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Comprehensive Operating Manual & Guide to Metal Detecting
PRO-ARC
22
PRO-ARC
Comprehensive Operating Manual & Guide to Metal Detecting
57
Capabilities and Limitations (continued)
zinc pennies, which read moderately high because of their size and shape. Although nails and
other iron and steel objects will usually give low readings, ring-shaped pieces of iron (for
instance steel washers and harness rings) will usually produce medium to high readings. Flat
pieces of iron or steel, such as can lids, will occasionally do the same.
Most targets can be identified accurately in air to a distance of about 10 inches. The minerals
in many soils will cause identification to be less accurate. In most soils, effective target
identification can be had to a depth of at least 8 inches.
REQUIREMENT FOR MOTION: PINPOINT FEATURE
As with other modern metal detectors, the PRO-ARC's searchcoil must be kept in motion in
order to both detect and identify targets. The All Metal modes are more forgiving of sweep
speed variation than is the Discrimination Mode.
The trigger-activated PinPoint feature continues to detect metal if searchcoil motion stops over
the target. The PinPoint feature is used primarily to pinpoint the exact location of a target so
that it can be retrieved with a minimum of digging, and does not provide target identification.
GROUND BALANCING
To achieve maximum depth in any detection mode, as well as when using the PinPoint
feature, the PRO-ARC offers the ability to cancel out ground minerals either by manual
adjustment, or automatically using the FASTGRAB™ feature.
24
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 three search modes, Static All Metal, Motion All Metal and Discrimination. To
change between an All Metal Mode and Discrimination Mode, 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 Discrimination is highlighted, rotate the SETTINGS knob to move
between the two categories.
Each search mode has several adjustable function settings:
ALL METAL: Threshold (not adjustable in stat mode), Audio Pitch, Sensitivity, and
Manual Ground Balance
DISCRIMINATION: Sensitivity, Discrimination Level, Notch, Number of Tones and
Process Number.
To select a function, push the MENU button and continue pushing in order to move to the
function you want. The word SETTING will pop up in the middle of the display and the present
setting of that function will be displayed as a number.
33
Comprehensive Operating Manual & Guide to Metal Detecting
PRO-ARC
22
PRO-ARC
Comprehensive Operating Manual & Guide to Metal Detecting
57
Capabilities and Limitations (continued)
zinc pennies, which read moderately high because of their size and shape. Although nails and
other iron and steel objects will usually give low readings, ring-shaped pieces of iron (for
instance steel washers and harness rings) will usually produce medium to high readings. Flat
pieces of iron or steel, such as can lids, will occasionally do the same.
Most targets can be identified accurately in air to a distance of about 10 inches. The minerals
in many soils will cause identification to be less accurate. In most soils, effective target
identification can be had to a depth of at least 8 inches.
REQUIREMENT FOR MOTION: PINPOINT FEATURE
As with other modern metal detectors, the PRO-ARC's searchcoil must be kept in motion in
order to both detect and identify targets. The All Metal modes are more forgiving of sweep
speed variation than is the Discrimination Mode.
The trigger-activated PinPoint feature continues to detect metal if searchcoil motion stops over
the target. The PinPoint feature is used primarily to pinpoint the exact location of a target so
that it can be retrieved with a minimum of digging, and does not provide target identification.
GROUND BALANCING
To achieve maximum depth in any detection mode, as well as when using the PinPoint
feature, the PRO-ARC offers the ability to cancel out ground minerals either by manual
adjustment, or automatically using the FASTGRAB™ feature.
24
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 three search modes, Static All Metal, Motion All Metal and Discrimination. To
change between an All Metal Mode and Discrimination Mode, 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 Discrimination is highlighted, rotate the SETTINGS knob to move
between the two categories.
Each search mode has several adjustable function settings:
ALL METAL: Threshold (not adjustable in stat mode), Audio Pitch, Sensitivity, and
Manual Ground Balance
DISCRIMINATION: Sensitivity, Discrimination Level, Notch, Number of Tones and
Process Number.
To select a function, push the MENU button and continue pushing in order to move to the
function you want. The word SETTING will pop up in the middle of the display and the present
setting of that function will be displayed as a number.
