Muti-Channel Low Pass Filter

[Controls_Engineer]

I am using a NI 6210 to measure temperatures using thermocouples. The signal acquired is very noisy. What signal processing technique can be applied to all the channels once they are read using the DAQ MX Read Instruction (Analog 2D DBL NChnnl NSamp) ?

I tried using the Filter Express Vi from Sinal express. It works when I am reading only 1 channel, but does not work for multiple channels? How can I use this for  a 2 dimensional array of data?

[hoffiz]

What you need to use is the “convert to dynamic data”, this function will be in the same place as the filter, but one category up, instead of signal analysis it will be under signal manipulation. One article that is kind of doing the opposite is: Exercise 3: Easily Add Analysis to Your LabVIEW Application. But resuming on your problem I have attach what more or less you will need to do to get your code running. Here as you can see you will have your data type in DBL and in a waveform data type. If by any chance you get this error -20023: Troubleshooting Error -20023 from Filter VIs.

I hope it helps

Message Edited by Jaime F on 11-14-2007 05:33 PM