Tuofeng TF-320B-225L Temperature and Humidity Controlled Environmental Test Chamber

Overview

The Tuofeng TF-320B-225L Temperature and Humidity Controlled Environmental Test Chamber is an engineered precision system designed for accelerated environmental stress testing of materials and finished products under rigorously controlled thermal and hygrothermal conditions. Operating on a dual-loop PID control architecture with independent temperature and humidity regulation circuits, the chamber employs a high-efficiency vapor compression refrigeration cycle combined with steam-based humidification and electric heater-assisted dehumidification. Its core function is to replicate real-world climatic exposures—including extreme cold, elevated heat, cyclic humidity, and combined temperature-humidity profiles—to assess product reliability, material degradation kinetics, dimensional stability, and functional integrity over time. The system supports both steady-state conditioning and programmable ramp-soak-cycle profiles, making it suitable for qualification testing in R&D labs, QC/QA departments, and third-party certification facilities operating under GLP or ISO/IEC 17025 frameworks.

Key Features

• Stainless steel (SUS304) interior chamber and insulated double-wall construction ensure corrosion resistance, long-term dimensional stability, and minimal thermal bridging.
• High-density polyurethane insulation with chlorinated ethyl ester formulation provides superior thermal resistance and low outgassing—critical for electronics and medical device validation.
• Dual-stage hermetic compressor (Tecumseh) enables stable low-temperature operation down to −70 °C while maintaining precise humidity control across the full range (20–98% RH).
• TEMI Korean touchscreen controller with 30 programmable segments, data logging (USB export), real-time curve display, and password-protected parameter locking meets traceability requirements for regulated environments.
• Comprehensive safety architecture includes over-temperature/over-humidity cut-off, refrigerant high/low pressure monitoring, compressor overload protection, fuse-based circuit isolation, and audible/visual fault alerting.
• Configurable power input (1φ220VAC or 3φ380VAC) accommodates global laboratory infrastructure standards without external transformers.

Sample Compatibility & Compliance

The TF-320B-225L accommodates diverse sample geometries up to 600 mm (W) × 850 mm (H) × 800 mm (D), supporting test specimens ranging from PCB assemblies and polymer films to automotive ECUs and pharmaceutical packaging. Its validated performance aligns with internationally recognized environmental test standards including GB/T 2423.1–4 (equivalent to IEC 60068-2-1, -2, -3, -4), GB/T 2423.22 (temperature change), GJB 150.3/4/9 (military environmental test methods), and ASTM D4332 (conditioning of plastics). All control algorithms and sensor calibrations are traceable to national metrology institutes, and the chamber’s temperature/humidity uniformity (±0.1 °C / ±0.1% RH) satisfies Class II requirements per ISO 17025 Annex A.2 for accredited testing laboratories.

Software & Data Management

The TEMI controller firmware supports full audit trail functionality—including operator ID, parameter changes, alarm events, and runtime logs—with timestamped records stored internally and exportable via USB to CSV format. Optional PC-based software (Tuofeng TestLink Suite) enables remote monitoring, multi-chamber synchronization, statistical process control (SPC) charting, and automated report generation compliant with FDA 21 CFR Part 11 requirements (electronic signatures, audit trail integrity, user access levels). Data encryption and role-based permissions ensure secure handling during GMP or ISO 13485 audits.

Applications

• Electronics: Thermal cycling of printed circuit boards, solder joint fatigue analysis, and moisture sensitivity level (MSL) pre-conditioning per J-STD-020.
• Automotive: Validation of infotainment modules, sensors, and battery management systems under DIN 70121 and ISO 16750-4 environmental stress profiles.
• Pharmaceuticals: Stability testing of primary packaging per ICH Q1A(R2), including long-term and accelerated conditions (e.g., 40 °C/75% RH).
• Aerospace: Component qualification per RTCA DO-160 Section 4 (temperature) and Section 5 (humidity), including rapid temperature transition protocols.
• Materials Science: Hygrothermal aging of composites, elastomers, and adhesives to quantify moisture diffusion coefficients and glass transition shifts.

FAQ

What is the maximum allowable ambient temperature for continuous operation?

The chamber is rated for installation in environments between 5 °C and 30 °C, with relative humidity ≤85% non-condensing. Operation outside this range may impair cooling efficiency and compromise humidity control accuracy.

Can the TF-320B-225L perform rapid temperature transitions?

Yes—it supports programmable ramp rates from 1.0 to 3.0 °C/min (average heating rate ~4 °C/min; average cooling rate ~1 °C/min), meeting requirements for temperature shock simulation when paired with optional auxiliary cooling units.

Is calibration documentation included with shipment?

Each unit ships with a factory calibration certificate covering NIST-traceable PT100 temperature sensors and capacitive RH transducers, valid for 12 months under standard use conditions.

Does the system support remote diagnostics and firmware updates?

Via optional Ethernet module and Tuofeng Remote Service Portal, technicians can perform real-time diagnostics, log analysis, and secure over-the-air firmware upgrades without on-site visits.

How is humidity controlled at sub-zero temperatures?

Below 0 °C, the system operates in dry-cold mode with active dehumidification via reheating of chilled air and precise dew point modulation—ensuring stable low-RH conditions without condensation or ice formation on critical components.