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This document specifies the general requirements for evaluating the vibration of various coupled industrial machine types with operating speeds between 120 r/min and 30 000 r/min when measurements are made in-situ. This document gives guidelines for applying evaluation criteria for measurements taken on non-rotating and rotating parts under normal operating conditions. The guidelines are presented in terms of both steady running vibration values and in terms of changes to vibration magnitude, which can occur in these steady values. This document is applicable to the following machine types: The vibration criteria presented in this document are generally only applicable to fans with power ratings greater than 300 kW or which are not flexibly supported. Classifications can be agreed between the machine manufacturer and the customer using results of previous operational experience (also see ISO 14694). This document is applicable to machinery including a gear unit ISO 20816-9 contains information for special acceptance tests related to gear units. This document is not applicable to the following types of industrial machines: This document is applicable to in-situ broad-band vibration measurements taken on the shafts, bearings, bearing pedestals or housings of machines under steady-state operating conditions within their nominal operating speed range. The requirements relate to both acceptance testing and operational monitoring. The evaluation criteria can be applied to both continuous and non-continuous monitoring situations. This document is applicable to machines which have gears or rolling bearings but does not address the diagnostic evaluation of the condition of those gears or bearings. This document is applicable only for the vibration produced by the machine set itself and not for vibration that is transmitted to the machine set from external sources.