George,
Repost this in the White's section, better section for this question... But it isnt a bad start here either.... Just a suggestion for ya cuz'. http://www.treasurenet.com/forums/white-s/
Shoot a big one tomorrow...
George, the disc block edit is where you can set the unit to discriminate a block of numbers. You go into settings, find that one, select it, and scroll through the numbers that you want to notch out. There is learn accept/learn reject for notching out individual numbers on the conductivity scale.