Operating instructions
CONTROLS
A
On/Off
Tune
Control
. B Sensitivity
Control
C
Function
Control
1)
Discriminate Level
Control
E
Control
Box
Fasteners
F .ADC
Control
G Meter
H Battery Check
I Upper Stem and Handle
J
Middle
Stem
K
Lower
Stem
L
ADC
(Control
Box)
M Search Head
N Cable Socket (Head Lead)
ASSEMBLY
Diagram 1.
How
to
Assemble
your
12OO-B
for
Use.
Your
12oo-B comes
to
you
dismantled
for
ease
of
packing.
To
assemble
follow
these f8"1
easy
steps.
1. Locate the stems
in
the special
compartment
in
the packaging.
2. Loosen
the
knurled
nut
on the upper stem and handle
(I).
3. Insert
middle
stem (J)
into
upper stem and
tighten
the knurled nut.
4.
Attach
lower
stem
(K)
to
the
search head (M)
with
the
nut
and
bolt
provided, tightening
the
latter
finger
tight
(do
not
use
any
tools
as
you
may damage the
nut
and
bolt!
5. Insert
lower
stem (K)
into
middle stem
(J)
and tighten knurled nut.
6.
rJol" coil the
hec"d
cable around the
whole
stem assembly, insert the plug
into
the
head
cable socket (N) ensuring
that
it
is
correctly
aligned, and
twist
locking collar.
Please
ensure
that
the search head cable
is
not
coiled around the stem assembly
too
tightly
especially
at
the
search head end, thus allowing
sufficient
play, avoiding damage should
the head be moved in relation
to
the stem.
BATTERIES
Now
that
you
have assembled
your
1200-B, all
that
is
required before
you
use
it
is
the povver supply.
Your
1200-B can be powered
by
two
types
of
power
source:
12 Penlight batteries
of
HP7
type
or
12
Rechargeable
Nickel.Cadmium
Penlight batteries.
Please
Note:
It
is
advisable
to
use
batteries manufactured
by
a
well-known
manufacturer,
as
80%
of
faults occurring
with
metal detectors
can
be traced
to
faulty
or
badly connected batteries.
To
fit
batteries
turn
control
box fasteners (E)
Alii.
. . - -
...
i
anticlockwise
through
90
0
•
Lay the
top
of
the I
..
control
box
next
to
the lower half, ensuring
there
is
no strain
on
the
wires connecting the
two
halves. Insert the batteries
into
the
battery
holders supplied. Seat
each
holder in
battery
well and ensure connections are
firm
and
tight.
Replace
top
half
of
control
box
and replace
fasteners.
Battery life
will
be longer
if
headphones are used.
CONTROLS
AND
WHAT
THEY
DO
" _
A.
ON/OFF
TUNE
CONTROL
Diagram 2.
This
control
turns
the
detector
on and
off
and sets the tuning level.
It
must
be
used in
conjunction
'./\lith
the
ADC
Control
(F).
To
tune
thedeteetor
tothe
optimum
level.-turn this
control
clockwise,
whilst
at the same
time
operating
the
ADC
control,
until
a
faint
sound can. be heard and the meter reads
within
the
TUNE
position
on
the
meterscale.
Any
setting above
or
below
this
level
of
tuning
will
reduce the sensitivity
of
the
detector.
B.
SENSITIVITY
CONTROL
This
control
will
vary
the
electronic gain
of
the
detector
to
give a balance between performance and
ease
of
use.
The main purpose
of
the
control
is
to
allow
the
operator
to
reduce
the
sensitivity
of
the
detector
to
ground
effect
when operating
in
the
D modes
which
do
not
have
the
facility
to
exclude
ground
effect
on
inland sites.
It
works
on
the
principle
that
it
is
better
to
reduce
the
ground
effect
and keep a consistent
tuning
level, even
if
some
depth
penetration
is sacrificed,
than
to
operate at
the
highest sensitivity level
for
its
own
sake, and
find
the
detector
hard
to
control.
A good
illustration
of
its
function
is
the parallel
with
a car's headlights.
Although
full
beam !lives
lightin!l
power,
in
fO!l
the
3