Product Manual

407860 V2.3 7/09 11
Appendix B: Relative Sensitivity Table (ISO 2954)
Relative sensitivity
Frequency (Hz)
Normal value Minimum value Maximum value
10 1.0 0.8 1.1
20
1.0
0.9 1.1
40
1.0
0.9 1.1
80
1.0
1.0 1.0
160
1.0
0.9 1.1
500
1.0
0.9 1.1
1000
1.0
0.8 1.1
Appendix C: Glossary
Vibration: Vibration is an oscillation or repetitive motion of an object around an equilibrium
position.
Displacement: Displacement is the peak-to-peak distance from a reference position, or
equilibrium point, of an object under test.
Peak to Peak Amplitude: Peak –to-peak amplitude is the displacement of an object (see
above). It can be thought of as the distance from the maximum positive deviation point to
the maximum negative deviation point with respect to an object’s equilibrium position.
Velocity: Velocity is the rate of change of displacement. Velocity is measured in
inches/second (mm/second) units.
Acceleration: Acceleration is the rate of change of velocity. Units of measure for
Acceleration is feet per second squared (meters per second squared)
Peak Amplitude: Maximum deviation of an object from its equilibrium position.
RMS: Root Mean Square Amplitude (RMS) is the square root of the average of the
squared values of a waveform. The RMS amplitude of vibration is 0.707 times the peak
amplitude value The RMS value of a vibration signal is an important measure of its
amplitude.