Filtering counter input?

[Ralph@NES]

Hello

I've got some RF and scattered interference causing some errant readings from three sensors (two magnetic and one magnetic proximity) which are giving me RPM readings from a spinning shaft.

Efforts to pinpoint and eradicate the interference have been fruitless and I believe I may be stuck with it.  It is causing errant high readings.

Here is my subVI for obtaining speed data from a sensor; This sensor is picking up one pulse per revolution on a 12000RPM shaft, 200hz.  What I would like to do is be able to filter my frequency input so that the unreasonably high numbers are discarded and not calculated for my mean RPM output.

I found the examples on property nodes and worked it into the flow of my subVI, but I'm not sure how to set it or even if it's going to do what I want it to.  I know I can't use a standard 'filter' DAQ assistant since I'm not getting a waveform, but a number.  I need desperately to remove these errant high readings from my setup ASAP and cannot afford to waste more time on chasing RF around the room.

I've also been successful at getting RPM data via period, and could use that and apply a filter if someone had an idea.

Any help is greatly appreciated.  I am going to also ask in the DAQ forum since this is a hardware specific issue as well.

[Ralph@NES]

Anyone?

[Robert_F]

Hello Ralph,

Please keep each question to one thread.  It helps our community find answers to questions easier.  Thanks for your support.

The answer to this question can be found here.

[Ralph@NES]

Sorry, I didn't know whether this was a labview question or a hardware one, or both.  I didn't want to post in one and miss the attention of someone who could easily cover it.

Thanks for bearing with me.