Minelab X-Terra 705 Instruction Manual page 24

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tracking ground balance offset
This setting is recommended for experienced
users.
Tracking GB Offset allows you to set the
Tracking Ground Balance slightly positive or
negative allowing a performance advantage
under certain conditions.
For example, this can be useful in mineralised
ground with hot rocks. The ground can be
balanced and then the Tracking GB Offset
adjusted to help reduce the effects of the
hot rocks. When detecting on the dry–wet
transition at the beach, dry sand will require
one Ground Balance setting and wet sand
another. You can use Tracking GB Offset to
compromise between the dry and wet sand.
A negative Tracking GB Offset (–1 to –15) may
slightly improve sensitivity in very mild soils.
A positive Tracking GB Offset (+1 to +15) may
slightly improve target ID accuracy.
To set your Tracking GB Offset:
Select Ground Balance
Press Accept/Reject to enter Tracking
GB Offset. The Ground Balance icon will
continuously flash and the offset number is
displayed via the digits and menu scale.
Press the + or – buttons to adjust.
Press Accept/Reject to save your setting
and return to Ground Balance.
Press Ground Balance or Pinpoint/
Detect
to save the Tracking GB Offset
and return to the main detection screen
The GB number displayed in the GB screen
when you are in Tracking mode is the neutral
GB plus the Offset setting. For example, if
neutral ground balance is 45 and the Offset
setting is +5, then the displayed number is 50.
Some experimentation with the Tracking GB
Offset may be required while detecting so that
you may find your optimum setting.
Use + for positive
GB Offset
Use – for negative
GB Offset
Remember, your Tracking Ground
Balance Offset will only function
when you are using the Ground
Balance Tracking mode.
When the Tracking GB Offset is not
neutral (0) the Tracking icon will
flash when you are in the Ground
Balance menu.
The X-Terra 705 is capable of using different
types of AA batteries:
1.5 V Alkaline
1.5 V Carbon
1.5 V Lithium (non-rechargeable)
1.2 V NiMH (rechargeable)
1.2 V NiCad (rechargeable)
Rechargeable Lithium Ion batteries
will give a combined voltage above
8 V and therefore cannot be used with
the X-Terra 705.
The graph below is a representation of how 1.5 V and 1.2 V batteries may discharge over time.
How the detector is used will affect how long the batteries last for.
Overvoltage
If the battery voltage is
too high (above 8V), the
battery icon will flash
and the detector will shut
down.
Full
2 black segments
inside the outline.
Half
1 black segment
inside the outline.
Low
The icon will begin to
flash for a period of
time and there will be
audio announcements
every 60 seconds before
the detector finally
shuts down.
battery behaviour
When the detector battery is low, the speaker
volume will be reduced; saving battery power
and extending detecting time. The headphone
volume is not affected.
The use of headphones will
extend battery life.
1.5 V Alkaline
1.2 V NiMH/NiCad
Approximate Time in Hours
45