frequency. It is a similar result for displacement - the vibration velocity at any frequency
is proportional to the displacement times of the frequency. For a given displacement, if
the frequency is doubled, the velocity will also double and if the frequency is increased
tenfold, the velocity is also increased by a factor of ten.
To add further clarity, if the sensor produces a constant force of 1g at varying
frequencies we can easily see the relationship to velocity and displacement.
Frequency
Acceleration
Velocity
Displacement
(Hz)
(g)
(mm/s)
(mm)
1000
1
1.56
0.00025
100
1
15.6
0.025
10
1
156
2.5
1
1
1560
250
*All above readings in peak
Notes from Lutron
The vibration sensor and the vibration cable are the very high impedance units,
so the vibration measurement procedures should be executed very carefully.
During the measurement, hand or the fingers cannot touch the cable or the
socket, only use the hand to hold the instrument if necessary [much better to
clamp in place]
For the precision vibration measurement, if possible, we should use tape to fix
the cable on a solid place to prevent it from moving
The above operation procedures should be consideration for the displacement
measurement especially because the displacement circuit is the high gain
compared with the measurement of acceleration and velocity
