MRC PVB-820, Operation Manual

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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
9. 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
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