The Basics Of Metal Detecting - Fisher F44 Owner's Manual

DEPTH & TARGET DISPLAY
US. Zinc coins and
many non-U.S. coins of recent
50-59.
vintage are classified here.
Copper coins, small
silver coins (U.S. dime)
60-69.
Medium sized silver
coins (U.S. quarters)
70-79.
Large silver coins (U.S.
half dollars).
80-89.
Very Large silver coins
(U.S. silver dollar). When used in
90-99.
20
Continued)
areas outside the U.S., these
categories identify coins or metal
objects of high relative conductivity
(such as silver coins or relics), or
large objects made of any type of
metal.
Caution: The target indications are
visual references. Many other types
of metal can fall under any one of
these categories. While the detector
will eliminate or indicate the
presence of most common trash
items, it is impossible to accurately
classify ALL buried objects.
See Target-ID
Coin Reference Chart (Page 18).

THE BASICS OF METAL DETECTING

This metal detector is intended for locating buried metal objects. When
searching for metals, underground or on the surface, you have the following
challenges and objectives:
1. Ignoring signals caused by ground minerals.
2. Ignoring signals caused by metal objects you do not want to find, like
nails.
3. Identifying a buried metal object before you dig it up.
4. Estimating the size and depth of objects, to facilitate digging them up.
5. Eliminating the effects of electromagnetic interference from other
electronic devices.
Your metal detector is designed with these things in mind.
All soils contain minerals. Signals from ground minerals can interfere with
1. Ground Minerals
the signals from metal objects you want to find. All soils differ, and can
differ greatly, in the type and amount of ground minerals present. This
detector has proprietary circuitry to automatically eliminate interfering
signals from minerals that occur naturally in the ground.
NOTE: This detector will not completely eliminate interference from all
types of minerals. For example, the detector IS NOT designed for use on
wet sand saltwater beaches. Another example of soil this detector will not
eliminate is any soil containing large concentrations of iron oxides, which
are usually red in color.
If searching for coins, you want to ignore items like aluminum foil and nails.
2. Trash
You can see the Target-ID of the buried objects, listen to the sounds and
then decide what you want to dig up. Or, you can eliminate unwanted
metals from detection by using the different Modes or NOTCH feature or
use the Custom mode to create your own discrimination settings.
Metal objects are identified along the 9-segment Conductivity graphic symbols
3. Identifying Buried Objects
and with a large 2-digit target ID number in the center of the screen. Both are
indicators of the relative electrical conductivity of different objects. Segments
to the right indicate more conductive targets. Iron objects will be illuminated
with the Fe symbol. The Fe (iron) category will display target ID numbers from
1 to 19.
Gold, nickel and brass objects will be illuminated in the
"Gold" group
Silver and copper objects will be illuminated in the
"Silver" group
The 6-segment graphic indicates the relative depth of a buried metal object.
4. Size and Depth of Buried Objects
This graphic can indicate the relative size of different objects or their
distance from the searchcoil.
between it and the searchcoil, the more segment lines illuminated.
.
.
For a given object, the more distance
9