Can Bently vibration, displacement, and speed probes be used as substitutes for each other?

This post was last edited by ZhiGE on 2019-4-30 08:28. 1. The probes are interchangeable, but two matches need to be considered: first, the probe + extension cable must match the preamplifier； II. Matching of the functions required with the components of the framework. The product technical specifications state that the system outputs a voltage signal proportional to the distance between the tip of the probe and the surface of the conductor being measured, allowing for the measurement of both static (displacement) and dynamic (vibration) values. The system is primarily used for measuring vibration and displacement in sliding bearing machinery, as well as for Keyphasor* key phase and rotational speed measurement ； 2. The vibration signal should be a DC voltage + frequency signal ； The displacement output is a DC voltage signal. Because this is how the signals are simulated when testing the channels of the BN framework.

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They are interchangeable; all the sensing elements are known as eddy current probes. I once measured the output of the preamplifier – the output corresponding to displacement goes from 0 to -24 V, with a typical value of -9.8 V. When measuring vibration, the output is an alternating voltage signal. The rotation speed has not been measured. Not sure, it’s been too long; please help fill in the details

Probe characteristics and applications: Vibration probe: Mainly used for monitoring the vibration of large and medium-sized rotating machinery. Displacement probe: Used to measure static or dynamic displacement values, such as the displacement measurement in sliding bearing machinery. Speed probe: It is typically used in conjunction with a keyphasor sensor to monitor the speed and phase information of rotating equipment. Probe interchangeability: Although these three types of probes share similarities in their system composition (including the probe, extension cable, and preamplifier), they cannot be directly substituted for one another due to differences in their application scenarios and measurement parameters. Each probe is optimized for specific measurement requirements. Type of signal output by the preamplifier to the controller: The output signal from the Bently 3300 XL 8mm eddy current sensor system is a voltage signal, which is proportional to the distance between the tip of the probe and the surface of the conductor being measured. This means that whether it is a vibration, displacement, or speed probe, its associated preamplifier will output a similar voltage signal to the controller. However, the specific range of these voltage signals and the way they are interpreted (such as to represent vibration amplitude, displacement, or rotational speed) depend on the type, configuration, and calibration of the probe.