Sampling Rate (Frequency) Adjustment - TomTom Inductive Distance Measurement Tool Kit II User Manual

 Page 21 April 4, 2022
Fig. 8.4.1 (Gear Runout Measurement)
Switch to
Radar Chart
To adjust
sampling rate
Surface Type
Switches (radial)
Radial Sensor
Distance
Sampling
rate
Input Surface Type Edit Sensor
Sensor Axial Sensor
Cannel Switches (axial) Settings
Type Distance
8.4

Sampling Rate (Frequency) Adjustment

The sampling rate is the numbers of measurements, which are taken within one second; hence the
unit is Hz (Hertz). It is important to adjust the sampling rate to the measurement application.
In case of fast changing signals (e.g. run-out measurement of a kiln girth gear under full speed), the
frequency has to be high to catch each tooth tip (e.g. 100Hz)
In case of slow changing signals (e.g. kiln support roller shaft bending), the frequency can be low
(e.g. 10Hz) because the interesting value, varies only once over one complete kiln revolution.
Of course, slow applications could also be measured with a high sampling rate, but then,
unnecessary big data files would be created.
Some guidelines about the adequate sampling rates are also given later in the chapters of the
different measurement applications.
Attention:
In case, the sampling rate is tool low while measuring tooth wheels on the tooth tip, the results will
not be useful. Adjust the sampling rate to min. 5 times the gear mesh frequency.