97029 Rev C.1 09/18
Page 8 of 15
Once the UUT has been mounted on the ReferenceMate and a 1 g test level has been achieved,
you can check the output of your sensor.
Table 1 shows the relationship between acceleration, velocity and displacement at the three test
frequencies. If taking imperial measurements (US) use Table 1a and select 61.4 Hz as your
frequency. 1 g (acceleration) at 61.4 Hz is equivalent to 1 in/sec (velocity). If Peak measurement
type is selected, both acceleration and velocity will be peak levels. Conversely, if RMS is the
measurement type, then both values will be in RMS.
The equivalent peak to peak displacement values in mils are shown in Table 1a for reference. For
those using the metric system, Table 1b shows the equivalent values. All the values below are
represented in Graph 1.
Table 1a: English (1 g)
Table 1b: Metric (1 g = 9.81 m/s
2
)
Frequency
Velocity
Displacement
Hz
CPM
in/sec
mils, peak-peak
Peak mode
RMS mode
61.4
3684
1.00
5.18
7.34
100.0
6000
0.61
1.96
2.76
159.2
9552
0.39
0.77
1.09
Tables 1 and 2 show the relationships between 1g
acceleration and their equivalent displacements and
velocities based on selected frequency
Graph 1: the relationships between 61.4 Hz, 100 Hz, and 159.2 Hz
Frequency
Velocity
Displacement
Hz
CPM
mm/sec
µm, rms
Peak mode
RMS mode
61.4
3684
25.41
46.5
65.9
100.0 6000
15.61
17.5
24.8
159.2 9552
9.81
6.9
9.8
