Bosch GOL 20 - Инструкция по эксплуатации - Страница 10

10

 | English 

1 609 92A 271 | (8.11.16)

Bosch Power Tools

Focusing the Telescope

Remove the lens cap from the objective lens 

1

.

Direct the telescope against a bright object or 
hold a white sheet of paper in front of the ob-
jective lens 

1

. Turn the eyepiece 

6

 until the 

crosshair appears sharp and deep black.

Direct the telescope towards the levelling rod, if required with 
help of the optical peep sight 

2

. Turn the focusing knob 

16

 un-

til the graduation field of the levelling rod appears sharp. Align 
the crosshair exactly with the centre of the levelling rod by 
turning the horizontal drive screw 

14

.

When the telescope is correctly focussed, the crosshair and 
the image of the levelling rod must remain aligned when mov-
ing your eye behind the eyepiece.

Measuring Functions

Always set up the levelling rod exactly vertical. Direct the 
aligned and focussed measuring tool against the levelling rod 
in such a manner that the crosshair faces centrally against the 
levelling rod.

Reading Off the Height

Read off the height of the levelling rod at the 
centre line of the crosshair.

Height measured in the figure: 1.195 m.

Measuring a Distance

Centre the measuring tool above the point 
from which on the distance is to be measured.

Read off the height of the levelling rod at the 
top and bottom stadia lines. Multiply the differ-
ence of both heights by 100 to receive the dis-
tance from the measuring tool to the levelling 
rod.

Distance measured in the figure: 
(1.347 m – 1.042 m) x 100 = 30.5 m.

Measuring Angles

Centre the measuring tool above the point from which on the 
angle is to be measured.

Direct the measuring tool against point 

A

. Rotate the horizon-

tal circle 

10

 with the zero point toward the reference mark 

9

. 

Then direct the measuring tool against point 

B

. Read off the 

angle at the reference mark 

9

.

GOL 20 D/GOL 26 D/GOL 32 D:  Angle  measured  in  the 
example: 45 °.

GOL 20 G/GOL 26 G/GOL 32 G: Angle measured in the 
example: 45 gon.

Accuracy Check of the Measuring Tool

Check the levelling and indication accuracy of the measuring 
tool each time before using and after longer transport of the 
measuring tool.

Checking the Circular Bubble Vial

Align the measuring tool with the levelling screws 

12

 so that 

the air bubble is positioned in the centre of the circular bubble 
vial 

7

. 

Rotate the telescope by 180 °. When the air bubble is no long-
er in the centre of the circular bubble vial 

7

, the circular bub-

ble vial must be readjusted.

Readjusting the Circular Bubble Vial

Bring the air bubble of the circular bubble vial 

7

 in a position between the centre and the end 

position of the check by turning the levelling 
screws 

12

.

Using the Allen key 

17

, turn the adjusting screws 

11

 until the 

air bubble is positioned in the centre of the circular bubble vi-
al.

Check the circular bubble vial by rotating the telescope by 
180 °. If required, repeat the procedure or refer to an author-
ised Bosch after-sales service.

Checking the Compensator

After aligning and focussing the measuring tool, measure the 
height at a reference point. Then press the lock button of the 
compensator 

8

 and release again. Measure the height again at 

the reference point.

If both heights do not exactly match, have the measuring tool 
repaired by an authorised Bosch after-sales service.

A

B

A

B

x°

9

10

9

10

17

11

OBJ_BUCH-1239-005.book  Page 10  Tuesday, November 8, 2016  2:22 PM