12
25
OPERATION & CONTROLS
• In DISC mode press-
and-hold to enter
no-motion
PINPOINT mode
• In ALL-METAL mode
press-and-hold
while bobbing coil,
to set ground
balance
In DISC mode:
Change discrimination level from 0 to 80
In ALL-METAL mode:
Change Ground Balance
setting from 0 to 99.9
HOW TO WORK
THE CONTROLS
ON/OFF/GAIN:
• Click ON/OFF
• In DISC mode rotate
to change GAIN
(sensitivity) from
1 to 100
• In ALL-METAL mode
rotate to change
GAIN from 5 to 100
in steps of 5
MODE SELECTION
and THRESHOLD CONTROL
• Click left to operate
in DISCrimination
mode
• Click to right to
operate in ALL-METAL
mode.
• Rotate knob in
ALL-METAL mode to
change THRESHOLD from
-40 to 40
POWERING UP
Click the left knob to turn the detector ON.
After clicking the knob on, continued clockwise rotation will increase the
“sensitivity” in DISC mode or the “GAIN” in ALL-METAL mode.
We suggest keeping the GAIN below 70 until you become familiar with
the detector’s operation.
TARGET DISPLAY and AUDIO
SIGNAL Indicator
The lower-left bargraph designates
SIGNAL strength only when operating in
Discrimination mode.
The signal strength indicator at the bottom-
left of the screen indicates how large or
close the buried metal target is.
If all bars are illuminated, the target is
large or close to the searchcoil.
If one or two bars are illuminated, the
target is far away or small, or both.
DEPTH Indicator
When operating in Discrimination mode, a
target’s location and size can be verified
using the PINPOINT control.
Press PinPoint to temporarily detect metal
without searchcoil motion, and a
monotone hum.
While holding the PinPoint button, the
DEPTH indicator will appear.
The
number beneath DEPTH represents the
distance of the object, in inches, from the
searchcoil. The Depth scale is calibrated
to coin-sized objects. For objects other
than a coin, the numeric value is a relative
measure of the target’s depth.
AUDIO FEEDBACK
When a target is detected, the G2 will
respond with two types of sound:
1. VCO, or
Voltage Controlled
Oscillator, is an audio response
with variable pitch and volume.
2. A LOW tone beep.
In Discrimination mode, targets which fall
into the zone along the arc whose
segments are shaded will be identified
with a LOW tone beep and solid segments
with a VCO.
As the user sets the discrimination level
with the
+
and
-
buttons, he is determining
which targets will induce the low tone, and
which will be eliminated.
All targets’ audio responses in All-Metal
mode will be VCO.
VCO, or Voltage Controlled Oscillator, is
an audio response which provides a good
feel for the target.
The stronger the target signal, the higher
the volume and the higher the audio pitch.
Very weak signals will have the faintest
volume and lowest pitch.
For this reason, the use of headphones
is always recommended for detecting the
smaller and deeper targets.
2-DIGIT TARGET INDICATOR
In Discrimination mode the 2-digit target
indicator, in the middle of the screen,
provides a specific target value to help
identify buried targets more accurately.
With practice in the field, you will learn to
associate target values with the probable
identification of buried objects. The target
value can vary each time the searchcoil
passes over the target, depending upon
the orientation of the object and its
distance from the searchcoil.
As a starting point, refer to the table below.
T
T
A
A
R
R
G
G
E
E
T
T
R
R
e
e
a
a
d
d
o
o
u
u
t
t
The table below lists some common
approximate target values. With
experience in the field, you will
recognize many types of metal
objects by their numeric value.
O
O
B
B
J
J
E
E
C
C
T
T
T
T
A
A
R
R
G
G
E
E
T
T
I
I
.
.
D
D
.
.
foil from gum wrapper
47 - 48
U.S. nickel (5¢ coin)
typically 58
aluminum pull-tab
60 - 75
aluminum screwcap
70 - 80
zinc penny (dated after 1982)
typically 78
aluminum soda pop can
75 - 85
copper penny, clad dime
typically 83
U.S. quarter (25¢ coin), clad
typically 85
50¢ coin, modern clad
typically 87
old silver dollar coin
typically 89
US silver Eagle $1 coin
typically 91
Caution:
The target indications are
visual references. Many other types of
metal can also be represented by a given
target I.D.
