IN THE FIELD TECHNIQUES
11
LOW BATTERY INDICATOR
The indicator light on the control panel will light up and stay on if the batteries need
replacing. When replacing batteries, replace both batteries at the same time. Use
ALKALINE batteries only. Non-alkaline batteries will cause poor detector operation
and lose power quickly.
TRASH ITEMS
Pull-Tabs: You will encounter a never-ending variety of pull-tabs. Most of the older
variety, those that detached completely from the can, will produce a
broken, scratchy tone with the discriminator adjusted to the
12:00 to 1:00 position in TONE mode, and can be completely
eliminated from detection in DISC mode. Many newer pull-tabs have a
magnetic signature similar to that of a nickel.
Cans: Older cans were made from tin, and can oxidize, inducing a high tone in
DISC mode. The best way to distinguish tin cans from valuable silver
coins, is with careful pinpointing. With practice, you can learn to
recognize a smaller target zone for a coin, and a larger zone for a tin can.
Foil: Foil can generally be eliminated in DISC mode. Small pieces of foil
usually induce a low tone.
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