Minelab 4901 - 0059 Ground Balance Normal, Ground Balance Beach, Adjusting Ground Balance

40GROUND BALANCE

The X-terra 70 is capable of operating in two different types of grounds, magnetic (ie. inland parks) and conductive (wet areas of salt water beaches). Ground mineralisation may cause false target signals in all environments. Ground Balancing the detector reduces these ground signals and enables good targets to be displayed and/or heard correctly.

Ground Balance (Normal)

Ground Balance (Normal) is suitable for inland use and is operating when the beach icon is off.

An unbalanced detector in Coin & Treasure Mode will blank continuously (if a pattern rejecting –8 is used) or detect –8 continuously (if a pattern accepting –8 is used).

An unbalanced detector in Prospecting Mode will produce a continuous ‘warbling’ sound that differs from the sharper sound of a real target signal.

Ground Balance (Beach)

Ground Balance (Beach) is suitable for salt water beach use and is operating when the beach icon is on.

In Ground Balance (Beach) the X-Terra

70 can Ground Balance any combination of magnetic and conductive soil (e.g.

a mixture of sand, soil and salt water). However, ferrous and some low conductivity targets can be balanced out. For this reason in Ground Balance (Beach), Tracking should be used only when targets are far apart.

Try reducing Sensitivity (pg. 30) before Ground Balancing.

Activating Ground Balance (Beach)

Press GROUND BALANCE.

Press and hold GROUND BALANCE for three seconds. The beach umbrella icon will appear to indicate that Ground Balance (Beach) is activated.

To de-activate Ground Balance (Beach), press and hold GROUND BALANCE for three seconds. The beach umbrella icon will disappear indicating that Ground Balance (Beach) is de-activated.

Press PINPOINT DETECT or GROUND BALANCE

to return to detection.

Ground Balance settings affect both normal detection and Pinpoint operation.

Adjusting Ground Balance

The Ground Balance setting can be adjusted in three ways, automatically, manually, or with Tracking.

Auto Ground Balance will generally give a good Ground Balance setting. This may be further adjusted manually, using the + and – buttons.

Press GROUND BALANCE.

Adjust Ground Balance with Auto, Manual or Track (pg. 42).

Press PINPOINT DETECT or GROUND

BALANCE to return to detection.

When detecting on the beach, adjusting Ground Balance may not give significant improvements. Try adjusting Sensitivity and altering Patterns for best results.

41

Press and hold

GROUND BALANCE

for three seconds to activate Ground Balance (Beach)

Adjust Ground Balance with

Auto, Manual or Track (pg. 42)