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OBJ_BUCH-1545-004.book Page 16 Monday, May 7, 2012 9:33 AM
16 | English
Switching On and Off
To switch on the measuring tool, slide the On/Off switch 8 to
the "On" position. Immediately after switching on, the meas-
uring tool sends laser beams out of the exit openings 1.
Do not direct the laser beam at persons or animals
(especially not at their eye level), and do not stare into
the laser beam yourself (not even from a distance).
To switch off the measuring tool, slide the On/Off switch 8 to
the "Off" position. When switching off, the levelling unit is
locked.
When the measuring tool is not moved or remote-controlled
for approx. 30 minutes, it switches off automatically to save
the batteries or the battery pack.
After switching off automatically, switch the measuring tool
off via On/Off switch 8 and then on again, if required.
GSL 2 Set: After switching off automatically, the measuring
tool can be switched on again by pressing any button on the
remote control.
Do not leave the switched on measuring tool unattended
and switch the measuring tool off after use. Other per-
sons could be blinded by the laser beam.
When exceeding the maximum permitted operating tempera-
ture of 50 °C, the measuring tool switches off to protect the
laser diode. After cooling down, the measuring tool is ready
for operation and can be switched on again.
Operation with battery pack: The "Electronic Cell Protec-
tion (ECP)" protects the lithium ion battery pack against deep
discharging. When the battery pack is discharged, the meas-
uring tool is switched off by a protective circuit.
When the measuring tool switches off automatically due to a
discharged battery pack, switch the measuring tool off with
the On/Off switch 8. Charge the battery pack before switch-
ing the measuring tool on again. Otherwise, the battery pack
could become damaged.
Allowing the Measuring Tool to Level In
After switching on, the levelling function automatically com-
pensates irregularities within the self-levelling range of
The levelling is finished as soon as the laser beams do not
move any more.
If the automatic levelling function is not possible, e.g. be-
cause the surface on which the measuring tool stands devi-
ates by more than 4° from the horizontal plane, the laser
beams flash.
Set up the measuring tool in level position and wait for the
self-levelling to take place. As soon as the measuring tool is
within the self-levelling range of
✁
continuously.
In case of ground vibrations or position changes during oper-
ation, the measuring tool is automatically levelled in again,
yet, possibly to a different height when larger position chang-
es are the case. Upon re-levelling, check if the two laser
beams are aligned at the reference point (see "Aligning the
Height of the Measuring Tool", page 16) in order to avoid ver-
tical errors.
1 618 C00 51C | (7.5.12)
Aligning the Height of the Measuring Tool
The measuring tool generates two laser beams that can be
seen on the floor surface in front of the measuring tool for dis-
tances beyond 50 cm. The beams must be brought into align-
ment at this reference point, where they can initially be seen
on the floor surface. For this, turn the thumbwheel for height
adjustment 9 clockwise or anticlockwise, until both laser
beams overlap at the reference point and only one beam can
be seen.
When the two laser beams cannot be aligned by turning the
thumbwheel, the position of the measuring tool is signifi-
cantly above or below the floor surface. Position the measur-
ing tool at a different location on the floor surface with less
height deviation and align the laser beams there.
Starting Operation of the Remote Control
(GSL 2 Set)
The remote control remains ready for operation as long as a
battery with sufficient voltage is inserted.
The signals of the remote control should reach the reception
lens 4 directly from the front and inclined from above. When
the remote control cannot be pointed directly against a recep-
tion lens, the working range is reduced. By reflecting the sig-
nal (e.g. against walls), the working range can be improved,
even for indirect signals.
Switching the measuring tool on via the remote control after
automatic shut-off of the measuring tool is only possible when
the On/Off switch 8 is still in the "On" position. Switching the
measuring tool off with the remote control is not possible.
4 °.
✁
Measuring Procedure
Manual Rotation (GSL 2)
Rotate the upper part of the measuring tool to the location
that you want to check. After rotating, wait until the measur-
ing tool has levelled in again and the laser beams no longer
move. Then, check if the laser beams run opaque.
Automatic Rotation (GSL 2 Set)
To check the surface, rotate the upper part of the measuring
4 °, the laser beams light up
tool with the remote control. Manual rotation is not possible.
The following rotation modes are available:
Protect the remote control against moisture and direct
sunlight.
Do not subject the remote control to extreme tempera-
tures or variations in temperature. As an example, do not
leave it in vehicles for longer periods. In case of large varia-
tions in temperature, allow the remote control to adjust to
the ambient temperature before putting it into operation.
Press button 19 to start fast, continuous rotation in
clockwise direction. Pressing button 19 again ends
the rotation.
Press button 14 to start fast, continuous rotation in
anticlockwise direction. Pressing button 14 again
ends the rotation.
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