09-06-2005 09:28 PM
09-07-2005 12:46 PM
Read the section "Field Wiring and Noise Considerations for Analog Signals" on the NI web site. Also consider the absolute accuracy of your card and see of it's appropriate for your measurement, you might want to consider the newer M-series cards which have higher absolute accuracy and can sample at higher rates affording you the ability to average your readings thus further reducing noise.
Hope this helps,
Sam
09-07-2005 03:30 PM