User Manual

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TEKNETICS
Comprehensive Operating Manual & Guide to Metal Detecting
TEKNETICS
Comprehensive Operating Manual & Guide to Metal Detecting
THE MENU SYSTEM
The entire menu is printed on the LCD display. The display highlights the mode and settings
which are in use.
There are two search modes, All Metal and Discrimination. To change between search
modes, the top line of the menu system must be highlighted. Press the MENU button until the
top line of the menu is highlighted. When either
ALL METAL or DISCRIM is highlighted,
rotate the SETTINGS knob to change between the two modes.
Each search mode has three adjustable function settings:
ALL METAL: Sensitivity, Hum Level, and Manual Ground Cancellation. See page 15.
DISCRIMINATION: Sensitivity, Discrimination Level, and Number of Tones. See page 15-16.
To select a function, push the MENU button and continue pushing to move to the function you
want. The word
SETTING will pop up on the display above the menu, and the present setting
of that function will be displayed as a number.
To change a setting, rotate the knob.
To increase a value, rotate to the right
(clockwise)
To decrease a value, rotate to the left
(counterclockwise)
If you select a function and do not make a change to that
function after 5 seconds, the detector will exit the menu
system automatically, and resume normal operation.
CONTROLS (continued)
When you rotate the settings knob, you are also changing the value. If using this knob to
recall a setting, it is best to rotate just one indent.
TRIGGER SWITCH (Under the control housing in front of your hand)
While the trigger is pulled back, metal objects are temporarily detected without the need for
searchcoil motion. This aids in pinpointing the exact location of objects which were found
while searching in the All Metal or Discrimination Mode.
When the trigger is
pushed forward, FASTGRAB™ automatic ground cancellation is activated.
The internal computer measures the magnetic properties of the soil in order to cancel
interference from naturally-occurring minerals in the ground. After the detector measures the
soil in this manner, the detector then uses this information to control operation in both the All
Metal and Discrimination search modes.
SEARCH TECHNIQUES (continued)
HOT ROCKS
A hot rock is a rock which causes the metal detector to sound off because the rock contains
iron minerals. They come in two basic types.
Negative hot rocks (also called cold rocks) are usually magnetite or contain magnetite,
and give a negative response because their ground cancellation phase is a higher
number than the soil they are found in. They tend to be dark in color, usually black, and
usually heavy. In some cases they will have rust stains. They are usually attracted to a
magnet, and for this reason gold prospectors always carry a magnet—the ultimate
ferrous/nonferrous discriminator. In All Metal Mode, negative hot rocks produce a
boing
sound rather than the zip sound of a metallic target; recognize the difference and you will
learn to ignore them.
Positive hot rocks are iron-bearing rocks which have been oxidized by natural weathering
processes so that their Ground Phase number is a number lower than the soil they are
found in. They are often small, right on the surface, sound just like a gold nugget, and
are common in many gold prospecting areas. They are usually, but not always, drawn to
a magnet. They are most often reddish in color but are often black, brown, or yellow. On
relic hunting sites, red clay bricks and rocks which have lined a fireplace or a campfire
will often be
hot rocks. The discriminator will usually eliminate them without difficulty if
widely scattered, but if there is a large concentration of them, the discriminator may not
quiet them all. In that case, you can revert to the rule of thumb — “don’t dig non-
repeatable signals”.
Using the Sensitivity Control
When the T
2
is first turned on, the Sensitivity is at a medium setting appropriate for most
coinshooting. For relic hunting or gold prospecting, higher Sensitivity settings are preferred.
In the event of nuisance detection signals due to electrical interference from electrical power
lines, electrical or electronic appliances, or another metal detector, it is usually necessary to
reduce the Sensitivity setting to achieve quiet operation. Alternatively, use the Frequency Shift
feature described earlier in this manual.
If, while searching, you are constantly getting signals from which you cannot recover metal
targets, you may be detecting small or deep targets which are not recoverable using the
methods at hand. So, you may do better if you reduce the Sensitivity setting.