For this the calibration screen of the new BeQuiet+ electronics can be entered by the user via an extra password (ISO requirement). The pick-up must be clamped into an external calibration device which produces a well-known vibration signal (fixed frequency and defined amplitude).The amplitude is then keyed into the CMME 7000 A/ BeQuiet+ and compared with the measured amplitude from the pickup. A correction factor is automatically determined by the electronics.
The SKF rig is able to measure the specific disturbances – called vibration peaks – caused by over-rolling of particles. The key component of the rig is the proprietary SKF peak detection algorithm, which enables these vibration peaks to be singled out from the overall bearing vibration signal. The number of peaks detected and their intensity are used to assess quantitatively the quiet running behaviour.
The user is then able to compare the result with a definable target.
In a further step, a measurement of “Damping Ability” is also determined. The aim is to relate the bearing noise of the dry bearing in certain frequency bands to the bearing noise of the greased bearing.