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Search Techniques (continued)
Using the sensitivity control
When the PRO-ARC is first turned on, the Sensitivity is at a medium setting appropriate for
most areas. Depending on your needs or conditions at each site, a higher Sensitivity setting is
usually preferred.
In the event of detection of electrical interference from electrical power lines, electrical or
electronic appliances, or another metal detector, it is usually necessary to reduce the
Sensitivity setting to achieve quiet operation. Alternatively, use the Frequency Shift feature
described earlier in this manual.
If, while searching, you are constantly getting signals from which you cannot recover metal
targets, you may be detecting small or deep targets which are not recoverable using the
methods at hand. In this case you may do better if you reduce the Sensitivity setting.
Tips on Ground Balancing
When the PRO-ARC first turns on, the Ground Balance setting is preset to 90. This will give a
positive response on nearly all soils. If you search in the Discrimination Mode, you will
probably not have to balance to the ground. If you switch to All Metal Mode, ground balancing
will probably be necessary.
You must find a spot of ground which is free of metal to accurately balance to the ground.
Before you attempt to Ground Balance, sweep back and forth to see if any metal target is
Comprehensive Operating Manual & Guide to Metal Detecting
PRO-ARC
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