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



Occupational medicine

VM-HAND is applied for measuring human hand-arm vibrations. Hand-arm vibrations are caused by vibrations or shocks which are transmitted by tools, machines and vehicles in the workplace via inner hand and fingers. If a person is exposed to strong hand-arm vibrations, safety and health are endangered and there is an increasing risk of bone, joint and muscle diseases.
The "vibration directiveā€¯ (directive 2002/44/EC) defines minimum requirements for the protection against risks arising from hand-arm vibrations.
The measurements are based on the international standards ISO 5349 and ISO 8041.

Identify causes

VM-HAND+ offers as additional feature a frequency analysis of the weighted and unweighted vibration signal. This can help to find the source of vibration and to change the design of the tested equipment accordingly.