Manfred Weber
Metra Mess- und Frequenztechnik in Radebeul e.K.
PC Vibration Measurement System VibroMetra



Occupational medicine

VM-BODY is applied for measuring human whole-body vibrations. Whole-body vibrations are caused by vibrations or shocks which are transmitted by machines and vehicles in the workplace via seat or feet. If a person is exposed to strong whole-body vibrations, safety and health are endangered and it is proven that backache can be provoked or aggravated.
The "vibration directiveā€¯ (directive 2002/44/EC) defines minimum requirements for the protection against risks arising from whole-body vibrations.


The measurement modes are based on the international standard ISO 2631. This standard not only covers whole-body vibrations from a medical view, but also comfort assessments, e.g. for passengers in rail vehicles (trains, underground railway, etc.). Thus, the comfort of a person during the transport can be assessed objectively and according to an internationally accepted method.

Identify causes

As an extra measurement mode, the identification of transmission characteristics of seats (SEAT value) is available in VM-BODY+. For each measurement, the Pro version additionally offers an analysis in frequency domain - for both, the unweighted signal and also with weighting filters. This way, causes (e.g. structural ones) which contribute to the total vibration value most are detected quickly.

Supported standards

VM-BODY offers 21 different measurement modes, based on
  •  2002/44/EC
  •  ISO 2631-1:1997 (whole-body vibration) health assessment
  •  ISO 2631-1:1997 (whole-body vibration) comfort assessment
  •  ISO 2631-2:2003 (vibration in buildings) comfort assessment
  •  ISO 2631-4:2001 (rail vehicles) comfort assessment