VOLTCRAFT VBM-100 Bedienungsanleitung Seite 32

Reference values
ISO 2372 and VDI 2056 distinguish between 4 classes for the evaluation of machines and equipment.
Vibration limits (in mm/s) are specified in these classes.
The classification is as follows:
Group K
Group M
Group G
Group T
Good
Acceptable
Still tolerable
Hazardous
Relative deviation to reference ISO 2954 (80 Hz)
The following measuring errors deviating from the reference frequency of 80 Hz may occur.
Frequency
10 Hz
20 Hz
40 Hz
80 Hz
160 Hz
500 Hz
1 kHz
Small machines with electric motors of up to 15 kW.
Middle-sized machines with electric motors >15 kW to 75 kW, without special base
Huge machines with heavy base
High-performance machines with special base
Group K
0 - 0.71 mm/s
0.72 - 1.8 mm/s
1.81 - 4.5 mm/s
> 4.5 mm/s
Standard value
1,0
1,0
1,0
1,0
1,0
1,0
1,0
Group M Group G
0 - 1.12 mm/s 0 - 1.8 mm/s
1.13 - 2.8 mm/s 1.81 - 4.5 mm/s
2.81 - 7.1 mm/s 4.51 - 11.2 mm/s
> 7.1 mm/s > 11.2 mm/s
Minimum value
0,8
0,9
0,9
1,0
0,9
0,9
0,8
Group T
0 - 2.8 mm/s
2.8 - 7.10 mm/s
7.11 - 18 mm/s
> 18 mm/s
Relative deviation
Maximum value
1,1
1,1
1,1
1,0
1,1
1,1
1,1
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