East Texas Metal Detectors

1495 FM 49
Gilmer, Texas 75644
Phone: (903) 734-7773



How Does Ground Balancing Work?


The Elimination of Ground Mineralization Effects :

Many areas in the U.S. are plagued (from the detector users' viewpoint) with soils heavy in mineralization. Mineralization refers to magnetic iron particles present in the soil. These mineralized zones interrupt and hamper the electromagnetic field generated by low frequency detectors resulting in erratic responses and a loss of detection depth. Properly adjusting the Ground Balance of your detector control will allow your detector to hunt as deeply in these soils as in non-mineralized ground.

The Ground Balance circuity electronically samples the reciever at a location where mineralized ground doesn't produce a response. Metallic objects, however, will produce a strong response at this same setting. Since the masking ground static is cancelled and the depth of penetration is increased (due to the low operating frequency) the detector can be used for deep objects even though the soil may be heavily mineralized.

The Ground Balance control is one of the most misunderstood contols on a detector. Beginners are often confused and frustrated in their initial attempts to correctly ground balance the detector. Even seasoned veterans are sometimes lulled into a false sense of mastery over this control. The ground balance control is a manual adjustment that allows detector circuits to neutralize the detuning effects of mineralization. It's really a second discriminator control. Its range is simply limited to an area around the conductivity phase of the mineralization. Thus, the control can be set to accept the ground (tone increase), reject the ground (tone decrease), or to a precise neutral point at which the tone remains unchanged by the ground. By not setting the Ground Balance control to your detector, the mineralized soil actually disrupts the detector's transmit/recieve signal. This may cause false target resposes, reduced detection depth, missing targets and otherwise difficult operation.

Knowledgeable use of the Ground Balance control is essential for optimium detector performance. Notice I said "knowledgeable" use rather than "precise neutral adjustment". There are times when a true neutral setting is: 1) not obtainable; 2) not the best setting for circumstances; or 3) simply not needed. This of course, contradicts owner's manual instructions which emphasize the need for a precise and neutral ground adjustment. The manual is, in fact, correct according to design theory based on nominal ground conditions. In actual practice you will find most field conditions to be anything but nominal.



Good luck, and I hope this helped !!


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