ÖNORM EN ISO 7096

This document specifies, in accordance with ISO 10326-1:2016, a laboratory method for measuring and evaluating the effectiveness of the seat suspension in reducing the vertical whole-body vibration transmitted to the operator of earth-moving machines at frequencies between 1 Hz and 20 Hz. It also specifies acceptance criteria for application to seats on different machines. This document is applicable to operator seats used on earth-moving machines as defined in ISO 6165. This document defines the input spectral classes required for the following earth-moving machines. Each class defines a group of machines having similar vibration characteristics: — rigid-frame dumpers >4 500 kg operating mass; — articulated-frame dumpers; — scrapers without axle or frame suspension; — wheeled loaders >4 500 kg operating mass; — graders; — wheeled dozers; — soil compactors; — backhoe loaders; — crawler dumpers; — crawler loaders; — crawler-dozers less than or equal to 50 000 kg operating mass; — compact dumpers less than or equal to 4 500 kg operating mass; — wheeled compact loaders less than or equal to 4 500 kg operating mass; — skid-steer loaders, wheeled less than or equal to 4 500 kg and tracked less than or equal to 6 000 kg operating mass. The following machines impart sufficiently low vertical vibration inputs at frequencies between 1 Hz and 20 Hz to the seat during operation that these seats do not require suspension for the attenuation of transmitted vibration: — excavators, including walking excavators and cable excavators; — trenchers; — landfill compactors; — non-vibratory rollers, except soil compactors; — vibratory rollers, except soil compactors; — pipelayers; — horizontal directional drills (HDD). The tests and criteria defined in this document are intended for operator seats used in earth-moving machines of conventional design. Vibration which reaches the operator other than through the seat, for example that sensed by the operator’s feet on the platform or control pedals or by the operator´s hands on the steering-wheel, is not covered.