DRETOP THL-C225-I High-Low Temperature Environmental Test Chamber

Overview

The DRETOP THL-C225-I High-Low Temperature Environmental Test Chamber is an engineered precision system designed for controlled thermal stress testing under dynamic temperature cycling conditions. It operates on a dual-stage refrigeration architecture—utilizing a cascade compression cycle with shared evaporator-condenser interstage coupling—to achieve stable, repeatable operation across an extended range of -60 °C to +120 °C. This chamber conforms to fundamental thermal test principles defined in IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), and ISO 16750-4 (road vehicles—environmental conditions). Its primary function is to evaluate material integrity, dimensional stability, electrical performance, and mechanical reliability of components subjected to extreme ambient thermal transients—critical during design validation, qualification testing, and production lot screening.

Key Features

• Industrial-grade 7-inch color TFT touchscreen HMI with multi-language interface (English/Chinese), password-protected hierarchical access control (operator, engineer, administrator levels) to prevent unauthorized parameter modification;
• Programmable logic controller supporting up to 1000 stored test profiles, each containing up to 100 programmable segments with ramp/soak/hold capability, slope-controlled transitions, and scheduled start/stop functions;
• Dual-layer tempered glass observation window with integrated anti-frost heating film and LED interior lighting—prevents condensation-induced short circuits and enables real-time visual monitoring without thermal disturbance;
• Optimized forced-air convection system using high-efficiency centrifugal fans and aerodynamically tuned wind tunnels, delivering uniform airflow distribution and minimizing temperature gradients (≤2 °C uniformity) per ASTM E145 Class B requirements;
• Robust thermal insulation using polyurethane foam (≥100 mm thickness, closed-cell density ≥40 kg/m³) and silicone rubber door gasketing—maintains chamber integrity across full operating range with minimal thermal leakage;
• Independent PID auto-tuning algorithm continuously adapts to load variations and ambient fluctuations, ensuring long-term temperature stability at ±0.5 °C fluctuation tolerance;
• Standard 50 mm diameter test port (with EPDM sealing plug) allows concurrent electrical signal, pneumatic, or data cable feedthrough for live-in situ testing under thermal stress;
• Comprehensive safety architecture including over-temperature cut-off, compressor/fan overload protection, ground fault interruption, and automatic power recovery after grid interruption;
• Energy-efficient hermetic scroll compressors (imported brand), R404A/R23 refrigerant blend, and intelligent compressor staging reduce standby consumption while maintaining low-noise operation (<65 dB(A) at 1 m).

Sample Compatibility & Compliance

The THL-C225-I accommodates samples up to 225 L gross volume (600 × 500 × 750 mm internal dimensions), with two adjustable stainless-steel shelves (load capacity: 15 kg/shelf). It supports non-hazardous solid, semi-solid, and assembled electronic modules—including PCBs, sensors, connectors, battery packs, automotive ECUs, and polymer housings. The chamber meets structural and operational prerequisites for compliance with ISO/IEC 17025 accredited laboratories when used within documented SOPs. While not intrinsically explosion-proof, it may be operated in classified areas only when integrated with external purge systems compliant with ATEX Directive 2014/34/EU or NEC Class I, Division 2 requirements. All electrical components are rated IP20; optional RS485/USB interfaces enable traceable data logging aligned with FDA 21 CFR Part 11 and GLP/GMP audit trail requirements.

Software & Data Management

Embedded firmware provides real-time temperature logging at user-defined intervals (1 s to 60 min), with onboard storage for ≥30 days of continuous 1-second resolution data. Export formats include CSV-compatible Excel (.xlsx) and proprietary .drt binary files readable via DRETOP’s PC-based analysis suite (v3.2+). Optional USB mass storage mode permits direct file transfer without network dependency. For enterprise integration, the RS485 Modbus RTU interface supports bidirectional communication with SCADA platforms (e.g., Siemens WinCC, Rockwell FactoryTalk) and LIMS systems. All logged events—including alarms, program transitions, and manual interventions—are time-stamped with UTC synchronization and digitally signed to satisfy ALCOA+ data integrity criteria.

Applications

• Electronics: Thermal cycling of printed circuit assemblies per IPC-9701 and JEDEC JESD22-A104 standards;
• Automotive: Component validation per ISO 16750-4 and SAE J2223 for under-hood and cabin-mounted modules;
• Aerospace: Pre-flight environmental screening of avionics enclosures and composite fasteners;
• Materials Science: Coefficient of thermal expansion (CTE) assessment, polymer crystallinity shift analysis, and adhesive bond strength degradation studies;
• Quality Assurance: In-process verification of solder joint reliability, conformal coating integrity, and sealant performance across temperature extremes;
• Academic Research: Controlled environmental simulation for corrosion kinetics, phase transition thermodynamics, and accelerated aging protocols.

FAQ

What is the maximum sample weight the THL-C225-I can accommodate?
The chamber supports up to 30 kg total payload distributed across two shelves (15 kg per shelf), assuming uniform placement and unrestricted airflow.
Does the unit comply with international calibration traceability standards?
Yes—when equipped with optional NIST-traceable PT100 sensor kits and operated per ISO/IEC 17025-compliant procedures, the system supports external verification against national metrology institutes.
Can the THL-C225-I perform humidity-controlled tests?
No—this is a dry-thermal-only chamber. For combined temperature/humidity testing, refer to DRETOP’s THS series (e.g., THS-C225-I) featuring integrated steam humidification and dehumidification modules.
Is remote monitoring supported out-of-the-box?
Basic remote status viewing and alarm notification require optional Ethernet/WiFi add-on module (DRENET-EM1); full supervisory control necessitates integration via Modbus TCP gateway.
What maintenance intervals are recommended for compressor oil and refrigerant?
Under typical lab usage (≤6 h/day, ambient ≤30 °C), compressor oil inspection is advised every 24 months; refrigerant charge verification should occur biannually or after any refrigerant circuit service event.