-21-
u
Protect the laser level and remote control
against moisture and direct sunlight.
u
Do not expose the laser level or remote
control to any extreme temperatures or
variations in temperature. For example, do
not leave them in a car for extended periods
of time. In case of large variations in tem-
perature, allow the laser level and the remote
control to adjust to the ambient temperature
before putting them into operation. Before
continuing work with the laser level, always
perform an accuracy check (see “Accuracy
Check of the Laser level”, page 28). The preci-
sion of the laser level may be compromised if
exposed to extreme temperatures or fluctua-
tions in temperature.
u
Avoid substantial knocks to the laser level
and avoid dropping it. Always carry out an
accuracy check before continuing work if the
laser level has been subjected to severe ex-
ternal influences (see “Accuracy Check of the
Laser level”, page 28).
Starting Operation of the
remote control
The remote control will only work if it is fitted
with batteries that are sufficiently charged.
After pressing a button on the remote control,
the operation indicator (33) will light up, indi-
cating that a signal has been sent out.
It is not possible to switch the laser level on/
off with the remote control.
Starting Operation of the
rotary laser
Setting up the laser level
Horizontal position
Vertical position
(only GRL4000-80CHV)
Position the laser level on a stable surface in
the horizontal or vertical position, mount it on
the tripod (44) or on the wall mount (45) with
the alignment unit.
Due to its high leveling accuracy, the laser
level is very sensitive to knocks and vibrations
and changes in position. Take care, therefore,
that the laser level is stable to avoid interrup-
tions to the operation caused by releveling.
Operating the laser level
The main functions of the laser level are con-
trolled by the buttons on the laser level and
the remote control (41). Additional functions
are available via the remote control (41), the
laser receiver (42), or by controlling remote-
ly via the Bosch Leveling Remote App (see
“Overview of control options for the func-
tions”, page 35).
For the indicator on the laser level’s display
(15), the following applies:
– The current settings for this function will be
indicated when a function button (e.g. the
line operation button (5)) is pressed for the
first time. The settings will be changed the
next time a function button is pressed.
– In the lower part of the display, softkey sym-
bols (i) are shown in various menus. The
corresponding function keys (softkeys)
arranged around the display can be used
to execute the functions represented by
the symbols (i) (see figure B). Depending
on the corresponding menu, the symbols
show the usable function buttons (e.g. the
rotational operation button in the rotational
operation menu (6)) or additional functions
such as Next ( ), Back ( ) or Confirm ( ).
– The softkey symbols (i) also make it easy to
recognise whether the Slope button down/
Button for clockwise rotation (3) and Slope
button up/Button for anticlockwise rotation
(4) buttons in the current menu are used to
slope downwards (▼) or slope upwards (▲)
or to turn in a clockwise ( ) or anticlock-
wise ( ) direction.
– The function menus or status messages can
be exited at any time by briefly pressing the
on/off button (11). This will save the last
setting of the function menu.
– The display will automatically go back to
the start screen five seconds after the last
press of a button.
– The display (15) will light up with every
press of a button or signal that reaches the
measuring tool. The light will go out ap-
proximately one minute after the last press
of a button.
Operation
