Bedienungsanleitung Bosch GMS 120 (Seite 12 von 156) (Deutsch, Englisch, Holländisch, Dänisch, Französisch, Italienisch, Portugiesisch, Spanisch, Polnisch, Türkisch, Schwedisch, Norwegisch, Finnisch)

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12 | English

2 609 140 939 | (8.3.12) Bosch Power Tools

Method of Operation (see figures A–B)

The measuring tool checks the base material of sensor area

12 in measurement direction A to the max. detection depth

(see “Technical Data”). Objects are detected that differ from

the material of the wall.

Always move the measuring tool in a straight line over the sur-

face applying slight pressure, without lifting it off or changing

the pressure. During measurement, the contact pads 11 must

always have contact to the surface.

Measuring Procedure

Position the measuring tool on/against the surface being

detected, and move it in direction B. When the measuring tool

comes closer to an object, the amplitude in measuring indica-

tor i increases and ring 1 lights up yellow; when it is moved

away from the object, the amplitude decreases. Measuring

indicator i indicates the maximal amplitude above the centre

of the object; ring 1 lights up red and an audio signal sounds.

For small or deeply embedded objects, ring 1 can continue to

light up yellow, while there is no audio signal.

f Wide objects are not indicated by the illuminated ring

or the audio signal throughout their complete width.

To localise the object more precisely, move the measuring

tool 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

centre of the sensor or when the maximum amplitude of

measuring indicator i is reached. In the operating modes

“Drywall” and “Metal”, the indication “CENTER” k lights up

additionally.

Wider objects in the base material are detected through a

continuous, high amplitude of measuring indicators i and j.

Ring 1 lights up yellow. The duration of the high amplitude

corresponds approximately with the object width.

When very small or deeply embedded objects are being

sought and measuring indicator i reacts only slightly, move

the measuring tool repeatedly over the object in horizontal

and vertical direction. Pay attention to the amplitude of fine

scale j, and when in operating mode “Drywall” and “Metal”,

additionally to the

“CENTER ” k indication, which will then al-

low for precise detection.

f Before drilling, sawing or routing into a wall, protect

yourself against hazards by using other information

sources. As the measuring results can be influenced

through ambient conditions or the wall material, there may

be a hazard even though the indicator does not indicate an

object in the sensor range (no audio signal or beep and and

the illuminated ring 1 lit green).

Operating Modes

The best measuring results are achieved through selection of

the operating modes. The maximal detection depth for metal

objects is achieved in the operating mode “Metal”. The max-

imal detection depth for “live” conductors is achieved in the

operating mode “Power cable”. The selected operating

mode can be recognized at any time via the green illuminated

operating-mode indication 4.

Drywall

The operating mode “Drywall” is suitable for detecting wood

or metal objects in drywalls.

Press button 10 to activate the operating mode “Drywall”.

The operating-mode indication 4 above button 10 lights up

green. As soon as the measuring tool is positioned against the

base material to be detected, ring 1 lights up green and sig-

nals operational readiness.

In the operating mode “Drywall” all object types are detected

and indicated:

– Non-metal, e.g. a wood beam

– Magnetic, e.g. reinforcing steel

– Non-magnetic, but metal, e.g. copper pipe

– “Live”, e.g. a “live” conductor

Notes: In the operating mode “Drywall”, other objects, apart

from wood and metal objects and “live” conductors are also

detected, such as plastic tubing filled with water. For such

objects, the indication c for non-metal objects is indicated in

display 3.

Nails and screws in the base material may cause a wooden

beam to be indicated as a metal object on the display.

When display 3 indicates a continuously high amplitude of

measuring indicator i and fine scale j, restart the measuring

procedure again by positioning the measuring tool at a differ-

ent location on the base material.

When the illuminated ring 1 does not signal operational read-

iness when positioning the measuring tool on the base mate-

rial being detected, the measuring tool cannot properly de-

tect the base material.

– Press and hold button 10 until the illuminated ring lights up

green.

– When starting a new measuring procedure afterwards and

positioning the measuring tool onto a different wall or sur-

face, you must briefly press button 10.

– In rare cases, the measuring tool may not be able to detect

the base material because the side with the sensor area 12

and the type plate 13 is soiled or dirty. Clean the measur-

ing tool with a dry, soft cloth and restart the measuring pro-

cedure.

Metal

The operating mode “Metal” is suitable for detecting magnet-

ic and non-magnetic objects independent of the wall material.

Press button 9 to activate the operating mode “Metal”. The il-

luminated ring 1 and indication 4 above button 9 light up

green.

When the detected metal object is of magnetic metal (e.g.

iron), the symbol e is indicated on display 3. For non-magnet-

ic metals, the symbol d is indicated. In order to differentiate

between metal types, the measuring tool must be positioned

above the detected metal object (ring 1 is lit red).

Note: For reinforcement steel mesh and steel in the examined

base material, an amplitude is indicated over the complete

surface of measuring indicator i. For reinforcement steel

mesh, it is typical that the symbol e for magnetic metal is indi-

cated on the display directly above the iron rods, whereas be-

tween the iron rods, the symbol d for non-magnetic metal will

appear.

OBJ_BUCH-1222-005.book Page 12 Thursday, March 8, 2012 11:26 AM

Bosch GMS 120 Seite 12

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