Determining RPM | LabJack

Determining RPM

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dalmaraz09's picture
Determining RPM


I have the LabJack U3-LV connected to an rotary encoder. As the encoder rotates, LJLogUD is graphing the data from the rotating encoder into volts vs time.

Attached is a pic of how I have LJLogUD set up.

How do I interpret the data into RPM?

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LabJack Support
labjack support's picture
To bring digital data in

To bring digital data in using special analog channel numbers see Section 3.2.1 of the U3 Datasheet:

For example, if you are using Timer0 you want to read channels 200 and 224 and then combine them.  For more detail go to the "Scaling Equations" section on the LJLogUD page and follow the link " ... for more details see the LJLog/Stream Scaling Equations page."