SUNS YAW-600-WJ Electro-Hydraulic Servo Compression Testing Machine with Extended Test Zone

Overview

The SUNS YAW-600-WJ is an electro-hydraulic servo-controlled compression testing machine engineered for high-accuracy mechanical characterization of large-scale civil engineering specimens under uniaxial compressive loading. Designed around a rigid four-column frame architecture with electrically driven screw-adjustable platens, it delivers precise force regulation and stable displacement control in extended vertical test zones—specifically optimized for standardized and non-standardized compression tests on cement-stabilized base materials, asphalt mixtures, concrete cylinders, geosynthetic-reinforced soil blocks, and other infrastructure-grade composites. Its closed-loop hydraulic actuation system operates on the principle of proportional servo-valve-controlled oil flow, enabling true stress-rate and load-hold modes compliant with quasi-static mechanical testing protocols defined in ASTM C39/C109, ISO 7500-1 (Class 0.5), GB/T 2611, and EN 12390-3.

Key Features

• Electro-hydraulic servo system with imported high-response proportional servo valve, ensuring dynamic force control accuracy ≤ ±0.5% of full scale and repeatability better than 0.3% FS over repeated cycles.
• Load cell-based force measurement system calibrated to ISO 376 Class A, offering full-scale resolution of 1/500,000 and linearity error < ±0.02% FS across 1–100% FS range without range switching.
• Extended platen separation (450 mm) and oversized platen surface (620 mm × 500 mm) accommodate tall or wide-format specimens—ideal for layered pavement cores, full-depth stabilized soil columns, and pre-cast structural elements.
• Low-noise, high-efficiency axial piston pump with air-cooled heat exchanger enables uninterrupted operation during multi-hour durability or creep-compression tests under ambient laboratory conditions.
• Motorized platen height adjustment via precision ball-screw drive ensures repeatable positioning within ±0.02 mm, eliminating manual jacking and reducing setup variability between test series.
• Modular expansion capability: up to four independent displacement or strain measurement channels (LVDT, extensometer, or digital image correlation interface) can be integrated via standardized analog/digital I/O ports.

Sample Compatibility & Compliance

The YAW-600-WJ supports specimen geometries up to Ø330 mm diameter or 620 mm × 500 mm rectangular cross-sections, with maximum heights of 450 mm. It is routinely deployed for testing according to GB/T 50152 (standard for testing methods of concrete structures), JTGE51 (test specifications for highway engineering inorganic binders), ASTM D1633 (compressive strength of stabilized soils), and ISO 10126-2 (geotextile-reinforced soil systems). Its 0.5-class accuracy certification per ISO 7500-1 satisfies GLP-compliant data acquisition requirements for third-party certification labs and government road authority QA/QC divisions. All firmware and control logic are traceable and audit-ready for ISO/IEC 17025-accredited laboratories.

Software & Data Management

Control and analysis are executed via SUNS’ proprietary TestMaster v5.2 software suite, running on Windows 10 IoT Enterprise. The platform supports real-time dual-axis plotting (force vs. displacement, stress vs. strain), automatic yield point detection using tangent modulus and offset methods, and export of raw ASCII time-series data with microsecond timestamping. All test configurations, calibration records, operator logs, and electronic signatures are stored in encrypted SQLite databases with built-in revision history. Software complies with FDA 21 CFR Part 11 requirements for audit trails, role-based access control, and electronic record integrity—enabling seamless integration into LIMS environments used by transportation departments and construction material certification bodies.

Applications

• Compressive strength evaluation of cement-treated base (CTB), lime-fly ash stabilized subgrade, and roller-compacted concrete (RCC) per AASHTO T 193 and JTG E51.
• Mechanical performance validation of prefabricated modular bridge abutments and retaining wall panels under sustained loading.
• Creep and relaxation behavior analysis of polymer-modified asphalt binders and fiber-reinforced bituminous mixtures.
• Structural integrity verification of full-scale railway sleepers and tunnel segment joints under static and cyclic compression.
• Calibration reference testing for field-deployed portable compression testers used in rapid pavement assessment programs.

FAQ

What standards does the YAW-600-WJ comply with for force measurement accuracy?
It meets ISO 7500-1 Class 0.5 requirements, verified annually using NIST-traceable deadweight standards and documented in its Certificate of Calibration.
Can the machine perform load-hold or stress-rate controlled tests?
Yes—it supports constant stress rate (MPa/min), constant load ramping (%FS/s), and dwell-hold modes with programmable dwell duration and tolerance bands.
Is remote monitoring or integration with a central lab network possible?
TestMaster v5.2 includes OPC UA server support and RESTful API endpoints for bidirectional communication with enterprise MES or SCADA systems.
What maintenance intervals are recommended for continuous operation?
Hydraulic oil filtration and servo valve inspection are scheduled every 1,500 operating hours; annual recalibration of load cell and displacement transducers is required for ISO/IEC 17025 compliance.
Does the system support automated reporting generation?
Yes—customizable PDF/Excel reports with embedded graphs, pass/fail flags against specification limits, and digital signature fields are generated post-test with configurable templates.