![]() ![]() Publication as an International Standard. ![]() Class IV: Large rotating machines mounted on foundations which are flexible in the direction of vibration measurement. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Class III: Large rotating machines rigidly mounted on foundations which are stiff in the direction of vibration measurement. Class II: Medium size (15kW to 75kW) machines without special foundations, or machines up to 300kW rigidly mounted on special foundations. This is accomplished with overall vibration (ISO VIB) and envelope measurements. ISO 2372 – VIBRATION SEVERITY Vibration Severity Range Limits (Velocity) From ISO 2372 In/Sec (PK) MM/Sec (RMS) 0.015 0.28 0.025 0.45 0.039 0.71 0.062 1.12 0.099 1.80 0.154 2.80 0.248 4.50 0.392 7.10 0.617 11.2 0.993 18.0 1.540 28.0 2.480 45.0 3.940 71.0 Vibration Severity Ranges for Machines Belonging to: Class I 100 HP Class IV >100 HP A A A A (Good) B B C B B (Allowable) C C C (Tolerable) D D D D (Not Permissible) A: Good B: Allowable C: Tolerable D: Not Permissible Suggested Classifications: Class I: Small (up to 15kW) machines and subassemblies of larger machines. The EXAMINER 1000 is designed in conjunction with vibration limits established in ISO Standards 2372(10816)/3945 to help you detect signs of malfunction or changes in rotating machinery during operation. ![]()
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