Bosch DMD4 Instrucciones De Funcionamiento Y Seguridad página 6

BM 2609140574 08-08
PRELIMINARY METAL SCAN
When scanning for metal objects, press the
metal detection mode button 6. The metal
detection mode indicator c is indicated in the
display and the illuminated ring 1 lights up green.
Position the multi-detector then move it
uniformly across the surface.
• When the multi-detector
comes close to a metal object,
then the amplitude increases,
as represented by the number
of bars shown in the main
measuring indicator f.
• When it moves away from the
object, the amplitude and
number of bars shown
decreases.
At the position of maximum
amplitude, the metal object is
located below the center of the
sensor (below the marking
opening 2).
As long as the multi-detector is above the
metal object, the illuminated ring 1 lights up
red and a steady tone sounds.
• The ability to detect nails, screws, rebar and
other metal objects is somewhat dependent
on their orientation. For example, at any
given depth it is easier for the unit to detect
the length of a screw or nail than it is to
detect the end of a screw or nail.
• The entire width (3-1/8" / 8 cm) of the detector
can detect metal near the surface of scanned
items, so the unit is wide enough to scan for
metal near the surface of a 3" wide board prior
to sanding or planing.
• When a metal item is much narrower than
the SENSOR area, the maximum signal
might be displayed when the item is just
under the left and right of the center hole,
rather than the center of the hole, especially
if the item is near the surface.
• Always measure SLOWLY to achieve
maximum accuracy and sensitivity
• Use the ZOOM feature to maximize
sensitivity, especially important when
searching for deep items prior to drilling,
sawing, nailing and/or routing.
9/3/08 8:40 AM
Scanning in Metal-Detection Mode
Notes:
Page 6
ZOOM METAL SCAN
The ZOOM mode should be used AFTER the
Preliminary Metal Scan for the purposes listed
below.
• ALWAYS start the ZOOM Metal Scan near
the location that the metal object was
detected in the Preliminary Metal Scan.
• Press the "ZOOM" button 4 and KEEP IT
PRESSED while continuing to move the
multi-detector over the area. Observe only
the ZOOM measuring indicator e.
Precision Location - The ZOOM function can
be used to more-precisely locate the center of
a metal object and for distinguishing between
close metal objects. The "ZOOM" measuring
indicator e has the greatest amplitude over the
center of the metal object.
Detection of Small or Deep Objects - The
ZOOM function can also be used when very
small or deeply embedded metal objects are
being detected but the main measuring
indicator f does not react.
Detection Though Material With Metal
inclusions - The ZOOM function can also be
used if there are any metal inclusions in the
material being scanned, such as wire mesh in
lath and plaster walls, then a continuous
signal is indicated in the main measuring
indicator f.
MAGNETIC VS. NON-MAGNETIC METALS
If the metal object found is a magnetic (e.g.
iron or steel), then the indicator for magnetic
metals h is displayed.
For non-magnetic metals, the indicator for
non-magnetic metals i is displayed.
In order for the multi-detector to differentiate
between the metal types, it must be positioned
above the detected metal object and the
detection must be strong enough that the
illuminated ring 1 lights up red.
For weak signals, the indication of the metal
type is not possible. For steel wire mesh and
similar reinforcements in the scanned
structural material, amplitude of the main
measuring indicator f is displayed over the
complete surface. In this case, always use the
"ZOOM" function for the scan. When scanning
over steel mesh in concrete, typically (but not
always) the indicator for magnetic metals h is
displayed directly above the rebar; the
indicator for non-magnetic metals i is
displayed between the rebars.
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