JB-Brookfield JB-117D Safety Harness Tensile Testing Machine

Overview

The JB-Brookfield JB-117D Safety Harness Tensile Testing Machine is a precision-engineered electromechanical universal testing system designed specifically for static and quasi-static tensile evaluation of personal protective equipment (PPE), with primary application in the mechanical validation of fall arrest safety harnesses, lanyards, webbing, and anchorage connectors. Built upon a dual-space aluminum-framed architecture, the machine employs an AC servo motor drive system coupled with high-fidelity digital signal conditioning—enabling closed-loop control of load, displacement, and strain rate per ISO 5893 and ASTM E4 standards. Its force transduction system utilizes a calibrated S-type load cell conforming to ISO 7500-1 Class 0.5 accuracy requirements, ensuring traceable measurement integrity across the full 0.4–20 kN operational range. The system meets the mandatory test protocols defined in GB/T 6096–2009 (Chinese national standard for safety harnesses) and aligns with functional equivalency to EN 361, ANSI Z359.1, and OSHA 1926 Subpart M requirements for structural integrity verification under controlled loading conditions.

Key Features

• Dual-zone test frame with rigid aluminum extrusion housing—optimized for torsional stability during high-force tension cycles up to 20 kN
• AC servo motor + precision ball-screw actuation system delivering programmable crosshead speeds from 0.01 to 500 mm/min with ±0.2% speed regulation accuracy
• Integrated digital controller featuring real-time PID tuning, overload protection, and emergency stop interlock compliant with IEC 61800-5-2
• High-resolution displacement sensing (0.01 mm resolution) via non-contact linear encoder, eliminating mechanical backlash errors
• Modular fixture interface supporting standardized PPE clamping geometries—including dedicated harness webbing grips with serrated jaw surfaces and low-slip surface treatment
• Full compliance with GB/T 6096–2009 Annex B test sequences: static load hold (15 min @ 15 kN), dynamic drop simulation (via optional impact module integration), and elongation measurement at specified force thresholds

Sample Compatibility & Compliance

The JB-117D accommodates flat textile webbing (width ≤ 80 mm), stitched loop assemblies, metal D-rings, energy-absorbing lanyards, and hybrid composite anchor points. Specimen mounting follows standardized gauge lengths per GB/T 6096–2009 Section 6.2 and ISO 13934-1 for tensile strength assessment. All test routines are preconfigured to satisfy regulatory audit trails required under China NMPA Class II PPE registration and support GLP-compliant documentation when paired with validated software. System-level calibration certificates are issued traceable to CNAS-accredited reference standards (GB/T 16825.1–2008 / ISO 7500-1), and mechanical safety conforms to GB/T 2611–2013 general requirements for testing machines.

Software & Data Management

Equipped with JB-TestSuite v3.2 software, the system provides automated test sequencing, real-time curve plotting (load vs. displacement, stress vs. strain), and export-ready reporting in PDF, CSV, and XML formats. Software modules include configurable pass/fail logic per GB/T 6096–2009 acceptance criteria (e.g., maximum permanent deformation ≤ 5 mm after 15 kN hold), statistical batch analysis (mean, SD, CV%), and electronic signature support aligned with FDA 21 CFR Part 11 Annex 11 principles. Audit trail logging records all parameter changes, operator IDs, calibration events, and test interruptions with timestamped immutable entries.

Applications

• Verification of static tensile strength and elongation behavior of Type I/II fall arrest harnesses per GB/T 6096–2009 Clause 7.3
• Validation of webbing seam integrity and stitching slippage resistance under ramped loading
• Mechanical qualification of energy absorbers and shock packs prior to field deployment
• Comparative fatigue pre-screening using stepped-load cycling protocols (non-destructive)
• Supporting ISO/IEC 17025 accredited laboratories in issuing test reports for CE marking and CCC certification submissions
• Material R&D for next-generation aramid/polyolefin hybrid webbing systems requiring modulus and yield point characterization

FAQ

Does the JB-117D comply with international PPE testing standards beyond Chinese national standards?

Yes—the machine’s force accuracy, displacement fidelity, and control repeatability meet the technical prerequisites for EN 361:2002, ANSI Z359.1–2016, and AS/NZS 1891.1:2020 test method execution when operated within defined procedural boundaries.
Can the system perform cyclic or fatigue testing on safety harness components?

While the base configuration supports static and quasi-static protocols, optional add-ons—including programmable load waveform generation and thermal environmental chamber integration—enable limited low-cycle fatigue evaluation per ISO 13934-2 Annex A guidelines.
Is third-party calibration documentation included with delivery?

Each unit ships with a factory-issued calibration certificate traceable to CNAS-accredited primary standards, covering force (0.4–20 kN), displacement (0–2000 mm), and speed (0.01–500 mm/min) channels.
What maintenance intervals are recommended for long-term metrological reliability?

Annual recalibration is advised per GB/T 16825.1–2008; routine verification using certified reference load cells and displacement gauges should be performed biweekly in active QA/QC environments.
Are custom fixtures available for non-standard harness configurations?

Yes—JB-Brookfield offers engineering consultation and bespoke fixture design services compliant with ISO 14855-1 mounting geometry specifications, subject to mechanical feasibility review.