Fisher M-SCOPE 1270 - Manual (Page 11)

NORMAL DISC MODE
When rejection of a full range of other non-ferrous trash is desired, the
NORMAL DISC mode will be necessary. Make sure the ALL METAL
GROUND ADJUST is OFF; that is, fully counterclockwise until it “clicks”
into the “0” position. The IRON toggle switch must also be OFF. Adjust
the NORMAL DISC knob to reject the unwanted “trash” targets (see figure
2). When the NORMAL DISC is set at “0”, all metals will be detected. As
you turn the NORMAL DISC knob clockwise, certain metals will be re-
jected. At the full setting of “10”, most iron, foil, and aluminum will be
rejected, while copper and silver will still yield a good signal. Adjust your
sensitivity clockwise to the desired level (preferably until a slight thresh-
old tone is heard, at about “8” or greater). Reduce the sensitivity slightly if
you prefer silent search. In high trash areas, turning the SILENCER toggle
ON will reduce, and in most cases, eliminate the “clicks and pops” that
result from some rejected targets. Remember that the NORMAL DISC
mode is a MOTION mode. Slight movement of the coil is required to detect
an object. When NORMAL DISC is the primary operating mode, pushing
the MODE TRIGGER forward switches the 1270 into the IRON DISC mode.
SEE PRIMARY & SECONDARY OPERATING MODES PG 7). )
9
Typical 1270 audio responses (with silencer off) for 2-inch deep targets with
search coil sweeping 1 to 2 inches above ground.
Figure #2