Manual

Comprehensive Operating Manual & Guide to Metal Detecting
Comprehensive Operating Manual & Guide to Metal Detecting
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F75
F75
Using DISC LEVEL in conjunction with NOTCH gives you a great deal of flexibility in deciding
which values to include or exclude from detection. Beware that this combination can be
confusing.
Here are some examples of NOTCH used in conjunction with DISC LEVEL
If Discrimination Level is set at 60, and you set the top-of-foil (21-25) notch between 21
and 25, then: top-of-foil range (21-25) is NOTCHED-IN (i.e. detected)
If Discrimination Level is set at 23, and you set the top-of-foil (21-25) notch between 21
and 25, then: 21, 22, & 23 are NOTCHED-IN. 24 & 25 are NOTCHED-OUT
If Discrimination Level is set at 15, and you set the top-of-foil (21-25) notch between 21
and 25, then: 21-25 are NOTCHED-OUT
NUMBER OF TONES (# OF TONES)
This menu selection allows you to select the number of audio tones emitted by the detector.
Different search conditions, search objectives, or personal preference will determine how
many tones you want to hear. With the below settings, you can decide to hear the same tone,
regardless of the target category, or have different categories of targets induce different tones.
The “# OF TONES” selections are:
1: SINGLE MEDIUM PITCH TONE.
All types of metal induce the same tone.
1F: 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.
2F: TWO TONES.
Similar to
1F, except that iron produces a low-pitched tone regardless signal strength.
Useful if you want to hear all targets and want to identify iron. Most relic hunters prefer
this selection.
3H: same as 3, except that nickels produce a high tone.
3: THREE DIFFERENT AUDIO TONES. Iron produces a low pitch tone. Aluminum trash,
zinc pennies, and nickels produce a medium tone. High conductivity coins produce a
high tone. The 3-tone selection is often preferred for coinshooting. Most users will set the
discrimination level below nickels, at about 25, and dig only objects that produce a
consistent and repeatable high tone. NOTE: with this setting, steel bottle caps may
produce consistent high tones, similar to coins. See Capabilities & Limitations section for
advice on identifying steel bottle caps.
4H: same as 4, except that nickels produce a high tone.
Useful when coinshooting in a trashy area.
Discrimination Mode (continued)
LCD Visual Display
In normal operation, when the searchcoil passes over a metal object, the electrical signature
(2-digit I.D.) of the metal object is displayed on the numeric display for 4 seconds, unless
superceded by another detected object. On a given buried object, the number will bounce
around if the signal is weak or if the amount of ground mineralization is high.
At the top of the display, a block illuminates to indicate the classification of the object.
Target ID is provided in all three modes, and requires motion in all modes, including STAT.
NUMERIC TARGET I.D. (2-digits)
The following table shows the numbers typically associated with certain commonly
encountered nonferrous metal objects. Older silver U.S. coins usually read about the same as
their modern clad equivalents. Modern quarter-sized dollar coins like the Susan B. Anthony
and the Sacagawea read about the same as a quarter. Many Canadian coins are minted from
a magnetic nickel alloy which gives very inconsistent readings and may register as iron. Most
one-ounce silver bullion coins will fall into the same range as the modern U.S. $1 Eagle.
OBJECT TARGET I.D.
Most iron objects 4-12
foil from gum wrapper 16-25
U.S. nickel (5¢ coin) typically 30
aluminum pull-tab 33-55
aluminum screwcap 60 - 70
zinc penny (dated after 1982) typically 60
aluminum soda pop can most often 63-69,
but can vary widely
copper penny, clad dime typically 70
U.S. quarter (25¢ coin), clad typically 80
50¢ coin, modern clad typically 86
old silver dollar coin typically 90
US silver Eagle $1 coin typically 91
PROBABLE TARGET I.D.
The probable target ID zones at the top of the LCD display represent the signal ranges
produced by various coins and types of metal objects. When a metal target is detected, the
microcomputer analyzes the signal and categorizes it based on what kinds of metal objects
usually produce that kind of signal. The microprocessor then displays a rectangle-like icon
along the top of the LCD screen above the corresponding category.
For instance, if the detected signal fits within the parameters usually exhibited by zinc pennies,
the microcomputer will categorize the signal as "zinc penny". The LCD screen will then
illuminate the block above “ZINC”
Copper pennies (pre-1982) will usually register in the DIME zone.
Most gold jewelry is small, and will tend to read in the 16-55 range. Silver jewelry usually has
more metal in it and therefore tends to produce higher readings.
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