how to interface tachometer in ni-daq 6323

[uxmanz]

I have NI-DAq 6323 with SCC 68, and i want to calculate frequency of a signal generated by tachometer. The signal is a simple square waveform of 0 and 7 volts. First thing i want to know how to interface that sensor with SCC and the how to program it to use as a tachometer. 

Thank you.

[Tortu · Accepted solution]

Greetings uxmanz

The counter inputs of your NI 6323 are the best way to measure the frequency of the digital signal generated by your tachometer. The catch is that the counter input has a range of 0V to 5V. Therefore, it is necessary to attenuate the signal before connecting it to the counter input. The SCC 68 has a breadboard section where you can solder a simple Op Amp that reduces the signal’s amplitude to 5V. You can then connect it to a counter input and use one of the examples that come with LabVIEW. Depending on your version, the name could change, but there is bound to be one example that works for measuring frequency with the counter. If you have trouble finding one example, tell us what LabVIEW version do you have and we could help you out better. Let us know if you have any other question. Have a nice day.