening or adhesion loss.
• Comprehensive protection suite: Independent overtemperature cutoff, compressor high-pressure shutdown, phase failure detection, and timed auto-power-off function — all compliant with IEC 61000-4 electromagnetic compatibility requirements.

Sample Compatibility & Compliance

The GDW-150L accommodates diverse sample geometries up to 350 mm in height and 400 mm in footprint, supported by freely adjustable 304 stainless steel shelves (2 standard + up to 6 optional). Its chamber design permits direct integration of external instrumentation via a standardized 50 mm left-side test port (sealable with silicone plug). The unit meets mechanical and electrical safety requirements per UL 61010-1 and GB 4793.1. For regulated industries, its controller supports audit-trail-enabled operation (user login, parameter change logs, cycle execution timestamps) aligned with FDA 21 CFR Part 11 data integrity expectations when paired with validated software interfaces. Routine calibration traceability follows ISO/IEC 17025 guidelines using NIST-traceable reference sensors.

Software & Data Management

Standard RS485 Modbus RTU and optional USB host interfaces enable bidirectional communication with PC-based monitoring platforms. Yoyi’s optional TestMaster Pro software (Windows-compatible) allows remote program creation, real-time graphing of up to four concurrent parameters (T, RH, ramp rate, elapsed time), automatic report generation in PDF/CSV formats, and secure user-role assignment (operator, engineer, administrator). All logged data include embedded metadata: timestamp (ISO 8601), chamber ID, operator ID, and environmental context tags — supporting GLP/GMP documentation requirements. Firmware updates are performed via USB stick with cryptographic signature verification to ensure system integrity.

Applications

• Electronics reliability testing: Thermal cycling of PCBAs, connectors, and semiconductor packages per IPC-9701 and JEDEC J-STD-020.
• Automotive component validation: Under-hood module endurance under combined low-temperature start-up and high-temperature soak conditions per SAE J2223.
• Pharmaceutical packaging stability: Accelerated aging of blister packs and HDPE containers per ICH Q1A(R2) guidance.
• Polymer and composite material characterization: Glass transition mapping, coefficient of thermal expansion (CTE) assessment, and moisture diffusion coefficient determination.
• LED lighting qualification: Lumen maintenance and color shift evaluation under cyclic damp heat per IES LM-80 and TM-21 protocols.
• Quality control laboratories: In-process verification of solder paste reflow profiles, battery cell thermal runaway thresholds, and sensor drift behavior.

FAQ

What is the standard warranty period for the GDW-150L series?
Yoyi provides a 24-month parts-and-labor warranty covering manufacturing defects, inclusive of compressor and controller electronics — extendable to 36 months with annual preventive maintenance contracts.
Can the chamber operate continuously at –60℃ with 20% RH?
Yes — the B and C variants are fully rated for simultaneous extreme low-temperature and low-humidity operation, verified per ISO 16750-4 cold/humidity combined stress protocols.
Is third-party calibration certification available?
Calibration certificates issued by CNAS-accredited labs (traceable to NIM, China) are available upon request, including as-found/as-left data and uncertainty budgets per ISO/IEC 17025 Annex A.3.
Does the system support custom test profile import via CSV?
TestMaster Pro accepts CSV-formatted time-temperature-RH sequences with column headers “Time_min”, “Temp_C”, “RH_pct” — enabling direct import of legacy or externally generated test scripts.
How is condensation managed during rapid cooling cycles?
The chamber employs pre-cooled air bypass and controlled dew-point modulation during descent phases, minimizing interior surface condensation; optional drain pan heaters further suppress residual moisture accumulation.