Changchun Intelligent LDS-2KN / LDS-5KN Universal Tensile Testing Machine

Overview

The Changchun Intelligent LDS-2KN and LDS-5KN Universal Tensile Testing Machines are electromechanical static testing systems engineered for precision mechanical property characterization of polymeric, composite, textile, and thin-film materials. Based on the fundamental principles of uniaxial quasi-static loading per ASTM D638, ISO 527-1, and GB/T 1040.1, these machines apply controlled tensile force via a servo-driven crosshead while synchronously measuring load (via high-stability S-type load cell), displacement (via encoder-based positional feedback), and time. The dual-capacity design—offering 2 kN and 5 kN maximum force ratings—enables seamless transition between low-force elastomer testing and higher-strength rigid plastic or reinforced film evaluation. All models comply with ISO 7500-1 Class 1 accuracy requirements for force measurement and feature closed-loop speed control to maintain prescribed strain rates across the full 5–500 mm/min range.

Key Features

• High-reproducibility dual-screw frame architecture ensuring axial alignment stability and minimal frame deflection under load
• Integrated digital crosshead position display with calibrated scale reference for rapid visual verification
• Real-time multi-axis curve generation: Force–Elongation, Stress–Strain, Strength–Time, Force–Time, Elongation–Time, and Strain–Time
• Advanced software-enabled region zoom: Select any segment of the test curve for magnified analysis without data interpolation artifacts
• Multi-curve overlay capability with user-defined color mapping for comparative batch or material-grade evaluation
• Configurable automatic stop-on-fracture logic with sub-millisecond response to abrupt load drop
• Comprehensive hardware safety suite: overload cutoff, thermal shutdown, voltage anomaly detection, and mechanical end-stop limits
• Bi-directional manual override with incremental jog controls for precise specimen alignment and pre-load adjustment
• Auto-calibration support using certified reference weights and electrical signal verification protocols
• Zero-point compensation for force, displacement, and strain channels—executed manually or triggered automatically before each test

Sample Compatibility & Compliance

The LDS series accommodates standardized specimens per ASTM D882 (thin films), ASTM D638 (plastics), ASTM D1876 (peel), and ISO 1133 (melt flow index correlation). Optional fixtures—including woven strap clamps, pneumatic grips, and peel-adhesion jigs—extend applicability to non-standard geometries. All system firmware and software modules adhere to GLP documentation standards, supporting full audit trails for test parameters, operator ID, calibration logs, and raw data timestamps. While not FDA 21 CFR Part 11 validated out-of-the-box, the software architecture supports electronic signature integration and exportable XML/CSV datasets compatible with LIMS environments.

Software & Data Management

The proprietary Windows-based testing software provides ISO/IEC 17025-aligned data integrity controls. Each test session generates a timestamped project file containing raw sensor outputs, processed curves, metadata (operator, date, environmental notes), and embedded configuration snapshots. Reports are exportable in native .xlsx format for statistical post-processing or as formatted .docx documents with customizable headers, logos, and pass/fail thresholds. Curve data points can be extracted at user-selected intervals for third-party modeling (e.g., Mooney-Rivlin fitting). All stored data retains original acquisition resolution—no lossy compression or interpolation is applied during archiving.

Applications

• Tensile strength and elongation-at-break assessment of thermoplastic sheets, PVC films, and PET laminates
• Peel strength quantification for pressure-sensitive adhesives and medical device packaging
• Tear resistance evaluation of nonwovens and geotextiles per ASTM D1938
• Modulus determination (secant, tangent, chord) for elastomeric compounds used in automotive seals
• Quality control screening of extruded profiles and injection-molded components against internal specifications
• Research-grade mechanical profiling of biodegradable polymers under controlled humidity conditions

FAQ

What international standards does the LDS series support?
ASTM D638, ASTM D882, ASTM D1876, ISO 527-1, ISO 1133, ISO 7500-1, and GB/T 1040.1 are fully implemented in test method templates.
Can the system be integrated into an existing laboratory network?
Yes—Ethernet-enabled communication allows remote monitoring and centralized data collection via TCP/IP; no proprietary drivers required.
Is traceable calibration documentation provided?
Each unit ships with a factory calibration certificate referencing NIST-traceable standards; annual recalibration services are available through authorized service centers.
What is the warranty coverage for the load cell and controller?
Standard 24-month limited warranty covers parts and labor for all electro-mechanical components, including the Transducer Techniques (USA) load cell and motion control electronics.
Does the software support multi-language UI?
English and Simplified Chinese interfaces are included; additional language packs may be deployed via configuration file updates.