Checking The Levelling Accuracy In The Vertical Position; Calibrating The Measuring Tool; X-Axis And Y-Axis Calibration - Bosch GRL 600 CHV Professional Notice Originale

The maximum permitted deviation on the 30 m measuring
distance is as follows:
30 m × ±0.05 mm/m = ±1.5 mm. The discrepancy d
between points Ⅰ and Ⅱ must therefore amount to no more
than 3 mm for each of the two measuring processes.

Checking the levelling accuracy in the vertical position

For this check, you will need a free measuring distance on
firm ground in front of a 10-metre tall wall. Fix a plumb line
to the wall.
– Position the measuring tool in the vertical position on a
firm, level surface. Switch the measuring tool on and al-
low it to level in.
– Set up the measuring tool so that the laser beam meets
the plumb line at the exact centre of the upper end. The
discrepancy d between the laser beam and the plumb line
at the lower end of the line reveals the measuring tool's
deviation from the vertical.
For a 10-metre tall measuring distance, the maximum per-
mitted deviation is as follows:
10 m × ±0.1 mm/m = ±1 mm. The discrepancy d must
therefore be no more than 1 mm.

Calibrating the measuring tool

The following tasks should be performed only by well-trained
and qualified persons. The legalities with regard to perform-
ing an accuracy check or calibration of a measuring tool must
be known.
Perform calibration of the measuring tool with ex-
u
treme precision or have the measuring tool checked
by a Bosch customer service agent. Inaccurate calibra-
tion leads to incorrect measuring results.
Only start the calibration if you have to perform a cal-
u
ibration of the measuring tool. As soon as the measur-
ing tool is in calibration mode, you must perform the cal-
ibration meticulously to the end in order to ensure that no
incorrect measuring results are produced afterwards.
Check the levelling accuracy after every calibration (see
"Accuracy Check of the Measuring Tool", page 44). If the de-
viation is outside the maximum permitted limits, have the
measuring tool checked by a Bosch customer service agent.

X-axis and Y-axis Calibration

Calibration is only possible by using the laser receiver LR 60.
The laser receiver must be connected to the measuring tool
Bosch Power Tools
via Bluetooth® (see "Establishing a connection to the remote
control/laser receiver", page 39).
The positions of the measuring tool and laser receiver cannot
be changed during calibration (with the exception of the
alignments or rotations described). Therefore position the
measuring tool on a firm, level surface and secure the laser
receiver.
Calibration should be performed via the Bosch Levelling
Remote App if possible. There is less likelihood of error
when controlling the tool via the app. Otherwise, the meas-
uring tool's position can be altered if buttons are pressed
without due care.
For calibration without the app, the buttons on the measur-
ing tool already described must be pressed. It is not possible
to use the remote control during calibration.
A free measuring distance of 30 m on a firm surface is re-
quired. If no such measuring distance is possible, calibration
can also be performed with lower levelling accuracy on a
measuring distance of 15 m.
To mount the measuring tool and the laser receiver for
calibration:
Mount the measuring tool in the horizontal position 30 m or
15 m from the laser receiver on the tripod (44) or position it
d
on a firm, level surface.
Secure the laser receiver LR 60 at the correct height:
– Either to a wall or to another surface by means of magnets
– or to a securely fastened measuring rod (43) with the
To do this, consult the operating instructions for the laser re-
ceiver.
To align the measuring tool for calibration:
Align the measuring tool so that the X-axis indicator imprin-
ted on the measuring tool with the "+" side is pointing to the
laser receiver. For this, the X‑axis must be perpendicular to
the laser receiver.
To start calibration:
– For calibration via the Bosch Levelling Remote App:
– For calibration without the app: Switch on the measuring
or the suspension hooks on the laser receiver,
holder for the laser receiver.
Switch on the measuring tool. Start calibration in the app.
Follow the instructions in the app.
tool and the laser receiver. Make sure that both of these
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