When there's no real emf to speak of and I start graphing function I get a rise and fall of emf that takes about 10 seconds and is very constant. Anyone have any idea what that might be? It's not always there but very often, just curious :-)
How do you tell in the graphing mode? It's not hooked to the computer just seeing off the unit. It's at it's highest sensitivity because that doesn't show up on the vertical mode as existing at all. It's apparently very weak...