Measuring Functions - Bosch GOL Professional 20 D Originalbetriebsanleitung

10 | English
Optical level GOL 20 D
Weight accord- 1.5 kg
ing to EPTA-Pro-
ced-
ure 01:2014
Protection rat-
ing
The serial number (15) on the type plate is used to clearly identify your measuring tool.
Operation
Check the levelling and display accuracy of the meas-
u
uring tool each time before beginning work and after
longer transport of the measuring tool.
Protect the measuring tool from moisture and direct
u
sunlight.
Do not expose the measuring tool to any extreme tem-
u
peratures or variations in temperature. For example,
do not leave it in a car for extended periods of time. In
case of large variations in temperature, allow the measur-
ing tool to adjust to the ambient temperature before put-
ting it into operation. The precision of the measuring tool
may be compromised if exposed to extreme temperat-
ures or variations in temperature.
Avoid any impact to or dropping of the measuring tool.
u
Always carry out an accuracy check before continuing
work if the measuring tool has been subjected to severe
external influences (see "Accuracy Check of the Measur-
ing Tool", page 11).
Place the measuring tool in the provided case when
u
transporting it over longer distances (e.g. in the car).
Ensure that the measuring tool is correctly placed in
the case. When placing in the case, the compensator is
locked, as the measuring tool may otherwise be damaged
by strong movements.
Setting Up/Aligning the Measuring Tool
Mounting on the Tripod
Set up the tripod so that it is stable and secured against tip-
ping over or slipping. Place the measuring tool onto the
thread of the tripod via the tripod mount (13) and secure the
measuring tool with the locking screw of the tripod.
Align the tripod roughly.
Over short distances, the measuring tool can be carried
whilst mounted on the tripod. In order to avoid damage to
the measuring tool, the tripod must be held vertically during
transport and should not e.g. be carried lengthwise over the
shoulder.
Aligning the Measuring Tool
Align the measuring tool using the levelling screws (12) so
that the air bubble is positioned in the centre of the circular
bubble vial (7).
1 609 92A 8V7 | (05.07.2023)
GOL 20 G GOL 26 D
1.5 kg 1.5 kg
IP 54 (dust and splash-proof)
1.
A
Turn the first two levelling screws A and B to move the air
bubble so that it is centred between the two levelling screws.
Then turn the third levelling screw C until the air bubble is
positioned in the centre of the circular bubble vial.
Any remaining deviation of the measuring tool from the hori-
zontal plane following the balancing of the circular bubble
vial is compensated for by the compensator.
While working, check regularly (e.g. by looking through the
bubble vial mirror (3)) whether the air bubble is still in the
centre of the circular bubble vial.
Centring the Measuring Tool over a Ground Point
If necessary, centre the measuring tool over a ground point.
To do this, hang the plumb-bob (20) on the locking screw of
the tripod. Align the measuring tool over the ground point
either by moving the measuring tool on the tripod or by ad-
justing the tripod.
Focusing the Telescope
Remove the protective cap from the lens (1).
Point the telescope at the levelling rod, using the rough
sight (2) if necessary. Turn the focusing knob (16) until the
graduation field of the levelling rod can be seen sharply.
Align the crosshairs exactly with the centre of the levelling
rod by turning the horizontal drive screw (14).
When the telescope is correctly focused, the crosshairs and
the image of the levelling rod must not move against each
other when the eye is moved behind the eyepiece.

Measuring Functions

Always set up the levelling rod exactly vertically. Point the
aligned and focused measuring tool at the levelling rod so
that the crosshairs are on the centre of the levelling rod.
GOL 26 G GOL 32 D
1.5 kg 1.5 kg
2.
B A
C
Point the telescope at a bright object or hold a
white sheet of paper in front of the lens (1).
Turn the eyepiece (6) until the crosshairs ap-
pear sharp and deep black.
Bosch Power Tools
GOL 32 G
1.5 kg
B
C