MMF VM30-H, Инструкция по эксплуатации, Страница: 23 / 58

9. Signal Setup
9.1. Vibration Quantity
Press the ▲ (RANGE) key to display the vibration quantity menu. The following vibration
quantities can be selected using the ▲▼ keys:
•
Human vibration with the corresponding weighting filters to ISO 8041
•
Vibration acceleration
•
Vibration velocity, integrated acceleration signal
•
Vibration displacement, double integrated acceleration signal
9.2. Filters
The filter menu appears after a vibration quantity has been selected. The VM30-H provides a set
of band-pass or weighting filters for each vibration quantity mode. The weighting filters for
human vibration conform to ISO 8041 and cover most applications in this field.
9.2.1. Weighting Filters
The weighting filters W
b
, W
c
, W
d
, W
e
, W
g
, W
h
, W
j
, W
k
and W
m
to are only available if the
selected vibration quantity is human vibration. They are implemented as IIR digital filters which
guarantees high accuracy and stability.
9.2.1.1. Weighting Filter W
b
The weighting filter W
b
, which is similar to the filter W
k
, is intended for measuring whole-body
vibration in fixed-guideway transport systems in seated, standing or recumbent position to the
standard ISO 2631-4.
Figure 11: Weighting filter W
b
18
0,01
0,10
1,00
10,00
1 10 100 1000
Hz