Ground Balance - Minelab X-terra 305 Instruction Manual

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ground balanCe

The X-Terra 305 and 505 have an adjustable
ground balance which helps in compensating
for false signals.
When the detector is unbalanced, it will detect
targets, but it may also register false detections
due to ground mineralisation. These false
detections are displayed as –9 in the 505 and
–4 in the 305 in All Metal, or as two dashes
when using the factory preset patterns. This
will cause good targets to be displayed only
briefly and with clipped sound.
X-Terra 305
Ground Balance range = 0–20
Factory Preset = 6
X-Terra 505
Ground Balance range = 0–50
Factory Preset = 15
Ground balancing the detector reduces false
detections and enables good targets to be
displayed and heard correctly.
Ground balance settings affect both normal
discrimination detection and pinpoint
operation.
If there is difficulty ground balancing in an
area with the X-Terra, try reducing the
Sensitivity (p. 46).
When detecting on the beach, adjusting
ground balance may not give significant
improvements. Try adjusting sensitivity
and altering patterns for best results.
Highly mineralised soil may produce false
signals and distract from real targets.
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Mineralised ground and 'hot rocks'
may register as –9 when detecting in
all metal. This is more likely to happen
at high sensitivity settings and with an
unbalanced detector.