Bosch GMS 100 M PROFESSIONAL: English

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

English | 11

Operation

As soon as the measuring tool has localised an object below

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

f Protect the measuring tool against moisture and direct

To localise the object more precisely, move the measuring

sun light.

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

f Do not subject the measuring tool to extreme tempera-

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

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

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

iations in temperature, allow the measuring tool to ad-

dependent thereof how many bars are displayed in the main

just to the ambient temperature before switching it on.

scale h.

In case of extreme temperatures or variations in tempera-

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

When very small or deeply embedded objects are being sought

dication can be impaired.

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

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

f Use or operation of transmitting systems, such as

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

WLAN, UMTS, radar, transmitter masts or microwaves,

in the close proximity can influence the measuring

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

function.

yourself against hazards by using other information

sources. As the measuring results can be influenced

Initial Operation

through ambient conditions or the wall material, there may

Switching On and Off

be a hazard even though the indicator does not indicate an

f Before switching the measuring tool on, make sure that

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

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

the illuminated ring 1 lit green).

uring tool using a soft cloth.

Metal

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

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

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

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

perature before switching on.

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

To switch on the measuring tool, press the On/Off button 4.

between metal types, the measuring tool must be positioned

To switch off the measuring tool, press the On/Off button 4

above the detected metal object (ring 1 is lit red and fine scale

again.

i indicates a high amplitude).

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

Note: For reinforcement steel mesh and steel in the examined

5 minutes and when no objects are detected, the measuring

base material, an amplitude is indicated over the complete

tool automatically switches off to save the battery.

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

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

Switching the Audio Signal On/Off

the display directly above the iron rods, whereas between the

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

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

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

Power Cable

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

appears on the display.

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

the display 3. Move the measuring tool repeatedly over the

Method of Operation (see figures A–B)

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

The measuring tool checks the base material of sensor area 6

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

in measurement direction z to the max. detection depth (see

cated very accurately. When the measuring tool is very close

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

to the conductor, the illuminated ring 1 rapidly flashes red

material of the wall.

and the audio signal beeps swiftly.

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

Notes:

face applying slight pressure, without lifting it off or changing

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

the pressure. During measurement, the contact pads 5 must

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

always have contact to the surface.

sought conductor and switched on.

– Under certain conditions (such as below metal surfaces

Measuring Procedure

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

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

ductors cannot be securely detected. The signal

Position the measuring tool against the surface being detect-

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

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

the cable. Therefore, apply further measurements in close

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

proximity or use other information sources to check if a

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

“live” conductor exists.

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

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

indicates the maximal amplitude above the object; ring 1

This does not apply for stranded conductors (contrary to

lights up red and an audio signal sounds. For small or deeply

solid conductors or cable).

embedded objects, ring 1 can continue to light up yellow,

– Static electricity can lead to inaccurate indication of elec-

while there is no audio signal.

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

f Wide objects are not indicated by the illuminated ring

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

or the audio signal throughout their complete width.

uring tool, in order to remove the static electricity.

Bosch Power Tools 1 609 929 Y44 | (10.5.11)