Operation Modes; Measuring Procedure - Bosch D-tect 120 Professional Originalbetriebsanleitung

OBJ_BUCH-2149-002.book Page 16 Monday, September 29, 2014 2:25 PM
16 | English
– Safe function is ensured only when one of the operating
mode selector buttons lights up.
 Before switching the measuring tool on, make sure that
the sensor area 14 is not moist. If required, dry the mea-
suring tool using a soft cloth.
 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 6
.
To switch off the measuring tool, press the On/Off button 6
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
The audio signal can be switched on/off with the audio signal
button 5 . When the audio signal is switched off, the dis-
play 3 indicates the information c.
Method of Operation (see figure B)
The measuring tool checks the base material of the sensor ar-
ea 14 in measurement direction A. Objects are detected that
differ from the material of the wall.
Always move the measuring tool over the base material apply-
ing light pressure, without lifting it off or changing the pres-
sure. The measuring tool can be moved in any direction B.

Operation Modes

As soon as the measuring tool is switched on, you can switch
between different operating modes.
By selecting the operating modes, you can adjust the measur-
ing tool to different wall materials and, if required, suppress
unwanted objects.
If the wall material is not known, you should begin with the
Universal mode.
The selected operating mode is indicated by the illuminated
button.
Universal (preset)
The operating mode "Universal" is suitable for
most applications in masonry. Metal objects, wa-
ter-filled plastic pipes, electrical lines and cables
are indicated. Cavities in building brick or empty
plastic pipes with a diameter of less than 2 cm
may not be displayed. The maximum measuring
depth is 6 cm.
Concrete
The operating mode "Concrete" is especially
suitable for applications in reinforced concrete.
Rebars, metal pipes, water-filled plastic pipes,
electrical lines and cables are indicated. The
maximum measuring depth is 12 cm.
1 609 92A 0Y7 | (29.9.14)
Drywall
The operating mode "Drywall" is suitable for de-
tecting joists, metal supports, electrical lines and
cables in drywalls (wood, plasterboard, etc.).
Water-filled plastic pipes are also indicated.
Empty plastic pipes are normally not detected.
The maximum measuring depth is 6 cm.

Measuring Procedure

Locating objects
Position the measuring tool on/against the surface being in-
spected.
If there is already an object below the measuring tool when it
is placed down, the LED 2 lights up red if there is sufficient
signal strength, the measuring indicator h deflects and a sig-
nal sounds.
If an object has not yet been detected when the tool is placed
down, the movement indicator j
LED 2 lights up yellow. Move the measuring tool over the sur-
face without lifting it off, until the movement indicator j disap-
pears. Then the LED 2 lights up green at places where the
measuring device has not detected an object.
When the measuring tool approaches an object, the deflec-
tion in the measuring indicator h increases and the LED 2
lights up red. The deflection decreases when the measuring
tool moves away from an object.
With small or low-lying objects the LED 2 can continue to light
up yellow and the signal does not sound.
Determining the object's centre
If an object is detected, the LED 2 lights up red and with suffi-
cient signal strength, the orientation arrows k are displayed to
determine the object's centre. To specifically locate the ob-
ject's centre, move the measuring tool in the direction of the
orientation arrows k.
If the orientation arrows are not displayed, an object may nev-
ertheless be located in the immediate vicinity.
The measuring indicator h indicates the maximum deflection
when it is situated over the centre of an object, the LED 2
lights up red and if there is sufficient signal strength, the cen-
tre cross i is displayed. For a more accurate determination of
the object's centre, pay attention to the square which if there
is sufficient signal strength is shown in the immediate vicinity
of the object's centre in addition to the centre cross i.
Wider objects in the base material can be identified by a con-
tinuous, high deflection of the measuring indicator h. The LED
2 lights up red.
 Always pay attention to all the signals of the measuring tool
(LED, measuring indicator, orientation arrows).
To rule out hazards, safeguard yourself before you drill, saw
or rout in walls, by means of other information sources. As the
measuring results can be influenced by ambient conditions or
the wall material, there may be a hazard even though the indi-
cator does not indicate an object in the sensor area (there is
no signal sound and the LED 2 lights up green).
is displayed and the
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