Manual Bosch GMS 100 M Professional (page 11 of 130) (English, German, Dutch, Danish, French, Italian, Polish, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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Bosch Power Tools 1 609 929 Y44 | (10.5.11)

Operation

f Protect the measuring tool against moisture and direct

sun light.

f Do not subject the measuring tool to extreme tempera-

tures or variations in temperature. In case of large var-

iations in temperature, allow the measuring tool to ad-

just to the ambient temperature before switching it on.

In case of extreme temperatures or variations in tempera-

ture, the accuracy of the measuring tool and the display in-

dication can be impaired.

f Use or operation of transmitting systems, such as

WLAN, UMTS, radar, transmitter masts or microwaves,

in the close proximity can influence the measuring

function.

Initial Operation

Switching On and Off

f Before switching the measuring tool on, make sure that

the sensor area 6 is not moist. If required, dry the meas-

uring tool using a soft cloth.

f If the measuring tool was subject to an extreme tem-

perature change, allow it to adjust to the ambient tem-

perature before switching 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.

When no button on the measuring tool is pressed for approx.

5 minutes and when no objects are detected, the measuring

tool automatically switches off to save the battery.

Switching the Audio Signal On/Off

When the measuring tool is switched on, the audio signal can

be switched on or off by pressing the On/Off button 4 for a few

seconds. When the audio signal is switched off, indication a

appears on the display.

Method of Operation (see figures A–B)

The measuring tool checks the base material of sensor area 6

in measurement direction z 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 5 must

always have contact to the surface.

Measuring Procedure

After switching on, the illuminated ring 1 lights up green.

Position the measuring tool against the surface being detect-

ed and move it toward the x- and y-axis. When the measuring

tool comes closer to an object, the amplitude in the main scale

h increases and ring 1 lights up yellow; when it is moved away

from the object, the amplitude decreases. The main scale h

indicates the maximal amplitude above 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.

As soon as the measuring tool has localised an object below

the centre of the sensor, the fine scale i is activated.

To localise the object more precisely, move the measuring

tool repeatedly (3x) back and forth over the object.

The fine scale i indicates a maximum amplitude when the ob-

ject is positioned precisely below the centre of the sensor, in-

dependent thereof how many bars are displayed in the main

scale h.

When very small or deeply embedded objects are being sought

and main scale h reacts only slightly, move the measuring tool

repeatedly over the object in horizontal (x-axis) and vertical

(y-axis) direction. Observe the amplitude of fine scale i.

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).

Metal

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

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

ic metals, the symbol c 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 and fine scale

i indicates a high amplitude).

Note: For reinforcement steel mesh and steel in the examined

base material, an amplitude is indicated over the complete

surface of the main scale h. For reinforcement steel mesh, it

is typical that the symbol d for magnetic metal is indicated on

the display directly above the iron rods, whereas between the

iron rods, the symbol c for non-magnetic metal will appear.

Power Cable

When a “live” conductor is detected, indication e appears on

the display 3. Move the measuring tool repeatedly over the

area to localise the “live” conductor more precisely. After

moving over the “live” conductor several times, it can be indi-

cated very accurately. When the measuring tool is very close

to the conductor, the illuminated ring 1 rapidly flashes red

and the audio signal beeps swiftly.

Notes:

– “Live” conductors can be detected easier when power con-

sumers (e.g. lamps, machines) are connected to the

sought conductor and switched on.

– Under certain conditions (such as below metal surfaces

or behind surfaces with high water content), “live” con-

ductors cannot be securely detected. The signal

strength of a “live” conductor depends on the position of

the cable. Therefore, apply further measurements in close

proximity or use other information sources to check if a

“live” conductor exists.

– Voltage-free conductors can be detected as metal objects.

This does not apply for stranded conductors (contrary to

solid conductors or cable).

– Static electricity can lead to inaccurate indication of elec-

tric lines, e.g., over a large range. To improve the indica-

tion, place your free hand flat on the wall next to the meas-

uring tool, in order to remove the static electricity.

OBJ_BUCH-1418-002.book Page 11 Tuesday, May 10, 2011 8:18 AM

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Bosch GMS 100 M Professional Manual

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