Maintenance And Service; Maintenance And Cleaning - Bosch D-tect 120 Professional Originalbetriebsanleitung

16 | English
inate hazards. As the measuring results can be influ-
enced through ambient conditions or the condition of the
wall, there may be a hazard even though the measuring
indicator (e) does not indicate an object in the sensor
range and the indicator light (12) lights up green.
Determining an object's centre
If an object is detected, the signal light (12) will light up red.
With sufficient signal strength, the orientation arrows (d) are
displayed to determine the object's centre.
To locate the object's centre, move the measuring tool in the
direction of the orientation arrow (d) displayed.
Over the centre of an object, the measuring indicator (e) will
exhibit maximum deflection, and with sufficient signal
strength, the centre cross (c) will appear. The orientation
arrow (d) will also disappear.
For a more accurate location of the object's centre, pay at-
tention to the square; if there is sufficient signal strength,
this will be shown in the immediate vicinity of the object's
centre in addition to the centre cross (c).
If the orientation arrows (d) are not displayed, an object may
nevertheless be located in the immediate vicinity.
Always check all the signals of the measuring tool (in-
u
dicator light, measuring indicator and orientation ar-
rows for locating the object's centre).
Indicator for live wires
The scan for live wires takes place automatically for each
measurement (regardless of the operating mode).
Errors – causes and corrective measures
Error
Measuring tool cannot be switched on.
Measuring tool is switched on but not respond-
ing.
Battery pack temperature monit-
oring indicator (g) is shown on
the display
Note: When lifting the measuring tool off the
wall, the (g) indicator may appear briefly, even
when the temperature is normal.
Interference from radio waves
indicator (h) shown in display
Service indicator (f) shown on
display

Maintenance and Service

Maintenance and Cleaning

Check the measuring tool before each use. If the meas-
u
uring tool is visibly damaged or parts have become loose
1 609 92A 4X7 | (24.02.2021)
When a live wire is detected, the indicator for live wires (a)
appears in the display, the indicator light (12) flashes red
and the audio signal sounds at a faster rate.
Notes:
– In certain conditions (such as behind metal surfaces
or behind surfaces with high water content), live
wires cannot always be detected. The signal strength of
a live wire depends on the position of the cable. There-
fore, take further measurements in close proximity or use
other information sources to check if a live wire is
present.
– Static electricity can cause wires to be detected inaccur-
ately (e.g. over a large area) or prevent them from being
detected at all. To improve the detection, place your free
hand flat on the wall next to the measuring tool, in order
to remove the static electricity.
– Live wires can be detected more easily when power con-
sumers (e.g. lamps, appliances) are connected to the
wire being sought and switched on. Switch off electricity
consumers before drilling, sawing or milling into the wall.
Marking objects
If required, detected objects can be marked. Perform a
measurement as usual.
Once you have found the boundaries or the centre of an ob-
ject, mark the sought location at the top marking aid (1) and
the side marking aid (2). Connect the points with a vertical
and horizontal line. The boundary or the centre of the object
is located where the lines intersect.
Cause
Battery pack or batteries empty
Battery pack is outside the oper-
ating temperature range or has
been subjected to large fluctu-
ations in temperature
Interference from radio waves
(e.g. from Wi-Fi, UMTS, radar,
transmitter masts or microwaves)
The measuring tool has developed
a fault and is no longer functional.
inside the measuring tool, safe function can no longer be
ensured.
Always keep the measuring tool clean and dry to ensure op-
timum, safe operation.
Never immerse the measuring tool in water or other liquids.
Corrective measures
Charge the battery pack or change the
batteries.
Remove the battery pack or batteries
and put them back in again.
Wait until the battery pack is within the
permitted temperature range again or
change the battery pack.
If possible, deactivate all tools whose ra-
diation could interfere with the measure-
ment and switch off the corresponding
functions or tools.
Send the measuring tool to an author-
ised Bosch after-sales service centre.
Bosch Power Tools