WG 12 - CEN/TC 231/WG 12

This document specifies the requirements for declaration and verification of vibration emission values of continuous and repeated shock vibrations. It is applicable to hand-arm and whole-body vibration values achieved by measurements according to type-B and type-C standards for portable hand-held, hand-guided and mobile machinery.
This document
—   gives guidance on the declaration of vibration emission values,
—   describes vibration and product information to be given in the instructions for use supplied with the machinery, and
—   specifies the method for verifying the declared vibration emission values stated in the instruction for use of the machinery.
NOTE   Machines according to Machinery Regulation (EU) 2023/1230 Annex III Part B 2.2.1.1 and 3.6.3.1 are covered by this document.

This document specifies the determination of whole-body and hand-arm vibration emissions at
operator position(s) during testing of mobile machinery. The purpose of this document is to
assist technical standardization committees responsible for specific types of machinery in
preparing vibration test codes to ensure that such vibration test codes
— are as homogeneous as possible with each individual test code having the same basic
structure,
— are in full accordance with basic standards on measurement of vibration emission,
— reflect the latest technical knowledge of methods of determining the vibration emission
from the specific family of machinery under consideration,
— provide manufacturers with a standardized method for the determination and declaration
of the vibration emission value(s) of their machinery,
— enable the user of the machinery or the member of an inspection body to compare the
vibration emission values of different machinery and to verify the vibration emission
values provided by the manufacturer.
This document provides requirements for the preparation of vibration test codes (C-type
standards), including guidelines for the conditions under which the measurements shall be made
(e.g. operating conditions). Information to be included in a typical vibration test code is
summarized in Annex A.
This document applies to sitting and standing positions. It is applicable to all mobile machinery
producing periodic or random vibration with or without transients.
This document contains sufficient guidance for designing an appropriate test for machinery for
which no vibration test codes exist. It can also be used for the determination of vibration
emission values of individual machines.
This document is not applicable to rotational vibration and backrest vibration.
This document does not present limits or recommended vibration values.