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your search area and determine the kinds of metal
items you want eliminated from detection. With zero
discrimination, you will achieve maximum detection
depth and will detect all metals including foil and pull-
tabs, but you won't miss any desirable targets. Once
you are familiar with the hunting area, then re-adjust
the discrimination setting to a level that will eliminate
unwanted items.
Be aware that high concentrations of saltwater may
require increasing the Discrimination up to a value of
three or less (see tips on Searching Shorelines and
Shallow Surf on page 25).
5. Bench Testing and Understanding
Audio Signals:
Bench testing is recommended to familiarize your-
self with the detection capabilities and audio respons-
es of the detector. This will help you determine if
a target is treasure or trash. Since Pulse Induction
machines only give audible clues to the identity of
detected targets, it's important to learn these different
signals.
Tests should be performed (Figure 16) with the
searchcoil perpendicular to a bench, floor or other
non-metallic surface and several feet away from any
large metallic object. Pass various metallic targets
from side-to-side across the bottom of the searchcoil
at a distance of about three inches. Listen carefully