Starting Operation; Switching On/Off - Bosch GMS 100 M Professional Notice Originale

12 | English
measurement and switch off the corresponding
functions or tools.

Starting Operation

Switching on/off

Before switching on the measuring tool, ensure that
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the sensor area (7) is dry. If necessary, use a cloth to
dry the measuring tool.
If the measuring tool has been exposed to a significant
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change in temperature, leave it to adjust to the ambi-
ent temperature before switching it on.
To switch on the measuring tool, press the on/off
button (4).
To switch off the measuring tool, press the on/off
button (4) again.
If no button on the measuring tool is pressed for approx.
5 mins, and no objects are detected, the measuring tool will
automatically switch itself off to preserve battery life.
Switching audio signal on/off
You can also switch off the audio signal by pressing and
holding the on/off button (4) for a few seconds when the
measuring tool is switched on. When the audio signal is
switched off, the audio signal indicator (a) appears on the
display.
How it works (see figure B)
The measuring tool checks the base material of the sensor
area (7) in the measurement direction A up to the maximum
detection depth. Objects that are different from the material
of the wall are detected.
Move the measuring tool in a straight line in direction B over
the wall.
Always move the measuring tool over the base material ap-
plying light pressure, without lifting it off or changing the
pressure.
During the measurement, the contact pads (6) must always
remain in contact with the surface.
Measuring process
After switching on, the light-up ring (1) lights up green.
Place the measuring tool on the surface to be examined and
move it in direction B.
– When the measuring tool approaches an object, the amp-
litude in the measuring indicator (h) increases and the
light-up ring (1) lights up yellow.
– The amplitude decreases when the measuring tool moves
away from the object.
– Above the centre of an object, the measuring indicator
will indicate maximum amplitude; the light-up ring (1) will
light up red and an audio signal will sound.
For small or deep-lying objects, the light-up ring (1) can con-
tinue to light up yellow without the audio signal sounding.
Wide objects are not indicated by the light-up ring or
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the audio signal throughout their complete width.
1 609 92A 6V7 | (16.08.2021)
As soon as the measuring tool has located an object below
the centre of the sensor, the fine scale (i) is activated. In or-
der to locate an object more precisely, move the measuring
tool repeatedly (3×) back and forth over the object. The fine
scale indicates a full amplitude when the object is below the
centre of the sensor (regardless of how many bars are dis-
played in the measuring indicator (h)).
Wider objects in the base material can be identified by a con-
tinuous high amplitude of the measuring indicator (h) and
fine scale (i). The light-up ring (1) will light up yellow. The
duration of the high amplitude corresponds approximately
with the object width.
If very small or deep-lying objects are being sought and the
measuring indicator (h) reacts only slightly, move the meas-
uring tool repeatedly over the object in a horizontal and ver-
tical direction. Pay attention to the amplitude of the fine
scale (i).
Before drilling, sawing or routing into walls, refer to
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other sources of information to ensure that you elim-
inate hazards. As the measuring results can be influ-
enced through ambient conditions or the nature of the
wall, there may be a hazard even though the measuring
indicator (h) does not indicate an object in the sensor
area, no audio signal sounds and the light-up ring (1)
lights up green.
Display of metal objects
If the measuring tool passes over a metal object (the light-up
ring (1) will light up red), the type of metal will be shown in
the display. For magnetic metals (e.g. iron) the Magnetic
metal indicator (d) will appear, for non-magnetic metals
(e.g. copper) the Non-magnetic metal indicator (c) will ap-
pear.
To differentiate between the types of metal, the measuring
tool must be located over the metal object found (the light-
up ring (1) lights up red and the fine scale (i) shows a high
amplitude).
Note: For reinforcement steel mesh and reinforcements in
the examined based material, an amplitude is indicated over
the entire surface in the measuring indicator (h). For rein-
forcement steel mesh, it is typical that the magnetic metal
indicator (d) appears directly above the iron rods, whereas
the non-magnetic metal indicator (c) will appear between
the iron rods.
Live wire indicator
When a live wire is detected, the indicator for live wires (e)
will appear on the display. Move the measuring tool over the
surface again in order to locate the live wire more precisely.
After moving the measuring tool over the surface multiple
times, the live wire can be detected very precisely. If the
measuring tool is very close to the wire, the light-up ring (1)
will flash red and the audio signal will sound at a faster rate.
Notes:
– Live wires can be detected more easily when power con-
sumers (e.g. lamps, appliances) are connected to the
wire being sought and switched on. Switch off electricity
consumers before drilling, sawing or milling into the wall.
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