Fisher M-SCOPE 1270 - Manual (Page 10)

8
IRON DISC MODE
metal. This may be tested quickly by pulling the trigger switch and sweep-
ing over an area of about one square foot. If no signal is detected, release
the trigger switch and raise the search coil off the ground, and lower it back
down two or three times (also known as “bobbing”). If an audible sound is
heard, turn the GROUND ADJUST knob slightly clockwise. Repeat this
procedure until no sound is heard when raising and lowering the coil to the
ground. Once you have the 1270 balanced to the type of ground you are
searching, you may begin sweeping the coil at a comfortable pace. Approxi-
mately four feet per second will give you optimal performance. Remember,
the ALL METAL GROUND ADJUST mode is a MOTION mode. Slight
movement of the coil is required to detect an object. While in this mode, if
the IRON DISC toggle is OFF, pushing the MODE TRIGGER forward
switches the 1270 into the NORMAL DISC mode. If the IRON DISC toggle
is ON, pushing the MODE TRIGGER forward switches the 1270 into the
IRON DISC mode. SEE PRIMARY & SECONDARY OPERATING MODES
PG. 7)
Searching in IRON DISC may be preferred when small iron objects are to
be rejected. In fact, this mode greatly improves the detectors ability to “see
through” iron trash to the good non-ferrous targets often sought after. Make
sure the ALL METAL GROUND ADJUST is OFF; that is, fully counter-
clockwise until it “clicks” into the “0” position. Flip the IRON toggle switch
up into the ON position. Adjust your sensitivity clockwise to the desired
level (preferably until a slight threshold tone is heard, at about “8” or greater).
Reduce the sensitivity slightly if you prefer silent search. In the IRON
DISC mode, you have two features that enhance the performance of the
1270: the SILENCER and the IRON DISC adjust knob. The IRON DISC
knob gives you the ability to “fine tune” the amount of iron you wish to
reject. Turning the IRON DISC knob clockwise causes larger pieces of iron
to be rejected. You may hear some normal “clicks and pops” when the coil
passes over these targets. In high trash areas, turning the SILENCER
toggle ON will reduce, and in most cases, eliminate the “clicks and pops”.
Remember that the IRON DISC mode is a MOTION mode. Slight move-
ment of the coil is required to detect an object. When IRON DISC is the
primary operating mode, pushing the MODE TRIGGER forward switches
the 1270 into the NORMAL DISC mode. SEE PRIMARY & SECONDARY
OPERATING MODES PG. 7)
ALL METAL MODE