WANCE DIT-Series A Type Drop Weight Impact Tester

Overview

The WANCE DIT-Series A Type Drop Weight Impact Tester is a fully automated mechanical impact testing system engineered for precise evaluation of the Charpy-style or instrumented drop-weight impact resistance of non-metallic structural materials. It operates on the fundamental principle of gravitational potential energy conversion: a calibrated mass (hammer) is elevated to a defined height and released under controlled free-fall conditions to strike a standardized specimen. The resulting fracture behavior—whether yielding, ductile tearing, brittle cleavage, or partial penetration—is quantified through energy absorption calculations derived from pre-impact height and post-impact rebound analysis (where applicable). This methodology conforms to internationally recognized test standards including ASTM D256 (Notched Izod), ISO 179-1 (Charpy unnotched/notched), ISO 8256 (Tensile Impact), and Chinese national standards GB/T 14152 (PVC/PE pipe impact) and GB/T 1043.1 (rigid plastics). The system is purpose-built for quality control laboratories, R&D centers, and certification bodies requiring repeatable, traceable, and operator-independent impact performance data across thermoplastics, thermosets, fiber-reinforced composites, ceramics, and construction-grade polymers.

Key Features

• Fully automated operational sequence: auto-zeroing of specimen position, motorized test table height adjustment, automatic hammer lifting to user-defined height, real-time door interlock verification, and post-impact hammer capture.
• Anti-secondary-impact mechanism prevents erroneous energy readings caused by specimen rebound-induced re-strike—a critical requirement for compliant execution of ISO 179-1 Annex E and ASTM D3763.
• High-precision vertical guidance using hardened, ground linear rods ensures minimal aerodynamic drag and lateral deviation during free fall, contributing to measurement reproducibility (CV < 2% per ISO 179-2).
• Siemens S7-series PLC core controller with integrated 3-channel quadrature optical encoder system (5 MHz max pulse frequency) enables sub-millimeter positional resolution and real-time velocity profiling throughout the drop cycle.
• Induction-braking servo motor coupled with high-tensile roller chain drive delivers smooth, vibration-damped lifting motion with long-term dimensional stability and low maintenance requirements.
• Embedded touch interface displays live parameters—including set drop height, nominal impact energy, calculated impact velocity, and system status—and supports password-protected parameter locking for GLP/GMP environments.

Sample Compatibility & Compliance

The DIT-Series A accommodates flat sheet specimens (up to 200 mm × 200 mm) and cylindrical pipe segments (diameters ranging from 20 mm to 630 mm, depending on selected configuration). Standardized hammer geometries (D25/SR50, D90/SR50, and six additional interchangeable head profiles) allow adaptation to ASTM D256, ISO 179, ISO 8256, and GB/T 1043.1 specimen fixtures. All configurations meet CE machinery directive requirements and incorporate dual-channel safety circuitry compliant with EN ISO 13857 (safe distances) and EN 60204-1 (electrical equipment of machines). The system architecture supports audit-ready operation under FDA 21 CFR Part 11 when paired with optional electronic signature and event-log modules.

Software & Data Management

While the base unit operates via embedded HMI, optional PC-based software (WANCE IMPACT Suite v4.x) provides extended functionality: automated report generation (PDF/Excel), multi-test statistical trending (mean, SD, confidence intervals), raw encoder waveform export (CSV), and calibration certificate management. All test records include timestamp, operator ID, environmental metadata (optional temperature/humidity input), and full audit trail—enabling alignment with ISO/IEC 17025 clause 7.7 and internal QA documentation systems.

Applications

• Quality assurance of extruded PVC, HDPE, and PP pipes in municipal infrastructure projects.
• Evaluation of impact-modified polypropylene automotive interior components under low-temperature (-20°C to +23°C) conditioning.
• Comparative study of UV-degraded vs. virgin polymer sheets for building cladding applications.
• Validation of ceramic tile fracture toughness per EN 14411 Annex G.
• Research into nanocomposite toughening mechanisms using instrumented impact data correlation with SEM fractography.

FAQ

What standards does this tester support out-of-the-box?
ASTM D256, ISO 179-1, ISO 8256, GB/T 14152, and GB/T 1043.1 — with optional firmware updates enabling future protocol integration.
Is calibration traceability provided with delivery?
Yes — each unit ships with a factory calibration certificate traceable to NIM (China National Institute of Metrology) for height measurement and certified mass values.
Can the system be integrated into a LIMS environment?
Via optional RS-232/RS-485 or Ethernet TCP/IP interface; API documentation and HL7-compatible data schema available upon request.
What is the maximum certified drop height accuracy?
±0.2 mm over full 2000 mm range, verified per ISO 179-2 Annex B using laser interferometry.
Are spare hammers and calibration weights supplied as standard?
D25 and D90 hammers plus 50 g–3500 g weight set are recommended accessories but quoted separately; no consumables are included in base system pricing.