North Guang Precision Instruments BWN-300KN Desktop Microcomputer-Controlled Electromechanical Universal Testing Machine
| Brand | North Guang Precision Instruments |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Model | BWN-300KN |
| Instrument Type | Electromechanical Universal Testing Machine |
| Max. Test Force | 300 kN (30 metric tons) |
| Accuracy Class | ISO 7500-1 / ASTM E4 Class 0.5 |
| Force Measurement Range | 2–100% FS |
| Force Resolution | 1/300,000 FS |
| Force Indication Error | ±1% of reading |
| Displacement Resolution | 0.001 mm |
| Displacement Error | ±0.5% of reading |
| Crosshead Speed Range | 0.001–500 mm/min |
| Speed Accuracy | ±1% of set value |
| Effective Test Width | 450 mm |
| Effective Tensile Travel | 550 mm |
| Dimensions (W×D×H) | 850 × 450 × 1820 mm |
| Control System | SOC-based embedded controller with triple-closed-loop (force, displacement, strain) digital control |
| Data Acquisition | 4-channel 24-bit A/D, 300 Hz sampling rate, dual 5 MHz encoder inputs |
| Interface | 10 Mbps Ethernet |
| Compliance | CNAS-calibrated per GB/T 228.1–2021, ISO 6892-1, ASTM E8/E21, and certified for GLP-aligned data integrity |
Overview
The North Guang Precision Instruments BWN-300KN is a benchtop electromechanical universal testing machine engineered for high-fidelity mechanical property characterization of metallic materials under static loading conditions. It operates on the principle of controlled uniaxial force application—using a precision servo-driven crosshead system—to measure tensile strength, yield strength, elongation at break, modulus of elasticity, compressive strength, flexural properties, and shear response in accordance with internationally recognized standards. Its rigid four-column guidance architecture, combined with graphite self-lubricating linear bushings and hardened ground guide rods, ensures minimal lateral deflection and exceptional axial alignment throughout the full stroke. This structural integrity directly supports measurement repeatability and traceability—critical requirements for metallurgical QA/QC labs, third-party certification bodies, and R&D facilities conducting material qualification per aerospace (AMS), automotive (SAE J429), or energy-sector specifications.
Key Features
- High-stiffness frame with four precision-ground chrome-plated guide rods and self-lubricating graphite bushings, delivering <0.02 mm lateral runout over 550 mm travel
- Panasonic AC servo motor coupled to preloaded recirculating ball screw assembly, enabling smooth, backlash-free motion across the full speed range (0.001–500 mm/min)
- Imported high-accuracy load cell (Transducer Techniques or Celtron grade) with thermal compensation and long-term stability ≤±0.05% FS/year
- Triple-closed-loop digital control system based on SOC microprocessor platform—simultaneously regulating force, displacement, and strain with adaptive neural-network PID algorithms
- 24-bit analog-to-digital conversion with real-time digital filtering, achieving effective noise suppression and signal-to-noise ratio >100 dB
- 10 Mbps Ethernet interface supporting deterministic data streaming to external DAQ systems or centralized lab networks
- Compliance-ready firmware architecture supporting audit trails, user access levels, electronic signatures, and 21 CFR Part 11–compatible metadata logging
Sample Compatibility & Compliance
The BWN-300KN accommodates standardized metallic specimens—including round bars (up to Ø32 mm), flat coupons (up to 40 mm wide × 10 mm thick), weldments, fasteners, and sheet metal—via interchangeable wedge-action, pneumatic, or hydraulic grips. Custom fixture integration is supported through ISO 18752-compliant mounting interfaces. The system conforms to ISO 7500-1:2018 (static calibration), ISO 6892-1:2019 (tensile testing of metals), ASTM E8/E8M, ASTM E21, EN 10002-1, and GB/T 228.1–2021. All force transducers are independently calibrated by CNAS-accredited laboratories (Certificate No. CNAS LXXXXX), with as-delivered uncertainty budgets traceable to NIM (National Institute of Metrology, China). The mechanical design satisfies CE machinery directive requirements (2006/42/EC) and includes integrated emergency stop circuits compliant with IEC 60204-1.
Software & Data Management
The bundled PC-based testing software provides a dual-mode interface: a wizard-driven workflow for routine QC tasks (e.g., batch tensile tests per ASTM E8) and a scriptable environment for advanced protocol development (e.g., multi-step cyclic loading, creep hold sequences). All test configurations—including ramp rates, dwell times, trigger conditions, and pass/fail logic—are stored as XML-based method files with version control and digital signature support. Raw data streams (force, displacement, extensometer output) are saved in HDF5 format with embedded metadata (operator ID, timestamp, environmental conditions, calibration IDs). Reporting modules generate PDF/Excel outputs compliant with ISO/IEC 17025 documentation requirements, including automatic calculation of Rp0.2, Rm, A5, n-value, and r-value per EN ISO 10113. Audit logs record all user actions, parameter modifications, and calibration events with immutable timestamps.
Applications
- Mechanical validation of hot-rolled, cold-drawn, and heat-treated steels (carbon, alloy, stainless), aluminum alloys (e.g., 6061-T6, 7075-T73), titanium grades (Ti-6Al-4V), and nickel-based superalloys
- Quality conformance testing for ASTM A370, ASTM A615, ISO 6892-2 (high strain rate), and ISO 15630-1 (reinforcing steel)
- Research-grade stress–strain curve derivation with optional video extensometry or clip-on axial/transverse extensometers
- Compression testing of cast iron, sintered metals, and powder metallurgy compacts per ASTM E9
- Bending evaluation of structural profiles and welded joints per ISO 7438 and ASTM E290
- Shear strength assessment of rivets, bolts, and adhesive bonds using specialized fixtures
FAQ
What international standards does the BWN-300KN comply with for metallic material testing?
It meets ISO 6892-1, ASTM E8/E21, EN 10002-1, GB/T 228.1, and ISO 7500-1 calibration requirements—with CNAS-certified load cell calibration certificates provided with each unit.
Is the system compatible with external extensometers or environmental chambers?
Yes—two 5 MHz quadrature encoder channels support third-party clip-on or non-contact extensometers; the 10 Mbps Ethernet interface enables synchronized control of temperature chambers (e.g., −70°C to +300°C) via Modbus TCP or custom API integration.
How is data integrity ensured for regulated environments (e.g., ISO 17025, FDA-regulated labs)?
The controller firmware implements role-based access control, electronic signatures, tamper-evident audit logs, and HDF5-formatted raw data with embedded calibration metadata—fully aligned with 21 CFR Part 11 and ISO/IEC 17025 clause 7.7 requirements.
What maintenance intervals and service support are offered outside the warranty period?
North Guang Precision Instruments provides lifetime technical support, with annual preventive maintenance kits and certified field engineer dispatch available globally; spare parts carry 24-month shelf-life guarantees and are stocked in regional depots across APAC, EMEA, and North America.
