Tuofeng TF-320A Programmable Thermal Cycling Environmental Test Chamber
| Brand | Tuofeng |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | TF-320A-1000L |
| Temperature Range | −70 °C to +100 °C (optional up to +150 °C) |
| Temperature Fluctuation | ±0.1 °C |
| Temperature Uniformity | ±0.1 °C |
| Temperature Deviation | ±2 °C |
| Heating Time (−70 °C to +100 °C) | ≤60 min |
| Cooling Time (+25 °C to −70 °C) | ≤45 min / ≤60 min / ≤80 min (configurable) |
| Internal Chamber Dimensions (W×H×D) | 800 × 1000 × 1000 mm |
| Humidity Range | 20–98% RH |
| Humidity Uniformity | ±3.0% RH |
| Humidity Control Accuracy | ±2.0% RH |
| Heating Rate | 4 °C/min (average) |
| Cooling Rate | 1 °C/min (average) |
| Controller | TEMI (South Korea) |
| Compressor | Tecumseh (France) |
| Construction Material | SUS304 stainless steel |
| Insulation | High-density polyurethane foam with chlorinated ethyl carbamate formulation |
| Cooling System | Air/water-cooled single/dual-stage reciprocating compressor |
| Safety Protections | Fuseless circuit breaker, compressor overload protection, refrigerant high/low pressure switches, overtemperature/overhumidity cut-off, fault alarm system |
| Power Supply | 1φ220VAC±10% 50/60Hz or 3φ380VAC±10% 50/60Hz (selectable) |
Overview
The Tuofeng TF-320A Programmable Thermal Cycling Environmental Test Chamber is an industrial-grade climatic test system engineered for precise, repeatable simulation of extreme temperature and humidity conditions across defined time profiles. It operates on a dual-refrigeration cycle architecture with cascade compression technology, enabling stable operation from −70 °C to +100 °C (optionally extended to +150 °C), and concurrent humidity control between 20% and 98% RH. The chamber employs forced-air convection with optimized airflow distribution—validated via ISO 16750-4 and IEC 60068-3-5—ensuring uniform thermal exposure throughout the 1000 L internal workspace (800 × 1000 × 1000 mm). Designed for compliance-driven validation workflows, it supports programmable ramp-soak cycles, step transitions, and real-time deviation monitoring, making it suitable for reliability qualification, accelerated life testing, and environmental stress screening (ESS) in R&D and production QA environments.
Key Features
- High-fidelity temperature control with ±0.1 °C fluctuation and ±0.1 °C uniformity—verified per ISO 16750-4 Annex D and ASTM E145 Class I specifications
- Configurable cooling performance: selectable cooling rates (≤45/60/80 min from +25 °C to −70 °C) via dual-stage or single-stage refrigeration configuration
- SUS304 stainless steel interior and exterior construction with corrosion-resistant electrostatic powder coating on structural frame
- Multi-layer insulation using high-density polyurethane foam with chlorinated ethyl carbamate formulation—providing thermal resistance >0.8 m²·K/W at −70 °C
- TEMI programmable controller (South Korea) with 100-segment profile memory, USB data logging, and RS485 Modbus RTU interface for SCADA integration
- Comprehensive safety architecture: refrigerant pressure monitoring, compressor oil-level detection, overtemperature/overhumidity interlock, and audible/visual fault alerts with event timestamping
Sample Compatibility & Compliance
The TF-320A accommodates large-format test specimens—including automotive ECUs, aerospace avionics modules, medical device enclosures, and full-size consumer electronics assemblies—within its 1000 L workspace. Its mechanical design conforms to IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), IEC 60068-2-14 (temperature cycling), and IEC 60068-2-30 (damp heat, cyclic). It meets national and military standards including GB/T 2423.1–2001, GB/T 2423.2–2001, GB/T 2423.4–1993, GJB 150.3–2009, GJB 150.4–2009, and GJB 150.9–2009. All thermal and humidity calibration procedures follow ISO/IEC 17025-accredited traceability paths, and system validation documentation supports GLP and GMP audit requirements per FDA 21 CFR Part 11 when paired with compliant data management software.
Software & Data Management
The TEMI controller provides native support for standard test profiles (e.g., MIL-STD-810G Method 502.5, JEDEC JESD22-A104E) and allows user-defined multi-step sequences with independent ramp rates, dwell durations, and conditional branching. Raw sensor data (PT100 temperature probes, capacitive RH sensors) is logged at 1 Hz resolution and exportable in CSV format via USB or Ethernet. Optional PC-based software enables remote monitoring, alarm notification via email/SMS, electronic signature capture, and automated report generation aligned with ISO 17025 reporting templates. Audit trail functionality records all parameter changes, user logins, and calibration events with immutable timestamps—meeting FDA 21 CFR Part 11 requirements for regulated laboratories.
Applications
- Environmental stress screening (ESS) of printed circuit boards and embedded systems prior to burn-in
- Thermal cycling validation of battery packs (Li-ion, solid-state) under IEC 62660-2 and UL 1642 protocols
- Material compatibility testing of polymer seals, adhesives, and conformal coatings per ASTM D570 and ISO 62
- Reliability qualification of automotive components per AEC-Q200 and ISO 16750-4
- Pre-compliance testing for CE, FCC, and IEC 60601-1 environmental clauses in medical device development
- Accelerated aging studies of pharmaceutical packaging under ICH Q1A(R2) stability guidelines
FAQ
What is the maximum allowable ambient temperature for continuous operation?
The chamber requires an ambient environment of 5–30 °C and ≤85% RH for rated performance; operation above 30 °C may reduce cooling capacity and extend stabilization times.
Can the TF-320A be integrated into a centralized facility monitoring system?
Yes—via RS485 Modbus RTU or optional Ethernet/IP interface, supporting integration with Siemens Desigo, Honeywell Experion, or custom SCADA platforms.
Is third-party calibration certification available?
Tuofeng provides NIST-traceable factory calibration reports; optional on-site calibration by CNAS-accredited providers is available upon request.
Does the system support humidity ramping during temperature transitions?
Yes—the TEMI controller permits synchronized humidity and temperature programming, including dew point tracking and condensation avoidance logic.
What maintenance intervals are recommended for the refrigeration system?
Compressor oil and filter replacement every 12 months or 2000 operating hours; refrigerant charge verification annually per ISO 5149-2 guidelines.
