9
ALL METAL MODE
Your 1270 gives you two ways to search in all-metal operation: (1) by set-
ting your NORMAL DISC to 0, or (2) by turning on the ALL METAL GROUND
ADJUST (rotate knob clockwise). When using the ALL-METAL GROUND
ADJUST mode, only the VOLUME and the SENSITIVITY controls are still ac-
tive: you have temporarily disabled the other controls on the 1270 (it
becomes the “primary” operating mode, as explained above). In this
mode, you must manually adjust the 1270 for the type of ground you
are searching. Turn the GROUND ADJUST knob switch on (to about “1”),
and the sensitivity to about “8”. Make sure the search coil is not near
> PRIMARY AND SECONDARY OPERATING MODES
A “primary” operating mode is active when the MODE TRIGGER
switch is in the Normal (center) position, and the “secondary”
operating mode is active when the MODE TRIGGER is in the Swap
position (pushed and held). The following front panel settings will show
you how to achieve your favorite primary and secondary operating
modes. This will allow you to quickly change modes without losing
any settings to gain more information about your targets.
Primary = NORMAL DISC
Secondary = IRON DISC:
ALL-METAL GROUND ADJ. is OFF (0).
IRON switch is OFF.
·
Primary = IRON DISC
Secondary = NORMAL DISC:
ALL-METAL GROUND ADJ. is OFF (0).
IRON switch is ON.
·
Primary = ALL-METAL GROUND ADJ.
Secondary = NORMAL DISC:
ALL-METAL GROUND ADJUST is ON
(set to proper ground compensation).
IRON switch is OFF.
·
Primary = ALL-METAL GROUND ADJ.
Secondary = IRON DISC:
ALL-METAL GROUND ADJ. is ON
(set to proper ground compensation).
IRON switch is ON.
.
*This info available as a chart on page 16
CONTROLS & FUNCTIONS
SEARCH TECHNIQUES
Good searching techniques are every bit as important as having
a good detector.
1. Adjust your SENSITIVITY control. Only experience will tell you how
to set it in every situation. As general rule, turn up the sensitivity to
achieve maximum depth and detection of small items. You will also
get a wider search scan. Conditions may arise where you’ll need
to reduce sensitivity: (a) when near larger metal objects, (b) when
ground mineralization cause “false signals”, (c) when near sources
of interference, such as power lines or radio towers, (d) when silent
search is desired. Minimum sensitivity is when the knob is turned to
“1”, or fully counterclockwise. Maximum sensitivity is when the knob
is turned to “10”, or fully clockwise.
2. Decide how much discrimination (trash rejection) you want. In certain
areas you may wish to detect all metals, but in others, you want to
discriminate unwanted targets. Only you will be able to determine
your particular situation. Remember that a lot of “good” targets are
not necessarily silver and copper. For example, many gold, lead and
brass targets can be missed when discriminating aluminum.
3. Search slow and systematically in a tight semi-circle as shown in figure 3.
4. Keep the search coil as close to the ground, and as parallel as pos-
sible (see figure 4). The closer you are to the target, the easier it is to
detect.
5. Take your time, and overlap your sweeps by at least 50%.
6. Search an area thoroughly and from different directions, taking note
of where you have already been.
7. Keep the search coil moving at a comfortable rate. Remember, the
1270 is a motion detector. A sweep rate of about 4 feet per second
will suffice, but make sure your arm is comfortable. Moving the search
coil at a rapid rate, or “whipping,” is not necessary.
SLOW MOTION PINPOINT
When the 1270 “beeps”, you have passed over a metal target with the
search coil. Swing the 1270 search coil left and right, then forward and
back, making an “X” over the “beep” area. The target will be directly
below the center of the search coil. Raising the coil from the ground will
reduce the signal size and makes for quick, easy pinpointing. Because
the 1270 is a “motion” detector, with practice, this may be the only mode
of pinpointing you will need.
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