Trying to use Order Analysis Toolkit with the OAT Easy Resample Order Tracking.vi for fan wheel vibration analysis. It needs to work from 400-4200 RPM. I have it working good("stable" readings) at 1600+ RPM with 1 pulse per revolution, 20000Hz sample rate and 15000 samples. At 400 RPM both magnitude and phase angles are all over the place. Anyone know if there is a minimum RPM OAT needs to sample properly or do I need to change sample rates and number of samples taken?Thanks in advance,

Multifunction DAQ

That does not sound right...I'll need to look at the samp/rev to understand. I would think it is set by the decimator based on requested max order.

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