33
Comprehensive Operating Manual & Guide to Metal Detecting
PRO-ARC
22
PRO-ARC
Comprehensive Operating Manual & Guide to Metal Detecting
55
Frequency Shifting (continued)
To shift frequencies:
1.
Hold the MENU button down. Do not release the button.
2.
Push the trigger forward
OR pull the trigger back to change the frequency.
Each frequency change requires a push of the MENU button. Each actuation will
shift the frequency by one value.
The LCD will display the frequency, from F1 to F7. F1 is the lowest frequency, F4 is the
default frequency. The PRO-ARC does not retain changes in the frequency setting when
powered off.
See the Search Techniques section of this manual for more information on electrical
interference.
26
Ground Balancing
What is Ground Balancing?
All soils contain minerals. Signals from ground minerals are
often tens or hundreds of times as strong as the signal from
a buried metal object. The magnetism of iron minerals,
found in nearly all soils, causes one type of interfering
signal. Dissolved mineral salts, found in some soils, are
electrically conductive, causing another type of interfering signal.
Ground Balancing is the process by which the metal detector
cancels the unwanted ground signals while leaving signals from
buried metal objects intact. This is accomplished by establishing
the detector's internal Ground Balance setting; this
setting is calibrated to the soil and eliminates the
signal produced by ground minerals.
Calibration to the actual soil condition will
result in deeper target detection, quieter
operation and more accurate target
identification. This calibration, or Ground Balancing,
Note: FASTGRAB™
will not automatically
balance over highly
conductive soils,
such as a wet salt
water beach.
33
Comprehensive Operating Manual & Guide to Metal Detecting
PRO-ARC
22
PRO-ARC
Comprehensive Operating Manual & Guide to Metal Detecting
55
Frequency Shifting (continued)
To shift frequencies:
1.
Hold the MENU button down. Do not release the button.
2.
Push the trigger forward
OR pull the trigger back to change the frequency.
Each frequency change requires a push of the MENU button. Each actuation will
shift the frequency by one value.
The LCD will display the frequency, from F1 to F7. F1 is the lowest frequency, F4 is the
default frequency. The PRO-ARC does not retain changes in the frequency setting when
powered off.
See the Search Techniques section of this manual for more information on electrical
interference.
26
Ground Balancing
What is Ground Balancing?
All soils contain minerals. Signals from ground minerals are
often tens or hundreds of times as strong as the signal from
a buried metal object. The magnetism of iron minerals,
found in nearly all soils, causes one type of interfering
signal. Dissolved mineral salts, found in some soils, are
electrically conductive, causing another type of interfering signal.
Ground Balancing is the process by which the metal detector
cancels the unwanted ground signals while leaving signals from
buried metal objects intact. This is accomplished by establishing
the detector's internal Ground Balance setting; this
setting is calibrated to the soil and eliminates the
signal produced by ground minerals.
Calibration to the actual soil condition will
result in deeper target detection, quieter
operation and more accurate target
identification. This calibration, or Ground Balancing,
Note: FASTGRAB™
will not automatically
balance over highly
conductive soils,
such as a wet salt
water beach.
