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TEKNETICS
Comprehensive Operating Manual & Guide to Metal Detecting
TEKNETICS
Comprehensive Operating Manual & Guide to Metal Detecting
LCD VISUAL DISPLAY (continued)
The target indicator arrows are coded for signal strength — bold arrow for strong signals, caret
(
^
) arrow for medium signals, and small triangle for weak signals. When sweeping back and
forth to check a target, the indications corresponding to the strongest signals will usually be
the most accurate.
TARGET DEPTH
When the trigger is pulled to facilitate pinpointing an object, the numerical display indicates the
approximate depth of the object, in inches, based on the assumption that the object is a typical
US coin. Small objects will read deeper than they actually are, and large objects will usually
read shallower than they actually are.
G.C. PHASE
This is the ground cancellation setting, 0-99. It is displayed when in the Manual G.C. menu
setting, and when the trigger is pushed for FASTGRAB computer-assisted ground cancellation.
SETTING
This is illuminated when you are in the menu. When the word “SETTING” is indicated, the
number being displayed is a setting, and not, for instance, a Target ID indication.
MESSAGES
If a metal object or highly magnetic soil is so close to the searchcoil that the signal is
overloading the circuit, the message OVERLOAD - RAISE COIL will appear.
Such overloads will not harm the detector, but the detector will not detect metals properly
under these conditions. Raise the coil until the message disappears; the siren sound will also
stop. Resume normal detection.
The message RAISE COIL only appears when using the 3b or dP methods, accessed through
# OF TONES menu selection. This message indicates the presence of a target which may be
too close to the searchcoil to be accurately identified. For better target identification, sweep
the searchcoil farther away from the surface of the ground.
The message PUMP COIL TO GC will
appear when you push the trigger forward
to ground cancel. See the Manual Ground
Cancellation section of this manual for
instructions.
The message CAN’T GC can only appear
when the trigger is pushed forward,
invoking FASTGRAB automatic ground
cancellation. This message appears when
the detector is unable to measure the soil
in a manner suitable for ground canceling.
This message is usually the result of the
presence of metal. Try another spot to find
an area free of metal.
DISCRIMINATION MODE (continued)
2+: Two tones.
Similar to 1+, except that iron produces a low-pitched
tone regardless signal strength. The discriminator is
continuous. However, the iron tone feature relies on a
combination of continuous and sampled processing.
Useful if you want to hear all targets.
3: Three different audio tones.
Iron produces a
low pitched tone. Aluminum trash and zinc pennies
produce a medium tone. Most other coins, including
nickels, produce a high tone. A combination of
continuous and sampled processing reduces the
breaking up of the tone due to deep objects, or
multiple objects close together. This method is
usually preferred if you are searching for coins in a trashy area. Most users will set the
discrimination level below nickels, at about 50, and dig only objects that produce a consistent
and repeatable high tone. NOTE: with this method, some steel bottle caps produce consistent
high tones, similar to coins (see section on bottle cap identification).
3b: Bottle Cap Mode
Similar to 3, but modified so that steel bottle caps will usually
produce inconsistent, or non-repeatable, tones and broken sounds. There may be a slight
reduction in the ability to separate adjacent targets. Use this method in areas with a high
concentration of steel bottle caps. Also refer to p. 23 for sweep techniques to aid in the
identification of steel bottle caps.
4: Four different audio tones
This method is similar to 3, but with a fourth medium-high
tone for targets in the numeric range of 73 to 79. This four-tone system is useful for searching
in areas where there may be very old coins which register in this range.
dP: Delta Pitch
This method produces a tone whose pitch varies in relation to the visual ID
number — the higher the ID, the higher the pitch. Good for relic hunting. Sampling is mostly
continuous. This method is also useful in areas with a high concentration of steel bottle caps.
Coins will produce a fairly constant pitch as you sweep back and forth. Bottle caps produce
inconsistent tones, often with a squawk at the beginning of the sound.
What You See vs. What You Hear
The visual target ID displayed on the LCD is based entirely on sampled processing; the
number displayed represents the snapshot. When using these different “# OF TONES”
methods, the detector’s audible response may differ from the visual. Using these methods,
there is not a 100% correspondence between what you see and what you hear, especially on
buried targets where ground minerals influence target ID and audible response. By making the
audio and visual systems independent, the T
2
allows each system to do what it does best.
The audio is optimized for quick response and target feel, whereas the visual system provides
the best numeric resolution of target ID.
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