ÖNORM EN ISO 7096

1.1 This International Standard specifies, in accordance with ISO 10326-1, 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. 1.2 This International Standard is applicable to operator seats used on earth-moving machines as defined in ISO 6165. 1.3 This International Standard 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 mass1 articulated frame dumpers scrapers without axle or frame suspension2 wheel-loaders > 4 500 kg operating mass1) graders wheel-dozers soil compactors (wheel type) backhoe-loaders crawler loaders crawler-dozers u 50 000 kg operating mass1), 3 compact dumpers u 4 500 kg operating mass1) compact loaders u 4 500 kg operating mass1) skid-steer loaders u 4 500 kg operating mass1) 1 See ISO 6016. 2 For tractor scrapers with suspension, either a seat with no suspension may be used, or one having a suspension with high damping. 3 For crawler dozers greater than 50 000 kg, the seat performance requirements are suitably provided by a cushion type seat.