Bosch Professional GRL 350 HV Instructions Manual page 16

16 | English
Position the measuring tool in a vertical position on a firm,
level surface. Switch the measuring tool on and allow it to
level in. Align the measuring tool so that the variable laser
beam contacts the wall at right angles and cuts through the
plumb line. Switch the measuring tool off.
To start calibration mode, press and hold the manual opera-
tion button (14) and then also briefly press the on/off
button (3). Release the manual operation button only when
the X‑axis status indicator (7) flashes green and the shock-
warning function indicator (13) flashes red (both at 2×/s).
The measuring tool is switched on in calibration mode for the
Z‑axis. Wait until the measuring tool is levelled in and rota-
tional operation has started.
Align the variable laser beam so that it runs as parallel as
possible to the plumb line. To do this, press the down (5) or
up (15) slope buttons.
If it is not possible to align the laser beam in parallel to the
plumb line, align the measuring tool to the wall more pre-
cisely and start the calibration process again.
If the laser beam is aligned in parallel, save the calibration by
pressing the manual operation button (14). As confirmation,
the X-axis status indicator (7) will flash green six times.
The calibration of the Z‑axis will be saved and calibration
mode automatically ended.
Working Advice
Only the centre of the laser point or laser line must be
u
used for marking. The size of the laser point/the width of
the laser line changes depending on the distance.
1 609 92A 69Y | (23.04.2021)
Working with the Laser Target Plate (see figure A)
The laser target plate (47) improves visibility of the laser
beam in unfavourable conditions and at greater distances.
The reflective surface of the laser target plate (47) improves
visibility of the laser line. The transparent surface enables
the laser line to be seen from behind the laser target plate.
Working with the Tripod (Accessory)
A tripod offers a stable, height-adjustable support surface
for measuring. Place the measuring tool with the 5/8" tripod
mount (17) on the thread of the tripod (39). Tighten the
measuring tool using the locking screw of the tripod.
On a tripod featuring a measuring scale on its extender, you
can set the height deviation straight away.
Roughly align the tripod before switching on the measuring
tool.
Working with the WM 24 wall mount (accessory)
(see figure B)
The measuring tool can be secured to the wall using the wall
mount with the alignment unit (42). Using the wall mount is
recommended, e.g. when working above the maximum ex-
tension height of tripods, or when working on unstable sur-
faces without a tripod.
Fasten the wall mount (42) with the fastening screws (40)
to a suitable strip of wall. Fit the wall mount as perpendicular
as possible to the wall and ensure it is mounted so that it is
stable.
Screw the 5/8" screw (43) of the wall mount into the tripod
mount (17) of the measuring tool.
The alignment unit can be used to move the mounted meas-
uring tool vertically in a range of approx. 23 cm. To do this,
loosen the screw (41) on the alignment unit, slide the meas-
uring tool into the required position and retighten the
screw (41).
Working with the Laser Receiver (accessory)
Use the laser receiver (37) to improve detection of the laser
lines in adverse lighting conditions (bright environment, dir-
ect sunlight) and over greater distances.
For rotary lasers with multiple operating modes, select the
horizontal or vertical operation with the highest rotational
speed.
Before working with the laser receiver, read and observe the
laser receiver operating instructions.
Working with the measuring rod (accessory)
(see figure C)
To check levels or apply slopes, it is recommended to use
the measuring rod (38) together with the laser receiver.
A relative measuring scale is incorporated at the top of the
measuring rod (38). You can preselect its zero at the bottom
on the extender. This enables you to read deviations from
the target height straight away.
Laser Goggles (Accessory)
The laser goggles filter out ambient light. This makes the
light of the laser appear brighter to the eye.
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