With significantly fluctuating shaft speeds, it is useful to enable resampling for IEPE sensors. The calculations are then speed based rather than time-dependent. This enables damage to be detected more effectively in the FFT and in the envelope curve, and improves the analysis. To enable resampling, switch to editing mode and click on the Enable switch.

General settings for resampling

Enable

You can use this switch to enable (green) and disable (red) resampling.

Speed signal

Enter the speed sensor to be used for resampling the time signal.

Calculation

Only “Time based resampling” can be selected here.

Multiplier

Not used for the calculation.

Parameters

Opens the settings for the resampling calculation parameters:

Time delay

This value is specified in ms. Default value: 250 ms

If a TCP/IP channel is used as the speed signal, this value can be used to take into account the time delay caused by TCP/IP communication. Various time delays always occur between speed acquisition and receipt of telegrams, and this value compensates for them. As a result, the IEPE signal and the speed signal are synchronous.

Time window MAvg (moving average)

This value is specified in ms. Default value: 500 ms

The speed signal is smoothed using a moving average. It is averaged over a time slot of e.g. 500 ms.