WSM-100N Universal Electromechanical Testing Machine
| Origin | Jilin, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (PRC) |
| Max Load Capacity | 100 N |
| Force Range | 4–100 N |
| Force Accuracy | ±1% of reading |
| Displacement Accuracy | ±0.2% of reading |
| Crosshead Speed Range | 1–100 mm/min |
| Speed Accuracy | ±1% |
| Maximum Crosshead Travel | 600 mm |
| Effective Test Width | 430 mm |
| Compression Limit for Carbon Brushes | ≤40 mm |
| Typical Contact Load in Rail Grounding Applications | ≤400 N |
| Compliance | ASTM E4, ISO 7500-1, GB/T 228.1–2021 |
Overview
The WSM-100N Universal Electromechanical Testing Machine is a precision-controlled, micro-force-capable testing system engineered for static mechanical characterization of low-load components in rail transport grounding systems. It operates on the principle of controlled uniaxial compression and quasi-static force-displacement measurement, utilizing a servo-motor-driven crosshead and high-resolution load cell feedback to deliver traceable, repeatable results in accordance with international calibration standards. Designed specifically for evaluating spring-carbon brush assemblies used in railway grounding bodies, the system supports full-cycle pressure curve acquisition—including preload, linear elastic region, yield onset, and relaxation behavior—within a defined displacement envelope (≤40 mm). Its architecture adheres to fundamental metrological requirements outlined in ISO 7500-1 (static calibration of force-proving instruments) and ASTM E4 (practices for verification of force-measuring instruments), ensuring data integrity across laboratory, QC, and third-party validation environments.
Key Features
- Micro-force testing capability with selectable load range (4–100 N), optimized for delicate grounding interface components such as carbon brushes and miniature coil springs.
- High-fidelity displacement resolution supporting compliance with GB/T 228.1–2021 Annex G for low-force tensile/compression testing protocols.
- Programmable crosshead speed control (1–100 mm/min) with closed-loop velocity regulation and ±1% accuracy over full range.
- Dedicated fixturing suite—including custom-designed grounding-body mounting plates and spring alignment jigs—ensures reproducible specimen positioning and eliminates parasitic bending moments.
- Integrated real-time data acquisition engine synchronizes load, displacement, and time at ≥100 Hz sampling rate, enabling accurate hysteresis loop reconstruction during cyclic loading.
- Automated test sequence execution with pre-defined stop conditions (e.g., displacement limit, force threshold, or time duration), reducing operator dependency and inter-test variability.
Sample Compatibility & Compliance
The WSM-100N accommodates specimens up to 430 mm wide and 600 mm vertical travel depth, making it suitable for assembled grounding modules from CRRC Qingdao Sifang and Wuxi Wanli. It supports standardized test configurations per IEC 62305-3 (lightning protection of structures) and EN 50122-1 (railway applications – earthing of electric traction systems), particularly where mechanical stability of grounding interfaces under thermal cycling or vibration-induced creep must be quantified. All force measurements are traceable to national metrology institutes via factory calibration certificates compliant with ISO/IEC 17025 requirements. The system meets essential safety and electromagnetic compatibility criteria per CE marking directives (2014/30/EU and 2014/35/EU).
Software & Data Management
The embedded control software provides intuitive test method configuration, real-time graphical monitoring, and automated report generation in PDF and CSV formats. Users define pass/fail criteria based on reference parameters (e.g., minimum spring force at 30 mm compression, maximum allowable relaxation after 60 s dwell), and the system flags deviations during post-test analysis. Audit trails record user actions, calibration events, and parameter modifications in accordance with GLP principles. Raw datasets include timestamped metadata (operator ID, environmental temperature/humidity if externally logged), facilitating FDA 21 CFR Part 11–compliant implementation when integrated with validated LIMS platforms.
Applications
- Mechanical validation of carbon brush-spring assemblies in rail vehicle grounding bodies under simulated service compression profiles.
- Characterization of load-deflection behavior for helical compression springs used in electrostatic discharge (ESD) mitigation systems.
- Verification of contact force retention in grounding interfaces following thermal aging or mechanical fatigue exposure.
- Supporting R&D efforts in developing next-generation low-resistance grounding solutions compliant with UIC 801-1 and TB/T 3498–2018 specifications.
- Quality assurance testing for suppliers delivering grounding components to Tier-1 rail OEMs and infrastructure operators.
FAQ
What is the recommended calibration interval for the WSM-100N?
Calibration should be performed annually or prior to critical qualification testing, in accordance with ISO/IEC 17025 and internal QA procedures.
Can the system export raw data for third-party statistical analysis?
Yes—time-stamped force/displacement/time arrays are exported in ASCII-delimited format compatible with MATLAB, Python (NumPy/Pandas), and Minitab.
Is the machine compatible with environmental chambers?
The base unit supports integration with external temperature-humidity chambers via analog I/O and digital trigger signals; chamber-specific mounting adapters are available upon request.
Does the software support multi-language UI localization?
The current release includes English and Simplified Chinese language packs; additional languages require firmware update coordination with technical support.
What documentation is provided with delivery?
Each unit ships with Factory Calibration Certificate (traceable to CNAS-accredited lab), Installation Qualification (IQ) checklist, User Manual (EN/zh-CN), and Declaration of Conformity (CE).
