Minelab EQUINOX 800 - Pinpointing Technique; Pinpointing a Target Manually

Pinpointing Technique
A good pinpointing technique helps you to quickly narrow down the location of a
buried target, allowing you to determine its exact location before digging.
By combining a good pinpointing technique with the EQUINOX
Pinpoint function, you will be able to accurately locate a buried
target within an area before you dig.
For additional information on Pinpointing with the help
of the Pinpoint function, read 'Pinpoint' on page 36.
It is possible to pinpoint a target successfully without
using Pinpoint, however this requires practice.
Coil Configuration and Pinpointing
The standard EQUINOX Series EQX 11 detector coil has a wire
winding configuration know as Double-D.
When pinpointing, it is useful to know that a Double-D coil has
two overlapping wire windings in the shape of two D’s. The regions
created by the overlapping windings (running from the front
centre of the coil to the back) is the most sensitive area and will
give the loudest response when a target is directly beneath it.
The line shows the strongest signal zone
on the EQX 11 coil. This is also the same
for all EQX Double-D accessory coils.
Front view of the
Double-D strongest signal
profile.
The strongest signal
occurs where the Tx and Rx
coil windings overlap.
The benefits of this configuration include lower noise susceptibility
(especially in mineralised ground), higher sensitivity, and a very
thorough search pattern requiring less sweep overlap.
Double-D coils may produce complex signals from
shallow targets. Sometimes three separate signals can
be heard for a single target as the coil is swept over it.
Make a line where the strongest
signal is heard.
Move 90° and repeat.
The intersection of the two lines marks the
exact location of the target.
Pinpointing a Target Manually
1. Sweep the coil slowly across the target location keeping the
coil parallel to the ground.
2. Locate the centre of the target by listening for the loudest
target signal response.
3. Make a mental note of the position, or mark a line on the soil
with your shoe or a digging tool.
4. Move to one side so that you can pass the coil over the target
at right angles to your initial direction.
5. Line up the target at 90° from the initial direction and repeat
the process. The object is located where the two imaginary
lines cross.
2-3
4-5
Beep!
Beep!
Pinpointing Technique | 19Contents