Bosch GLM 120 C Professional - Power Management and Laser Visibility; Measuring Process; Selecting Reference Level

26 | English
1 609 92A 4F4 | (22.10.2018) Bosch Power Tools
u Protect the measuring tool from moisture and direct
sunlight.
u Do not expose the measuring tool to any extreme tem-
peratures or variations in temperature. For example,
do not leave it in a car for extended periods of time. In
case of large variations in temperature, allow the measur-
ing tool to adjust to the ambient temperature before put-
ting it into operation. The precision of the measuring tool
may be compromised if exposed to extreme temperat-
ures or variations in temperature.
u Avoid substantial knocks to the measuring tool and
avoid dropping it. Always carry out an accuracy check
before continuing work if the measuring tool has been
subjected to severe external influences Accuracy Check
of the Measuring Tool.
u The measuring tool is equipped with a wireless inter-
face. Local operating restrictions, e.g. in aeroplanes
or hospitals, must be observed.
Switching On/Off
During work, ensure that the reception lens (20), the laser
beam output (18) and the camera (19) are not closed off or
covered, otherwise correct measurement will not be pos-
sible.
– To switch on the measuring tool and the laser, briefly
press the front or side measuring button (2) [ ].
– To switch on the measuring tool without the laser, briefly
press the on/off/delete button (9) [ ].
u Do not direct the laser beam at persons or animals and
do not stare into the laser beam yourself (even from a
distance).
To switch off the laser, briefly press the on/off/delete but-
ton (9) [ ].
To switch off the camera, press the camera button (10).
To switch off the measuring tool, press and hold the on/off/
delete button (9) [ ].
The measured values and device settings in the memory are
retained when you switch the measuring tool off.
Camera
Switching on the measuring tool automatically switches on
the camera (19). To switch it off, press the camera button
(10).
For larger distances (of approx. more than five metres), a
target marker is also superimposed to mark the measuring
point.
Optimising visibility of the laser point
Especially when using the measuring tool outdoors, in sun-
light and also over long distances indoors, the laser point
may not be visible. The visibility of the laser point/measure-
ment point can additionally be improved in order to connect
the camera by:
– Setting the display brightness (tool settings)
– Using the zoom by pressing the button (5).
Measuring process
Once switched on, the measuring tool is in the length meas-
urement function. For a different measuring function, press
the button (13) [Func]. Use the button (4) [+] or the button
(11) [–] to select the required (see "Measuring functions",
page28). Activate the measuring function with the button
(13) [Func] or with the measuring button (2) [ ].
Once the measuring tool has been switched on, the rear
edge of the measuring tool is selected as the reference level
for measurement. Changing the reference level (see "Select-
ing the reference level (see figureA)", page26). Apply the
measuring tool to the point at which you want to start the
measurement (e.g. wall).
Note: If the measuring tool has been switched on using the
on/off/delete button (9) [ ], briefly press the measuring
button (2) [ ] to switch the laser on.
To initiate the measurement, briefly press the measuring
button (2) [ ]. Then the laser beam is switched off. For a
further measurement, repeat this process.
With the laser beam continuously switched on and when in
the continuous measurement function, the measurement be-
gins the first time you press the measuring button (2) [ ].
u Do not direct the laser beam at persons or animals and
do not stare into the laser beam yourself (even from a
distance).
Note: The measured value typically appears within half a
second, and no later than approximately four seconds. The
duration of the measurement depends on the distance, the
lighting conditions and the reflective properties of the target
surface. Upon completion of the measurement, the laser
beam is automatically switched off. The continuously
switched-on laser beam is not switched off after the meas-
urement (see "Continuous laser beam", page27).
Selecting the reference level (see figureA)
You can choose between four different reference levels for
the measurement:
– The rear edge of the measuring tool (e.g. when placing
against walls)
– The tip of the measuring pin (8) folded by 180° (e.g.
when measuring from a corner)
– The front edge of the measuring tool (e.g. when measur-
ing from a table edge)
– The centre of the thread (17) (e.g. for tripod measure-
ments)
The folding out and in of the measuring pin (8) by 180° is de-
tected automatically and the appropriate reference level is
suggested. Confirm the setting by pressing the measuring
button (2) [ ].
Select the settings for the measuring tool using the soft key
(3) [ ]. Use the button (4) [+] or the button (11) [–] to
select the reference level and confirm this by pressing the
button (13) [Func].
The rear edge of the measuring tool is automatically preset
as the reference level every time the measuring tool is
switched on.