Inserting The Battery; Initial Operation; Operation Modes - Bosch D-tect 120 Professional Manual Original

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Inserting the battery

 Use only original Bosch battery packs with the voltage
listed on the nameplate of your measuring tool. When
using other battery packs, e.g. imitations, reconditioned
battery packs or other brands, there is danger of injury as
well as property damage through exploding battery packs.
Note: Use of battery packs not suitable for the measuring tool
can lead to malfunctions of or cause damage to the measuring
tool.
Insert the charged battery 13 into the handle until you feel it
engage and it is flush with the handle.
Inserting/removing AA battery adapter
(see figure D)
 The AA battery adapter is only intended for the use in cer-
tain Bosch measuring tools and cannot be used with other
power tools.
Inserting AA battery adapter
Place the cover 17 into the slot 11. Place the batteries on the
sealing cap 16 as per the illustration. Next, slide the sealing
cap 16 over the batteries until you feel it engage and it is flush
with the handle.
Removing AA battery adapter
Press the unlocking buttons 12 of the sealing cap 16. Pull off
the sealing cap. Take care that the batteries do not fall out. Re-
move the batteries. To remove the inside cover 17, reach into
the cover and pull it out of the measuring tool by applying light
pressure to the side wall.
Rechargeable battery/battery indicator
The rechargeable battery/battery indicator b always displays
the current battery status:
– Battery fully charged
– Battery has 2/3 of its capacity or less
– Battery has 1/3 of its capacity or less
– Battery has 10% capacity or less
– Change battery
Operation
 Protect the measuring tool against moisture and direct
sun light.
 Do not subject the measuring tool to extreme tempera-
tures or variations in temperature. As an example, do
not leave it in vehicles for longer periods. In case of large
variations in temperature, allow the measuring tool to ad-
just to the ambient temperature before putting it into oper-
ation.
 Hold the measuring tool only at the intended grip area
10, so as not to influence the measurement.
 Use or operation of transmitting systems, such as
WLAN, UMTS, radar, transmitter masts or microwaves,
in the close proximity can influence the measuring
function.
 The measuring values can be impaired through certain
ambient conditions. These include, e.g. the proximity
Bosch Power Tools
of devices that produce strong electric, magnetic or
electromagnetic fields, moisture, metallic building ma-
terials, foil-laminated insulation materials or conduc-
tive wallpaper or tiles. Therefore, also observe other in-
formation sources (e.g. construction plans) before
drilling, sawing or routing into walls, ceilings or floors.

Initial Operation

Switching On and Off
Check the measuring tool before each use. In the following
cases, safe function can no longer be ensured:
– The measuring indicator h constantly deflects, even
though you hold the device in the air.
– The measuring indicator does not deflect, even though you
keep a finger in the sensor area.
– The device has visible damage or loose components inside
the measuring tool.
– 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 meas-
uring 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.
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