Excellent article > "Field Wiring and Noise Considerations for Analog Signals" > "http://zone.ni.com/devzone/conceptd.nsf/webmain/01F147E156A1BE15862568650057DF15" RM Ref: Duffey Thomas, ARocket -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist