I'm trying to learn as much as I can about my AT PRO.
In the iron discrimination section, the Manual discusses masking of a coin by an adjacent iron nail. It suggests that the user unmask the coin by adjusting the iron discrimination to just barely reject the nail. The result is that the AT PRO measures the combined conductivity of the nail and coin and registers and sounds a combined VDI higher than the discrimination setting, thus revealing the presence of the coin. That makes sense if you know that there is a nail masking a coin under your coil and you know the VDI of the nail alone, but you don't. This seems like a catch-22. What am I missing?
In the iron discrimination section, the Manual discusses masking of a coin by an adjacent iron nail. It suggests that the user unmask the coin by adjusting the iron discrimination to just barely reject the nail. The result is that the AT PRO measures the combined conductivity of the nail and coin and registers and sounds a combined VDI higher than the discrimination setting, thus revealing the presence of the coin. That makes sense if you know that there is a nail masking a coin under your coil and you know the VDI of the nail alone, but you don't. This seems like a catch-22. What am I missing?