scope:

This specification covers the minimum requirements for machinery monitoring systems using piezoelectric vibratory acceleration transducers. It outlines a standardized system covering hardware (sensors and instruments) requirements, installation, and arrangement. This system may be used separately or in conjunction with non-contacting, eddy current proximity devices as described in API Standard 670. Accelerometer-based vibration monitoring systems are generally used for machinery having high shaft-to-bearing transmissibility, such as with rolling element bearings; for speed changers to monitor gear mesh condition; and for other turbomachinery to monitor such high frequency phenomena as blade rate, blade passing, and rubs, as well as such low frequency phenomena as cavitation and reciprocating compressor forces.