EN ISO 7096:2020 PDF

Overview

EN ISO 7096:2020 (ISO 7096:2020) specifies a laboratory method to measure and evaluate how effectively an operator seat suspension reduces vertical whole‑body vibration transmitted to operators of earth‑moving machinery at frequencies between 1 Hz and 20 Hz. Aligned with ISO 10326‑1:2016, the standard defines input spectral classes for groups of machines, acceptance criteria for seat performance and reporting requirements. It is applicable to operator seats used on earth‑moving machines as defined in ISO 6165 and is intended primarily for seats of conventional machine designs.

Key topics and technical requirements

• Scope of measurement: Vertical whole‑body vibration transmitted through the seat (1–20 Hz). Vibrations transmitted via feet, pedals or hands are explicitly excluded.
• Laboratory test method: Simulation of representative vibration inputs using defined input spectral classes for machine groups (e.g., rigid‑frame and articulated dumpers, wheeled loaders, graders, dozers, compactors, backhoe loaders, crawler machines, compact and skid‑steer loaders).
• Machine categories: Specific machine classes are listed, including mass thresholds (for example machines >4 500 kg and compact machines ≤4 500 kg), and notes for special cases (e.g., scrapers with/without suspension, very large crawler dozers).
• Machines with low vertical input: Excavators, trenchers, landfill compactors, (vibratory and non‑vibratory) rollers, pipelayers and horizontal directional drills generally impart low vertical seat vibration and typically do not require seat suspension.
• Performance metrics:
  • SEAT factor - a metric for attenuation performance (defined and used for acceptance criteria).
  • Damping performance - including specific tests for passive and for active/semi‑active seat suspensions.
• Test conditions: Requirements for test seat preparation, run‑in, seat adjustment, test person posture and mass ranges, tolerances on input vibration and required report contents (seat identification and test report information).

Applications and users

EN ISO 7096:2020 is used to:

• Qualify and compare operator seats and suspension systems in laboratory settings.
• Support seat design, procurement and validation for earth‑moving machinery.
• Provide objective data for machine manufacturers, seat suppliers, testing laboratories and certification bodies.
• Support compliance and safety assessments by regulators, health & safety organizations and employers.

Typical users include:

• Machine and seat manufacturers
• Test laboratories and R&D teams
• Regulatory and conformity assessment bodies
• Fleet managers and occupational health professionals

Related standards and regulatory context

• ISO 10326‑1:2016 (laboratory simulation of vehicle seat vibration) - normative reference.
• ISO 6165 (classification of earth‑moving machinery) - defines applicable machine types.
• EN ISO 7096:2020 includes an informative Annex ZA relating to Directive 2006/42/EC (Machinery Directive) for conformity assessment.

Keywords: EN ISO 7096:2020, ISO 7096:2020, earth‑moving machinery, operator seat vibration, seat suspension, laboratory evaluation, whole‑body vibration, SEAT factor, damping performance.