White’s Electronics Goldmaster GMT - Manual (Page 9)

7
Chapter 3 GMT Quick Start
Quick Start
Instructions
With the GMT properly assembled and the batter-
ies installed, follow the instructions below to start
finding those nuggets!
Set the Ground Balance Toggle to the
Fast Autotrac position. "▼"
Set the Audio Signal Boost to the center
(OFF) position. "▼"
Set the IRON I.D. toggle (under the hand
grip) to the center (Audio Iron I.D. OFF)
position.
Set the Variable SAT Speed between the
3x and 4x position. "▼"
Turn the GAIN control clockwise until the
power clicks "ON".
While holding the detector with the
search coil in the air, rotate the GAIN
control clockwise to a point between the
7 & 8 position. "▼"
Turn the THRESHOLD control fully
counterclockwise, then turn it clockwise
until you hear a soft threshold "hum".
Lower the search coil to the ground, then
“pump” the coil up and down 2"-4" a
couple of times and Fast AutoTrac will
automatically balance or track out the
ground mineralization.
Start swinging the search coil in wide
sweeps that overlap each other.
If you experience false signals or constant
beeping or popping, turn the GAIN down
a bit. You may notice a slight fluctuation in
the THRESHOLD “hum” as the GMT
tracks out the ground mineralization.
Also,
1
2
3
4
5
6
7
8
9
10
if the meter and audio indicate "Bad Ground"
turn the GAIN down till overload goes away.
* SPECIAL NOTICE * SPECIAL NOTICE * SPECIAL NOTICE * SPECIAL NOTICE * SPECIAL NOTICE
If you attempt to demonstrate or test the
GMT by waving targets in the air in front
of the search coil, it is ESSENTIAL to
have the GROUND BALANCE toggle in
the MANUAL position, NOT FAST
AUTO TRAC
This is necessary, for when the GMT is in
the FAST AUTOTRAC position, the
search coil must SEE ground while it is
passing over the target or it will think
that the target IS ground and will attempt
to track it out. This is the case whether
you are demonstrating with or without
Iron ID.
You may, however, demonstrate the fast
ground balancing feature of FAST
AUTOTRAC or GRAB by waving or
pumping a mineralized rock in the air in
front of the search coil.
Thus, testing the GMT with targets while
in FAST AUTOTRAC must be done in or
on the ground.