Large machines on heavy foundations ( Group G )
Good
0 to 1.80 mm/s
Acceptable
1.81 to 4.50 mm/s
Still permissible
4.51 to 11.2 mm/s
Dangerous
> 11.2 mm/s
Largest machines and turbo machines with a
special foundations ( Group T ).
Good
0 to 2.80 mm/s
Acceptable
2.81 to 7.10 mm/s
Still permissible
7.11 to 18.0 mm/s
Dangerous
> 18 mm/s
13. SENSITIVITY RELATIVE to the
reference sensitivity at 80 Hz ,
according ISO 2954
Frequency Normal
Relative sensitivity
value
Minimum
Maximum
value
value
10 Hz 1.0
0.8
1.1
20 Hz 1.0
0.9
1.1
40 Hz 1.0
0.9
1.1
80 Hz 1.0
1.0
1.0
160 Hz 1.0
0.9
1.1
500 Hz 1.0
0.9
1.1
1000 Hz 1.0
0.8
1.1
Table 1
30
