Tuofeng TF-320B-800L Programmable Temperature and Humidity Environmental Test Chamber

Overview

The Tuofeng TF-320B-800L Programmable Temperature and Humidity Environmental Test Chamber is an engineered precision system designed for controlled simulation of climatic stress conditions in laboratory and industrial quality assurance environments. Based on forced-air convection with dual-stage refrigeration and PID-controlled steam humidification, it delivers stable, repeatable thermal and hygroscopic profiles across wide operational ranges. Its architecture supports both steady-state conditioning and dynamic cycling protocols—including temperature-only, humidity-only, and combined temperature-humidity ramping—enabling compliance testing per international environmental stress standards. The chamber is purpose-built for reliability under continuous operation, featuring a robust stainless-steel inner chamber, high-density polyurethane insulation, and redundant safety monitoring systems essential for long-duration validation studies in regulated sectors.

Key Features

• Programmable multi-segment controller (Korean TEMI brand) with intuitive touchscreen interface, real-time graphing, and data logging capability
• Dual-stage or single-stage hermetic compressors (French Tecumseh units) with water- or air-cooled condensation options for optimized cooling efficiency
• SUS304 stainless-steel interior chamber and insulated outer housing with high-density chlorinated polyether foam insulation (thermal conductivity ≤0.022 W/m·K)
• Precision humidity generation via electrically heated stainless-steel steam generator; dehumidification via direct expansion cooling coil with auto-defrost cycle
• Comprehensive protection suite: compressor overheat/overload cutoff, refrigerant high/low pressure switches, over-temperature and over-humidity cutouts, fuse-based electrical isolation, and audible/visual fault alert system
• Standard operating ambient: 5–30 °C, ≤85% RH; power supply options include 1φ220 VAC ±10%, 50/60 Hz or 3φ380 VAC ±10%, 50/60 Hz

Sample Compatibility & Compliance

The TF-320B-800L accommodates large-format test specimens—including full-size automotive ECUs, medical device enclosures, aerospace composite panels, and consumer electronics assemblies—within its 1000 L internal volume (1000 mm × 1000 mm × 1000 mm). Its uniformity performance (±0.1 °C / ±0.1% RH) meets the spatial stability requirements defined in ISO 16750-4, IEC 60068-2 series, and MIL-STD-810H Method 502.5. It is validated for use in GLP-compliant laboratories and supports audit-ready documentation when integrated with optional Ethernet-enabled controllers. The system fulfills mandatory test conditions specified in GB/T 2423.1–2423.4 (China), IEC 60068-2-1/2/3/14, GJB 150.3/4/9 (PLA Military Standards), and ASTM D4332 for conditioning prior to mechanical or electrical performance evaluation.

Software & Data Management

Equipped with TEMI’s embedded firmware, the controller enables up to 99 programmable test cycles, each supporting 99 segments with independent ramp/hold parameters for temperature and humidity. Real-time trend curves are exportable via USB or RS485 to PC-based analysis tools. Optional software modules provide 21 CFR Part 11–compliant user access control, electronic signatures, and audit trail generation—including timestamped records of setpoint changes, alarm events, and calibration interventions. All logged data adhere to CSV and XML formats compatible with LIMS integration and automated report generation workflows.

Applications

This chamber serves as a core asset in R&D validation, incoming QC screening, and accelerated life testing across multiple regulated industries. In electronics manufacturing, it supports JEDEC JESD22-A104 (temperature cycling) and A110 (humidity bias) qualification. For pharmaceutical packaging, it replicates ICH Q1A(R2) long-term and accelerated stability storage conditions. Automotive suppliers apply it for ISO 16750-4 thermal shock and humidity resistance verification. Additionally, it is widely deployed for material aging studies (e.g., polymer hydrolysis, coating adhesion loss), battery thermal runaway preconditioning, and sensor drift characterization under sustained humidity exposure.

FAQ

What is the maximum allowable ambient temperature for continuous operation?

The chamber must be installed in an environment maintained between 5 °C and 30 °C, with relative humidity not exceeding 85% RH (non-condensing). Exceeding these limits may impair compressor efficiency and humidity control accuracy.

Can the TF-320B-800L perform rapid temperature transitions?

Yes—the standard configuration achieves average heating rates of 1.0–3.0 °C/min and cooling rates of ~1.0 °C/min from 25 °C to −40 °C. Optional high-performance refrigeration packages can improve cooling speed by up to 40% for specialized thermal shock protocols.

Is third-party calibration certification available?

Tuofeng provides factory calibration reports traceable to NIM (National Institute of Metrology, China). Upon request, accredited external calibration (ISO/IEC 17025) and on-site verification services can be arranged through authorized metrology partners.

How is humidity stability maintained at low temperatures?

At sub-zero setpoints, humidity control is suspended below 0 °C per IEC 60068-3-5 to prevent frost accumulation. The system automatically disables steam injection and enters dry-cold mode while retaining precise temperature regulation.

Does the chamber support remote monitoring and control?

With the optional Ethernet module, users can access live chamber status, modify programs, download logs, and receive email/SMS alerts via secure web interface or MODBUS TCP protocol—fully compatible with enterprise SCADA and MES platforms.