Changchun Intelligent LDS Series Universal Testing Machine

Overview

The Changchun Intelligent LDS Series Universal Testing Machine is an electromechanical static testing system engineered for precision tensile, compression, flexural, and peel testing of polymeric, metallic, and fibrous materials. It operates on the principle of controlled displacement-driven force measurement using a high-stiffness dual-column frame, servo-controlled AC motor actuation, and closed-loop PID feedback regulation. The system conforms to fundamental mechanical testing standards—including ASTM D638 (tensile properties of plastics), ISO 527 (plastics—determination of tensile properties), and GB/T 1040 (Chinese national standard for plastic tensile testing)—and provides traceable, repeatable mechanical property data essential for quality control laboratories, R&D centers, and third-party certification facilities.

Key Features

• Robust dual-column load frame with rigid aluminum alloy construction and precision-ground guide rails, ensuring minimal deflection under maximum 5 kN load
• High-stability S-type load cell calibrated to ±1% full-scale accuracy, with digital signal conditioning and temperature-compensated analog-to-digital conversion
• PWM-based variable-speed drive delivering precise crosshead velocity control across the full 10–500 mm/min range, with real-time speed feedback and ±1% repeatability
• Integrated microprocessor controller featuring 128×64 dot-matrix LCD display, intuitive keypad navigation, and on-device parameter configuration (pre-set test modes, hold times, break detection thresholds)
• Onboard thermal microprinter enabling immediate hardcopy output of peak load, elongation at break, modulus, and stress–strain curve coordinates
• Modular fixture interface compatible with standardized wedge-action tensile grips, compression platens, and bend fixtures per ISO 2041 and ASTM E8/E8M mounting specifications

Sample Compatibility & Compliance

The LDS Series accommodates specimens ranging from thin polymer films (≥25 µm thickness) and paper substrates (60–300 g/m² basis weight) to braided textile cords and copper-clad aluminum wires (diameters 0.1–3.0 mm). Its clamping geometry supports both manual and pneumatic grip options for low-force (≤100 N) and high-force (up to 5 kN) applications. All mechanical and electrical subsystems comply with IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emission) electromagnetic compatibility requirements. The instrument’s operational logic and data handling workflow align with GLP documentation practices; raw force–displacement time-series data are timestamped and stored in non-volatile memory, supporting audit-ready traceability for regulated environments.

Software & Data Management

While the base LDS model operates as a stand-alone unit with embedded firmware, optional PC connectivity via RS-232 or USB-to-serial adapter enables integration with Changchun Intelligent’s proprietary UTMControl software. This Windows-based application supports multi-curve overlay, automatic calculation of Young’s modulus, yield strength, ultimate tensile strength (UTS), and percentage elongation, along with export to CSV, PDF, and XML formats. Audit trail functionality records operator ID, test date/time, calibration status, and parameter modifications—meeting foundational expectations of FDA 21 CFR Part 11 for electronic records in pharmaceutical packaging validation and medical device component testing.

Applications

• Tensile characterization of thermoplastic films (LDPE, PET, BOPP) per ASTM D882
• Peel strength evaluation of laminated packaging structures (e.g., aluminum foil–polyethylene composites)
• Mechanical validation of paperboard tensile index and burst strength in printing and packaging QA
• Wire bonding integrity assessment for copper-clad aluminum conductors used in automotive harnesses
• Quality conformance testing of woven and knitted textile bands against ISO 13934-1
• Compression testing of foam cores and elastomeric gaskets per ISO 844 and ASTM D3574

FAQ

Does the LDS Series support automatic return-to-start after test completion?
Yes—the microprocessor controller includes programmable post-test actions, including auto-return to initial position, dwell time before unloading, and zero-reset sequence.
Can the system be calibrated in-house using standard weights?
Load cell calibration requires certified dead-weight standards traceable to NIM (National Institute of Metrology, China) or equivalent national metrology institutes; routine verification may be performed using Class M1 reference masses.
Is the thermal printer compatible with continuous label stock?
The integrated microprinter accepts standard 57 mm wide thermal paper rolls only; custom label formats require external print server integration via serial output.
What safety features prevent over-travel or overload damage?
Hardware limit switches at upper and lower crosshead positions, combined with software-enforced load ceiling (configurable up to 105% of rated capacity), provide dual-layer mechanical and electronic protection.
Does Changchun Intelligent supply ISO/IEC 17025-compliant calibration certificates?
Factory calibration certificates compliant with ISO/IEC 17025 are available upon request and include uncertainty budgets, environmental conditions, and technician accreditation details.