Hello,
I am new to LabView. I have a cDaq 9172 and three modules (9263, 9201, and 9401). I am trying to measure rpm of a shaft with a 24 tooth gear and magnetic pick up. The shaft is expected to rotate in a range between 0.5 and 5 RPM which corresponds to 0.2-2Hz square wave signals (analog acquisition). I've tried using the frequency channel on the digital module (9401) but I couldn't get the programming to wait to aquire the relatively low frequencies. I've also tried post processing the analog signal (module 9201) but the Tone Measurement VI gives me inaccurate measurements at low frequencies (<1Hz).
Could someone please offer me a simple solution for measuring frequency accurately for the expected range so that I can calculate the RPM?
Much appreciated,
Jake