scope:

This International Standard states the requirements which a measuring instrument for vibration severity of machines should meet if inaccuracies of measurement made on the casing of machines, particularly when making comparisons between one machine and another, are not to exceed a specific value. Instruments meeting the requirements of this International Standard are suitable for use in carrying out the procedures specified in ISO 10816 according to the general procedures of ISO 13373-1. The instruments covered by this International Standard give direct indication or recording of root-mean-square vibration velocity, which is defined as the measurement unit of the vibration severity. NOTE 1 A method of checking true root-mean-square indication is described in annex A. This is mainly maintained for instruments not based on modern analogue to digital conversion and numerical calculation of root-mean-square, but can also be applied for these. NOTE 2 Subject to limitation of the measurement frequency range, these instruments may be used for other applications where similar accuracy of measurement is required, for example measurement of vibration velocity of structures, tunnels, bridges, etc.