Tuofeng TFW-305 High-Low Temperature Electronic Universal Testing Machine

Overview

The Tuofeng TFW-305 High-Low Temperature Electronic Universal Testing Machine is an integrated electromechanical system engineered for precision mechanical property characterization under controlled thermal environments. It combines a high-stiffness dual-column load frame with a programmable environmental chamber capable of stable operation from −40 °C to +100 °C. The system operates on the principle of servo-controlled displacement and closed-loop force feedback, enabling accurate application and measurement of tensile, compressive, flexural, shear, peel, and tear loads across metallic, polymeric, ceramic, elastomeric, and composite specimens. Its modular architecture supports both ambient and conditioned testing without hardware reconfiguration—eliminating thermal drift-related calibration recalibration cycles. Designed in accordance with ISO 7500-1 (Class 0.5), ASTM E4, and GB/T 16491, the TFW-305 delivers traceable, repeatable results suitable for R&D validation, quality control release, and regulatory submission workflows.

Key Features

• Full-range force transducer with ±0.5% accuracy and 1/500,000 internal resolution—no range switching required across 0.02 N to 300 kN
• High-resolution extensometry support: deformation measurement range 0.2–100% FS, error ≤ ±0.5%, resolution up to 1/300,000 FS
• Programmable temperature chamber with dual-mode control (compressor cooling + NiCr heating), ±2 °C uniformity over 100 mm longitudinal zone
• Thermally isolated test zone featuring 316 stainless steel interior, 304 stainless steel housing, and multi-layer alumina-silica fiber insulation
• Integrated 50 mm-diameter top/bottom access ports with sliding thermal shields to minimize ambient heat exchange during specimen loading
• Real-time crosshead displacement accuracy of ±0.5% of reading, synchronized with force and temperature data streams
• Ruggedized host frame (380 kg mass) with 840 mm column spacing and 1000 mm vertical travel—optimized for large-section or multi-specimen fixtures

Sample Compatibility & Compliance

The TFW-305 accommodates standardized test specimens per ISO 6892-1 (tensile metals), ASTM D638 (plastics), ASTM D3039 (composites), ISO 178 (flexure), ISO 148 (impact-ready mounting), and GB/T 228.1. Its chamber design permits direct mounting of wedge, pneumatic, or hydraulic grips without obstructing thermal airflow. The system complies with ISO 17025 documentation requirements for calibration traceability and meets mechanical safety standards EN 61000-6-2 (EMC) and EN 61000-6-4. For regulated environments, optional audit-trail-enabled firmware supports FDA 21 CFR Part 11 compliance, including electronic signatures, user-level access control, and immutable test record archiving. All force, displacement, and temperature channels are independently calibrated and certified to national metrology institute standards (e.g., CNAS-accredited labs).

Software & Data Management

Control and analysis are executed via Windows-based Tuofeng TestSuite v4.2—a deterministic real-time acquisition platform with sub-millisecond sampling synchronization across all analog inputs. The software supports automated test sequencing (e.g., ramp-hold-ramp profiles), multi-curve overlay, modulus calculation (secant/tangent/initial), yield point detection (0.2% offset), and fracture energy integration. Raw data exports to CSV, XML, and universal .tdms formats; reports conform to ISO/IEC 17025 templates with embedded metadata (operator ID, calibration certificate IDs, environmental logs). Optional modules include GLP/GMP-compliant electronic lab notebook (ELN) integration, LIMS connectivity via ASTM E1461-compliant API, and cloud backup with AES-256 encryption. No third-party runtime dependencies are required—deployment is self-contained and validated for Windows 10/11 LTSB editions.

Applications

• Low-temperature ductility assessment of aerospace aluminum alloys (−40 °C) per AMS 2355
• High-temperature creep resistance evaluation of PEEK and polyimide composites (+80 °C to +100 °C)
• Adhesive bond strength mapping across thermal cycling profiles (−20 °C ↔ +60 °C) for automotive NVH components
• Compression testing of ceramic matrix composites (CMCs) under inert atmosphere-compatible chamber modifications
• Dynamic modulus profiling of thermoplastic elastomers (TPEs) using strain-controlled cyclic loading protocols
• Quality conformance testing of medical device polymer housings per ISO 10993-12 and USP

FAQ

What is the maximum specimen height accommodated within the temperature chamber?
The internal chamber dimensions are 360 × 300 × 500 mm (W × D × H); with standard top/bottom access ports (Ø50 mm), effective vertical test space is limited to ~400 mm when using conventional grips.
Can the system perform simultaneous force-displacement-temperature acquisition at 100 Hz?
Yes—the controller supports synchronized sampling at up to 1 kHz across all three channels, with default factory configuration set to 100 Hz for optimal noise rejection and storage efficiency.
Is third-party calibration certification included with delivery?
Each unit ships with a factory calibration certificate traceable to NIM (China National Institute of Metrology); ISO/IEC 17025-accredited external calibration is available as an optional service.
Does the software support custom test method scripting?
Yes—TestSuite v4.2 includes a built-in Python 3.9 interpreter (embedded, no external installation) enabling user-defined control logic, conditional branching, and real-time pass/fail decisioning.
What safety interlocks prevent operator exposure during low-temperature operation?
The chamber features redundant thermal cutouts, door-position sensing, ground-fault circuit interruption (GFCI), and automatic compressor shutdown if ambient temperature exceeds +35 °C or chamber vacuum drops below −0.5 kPa.