Theory Of Operation - PRONIVO SmartTRAK ST101 Manual

THEORY OF OPERATION

The SmartTRAK magnetic locator nds
ferrous metal objects by sensing the
difference between two uxgate sensors
that are arranged in a manner to balance
out the Earth's magnetic eld. The output
of the sensors are presented as both a
visual and audio indication of magnetic
eld strength.
When both sensors see the same broad
magnetic eld strength as with the Earth's
magnetic eld, the speaker produces a
low frequency tone and the visual indicator
shows a low or zero magnetic signal
strength.
When a ferrous metal object is ap-
proached, the balance between the
sensors is changed causing the audio
frequency and visual indication to increase
in proportion to the magnetic eld being
sensed until a peak is reached when
directly over the object. The SmartTRAK
102 also shows a visual indication of the
polarity of the magnetic eld strength. A
"Plus" (+) indication is a North polarity
magnetic eld and a "Minus" (-) indication
is a South polarity magnetic eld.
Note: The locator will not detect non-
ferrous metals such as copper, brass,
silver, gold, and aluminum. Nor will these
non-ferrous metals interfere with the
detection of ferrous metals. Likewise,
non-metal materials such as asphalt,
stone, ice, water, snow, wood, plastic,
and soil composition will not interfere with
the detection or affect detection range of
ferrous metals.
Note: Be aware of ferrous metal objects
you may have on your person such as belt
buckle, key chain, steel toe shoes, zippers,
pocketknife, watch, cell phone, etc. These
items can interfere with detecting the
object of interest.
Magnetic
Field
Iron Stake Iron Stake Iron Stake Iron Stake Iron Stake Iron Stake Iron Stake Iron Stake
Sensor coils unbalanced by magnetic eld of
- 18 -
Upper Sensor Upper Sensor
Tip Sensor Tip Sensor
iron stake.