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Measurement High Pass Low Pass Test
Hydro Displacement Direct
Aero Accel Band-pass (acceleration units)
Aero Accel Band-pass (integrated velocity units)
Table 22-1) Dynamic Measurement Test Frequencies Examples
Set the function generator amplitude according to the desired measurement level. Set the amplitude
according to the equation:
= ∗
1000
For example, if you want the measurement to be 3 mils peak to peak with a 200 mV/mil transducer
setting, set your function generator amplitude to:
3 ∗
200
1000
= 0.6 0.212
When working with integrated units, use a conversion tool to calculate the non-integrated sensor
signal at the required frequency. There are many internet websites that provide conversion tools.
For example, if you want to test a velocity amplitude of 0.5 in/sec pk at 3,600 rpm, the tool provides a
sensor input of 0.345 g rms. When using a 100 mV/g accelerometer, the input would be 34.5 mV
rms.
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