Tuofeng TFW-285 High-Low Temperature Electronic Universal Testing Machine
| Brand | Tuofeng |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Electronic Universal Testing Machine |
| Model | TFW-285 |
| Load Capacity Range | 0.01 N to 300 kN |
| Load Accuracy | ±0.5% |
| Accuracy Class | 0.5 |
| Force Measurement Range | 0.4–100% FS |
| Force Resolution | 1/500,000 of full scale (full-range, no switching) |
| Deformation Measurement Range | 0.2–100% FS |
| Deformation Accuracy | ±0.5% of reading |
| Deformation Resolution | up to 1/300,000 |
| Displacement Accuracy | ±0.5% of reading |
| Column Spacing (inner) | 840 mm |
| Crosshead Travel (standard) | 1000 mm |
| Host Dimensions | 1250 × 560 × 2400 mm |
| Power Supply | AC 220 V / 50 Hz, ±10%, 750 W |
| Host Weight | ~380 kg |
| Environmental Operating Range | +5 °C to +35 °C |
| Temperature Chamber Range | –40 °C to +100 °C |
| Chamber Heating Power | 1.5 kW |
| Chamber Internal Dimensions | 360 × 300 × 500 mm (W × D × H) |
| Temperature Uniformity (100 mm axial) | ±2 °C |
| Ramp Time (to +100 °C) | <30 min |
| Thermal Equilibration Time | ≤5 min (both above and below 0 °C) |
| Control System | Programmable PID with Pt100 sensors |
| Chamber Construction | 304 stainless steel exterior, 316 mirror-finish interior, ceramic fiber insulation |
| Safety Features | Leakage current protection, overcurrent circuit breaker |
Overview
The Tuofeng TFW-285 High-Low Temperature Electronic Universal Testing Machine is an electromechanical force-testing platform engineered for precision mechanical characterization of metallic and non-metallic materials across a wide thermal spectrum—from –40 °C to +100 °C. It integrates a high-stiffness dual-column load frame with a programmable environmental chamber, enabling controlled uniaxial tensile, compression, bending, peel, tear, and shear testing under thermally regulated conditions. The system operates on the principle of closed-loop servo-controlled displacement and load actuation, where a precision ball-screw-driven crosshead applies calibrated force while synchronized transducers continuously monitor load, deformation, and displacement. Its modular architecture supports seamless integration of extensometers, video extensometry, and environmental accessories—ensuring compliance with standardized test methodologies defined in ISO 6892-1, ASTM E8/E21, GB/T 228.1, JIS Z 2241, and DIN 50125.
Key Features
- High-resolution force measurement system with ±0.5% accuracy across 0.4–100% of full scale (FS), supported by a 1/500,000 internal resolution digitizer—enabling reliable detection of sub-millinewton forces at low ranges and stable high-load control up to 300 kN.
- Dual-mode temperature chamber featuring 316 mirror-finish stainless steel interior, multi-layer ceramic fiber insulation, and independent compressor-heater regulation—achieving ±2 °C uniformity over a 100 mm axial zone and thermal equilibration in ≤5 minutes.
- Programmable thermal profile capability via embedded PID controller with Pt100 feedback sensors, supporting ramp-hold cycles and real-time logging of chamber temperature alongside mechanical data.
- Rigid load frame with 840 mm column spacing and 1000 mm standard crosshead travel—optimized for large specimens and multi-specimen fixtures, including custom high-temperature grips and cryogenic adapters.
- Windows-based test control software with GLP-compliant audit trail, electronic signature support, and 21 CFR Part 11-ready configuration options—including user role management, data integrity logs, and immutable report generation.
- Modular I/O architecture compatible with third-party strain gauges, digital video extensometers, and acoustic emission modules—facilitating advanced failure analysis and time-dependent property evaluation (e.g., creep, stress relaxation).
Sample Compatibility & Compliance
The TFW-285 accommodates a broad range of specimen geometries—from thin polymer films (≥0.05 mm thick) and elastomeric strips to structural metal coupons (up to 50 mm wide × 10 mm thick) and composite laminates. Standardized test fixtures include wedge-action tensile grips, compression platens, three- and four-point bending assemblies, and peel test jigs—all rated for continuous operation within the chamber’s full thermal envelope. All mechanical measurements adhere to ISO 7500-1 (static calibration) and ISO 5893 (dynamic verification). The integrated environmental chamber meets IEC 60068-2-1 (cold) and IEC 60068-2-2 (dry heat) requirements. Full traceability is maintained through factory calibration certificates aligned with national metrological standards (CNAS-accredited reference laboratories).
Software & Data Management
The proprietary Tuofeng TestMaster™ software provides real-time synchronization of thermal and mechanical parameters, enabling simultaneous plotting of load–displacement, stress–strain, and temperature–time curves. Raw data are stored in binary .tdf format with embedded metadata (operator ID, sample ID, calibration timestamp, chamber setpoint history). Export options include CSV, XML, and PDF reports compliant with ISO/IEC 17025 documentation requirements. Advanced analysis modules support automatic yield point detection (0.2% offset method), modulus calculation (tangent, secant, chord), and fracture toughness estimation per ASTM E1820. Audit trails record all parameter changes, test aborts, and manual overrides—retained for ≥10 years with optional network backup to NAS or LIMS interfaces.
Applications
- Mechanical qualification of aerospace alloys (e.g., Ti-6Al-4V, Inconel 718) at service-relevant cryogenic and elevated temperatures.
- Thermo-mechanical aging studies of thermoplastics (PP, PEEK, PEI) and elastomers (silicone, EPDM) under cyclic thermal loading.
- Adhesive bond strength evaluation per ASTM D1002 and ISO 4587—performed at both low-temperature storage and high-humidity conditioning points.
- Quality control of medical device components (e.g., nitinol stents, polymeric catheters) under simulated physiological thermal gradients.
- Research into viscoelastic transitions of shape-memory polymers and phase-change composites using controlled ramp-and-hold protocols.
- Validation of building material performance (concrete additives, fiber-reinforced cement) per EN 12390-3 and GB/T 50081 under freeze-thaw cycling.
FAQ
What standards does the TFW-285 comply with for force calibration?
The system conforms to ISO 7500-1 Class 0.5 requirements, with annual recalibration traceable to NIM (China National Institute of Metrology) or equivalent national standards bodies.
Can the environmental chamber be used independently of mechanical testing?
Yes—the chamber operates as a standalone programmable thermal unit with full data logging, suitable for thermal cycling validation and material preconditioning.
Is video extensometry supported for non-contact strain measurement?
Yes; the system includes USB3.0 vision interface ports and native driver support for industry-standard digital cameras and DIC software packages.
What safety interlocks prevent operator exposure during extreme temperature operation?
Hardware-enforced door-locking solenoids, chamber overtemperature cutoffs (±5 °C deviation), and real-time ground-fault monitoring ensure compliance with IEC 61000-6-2 EMC and IEC 61000-6-4 emission standards.
Does the software support automated batch testing with variable thermal profiles?
Yes—TestMaster™ allows creation of multi-step test sequences combining temperature ramps, dwell periods, and mechanical loading steps, each assigned unique pass/fail criteria and auto-generated summary reports.
