low frequency random noise

[barredo]

I'm using a Multifunction DAQ device to read a thermocouple voltage. I'm measuring a low frequency random noise in the low level DC signal. I'd like to have it eliminated from the original input, but it seems to be impossible without a low-pass filter. Is there a way to remove it via software?. We're using Measurement Studio for Delphi.

[Jorge M.]

Hello Barredo,

depending on what version of Measurement Studio you use, it may include analysis functions that should be useful. You can quickly check for these in the Help and see if there are any analysis functions/routines/methods.

What I'd use is averaging or software filtering (digital filters).
Here's some info that may be useful:

http://digital.ni.com/public.nsf/websearch/1F72E5DC795EFB85862562980052BC13?OpenDocument

this one a little bit more in-depth:

http://zone.ni.com/devzone/conceptd.nsf/webmain/D3887A3DF70CBE0F86256A5400681ACD?opendocument

Here you can check the versions and differences among the various Measurement Studio packages:

http://sine.ni.com/apps/we/nioc.vp?cid=1411〈=US

Regards,

JorgeM.