Bosch GOL 20 G Original Instructions Manual page 13

Reading Off the Height
Read off the height of the levelling
rod at the centre line of the cross-
hair.
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 difference 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.
A
A
B
20
x °
Direct the measuring tool against point A. Ro-
tate the horizontal circle 10 with the zero point
toward the reference mark 9. Then direct the
measuring tool against point B. Read off the an-
gle at the reference mark 9.
GOL 20 D/GOL 26 D: Angle measured in the ex-
ample: 45°.
GOL 20 G/GOL 26 G: Angle measured in the ex-
ample: 45 gon.
Bosch Power Tools
B
9 9
0
60
10
50
10
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 bub-
ble is no longer in the centre of the circular bub-
ble vial 7, the circular bubble vial must be re-
adjusted.
Readjusting the Circular Bubble Vial
Using the Allen key 17, turn the adjusting screws
40
11 until the air bubble is positioned in the cen-
10
tre of the circular bubble vial.
Check the circular bubble vial by rotating the
telescope by 180°. If required, repeat the proce-
dure or refer to an authorised 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.
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.
17
11
1 609 929 W93 | (31.5.10)
English | 13