Initial Operation - Bosch GMS 120 Professional Originalbetriebsanleitung

OBJ_BUCH-1222-001.book Page 15 Monday, June 28, 2010 9:28 AM
Operation
Protect the measuring tool against mois-
ture and direct sun light.
Do not subject the measuring tool to ex-
treme temperatures or variations in tem-
perature. In case of large variations in tem-
perature, allow the measuring tool to adjust
to the ambient temperature before switch-
ing it on. In case of extreme temperatures or
variations in temperature, the accuracy of
the measuring tool and the display indication
can be impaired.
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
Before switching the measuring tool on,
make sure that the sensor area 12 is not
moist. If required, dry the measuring tool us-
ing a soft cloth.
If the measuring tool was subject to an ex-
treme temperature change, allow it to ad-
just to the ambient temperature before
switching on.
To switch on the measuring tool, press the
On/Off button 5.
To switch off the measuring tool, press the
On/Off button 5 again.
When no button on the measuring tool is
pressed for approx. 5 minutes and when no ob-
jects are detected, the measuring tool automat-
ically switches off to save the battery.
Switching the Display Illumination On/Off
The display illumination can be switched on/off
with display-illumination button 6.
Switching the Audio Signal On/Off
The audio signal can be switched on/off with the
audio signal button 7. When the audio signal is
switched off, indication a appears on the dis-
play.
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 Da-
ta"). Objects are detected that differ from the
material of the wall.
Always move the measuring tool in a straight
line over the surface 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 sur-
face being detected, and move it in direction B.
When the measuring tool comes closer to an ob-
ject, the amplitude in measuring indicator i in-
creases and ring 1 lights up yellow; when it is
moved away from the object, the amplitude de-
creases. Measuring indicator i indicates the
maximal amplitude above the centre of the ob-
ject; 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.
Wide objects are not indicated by the illu-
minated 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 in-
dicates a full amplitude when the object is be-
low the centre of the sensor or when the maxi-
mum 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 meas-
uring 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 on-
ly slightly, move the measuring tool repeatedly
over the object in horizontal and vertical direc-
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