White’s Electronics TDI - Manual (Page 13)

PulseScan TDI Owner’s Guide 
TARGET CONDUCTIVITY -
What it does
This control allows the user to select whether he wishes to hear only low-
conductive targets, only high-conductive targets, or both low and high conduc-
tive targets. Low-conductive targets, like small-to-medium sized gold nuggets
will make a high-tone sound. High-conductive targets like coins, except nickels,
will make a low-tone sound. This feature only works if the Gnd Bal toggle is in
the on position. When ground balance toggle is off, the switch
must be set to All
or Low, and all signals will sound the same.
How to use it
Set to low for low-conductive metals only, including small to medium-sized
gold nuggets, most small to large specimen gold in quartz, small gold rings, very
small silver rings and small gold coins, nickels, small thin hammered silver coins,
small bronze Roman coins, small boot tacks, lead bird shot, tiny broken bits of
iron, aluminum pull tabs, foil and bits and tips of small nails, etc.
Set to high for high-conductive metalsonly, including all U.S.coins (except
nickels), most silver rings, silver U.S. coins, very large gold rings, large gold
nuggets, very high content gold nuggets (not common), U.S. gold coins above
2.5 dollars, 24 K gold bullion (e.g. Canadian Maple leaf), small to large nails