Bosch GPL 3 Professional Manual Original página 13

OBJ_BUCH-807-002.book Page 13 Tuesday, September 30, 2008 1:13 PM
Operation
Initial Operation
Protect the measuring tool against mois-
ture and direct sun irradiation.
Do not subject the measuring tool to ex-
treme temperatures or variations in tem-
perature. As an example, do not leave it in
vehicles for longer periods. In case of large
variations in temperature, allow the measur-
ing tool to adjust to the ambient temperature
before putting it into operation. In case of
extreme temperatures or variations in tem-
perature, the accuracy of the measuring tool
can be impaired.
Avoid heavy impact or falling of the measur-
ing tool. After heavy exterior impact on the
measuring tool, an accuracy check should
always be carried out before continuing to
work (see "Levelling Accuracy").
Switch the measuring tool off during trans-
port. When switching off, the levelling unit,
which can be damaged in case of intense
movement, is locked.
Switching On and Off
To switch on the measuring tool, push the
On/Off switch 4 upward so that "I" is indicated
on the switch. Immediately after switching on,
the measuring tool sends a laser beam out of
each exit opening 1.
Do not point the laser beam at persons or
animals and do not look into the laser beam
yourself, not even from a large distance.
To switch off the measuring tool, push the
On/Off switch 4 downward so that "0" is indi-
cated on the switch. When switching off, the lev-
elling unit is locked.
Bosch Power Tools
Setting the Automatic Switch-off
By default, the measuring tool automatically
shuts off 20 minutes after being switched on.
The automatic switch-off can be set from 20 min-
utes to 8 hours. For this, switch the measuring
tool on, then immediately off, and then on again
within 4 s. To confirm the change, all laser beams
will flash quickly for 2 s after switching on the
second time.
Do not leave the switched on measuring
tool unattended and switch the measuring
tool off after use. Other persons could be
blinded by the laser beam.
When switching on the measuring tool the next
time, the automatic switch-off is set to 20 min-
utes again.
Working with Automatic Levelling
Position the measuring tool on a level and
firm support, attach it to the holder 8 or to the
tripod 18.
After switching on, the automatic levelling func-
tion automatically compensates irregularities
within the self-levelling range from ± 5° (longi-
tudinal axis) and ± 3° (lateral axis). The levelling
is finished as soon as the laser points do not
move any more.
If the automatic levelling function is not possible,
e.g. because the surface on which the measuring
tool stands deviates by more than 5° or 3° from
the horizontal plane, the laser beams flash rapid-
ly. In this case, bring the measuring tool to the
level position and wait for the self-levelling to
take place. As soon as the measuring tool is with-
in the self-levelling range of ± 5° or ± 3° respec-
tively, all laser beams light up continuously again.
In case of ground vibrations or position changes
during operation, the measuring tool is automati-
cally levelled in again. To avoid errors by moving
the measuring tool, check the position of the laser
beams with regard to the reference points upon
re-levelling.
1 609 929 S08 | (30.9.08)
English | 13