To start whole-body vibration measurement for the assessment of health risks open
the main menu by pressing F3, and select “Measuring mode” / “Human vibration” /
“Whole-body ISO 2631” / “Health”. From this menu you will return to the measur-
ing screen (Figure 14). You may press F1 to check your settings.
According to ISO 2631-1 there are two evaluation methods for whole body vibra-
tion: basic evaluation and additional evaluation. Basic evaluation is performed by
interval RMS measurement. Additional evaluation can be the running RMS method
(MTVV) or the fourth power vibration dose method (VDV) whereupon the latter is
more common. One of the two additional evaluation methods should be applied for
occasional shocks or transient vibration since the basic evaluation methods may un-
derestimate their effects. A measure for the shock content of vibration is the crest
16
Figure 20: Whole-body weighting filter Wm for persons in buildings
0,1
1
10
100
1000
0,0001
0,001
0,01
0,1
1
10
Wm min ISO 8041
Wm max ISO 8041
Wm VM31
Hz
Figure 19: Whole-body weighting filter Wj for the head of recumbent persons
0,1
1
10
100
1000
0,0001
0,001
0,01
0,1
1
10
Wj min ISO 8041
Wj max ISO 8041
Wj VM31
Hz
