Extech Instruments 407850, Руководство пользователя

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Model 407850 Version 1.2 December 2005 6
Appendix: Machinery Classification
When evaluating machinery and equipment it is useful to know their classification range
and group type. There are four machine groups and classification ranges recognized
internationally. The limits for vibration severity (mm/s) are shown in the Tables below:
GROUP K – Small Machinery up to 15KW (for example, production motors)
Testing Status Vibration Severity (mm/s)
Good 0 to 0.71
Acceptable 0.72 to 1.80
Permissible 1.81 to 4.5
Dangerous Greater than 4.5
GROUP M – Medium-sized Machinery up to 75KW (for example, motors without
special foundations)
Testing Status Vibration Severity (mm/s)
Good 0.00 to 1.12
Acceptable 1.13 to 2.80
Permissible 2.81 to 7.10
Dangerous Greater than 7.10
GROUP G – Large Machinery on Heavy Foundations
Testing Status Vibration Severity (mm/s)
Good 0.00 to 1.80
Acceptable 1.81 to 4.50
Permissible 4.51 to 11.20
Dangerous Greater than 11.20
GROUP T – Large Turbo Machinery on Special Foundations
Testing Status Vibration Severity (mm/s)
Good 0 to 2.80
Acceptable 2.81 to 7.10
Permissible 7.11 to 18.00
Dangerous Greater than 18.00
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