User's Manual

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TEKNETICS
Comprehensive Operating Manual & Guide to Metal Detecting
TEKNETICS
Comprehensive Operating Manual & Guide to Metal Detecting
DISCRIMINATION MODE (continued)
NUMBER OF TONES (# OF TONES)
This menu selection offers the user a choice among several different methods of audio
discrimination to accommodate a variety of search conditions and personal preferences.
These methods differ in the way the signals are processed for analysis, and in the number of
audio tones used to identify different target types.
The detector has two ways of processing signals for analysis — continuous and sampled.
Continuous Processing
The detector processes a continuous signal response throughout the duration of the sweep of the
searchcoil over the target. All characteristics of the target are audibly communicated to the user.
Continuous processing gives a good feel for the size, depth, and shape of the target. Continuous
processing is preferred, for example, for relic hunting, especially in plowed or rocky ground.
Sampled Processing
Sampling takes a snapshot of the signal at its strongest point. This compromises the feel of a
continuous response, but provides for more accurate Target Identification. Sampling also
eliminates confusion caused by changes in tones during the sweep over the target. Sampling
is preferred, for example, when coinshooting in areas where there is aluminum trash.
The “# OF TONES” selections are:
TIP & TECHNIQUES
Search Techniques
Sweeping Searchcoil (this does not apply to Pinpointing
with the trigger switch) Keep the searchcoil in motion to detect
targets. Sweep the searchcoil parallel to the ground; do not lift
the searchcoil at the end of the sweep.
When you have located a target and continue sweeping back and
forth for verification, use broad, deliberate sweeps across the
target for the most accurate Target-ID. Do not use short sweeps
as you might with other metal detectors.
Shallow Targets
Shallow targets tend to give multiple responses, with the last response being the one that
remains illuminated on the visual display. This last response is usually sampled at the edge of
the searchcoil and will tend to be inaccurate. If you suspect a shallow target (within 2 to 3
inches of the searchcoil), lift the searchcoil slightly, and slow down your sweep speed until you
notice a single response consistently in the same place.
Large shallow targets will cause signal overload, indicated by the siren sound. In these instances,
raise the searchcoil until the overload warning disappears, and sweep at this increased height.
Large Targets
If an overload warning is not confined to a small spot, you are probably overloading on a large
object, for example, a large iron pipe, reinforcing steel in concrete, or buried sheet metal. It is
usually not possible to locate objects, such as coins, in close proximity to large masses of metal.
Using the special BOOST and
CACHE LOCATING selections
In situations where vegetation or other obstacles make it impossible to sweep the searchcoil
close to the surface of the ground, use the enhanced sensitivity of either the BOOST (bP) or
CACHE LOCATING (CL) selections, under the # OF TONES menu, to punch through the
extra distance to the target. Under most such conditions bP will provide the best balance of
depth and response. CL will punch through even more distance to the target, but response is
noticeably slower than bP.
Using bP or CL, if you sweep fast with the searchcoil close to the ground you will lose some
target separation. This loss is most noticeable using CL. Target separation using these
selections is comparable to that of 2+, provided that you slow down your sweep.
Some users, when fatigued after hours of searching, get sloppy with their seep technique. bP
is more tolerant of sloppy sweep technique than are the other selections and may be preferred
at these times.
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1: Single Medium pitch tone.
Discrimination is continuous, not sampled. Good for use in plowed or rocky ground.
1+: Medium-to-High pitch tone varying in proportion to target signal strength.
Large shallow objects will produce a squeal. The variable audio pitch provides you
more information about the detected object, but some people find the sound on strong
signals too annoying. Good for use in plowed or rocky ground.
The FeTone® feature is activated using 2+, 2A, 2b or 2c
2+: Two tones.
Same as 2+ except that iron produces a low-pitch tone regardless signal strength. The
discriminator is continuous. However, the iron tone feature relies on a combination of
continuous and sampled processing. 2+ is useful if you want to hear all targets.
2A: Same as 2+ except iron audio is lower volume.
2b: Same as 2+ except iron audio is very low volume.
2c: Same as 2+ except iron audio volume is muted. You will not hear iron, but the
display will still indicate iron.
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).