Practical Advice - Bosch LR40G Operating/Safety Instructions Manual

If the laser beam hits the reception area (1)
at the height of the center line of the laser
receiver, the center line indicator (h) and LOC
is displayed on the text indicator. The Center-
Lock symbol is displayed on the rotary laser
on the start screen for the corresponding axis.
In the event of changes to the position of the
laser receiver or rotary laser, the inclination
is automatically adjusted on the rotary laser.
u Take great care when working with the
CenterLock mode that rotary lasers and
laser receivers are not moved uninten-
tionally. Incorrect measurements can arise
from the automatic adjustment of the incli-
nation with every change of position.
Cancelling CenterLock mode:
To cancel or end the CenterLock mode, press
and hold the CenterFind mode button (17).
If the laser beam was already successfully
aligned with the center line of the laser receiv-
er at this point, the set inclination remains on
the rotary laser even when CenterLock mode
is cancelled.
Troubleshooting:
If the laser beam was unable to find the cen-
ter line of the laser receiver within 2 min (no
matter whether at the start of the mode or
after changes to position), ERR appears in the
text display (e) and all LED direction indica-
tors light up.
Press any button on the rotary laser and one
on the laser receiver to close the error mes-
sages. Reposition the rotary laser and laser
receiver so that the laser receiver is situated
within the pivoting range of ±8.5 % of the
rotary laser. Ensure that the laser receiver is
aligned to the X-axis or Y-axis so that the la-
ser beam can pass through the reception area
(1) horizontally. Then restart the CenterLock
mode.
If both axes of the rotary laser should be
aligned to a laser receiver, the same center
function must be set on both laser receivers.
A combination of CenterLock mode and Cen-
terFind mode is not possible. If CenterFind
mode is already set on one axis and Center-
Lock mode is started on the other axis, ERR
and CF will appear alternately in the text dis-
play (e). Select CenterLock mode on both la-
ser receivers and re-start the function.
Anti-strobe protection filter
The laser receiver has electronic filters for
strobe light. The filters protect against, for ex-
ample, interference from the warning lights of
construction machinery.

Practical Advice

Aligning with the spirit level
The laser receiver can be aligned vertically
(plumb line) with the spirit level (7). If a laser
receiver is mounted at an angle, it will give
incorrect measurements.
Marking
You can mark the position of the laser beam at
the center mark (9) on the left and right of the
laser receiver when the beam hits the center
of the reception area (1).
When marking, take care to align the laser
receiver so that it is exactly vertical (with a
horizontal laser beam) or horizontal (with a
vertical laser beam), as otherwise the marks
are offset with respect to the laser beam.
Attaching using the bracket (see figure E)
You can use the bracket (23) to attach the la-
ser receiver to a measuring rod (25) (acces-
sory) as well as to other objects with a width
of up to 2.5 in.
Screw the bracket (23) to the mount (11) on
the rear side of the laser receiver with the fas-
tening screw (26).
Loosen the rotary knob (24) on the bracket,
slide the bracket onto the measuring rod (25)
and retighten the rotary knob (24).
You can use a spirit level (21) to ensure that
the bracket (23) is horizontally aligned along
with the laser receiver. If a laser receiver is
mounted at an angle, it will give incorrect
measurements.
The center line (22) of the bracket is located
at the same height as the center mark (9) and
can be used to mark the laser beam.
Attaching using a magnet (see figure F)
If an attachment is not required to be espe-
cially secure, the laser receiver can be at-
tached to steel parts using the magnets (10).
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