Tuofeng TFW-293 Electronic Universal Testing Machine for Cable Material Tensile Testing
| Brand | Tuofeng |
|---|---|
| Model | TFW-293 |
| Type | Electromechanical Universal Testing Machine |
| Maximum Load Capacity | 300 kN |
| Load Accuracy | ±0.5% |
| Compliance | GB/T 16491–2008, JJG 475–2008, ASTM E4, ISO 7500-1, DIN 51221, JIS B 7721 |
| Control System | PC-based closed-loop servo control |
| Drive System | Imported servo motor with precision worm-gear reducer |
| Actuation | High-accuracy preloaded ball screw |
| Test Speed Range | 0.001–500 mm/min (infinitely variable) |
| Effective Test Width | 600 mm (customizable) |
| Vertical Travel | 800 mm (extendable) |
| Displacement Measurement | Optical encoder, accuracy ±0.005% of reading |
| Strain Measurement | Optional extensometer or large-deformation sensor, accuracy ±0.005% of reading |
| Safety Protection | Dual electronic limit switches, emergency stop button, overload protection (>110% F.S.), automatic return after test |
| Software | Multi-language (English/Chinese), compliant with FDA 21 CFR Part 11 audit trail requirements for GLP/GMP environments |
| Data Output | Real-time stress–strain, force–displacement, force–time, and displacement–time curves |
Overview
The Tuofeng TFW-293 Electronic Universal Testing Machine is a high-precision electromechanical system engineered for standardized mechanical property evaluation of cable materials—including insulated conductors, polymer sheaths, armored jackets, and composite shielding layers—under controlled uniaxial loading conditions. Based on closed-loop servo-controlled load application and high-resolution displacement feedback, the instrument implements quasi-static tensile, compression, bending, shear, tear, peel, and puncture testing per internationally recognized methodologies. Its architecture adheres to the metrological traceability framework defined in ISO/IEC 17025 and mechanical testing standards including ASTM D638 (plastics), ASTM D882 (thin films), IEC 60811 (cable insulation), and GB/T 2951 (electric cable test methods). The machine’s 300 kN capacity enables full-scale qualification of medium-voltage and high-voltage cable assemblies, while its ±0.5% load accuracy and sub-micron displacement resolution ensure repeatability required for QC release and R&D validation.
Key Features
- Robust dual-column frame with reinforced steel construction, optimized for torsional rigidity during high-load cable pull tests
- Imported high-torque servo motor coupled with precision worm-gear reduction and preloaded recirculating ball screw for smooth, backlash-free motion control
- Full-range load cell with internal temperature compensation and digital filtering to minimize drift under extended dwell or creep testing
- Modular gripping system: pneumatic, hydraulic, or mechanical wedge-action fixtures compatible with flat, round, and irregular cross-section cable specimens
- Dual-speed motorized crosshead movement—fast positioning (200 mm/min) and fine-adjustment (0.001 mm/min)—enabling rapid setup and precise strain-rate control
- Integrated safety architecture: hardware-level emergency stop, dual independent software limit checks, overload cutoff at 110% of rated capacity, and programmable soft limits per test method
- Real-time synchronization of load, displacement, and optional strain signals at ≥1 kHz sampling rate for dynamic event capture
Sample Compatibility & Compliance
The TFW-293 accommodates cable specimens ranging from 0.5 mm² stranded copper conductors to 1200 mm² aluminum-armored power cables. Standard configurations support flat tensile coupons cut from insulation layers (e.g., XLPE, EPR, PVC), jacket strips, metallic tapes, and braided shields. Custom fixtures enable longitudinal tensile testing of finished cables per IEC 60228 or bending fatigue simulation using rotating drum fixtures. All mechanical measurements comply with national and international regulatory frameworks: GB/T 16491–2008 (China), ASTM E4–2022 (load verification), ISO 7500-1:2018 (static calibration), and EN 10002-1 (metallic materials). The system supports full audit trails, user access levels, and electronic signature functionality aligned with FDA 21 CFR Part 11 and EU Annex 11 for regulated laboratories.
Software & Data Management
Tuofeng TestSuite™ v5.2 is a Windows-based, multi-language platform supporting English, Simplified Chinese, Traditional Chinese, and German. It provides configurable test templates for ISO 527, ASTM D3039, GB/T 1040, and cable-specific protocols such as IEC 60811-501 (tensile properties of insulating and sheathing compounds). The software logs all operator actions, parameter changes, and calibration events with timestamped, non-erasable records. Raw data are stored in encrypted .tdb binary format with ASCII export capability (.csv, .txt). Stress–strain curves support overlay comparison across up to 32 datasets; statistical summaries include mean, SD, CV%, min/max, and confidence intervals. Reports conform to ISO/IEC 17025 documentation requirements and can be exported as PDF with embedded digital signatures.
Applications
- Tensile characterization of thermoplastic and thermoset insulation compounds (elongation at break, tensile strength, yield point)
- Compression testing of cable bedding materials and fire-retardant fillers
- Bending stiffness evaluation of armored cables via three-point flexure per IEC 60227
- Peel strength measurement of laminated shield tapes and adhesive bonding layers
- Tear propagation resistance of halogen-free low-smoke (HFFR) jacketing materials
- Creep and stress-relaxation behavior of cross-linked polyethylene (XLPE) under elevated temperature
- Qualification testing for type approval per UL 1581, CSA C22.2 No. 0.3, and EN 50396
FAQ
What standards does the TFW-293 support for cable material testing?
It fully supports IEC 60811 series, GB/T 2951, ASTM D638/D882/D3039, UL 1581 Section 1060, and EN 50396 for mechanical and physical property verification.
Can the system perform high-temperature tensile testing?
Yes—when integrated with an environmental chamber (optional), it operates from –70°C to +300°C with real-time thermal compensation of load and displacement readings.
Is the software compliant with FDA 21 CFR Part 11?
Yes—TestSuite™ v5.2 includes role-based access control, electronic signatures, audit trail logging, and data integrity safeguards validated per ALCOA+ principles.
How is traceability ensured for calibration and verification?
Each unit ships with NIST-traceable certificate of calibration, and built-in verification routines per ASTM E4 allow daily verification without external equipment.
What maintenance is required for long-term accuracy?
Annual recalibration of the load cell and encoder is recommended; routine inspection of ball screw lubrication and grip jaw wear is advised every 500 operational hours.
