Bosch GMS 120 Instrucciones De Funcionamiento Y Seguridad página 9

is indicated at the same location in the
metal-detection mode, then it is likely a
metal object, wood stud or joist with nails or
screws in it. To continue searching for wood
objects, switch back to the wood-detection
mode.
When the detection tool cannot properly
detect the surface to be scanned, please
perform the following actions:
- Press and hold button 10 until the
illuminated ring lights up green.
- Start a new detecting procedure by
positioning the detection tool onto a different
wall or surface, briefly press button 10.
- In rare cases, the detection tool may not be
able to detect the surface because the side
with the sensor area 12 and the name plate
13 is dirty. Clean the detection tool with
a dry, soft cloth and restart the detecting
procedure.
SCANNINg IN mETAl-DETECTION mODE
When scanning for metal objects, press
the metal detection mode button 9. The
illuminated ring 1 and indication 4 above
button 9 light up green.
Position the detector then move it uniformly
across the surface.
• When the detector comes close to a metal
object, then the amplitude increases, as
represented by the number of bars shown
in the main detection indicator i.
• 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 detector is above the metal
object, the illuminated ring 1 lights up red
and a steady tone sounds.
To detect the object more precisely, move the
detector repeatedly (3x) back and forth over
the object. The fine scale j is automatically
activated in all operating modes. Fine scale
j indicates a full amplitude when the object is
below the center of the sensor or when the
maximum amplitude of detection indicator i
is reached. In the operating modes "Wood"
and "metal", the indication "CENTER" k
lights up.
Notes:
• 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.
• When a metal item is much narrower than
the SENSOR area, the maximum signal
might be displayed when the item is just
to the left and right under the center hole,
especially if the item is near the surface.
• Always measure SlOWly to achieve
maximum accuracy and sensitivity.
• If the metal object found is a magnetic
(e.g. iron or steel), then the indicator for
magnetic metals e is displayed. For non-
magnetic metals, the indicator for non-
magnetic metals d 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.
When scanning over steel mesh in concrete,
typically (but not always) the indicator for
magnetic metals e is displayed directly above
the rebar; the indicator for non-magnetic
metals d is displayed between the rebar's.
SCANNINg FOR "lIVE" WIRES
The "live" wire detection mode is suitable
only for detecting "live" conductors (110–
230 V).
Press button 8 to activate the "lIVE" wire
detection mode. The illuminated ring 1 and
indication 4 above button 8 light up green.
When a "live" wire/conductor is detected,
the indicator f appears on the display
3. Move the detector over the surface
repeatedly in order to localize the "live"
wire/conductor more precisely. After moving
the detector over the surface several times,
"live" wire/conductor can be located quite
precisely. If the detector is very close to the
wire/conductor, the illuminated ring 1 flashes
red and the signal tone sounds with a rapid
tone sequence.
• "live" wires/conductors are indicated in
any operating mode.
• "live" wires/conductors can be detected
more-easily when power consumers (e.g.,
lamps, appliances) are connected to the
wire/conductor being sought and switched
on.
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