From the Instruction Manual
"When detecting on the beach, adjusting ground balance may not give significant improvements. Try adjusting sensitivity and altering patterns for best results."
"Using the detector in all metal, find a clear area of ground without any targets. Hold the coil parallel and 4” (10 cm) above the ground. Select Ground Balance. A constant hum known as the Ground Balance tone will sound when the coil is held steady. Continuously lower and raise the coil towards and away from the ground and listen to the Ground Balance tone. Try to lower the coil as close to the ground as possible without touching it. Adjust the Ground Balance using + and –, listening for minimum volume which will occur during the transition from low to high. If the tone is low, increase the Ground Balance setting using +, if the tone is high, decrease the setting using –. The menu scale andnumeric ID will indicate the chosen setting"
