Measuring Procedure; Working Advice - Bosch D-tect 120 Professional Manual Original

OBJ_BUCH-2149-001.book Page 16 Wednesday, March 26, 2014 5:19 PM
16 | English
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.
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
2 609 141 143 | (26.3.14)
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).
Power Cable
When a live conductor is detected, the display 3 also indi-
cates a
with a quick tone sequence.
Notes:
"Live" conductors are indicated in any operating mode.
"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" conduc-
tors cannot be securely detected. The signal strength of a
"live" conductor depends on the position of the cable. There-
fore, apply further measurements in close proximity or use
other information sources to check if a "live" conductor exists.
Static electricity can lead to electric lines being indicated in-
accurately, e.g. over a large area, or not at all. To improve the
indication, place your free hand flat on the wall next to the
is displayed and the
measuring tool, in order to remove the static electricity.
 Hold the measuring tool only at the intended grip area
10, so as not to influence the measurement.
Marking Objects
If required, detected objects can be marked. Perform meas-
urement as described. Once you have found the boundaries
or the centre of an object, mark the sought location at the top
marking aid 1 and the side marking aid 4. Connect both points
with a vertical and horizontal line. The object is located at the
intersection of the lines.

Working Advice

Temperature Control
Note: If the device is lifted off the wall, a signal may be shown
temporarily.
When the temperature control indicator e lights up, the bat-
tery of the measuring tool is not within the operating temper-
ature range or was subject to large variations in temperature.
Change the battery or wait until it has once again reached
the operating temperature range.
Warning Function
When the display 3 indicates f and g send the measuring tool
to an authorised customer service agent. The measuring tool
is no longer functional.
. The LED 2 flashes red and the signal sounds
Bosch Power Tools