Vibration - Balluff BOS R254K-UUI-LH11-S4 Konfigurationsanleitung

BOS R254K-UUI-LH11-S4
Photoelectric Sensors
6
Secondary Device Functions (continued)
6.13

Vibration

6.13.1 Description
The device makes available two vibration values, which
provide valuable information for preventive maintenance:
– Total speed in [mm/s], which indicates the general
machine state (lower frequency range)
– Total acceleration in [g], which indicates the bearing
state (higher frequency range)
This secondary device function allows the measurement of
the vibration speed as a property of the physical
surroundings of a mechanical system. The primary goal is
to detect significant changes or deviations of the vibration.
The device sends messages if adjustable limit values are
exceeded.
6.13.2 Mathematics/Algorithm
The example in Tab. 6-62 shows a typical application of
vibration monitoring.
Application example (with vibration
frequency spectrum) as input
Tab. 6-62: Classic application – Detection of vibration changes
84 english
Primary characteristics:
Output Value
Unit
Vibration frequency
range
Measurement
range
1)
Detectable range of
the vibration
acceleration
Measurement error
The vibration velocity range is frequency-dependent. The specified
1)
value is the theoretical maximum within this frequency range at an
acceleration of 16 g.
Tab. 6-61: Vibration detection – Primary characteristics
Total result of the Description
measurement as
output
Vibration level v-RMS A classic application is the detection of the
[mm/s] wear of a bearing.
The spectrum and the amplitude of the
2.3
vibration change.
A more complex mechanical system (such
4.5 as a production line) returns more complex
measurement results (spectrum).
The output value is a total value for simple
7.1
handling.
Vibration Level
mm/s
10...1000 Hz
0...1770 mm/s
0...16 g
±10%