Bosch GMS 120 - Инструкция по эксплуатации - Страница 12

12

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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.

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